// DragonX Wallet - ImGui Edition
// Copyright 2024-2026 The Hush Developers
// Released under the GPLv3
//
// console_tab.cpp — Interactive RPC console with command history,
// tab completion, daemon log display, and color-coded output.

#include "console_tab.h"
#include "console_command_executor.h"
#include "console_command_reference.h"
#include "console_input_model.h"
#include "console_output_model.h"
#include "console_tab_helpers.h"
#include "../material/colors.h"
#include "../material/type.h"
#include "../material/draw_helpers.h"
#include "../notifications.h"
#include "../schema/ui_schema.h"
#include "../layout.h"
#include "../effects/imgui_acrylic.h"
#include "../material/color_theme.h"
#include "../theme.h"
#include "../../embedded/IconsMaterialDesign.h"
#include "../../util/i18n.h"

#include <imgui.h>
#include <cctype>
#include <cstring>
#include <sstream>
#include <algorithm>
#include <cmath>
#include <mutex>
#include <ctime>
#include <unordered_set>

namespace dragonx {
namespace ui {

// Static color definitions — defaults; overridden from ui.toml in constructor
ImU32 ConsoleTab::COLOR_COMMAND = IM_COL32(191, 209, 229, 255);
ImU32 ConsoleTab::COLOR_RESULT  = IM_COL32(200, 200, 200, 255);
ImU32 ConsoleTab::COLOR_ERROR   = IM_COL32(246,  71,  64, 255);
ImU32 ConsoleTab::COLOR_DAEMON  = IM_COL32(160, 160, 160, 180);
ImU32 ConsoleTab::COLOR_INFO    = IM_COL32(191, 209, 229, 255);
ImU32 ConsoleTab::COLOR_RPC     = IM_COL32(120, 180, 255, 210);
bool  ConsoleTab::s_scanline_enabled = true;
float ConsoleTab::s_console_zoom = 1.0f;
bool  ConsoleTab::s_daemon_messages_enabled = true;
bool  ConsoleTab::s_errors_only_enabled = false;
bool  ConsoleTab::s_rpc_trace_enabled = false;
bool  ConsoleTab::s_app_messages_enabled = true;

namespace {

std::mutex s_rpc_trace_console_mutex;
ConsoleTab* s_rpc_trace_console = nullptr;

std::string rpcTraceTimestamp()
{
    std::time_t now = std::time(nullptr);
    std::tm localTime{};
    static std::mutex timeMutex;
    {
        std::lock_guard<std::mutex> lock(timeMutex);
        if (const std::tm* current = std::localtime(&now)) {
            localTime = *current;
        }
    }

    char buffer[16];
    std::strftime(buffer, sizeof(buffer), "%H:%M:%S", &localTime);
    return buffer;
}

// Result-body channels (plain command output + JSON syntax roles) — the lines that carry
// no left accent bar and get the JSON indent guides.
bool isResultBodyChannel(ConsoleChannel ch)
{
    switch (ch) {
        case ConsoleChannel::None:
        case ConsoleChannel::JsonKey:
        case ConsoleChannel::JsonString:
        case ConsoleChannel::JsonNumber:
        case ConsoleChannel::JsonBrace:
            return true;
        default:
            return false;
    }
}

} // namespace

void ConsoleTab::refreshColors()
{
    auto& S = schema::UI();
    bool dark = material::IsDarkTheme();

    // Try schema overrides first, then use sensible per-theme defaults
    if (S.isLoaded()) {
        auto cmd = S.drawElement("console", "color-command");
        auto res = S.drawElement("console", "color-result");
        auto err = S.drawElement("console", "color-error");
        auto dmn = S.drawElement("console", "color-daemon");
        auto inf = S.drawElement("console", "color-info");
        auto rpc = S.drawElement("console", "color-rpc");

        ImU32 defCmd = dark ? IM_COL32(191, 209, 229, 255) : IM_COL32(21, 101, 192, 255);
        ImU32 defRes = dark ? IM_COL32(200, 200, 200, 255) : IM_COL32(50, 50, 50, 255);
        ImU32 defErr = dark ? IM_COL32(246,  71,  64, 255) : IM_COL32(198, 40, 40, 255);
        ImU32 defDmn = dark ? IM_COL32(160, 160, 160, 180) : IM_COL32(90, 90, 90, 200);
        ImU32 defInf = dark ? IM_COL32(191, 209, 229, 255) : IM_COL32(21, 101, 192, 255);
        ImU32 defRpc = dark ? IM_COL32(120, 180, 255, 210) : IM_COL32(25, 118, 210, 220);

        COLOR_COMMAND = !cmd.color.empty() ? S.resolveColor(cmd.color, defCmd) : defCmd;
        COLOR_RESULT  = !res.color.empty() ? S.resolveColor(res.color, defRes) : defRes;
        COLOR_ERROR   = !err.color.empty() ? S.resolveColor(err.color, defErr) : defErr;
        COLOR_DAEMON  = !dmn.color.empty() ? S.resolveColor(dmn.color, defDmn) : defDmn;
        COLOR_INFO    = !inf.color.empty() ? S.resolveColor(inf.color, defInf) : defInf;
        COLOR_RPC     = !rpc.color.empty() ? S.resolveColor(rpc.color, defRpc) : defRpc;
    } else {
        // No schema — use hardcoded defaults per theme
        COLOR_COMMAND = dark ? IM_COL32(191, 209, 229, 255) : IM_COL32(21, 101, 192, 255);
        COLOR_RESULT  = dark ? IM_COL32(200, 200, 200, 255) : IM_COL32(50, 50, 50, 255);
        COLOR_ERROR   = dark ? IM_COL32(246,  71,  64, 255) : IM_COL32(198, 40, 40, 255);
        COLOR_DAEMON  = dark ? IM_COL32(160, 160, 160, 180) : IM_COL32(90, 90, 90, 200);
        COLOR_INFO    = dark ? IM_COL32(191, 209, 229, 255) : IM_COL32(21, 101, 192, 255);
        COLOR_RPC     = dark ? IM_COL32(120, 180, 255, 210) : IM_COL32(25, 118, 210, 220);
    }
}

ImU32 ConsoleTab::channelTextColor(ConsoleChannel channel) const
{
    using namespace material;
    switch (channel) {
        case ConsoleChannel::Command:    return COLOR_COMMAND;
        case ConsoleChannel::Info:       return COLOR_INFO;
        case ConsoleChannel::Success:    return WithAlpha(Success(), 255);
        case ConsoleChannel::Warning:    return Warning();
        case ConsoleChannel::Error:      return COLOR_ERROR;
        case ConsoleChannel::Rpc:        return COLOR_RPC;
        case ConsoleChannel::Daemon:     return COLOR_DAEMON;
        case ConsoleChannel::Xmrig:      return COLOR_DAEMON;
        case ConsoleChannel::App:        return COLOR_INFO;
        // JSON syntax roles — highlight against the plain-result body.
        case ConsoleChannel::JsonKey:    return WithAlpha(Secondary(), 255);
        case ConsoleChannel::JsonString: return WithAlpha(Success(), 255);
        case ConsoleChannel::JsonNumber: return WithAlpha(Warning(), 255);
        case ConsoleChannel::JsonBrace:  return IM_COL32(200, 200, 200, 150);
        case ConsoleChannel::None:
        default:                         return COLOR_RESULT;
    }
}

ConsoleTab::ConsoleTab()
{
    {
        std::lock_guard<std::mutex> lock(s_rpc_trace_console_mutex);
        s_rpc_trace_console = this;
    }
    rpc::RPCClient::setTraceCallback([](const std::string& source, const std::string& method) {
        ConsoleTab* console = nullptr;
        {
            std::lock_guard<std::mutex> lock(s_rpc_trace_console_mutex);
            console = s_rpc_trace_console;
        }
        if (console) console->addRpcTraceLine(source, method);
    });
    rpc::RPCClient::setTraceEnabled(s_rpc_trace_enabled);

    // Load console colors from ui.toml schema (uses current theme)
    refreshColors();

    // Add welcome message
    addLine(TR("console_welcome"), ConsoleChannel::Info);
    addLine(TR("console_type_help"), ConsoleChannel::Info);
    addLine("", ConsoleChannel::None);
}

ConsoleTab::~ConsoleTab()
{
    rpc::RPCClient::setTraceEnabled(false);
    rpc::RPCClient::setTraceCallback(nullptr);
    std::lock_guard<std::mutex> lock(s_rpc_trace_console_mutex);
    if (s_rpc_trace_console == this) s_rpc_trace_console = nullptr;
}

void ConsoleTab::render(ConsoleCommandExecutor& exec)
{
    using namespace material;

    // Refresh the console theme colors on a dark/light switch. Line colors are derived
    // from each line's channel at draw time, so no per-line remap is needed.
    {
        static bool s_lastDark = IsDarkTheme();
        bool nowDark = IsDarkTheme();
        if (nowDark != s_lastDark) {
            refreshColors();
            s_lastDark = nowDark;
        }
    }

    // Pull passive log lines (daemon/xmrig output, or the lite diagnostics ring) and any
    // completed command results from the backend executor.
    exec.pollLogLines([this](const std::string& l, ConsoleChannel c) { addLine(l, c); });
    {
        std::string result;
        bool isError = false;
        while (exec.pollResult(result, isError)) addFormattedResult(result, isError);
    }

    // Drain the ingest queue into the visible model once per frame, after this frame's own
    // ingests above and any that arrived from worker threads. From here on lines_ (via
    // model_) and the selection/scroll state are touched only on this (main) thread.
    drainModel();

    // Main console layout
    ImGui::BeginChild("ConsoleContainer", ImVec2(0, 0), false,
                      ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoScrollbar);
    
    // Optional status header (lite: sync + last error) above the toolbar.
    renderStatusHeader(exec);

    // Toolbar
    renderToolbar(exec);

    ImGui::Dummy(ImVec2(0, Layout::spacingSm()));
    
    // Output area (scrollable) — glass panel background
    float availHeight = ImGui::GetContentRegionAvail().y;
    float input_height = ComputeConsoleInputHeight(
        ImGui::GetFrameHeightWithSpacing(),
        ImGui::GetStyle().ItemSpacing.y,
        Layout::spacingSm(),
        Layout::spacingXs(),
        schema::UI().drawElement("tabs.console", "input-cursor-offset").size);
    float outputH = ComputeConsoleOutputHeight(
        availHeight,
        input_height,
        schema::UI().drawElement("tabs.console", "output-min-height").size,
        schema::UI().drawElement("tabs.console", "output-min-height-ratio").size);
    
    ImDrawList* dlOut = ImGui::GetWindowDrawList();
    ImVec2 outPanelMin = ImGui::GetCursorScreenPos();
    ImVec2 outPanelMax(outPanelMin.x + ImGui::GetContentRegionAvail().x, outPanelMin.y + outputH);
    GlassPanelSpec outGlass;
    outGlass.rounding = Layout::glassRounding();
    outGlass.fillAlpha = 12;
    DrawGlassPanel(dlOut, outPanelMin, outPanelMax, outGlass);
    
    int consoleParentVtx = dlOut->VtxBuffer.Size;

    ImGui::BeginChild("ConsoleOutput", ImVec2(0, outputH), false, 
                      ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoScrollWithMouse);
    ApplySmoothScroll();
    ImDrawList* consoleChildDL = ImGui::GetWindowDrawList();
    int consoleChildVtx = consoleChildDL->VtxBuffer.Size;
    float consoleScrollY    = ImGui::GetScrollY();
    float consoleScrollMaxY = ImGui::GetScrollMaxY();
    // Use smaller font for console output
    ImGui::PushFont(Type().caption());
    ImGui::SetWindowFontScale(s_console_zoom);
    renderOutput();
    ImGui::SetWindowFontScale(1.0f);
    ImGui::PopFont();
    ImGui::EndChild();

    // Auto-toggle auto-scroll based on scroll position:
    // At the bottom → re-enable; scrolled up → already disabled by wheel handler.
    // After wheel-up, wait for the cooldown so smooth-scroll can animate
    // away from the bottom before we check position again.
    if (scroll_up_cooldown_ > 0.0f)
        scroll_up_cooldown_ -= ImGui::GetIO().DeltaTime;
    if (!auto_scroll_ && scroll_up_cooldown_ <= 0.0f && consoleScrollMaxY > 0.0f) {
        float tolerance = Type().caption()->LegacySize * 1.5f;
        if (consoleScrollY >= consoleScrollMaxY - tolerance) {
            auto_scroll_ = true;
            new_lines_since_scroll_ = 0;
        }
    }

    // CSS-style clipping mask
    // When auto-scroll is off, force bottom fade to always show by
    // inflating scrollMax so the mask thinks there's content below.
    {
        float fadeZone = std::min(Type().caption()->LegacySize * 3.0f, outputH * 0.18f);
        float effectiveScrollMax = auto_scroll_ ? consoleScrollMaxY
                                                : std::max(consoleScrollMaxY, consoleScrollY + 10.0f);
        ApplyScrollEdgeMask(dlOut, consoleParentVtx, consoleChildDL, consoleChildVtx,
                            outPanelMin.y, outPanelMax.y, fadeZone, consoleScrollY, effectiveScrollMax);
    }

    // CRT scanline effect over output area — aligned to text lines
    if (s_scanline_enabled) {
        float textLineH = output_line_height_;
        if (textLineH <= 1.0f) textLineH = Type().caption()->LegacySize * s_console_zoom + 2.0f;

        int lightAlpha = std::clamp((int)schema::UI().drawElement("tabs.console", "scanline-line-alpha").sizeOr(10.0f), 0, 255);
        int darkAlpha = std::clamp(lightAlpha + 10, 0, 255);
        if (textLineH >= 1.0f && (lightAlpha > 0 || darkAlpha > 0)) {
            ImU32 lightCol = IM_COL32(255, 255, 255, lightAlpha);
            ImU32 darkCol = IM_COL32(0, 0, 0, darkAlpha);
            for (const auto& row : scanline_rows_) {
                float yTop = std::max(row.yTop, outPanelMin.y);
                float yBot = std::min(row.yBot, outPanelMax.y);
                if (yTop < yBot) {
                    dlOut->AddRectFilled(ImVec2(outPanelMin.x, yTop), ImVec2(outPanelMax.x, yBot),
                                         (row.rowIndex % 2 == 0) ? lightCol : darkCol);
                }
            }
        }

        float panelH = outPanelMax.y - outPanelMin.y;
        float scanSpeed = schema::UI().drawElement("tabs.console", "scanline-speed").sizeOr(40.0f);
        float rawScanH = schema::UI().drawElement("tabs.console", "scanline-height").sizeOr(textLineH * 2.0f);
        int scanAlpha = std::clamp((int)schema::UI().drawElement("tabs.console", "scanline-alpha").sizeOr(8.0f), 0, 255);
        if (panelH > 1.0f && textLineH >= 1.0f && scanSpeed > 0.0f && scanAlpha > 0) {
            float scanLines = std::max(1.0f, std::round(rawScanH / textLineH));
            float scanH = scanLines * textLineH;
            float t = (float)std::fmod(ImGui::GetTime() * scanSpeed, (double)(panelH + scanH));
            float scanY = outPanelMin.y + t - scanH;
            float yTop = std::max(scanY, outPanelMin.y);
            float yBot = std::min(scanY + scanH, outPanelMax.y);
            if (yTop < yBot) {
                float mid = (yTop + yBot) * 0.5f;
                ImU32 clear = IM_COL32(255, 255, 255, 0);
                ImU32 peak = IM_COL32(255, 255, 255, scanAlpha);
                dlOut->AddRectFilledMultiColor(
                    ImVec2(outPanelMin.x, yTop), ImVec2(outPanelMax.x, mid),
                    clear, clear, peak, peak);
                dlOut->AddRectFilledMultiColor(
                    ImVec2(outPanelMin.x, mid), ImVec2(outPanelMax.x, yBot),
                    peak, peak, clear, clear);
            }
        }
    }

    ImGui::Dummy(ImVec2(0, Layout::spacingSm()));

    // Input area
    renderInput(exec);

    ImGui::EndChild();
}

void ConsoleTab::renderCommandsPopupModal()
{
    if (!show_commands_popup_) {
        return;
    }
    renderCommandsPopup();
}

void ConsoleTab::renderToolbar(ConsoleCommandExecutor& exec)
{
    using namespace material;
    ImDrawList* dl = ImGui::GetWindowDrawList();

    // Glass panel for toolbar
    float toolbarH = ImGui::GetFrameHeightWithSpacing() + Layout::spacingMd();
    ImVec2 tbMin = ImGui::GetCursorScreenPos();
    ImVec2 tbMax(tbMin.x + ImGui::GetContentRegionAvail().x, tbMin.y + toolbarH);
    GlassPanelSpec tbGlass;
    tbGlass.rounding = Layout::glassRounding();
    tbGlass.fillAlpha = 12;
    DrawGlassPanel(dl, tbMin, tbMax, tbGlass);

    ImGui::SetCursorPosY(ImGui::GetCursorPosY() + (toolbarH - ImGui::GetFrameHeight()) * 0.5f);
    ImGui::SetCursorPosX(ImGui::GetCursorPosX() + Layout::spacingMd());

    // Backend status with colored dot (daemon state / lite connection).
    {
        ConsoleStatusLine st = exec.toolbarStatus();
        if (!st.text.empty()) {
            ImVec2 cp = ImGui::GetCursorScreenPos();
            float dotR = schema::UI().drawElement("tabs.console", "status-dot-radius-base").size + schema::UI().drawElement("tabs.console", "status-dot-radius-scale").size * Layout::hScale();
            float dotY = cp.y + ImGui::GetTextLineHeight() * 0.5f;
            float dotX = cp.x + dotR + 2;

            if (st.pulse) {
                float a = schema::UI().drawElement("animations", "pulse-base-glow").size + schema::UI().drawElement("animations", "pulse-amp-glow").size * (float)std::sin((double)ImGui::GetTime() * schema::UI().drawElement("animations", "pulse-speed-fast").size);
                ImU32 pCol = (st.color & 0x00FFFFFF) | ((ImU32)(255 * a) << 24);
                dl->AddCircleFilled(ImVec2(dotX, dotY), dotR, pCol);
            } else {
                dl->AddCircleFilled(ImVec2(dotX, dotY), dotR, st.color);
            }

            ImGui::Dummy(ImVec2(dotR * 2 + 6, 0));
            ImGui::SameLine();
            Type().textColored(TypeStyle::Caption, st.color, st.text.c_str());
        } else {
            Type().textColored(TypeStyle::Caption, OnSurfaceDisabled(), TR("console_no_daemon"));
        }
    }
    
    ImGui::SameLine();
    ImGui::Spacing();
    ImGui::SameLine();
    
    // Auto-scroll toggle
    if (ImGui::Checkbox(TR("console_auto_scroll"), &auto_scroll_)) {
        if (auto_scroll_) {
            new_lines_since_scroll_ = 0;
        }
    }
    
    ImGui::SameLine();
    ImGui::Spacing();
    ImGui::SameLine();

    // Log filters (daemon/errors/rpc-trace/app) apply only to a daemon log source.
    if (exec.hasLogFilters()) {
    // Daemon messages toggle
    ImGui::Checkbox(TR("console_daemon"), &s_daemon_messages_enabled);
    if (ImGui::IsItemHovered()) {
        material::Tooltip("%s", TR("console_show_daemon_output"));
    }
    
    ImGui::SameLine();
    ImGui::Spacing();
    ImGui::SameLine();
    
    // Errors-only toggle
    ImGui::Checkbox(TR("console_errors"), &s_errors_only_enabled);
    if (ImGui::IsItemHovered()) {
        material::Tooltip("%s", TR("console_show_errors_only"));
    }

    ImGui::SameLine();
    ImGui::Spacing();
    ImGui::SameLine();

    // App RPC trace toggle — captures method/source only, never results or params
    if (ImGui::Checkbox(TR("console_rpc_trace"), &s_rpc_trace_enabled)) {
        rpc::RPCClient::setTraceEnabled(s_rpc_trace_enabled);
    }
    if (ImGui::IsItemHovered()) {
        material::Tooltip("%s", TR("console_show_rpc_trace"));
    }

    ImGui::SameLine();
    ImGui::Spacing();
    ImGui::SameLine();

    // App messages toggle — "[app] ..." wallet log lines
    ImGui::Checkbox(TR("console_app"), &s_app_messages_enabled);
    if (ImGui::IsItemHovered()) {
        material::Tooltip("%s", TR("console_show_app_output"));
    }

    ImGui::SameLine();
    ImGui::Spacing();
    ImGui::SameLine();

    }  // exec.hasLogFilters()

    // Clear button
    if (TactileButton(TR("console_clear"), ImVec2(0, 0), schema::UI().resolveFont("button"))) {
        clear();
        selection_.clear();
    }
    
    ImGui::SameLine();
    
    // Copy button — material styled
    if (TactileButton(TR("copy"), ImVec2(0, 0), schema::UI().resolveFont("button"))) {
        if (selection_.active()) {
            std::string selected = selectedText();
            if (!selected.empty()) {
                ImGui::SetClipboardText(selected.c_str());
            }
        } else {
            // Copy all output if nothing selected
            std::string all;
            for (const auto& line : model_.lines()) {
                all += line.text + "\n";
            }
            if (!all.empty()) {
                ImGui::SetClipboardText(all.c_str());
            }
        }
    }
    if (ImGui::IsItemHovered()) {
        material::Tooltip("%s", selection_.active() ? TR("console_copy_selected") : TR("console_copy_all"));
    }
    
    ImGui::SameLine();
    
    // Commands reference button (full-node RPC reference only)
    if (exec.hasRpcReference()) {
        if (TactileButton(TR("console_commands"), ImVec2(0, 0), schema::UI().resolveFont("button"))) {
            show_commands_popup_ = true;
        }
        if (ImGui::IsItemHovered()) {
            material::Tooltip("%s", TR("console_show_rpc_ref"));
        }
        ImGui::SameLine();
    }
    
    // Line count
    ImGui::TextDisabled(TR("console_line_count"), model_.size());

    ImGui::SameLine();
    ImGui::Spacing();
    ImGui::SameLine();

    // Output filter input
    float zoomBtnSpace = ImGui::GetFrameHeight() * 2.0f + Layout::spacingSm() * 3.0f;
    float filterAvail  = ImGui::GetContentRegionAvail().x - zoomBtnSpace;
    float filterW = std::min(schema::UI().drawElement("tabs.console", "filter-max-width").size, filterAvail * schema::UI().drawElement("tabs.console", "filter-width-ratio").size);
    ImGui::SetNextItemWidth(filterW);
    ImGui::InputTextWithHint("##ConsoleFilter", TR("console_filter_hint"), filter_text_, sizeof(filter_text_));
    if (filter_text_[0] != '\0') {
        ImGui::SameLine(0, Layout::spacingSm());
        std::string mc = std::to_string(filter_match_count_) + " " + TR("console_matches");
        Type().textColored(TypeStyle::Caption,
                           filter_match_count_ > 0 ? OnSurfaceMedium() : Error(), mc.c_str());
    }

    // Zoom +/- buttons (right side of toolbar)
    ImGui::SameLine();
    ImGui::Spacing();
    ImGui::SameLine();
    {
        auto& S = schema::UI();
        float zoomStep = S.drawElement("tabs.console", "zoom-step").sizeOr(0.1f);
        float zoomMin  = S.drawElement("tabs.console", "zoom-min").sizeOr(0.5f);
        float zoomMax  = S.drawElement("tabs.console", "zoom-max").sizeOr(3.0f);
        float btnSz    = ImGui::GetFrameHeight();

        if (TactileButton(ICON_MD_REMOVE, ImVec2(btnSz, btnSz), Type().iconMed())) {
            s_console_zoom = std::max(zoomMin, s_console_zoom - zoomStep);
        }
        if (ImGui::IsItemHovered()) {
            material::Tooltip(TR("console_zoom_out"), s_console_zoom * 100.0f);
        }
        ImGui::SameLine();
        if (TactileButton(ICON_MD_ADD, ImVec2(btnSz, btnSz), Type().iconMed())) {
            s_console_zoom = std::min(zoomMax, s_console_zoom + zoomStep);
        }
        if (ImGui::IsItemHovered()) {
            material::Tooltip(TR("console_zoom_in"), s_console_zoom * 100.0f);
        }
    }
}

namespace {
// Extract a hash/address-like token (a long alphanumeric run, >= 16 chars) around byte
// offset `col` in `text`, for the right-click "Copy value" action. Returns "" if none.
std::string extractCopyableToken(const std::string& text, int col)
{
    const int n = static_cast<int>(text.size());
    auto isTok = [](unsigned char c) { return std::isalnum(c) != 0; };
    int at = col;
    if (at >= n || (at >= 0 && !isTok(static_cast<unsigned char>(text[at])))) at--;
    if (at < 0 || at >= n || !isTok(static_cast<unsigned char>(text[at]))) return {};
    int s = at, e = at;
    while (s > 0 && isTok(static_cast<unsigned char>(text[s - 1]))) s--;
    while (e + 1 < n && isTok(static_cast<unsigned char>(text[e + 1]))) e++;
    std::string tok = text.substr(s, e - s + 1);
    return tok.size() >= 16 ? tok : std::string();  // txids/blockhashes/addresses are long
}

// Production ConsoleTextMeasure backed by the active ImGui font (used for word-wrap +
// per-character positioning). The pure layout module is measured against this in prod and
// a fixed-width stub in tests.
struct ImFontConsoleMeasure : ConsoleTextMeasure {
    ImFont* font;
    float   fontSize;
    ImFontConsoleMeasure(ImFont* f, float s) : font(f), fontSize(s) {}
    float width(const char* begin, const char* end) const override {
        return font->CalcTextSizeA(fontSize, FLT_MAX, 0.0f, begin, end).x;
    }
    const char* wrapPosition(const char* begin, const char* end, float wrapWidth) const override {
        return font->CalcWordWrapPositionA(fontSize / font->LegacySize, begin, end, wrapWidth);
    }
};
} // namespace

void ConsoleTab::renderOutput()
{
    using namespace material;
    auto& S = schema::UI();
    // No lock: render() already drained the ingest queue this frame, and the visible model
    // (model_) plus all selection/scroll state are touched only on this (main) thread.

    // Zero item spacing so Dummy items advance the cursor by exactly their
    // height.  The inter-line gap is added explicitly to layout_.heights
    // so that layout_.cumulativeY stays perfectly in sync with actual
    // cursor positions (avoiding selection-offset drift).
    float interLineGap = S.drawElement("tabs.console", "output").getFloat("line-spacing", 0.0f);
    ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0, 0));
    
    // Inner padding for glass panel
    float padX = Layout::spacingMd();
    float padY = Layout::spacingSm();
    ImGui::SetCursorPosY(ImGui::GetCursorPosY() + padY);
    ImGui::Indent(padX);
    
    float line_height = ImGui::GetTextLineHeight();
    output_line_height_ = line_height;  // store for scanline alignment
    output_origin_ = ImGui::GetCursorScreenPos();
    output_scroll_y_ = ImGui::GetScrollY();
    scanline_rows_.clear();
    
    // Build filtered line index list BEFORE mouse handling (so screenToTextPos works)
    ConsoleOutputFilter outputFilter{filter_text_, s_daemon_messages_enabled,
                                     s_errors_only_enabled, s_rpc_trace_enabled,
                                     s_app_messages_enabled};
    bool has_text_filter = !outputFilter.text.empty();
    // Lowercased needle for in-line match highlighting.
    std::string filter_lower;
    if (has_text_filter) {
        filter_lower = std::string(filter_text_);
        std::transform(filter_lower.begin(), filter_lower.end(), filter_lower.begin(),
                       [](unsigned char c) { return static_cast<char>(std::tolower(c)); });
    }
    bool has_filter = has_text_filter || !outputFilter.daemonMessagesEnabled ||
                      !outputFilter.rpcTraceEnabled || !outputFilter.appMessagesEnabled ||
                      outputFilter.errorsOnly;
    visible_indices_.clear();
    if (has_filter) {
        for (int i = 0; i < static_cast<int>(model_.size()); i++) {
            if (!consoleLinePassesFilter(model_[i].text, model_[i].channel, outputFilter)) continue;
            visible_indices_.push_back(i);
        }
    } else {
        // No filter - all lines are visible
        for (int i = 0; i < static_cast<int>(model_.size()); i++) {
            visible_indices_.push_back(i);
        }
    }
    int visible_count = static_cast<int>(visible_indices_.size());
    filter_match_count_ = has_text_filter ? visible_count : 0;
    
    // Calculate wrapped heights AND build sub-row segments for each visible line.
    // Each segment records which bytes of the source text appear on that visual
    // row, so hit-testing and selection highlight can map screen positions to
    // exact character offsets.
    float wrap_width = ClampConsoleWrapWidth(ImGui::GetContentRegionAvail().x, padX);
    
    ImFont* font = ImGui::GetFont();
    float fontSize = ImGui::GetFontSize();
    
    ImFontConsoleMeasure measure(font, fontSize);
    layout_ = BuildConsoleLayout(
        visible_count,
        [this](int vi) -> const std::string& { return model_[visible_indices_[vi]].text; },
        wrap_width, line_height, interLineGap, measure);
    
    // Use raw IO for mouse handling to bypass child window event consumption
    ImGuiIO& io = ImGui::GetIO();
    ImVec2 mouse_pos = io.MousePos;
    
    // Manual hit test: is mouse within this child window?
    ImVec2 win_min = ImGui::GetWindowPos();
    ImVec2 win_max = ImVec2(win_min.x + ImGui::GetWindowWidth(), 
                             win_min.y + ImGui::GetWindowHeight());
    bool mouse_in_output = (mouse_pos.x >= win_min.x && mouse_pos.x < win_max.x &&
                            mouse_pos.y >= win_min.y && mouse_pos.y < win_max.y &&
                            !ImGui::IsPopupOpen("", ImGuiPopupFlags_AnyPopup));
    
    // Disable auto-scroll when user scrolls up (wheel scroll)
    if (mouse_in_output && io.MouseWheel > 0.0f) {
        auto_scroll_ = false;
        scroll_up_cooldown_ = 0.5f; // give smooth-scroll time to animate away
    }
    // Scrolling down to the very bottom re-enables auto-scroll.
    // Actual position check happens after EndChild() using captured
    // scroll values, but is skipped on the frame where wheel-up
    // was detected (scroll position hasn't caught up yet).
    
    // Set cursor to text selection when hovering
    if (mouse_in_output) {
        ImGui::SetMouseCursor(ImGuiMouseCursor_TextInput);
    }
    
    // Mouse press - start selection (use raw IO mouse state)
    if (mouse_in_output && io.MouseClicked[0]) {
        selection_.beginDrag(screenToTextPos(mouse_pos));
    }

    // Mouse drag - extend selection (continue even if mouse leaves the window)
    if (selection_.dragging() && io.MouseDown[0]) {
        selection_.updateDrag(screenToTextPos(mouse_pos));
    }

    // Mouse release - finalize selection
    if (selection_.dragging() && io.MouseReleased[0]) {
        selection_.endDrag(screenToTextPos(mouse_pos));
    }

    // Ctrl+C / Ctrl+A
    if (mouse_in_output || selection_.active()) {
        if (io.KeyCtrl && ImGui::IsKeyPressed(ImGuiKey_C)) {
            std::string selected = selectedText();
            if (!selected.empty()) {
                ImGui::SetClipboardText(selected.c_str());
            }
        }
        if (io.KeyCtrl && ImGui::IsKeyPressed(ImGuiKey_A) && !model_.empty()) {
            selection_.selectAll(static_cast<int>(model_.size()),
                                 static_cast<int>(model_.back().text.size()));
        }
    }

    // Get selection bounds (ordered)
    ConsoleTextPos sel_start_pos = selection_.rangeStart();
    ConsoleTextPos sel_end_pos = selection_.rangeEnd();
    
    // Render lines with selection highlighting.
    // Each line is split into pre-computed wrap segments rendered individually
    // via AddText so that hit-testing and highlights map 1:1 to visual positions.
    float scroll_y = ImGui::GetScrollY();
    float window_height = ImGui::GetWindowHeight();
    float visible_top = scroll_y;
    float visible_bottom = scroll_y + window_height;
    
    // Find first visible line using binary search
    int first_visible = 0;
    if (!layout_.cumulativeY.empty()) {
        int lo = 0, hi = static_cast<int>(layout_.cumulativeY.size()) - 1;
        while (lo < hi) {
            int mid = (lo + hi) / 2;
            float line_bottom = layout_.cumulativeY[mid] + layout_.heights[mid];
            if (line_bottom < visible_top) {
                lo = mid + 1;
            } else {
                hi = mid;
            }
        }
        first_visible = lo;
    }
    
    // Add invisible spacer for lines before first visible (for correct scroll)
    if (first_visible > 0 && first_visible < static_cast<int>(layout_.cumulativeY.size())) {
        ImGui::Dummy(ImVec2(0, layout_.cumulativeY[first_visible]));
    }
    
    ImDrawList* dl = ImGui::GetWindowDrawList();
    ImU32 selColor = WithAlpha(Secondary(), 80);
    
    // Render visible lines
    int last_rendered_vi = first_visible - 1;
    for (int vi = first_visible; vi < visible_count; vi++) {
        if (vi < static_cast<int>(layout_.cumulativeY.size()) &&
            layout_.cumulativeY[vi] > visible_bottom) {
            break;
        }
        last_rendered_vi = vi;
        
        int i = visible_indices_[vi];
        const auto& line = model_[i];
        const auto& segs = layout_.segments[vi];
        ImVec2 lineOrigin = ImGui::GetCursorScreenPos();
        float totalH = layout_.heights[vi];

        // Left-edge channel accent bar, drawn in the padX margin so it never overlaps
        // the text or the selection highlight.
        if (line.channel != ConsoleChannel::None) {
            ImU32 barCol = 0;
            switch (line.channel) {
                case ConsoleChannel::Command: barCol = Primary(); break;
                case ConsoleChannel::Error:   barCol = Error(); break;
                case ConsoleChannel::Warning: barCol = Warning(); break;
                case ConsoleChannel::Success: barCol = Success(); break;
                case ConsoleChannel::Rpc:     barCol = Secondary(); break;
                case ConsoleChannel::Daemon:  barCol = IM_COL32(90, 130, 190, 210); break;   // node log — blue
                case ConsoleChannel::Xmrig:   barCol = Warning(); break;                     // mining — amber
                case ConsoleChannel::App:     barCol = IM_COL32(120, 190, 160, 210); break;  // app — teal
                case ConsoleChannel::Info:    barCol = OnSurfaceDisabled(); break;
                default: break;   // result / JSON roles get no bar
            }
            if (barCol != 0) {
                float barW = 3.0f * Layout::hScale();
                float barX = output_origin_.x - padX + 3.0f * Layout::hScale();
                dl->AddRectFilled(ImVec2(barX, lineOrigin.y + 1.0f),
                                  ImVec2(barX + barW, lineOrigin.y + totalH - 1.0f),
                                  barCol, barW * 0.5f);
            }
        }

        // JSON indent guides — faint vertical lines per 2-space nesting level, on result
        // body lines only (plain result + JSON syntax roles). Draw-only, like the bar.
        if (isResultBodyChannel(line.channel)) {
            size_t leading = 0;
            while (leading < line.text.size() && line.text[leading] == ' ') ++leading;
            if (leading >= 2) {
                float spaceW = font->CalcTextSizeA(fontSize, FLT_MAX, 0.0f, " ").x;
                for (size_t c = 2; c < leading; c += 2) {
                    float gx = lineOrigin.x + static_cast<float>(c) * spaceW;
                    dl->AddLine(ImVec2(gx, lineOrigin.y), ImVec2(gx, lineOrigin.y + totalH),
                                IM_COL32(255, 255, 255, 20), 1.0f);
                }
            }
        }

        // Determine byte-level selection range for this line
        int selByteStart = 0, selByteEnd = 0;
        bool lineSelected = false;
        if (selection_.active() && i >= sel_start_pos.line && i <= sel_end_pos.line) {
            lineSelected = true;
            selByteStart = (i == sel_start_pos.line) ? sel_start_pos.col : 0;
            selByteEnd   = (i == sel_end_pos.line)   ? sel_end_pos.col
                                                     : static_cast<int>(line.text.size());
        }
        
        for (const auto& seg : segs) {
            float rowY = lineOrigin.y + seg.yOffset;
            const char* segStart = line.text.c_str() + seg.byteStart;
            const char* segEnd   = line.text.c_str() + seg.byteEnd;

            if (s_scanline_enabled && line_height > 0.0f) {
                int rowIndex = static_cast<int>(std::floor((layout_.cumulativeY[vi] + seg.yOffset) / line_height + 0.5f));
                scanline_rows_.push_back({rowY, rowY + seg.height, rowIndex});
            }
            
            // Selection highlight for this sub-row
            if (lineSelected && selByteStart < seg.byteEnd && selByteEnd > seg.byteStart) {
                int hlStart = std::max(selByteStart, seg.byteStart) - seg.byteStart;
                int hlEnd   = std::min(selByteEnd,   seg.byteEnd)   - seg.byteStart;
                int segLen  = seg.byteEnd - seg.byteStart;
                
                float xStart = 0.0f;
                if (hlStart > 0) {
                    xStart = font->CalcTextSizeA(fontSize, FLT_MAX, 0,
                                                  segStart, segStart + hlStart).x;
                }
                float xEnd = font->CalcTextSizeA(fontSize, FLT_MAX, 0,
                                                  segStart, segStart + hlEnd).x;
                // Extend to window edge when selection reaches end of segment
                if (hlEnd >= segLen && selByteEnd >= static_cast<int>(line.text.size())) {
                    xEnd = std::max(xEnd + 8.0f, ImGui::GetWindowWidth());
                }
                
                dl->AddRectFilled(
                    ImVec2(lineOrigin.x + xStart, rowY),
                    ImVec2(lineOrigin.x + xEnd,   rowY + seg.height),
                    selColor);
            }
            
            // Filter match highlight (case-insensitive) within this segment.
            if (has_text_filter && !filter_lower.empty() && seg.byteStart < seg.byteEnd) {
                std::string segLower(segStart, segEnd);
                std::transform(segLower.begin(), segLower.end(), segLower.begin(),
                               [](unsigned char c) { return static_cast<char>(std::tolower(c)); });
                size_t pos = 0;
                while ((pos = segLower.find(filter_lower, pos)) != std::string::npos) {
                    float xs = font->CalcTextSizeA(fontSize, FLT_MAX, 0, segStart, segStart + static_cast<int>(pos)).x;
                    float xe = font->CalcTextSizeA(fontSize, FLT_MAX, 0, segStart,
                                                   segStart + static_cast<int>(pos + filter_lower.size())).x;
                    dl->AddRectFilled(ImVec2(lineOrigin.x + xs, rowY),
                                      ImVec2(lineOrigin.x + xe, rowY + seg.height),
                                      IM_COL32(255, 210, 0, 70));
                    pos += filter_lower.size();
                }
            }

            // Render text segment
            if (seg.byteStart < seg.byteEnd) {
                dl->AddText(font, fontSize,
                            ImVec2(lineOrigin.x, rowY),
                            channelTextColor(line.channel), segStart, segEnd);
            }
        }
        
        // Advance ImGui cursor by the total wrapped height of this line
        ImGui::Dummy(ImVec2(0, totalH));
    }
    
    // Add spacer for lines after last visible (to maintain correct content height)
    if (last_rendered_vi >= 0 && last_rendered_vi < visible_count - 1) {
        float rendered_height = (last_rendered_vi < static_cast<int>(layout_.cumulativeY.size()))
            ? layout_.cumulativeY[last_rendered_vi] + layout_.heights[last_rendered_vi]
            : 0.0f;
        float remaining_height = layout_.totalHeight - rendered_height;
        if (remaining_height > 0) {
            ImGui::Dummy(ImVec2(0, remaining_height));
        }
    }
    
    ImGui::Unindent(padX);
    ImGui::PopStyleVar();

    // Bottom padding keeps the last line above the fade-out zone.
    // Always present so that scrollMaxY stays stable when auto-scroll
    // toggles — otherwise the geometry shift clamps the user back to
    // bottom and a single scroll-up tick can't escape.
    {
        float fadeZone = std::min(Type().caption()->LegacySize * 3.0f,
                                  ImGui::GetWindowHeight() * 0.18f);
        ImGui::Dummy(ImVec2(0, fadeZone));
    }

    // Auto-scroll - when enabled, always scroll to bottom of content
    // This ensures daemon output stays visible and scrolled to bottom
    if (auto_scroll_) {
        ImGui::SetScrollHereY(1.0f);
        new_lines_since_scroll_ = 0;
    }

    // Filter indicator (text filter only — daemon toggle is already visible in toolbar)
    if (has_text_filter) {
        char filterBuf[128];
        snprintf(filterBuf, sizeof(filterBuf), TR("console_showing_lines"),
                 visible_count, model_.size());
        ImVec2 indicatorPos = ImGui::GetCursorScreenPos();
        ImGui::GetWindowDrawList()->AddText(indicatorPos,
            WithAlpha(Warning(), 180), filterBuf);
        ImGui::Dummy(ImVec2(0, ImGui::GetTextLineHeight()));
    }
    
    // Capture the hash/address under the cursor on right-click, for "Copy value".
    if (ImGui::IsMouseClicked(ImGuiMouseButton_Right)) {
        ConsoleTextPos tp = screenToTextPos(ImGui::GetMousePos());
        context_token_.clear();
        if (tp.line >= 0 && tp.line < static_cast<int>(model_.size()))
            context_token_ = extractCopyableToken(model_[tp.line].text, tp.col);
    }

    // Right-click context menu
    if (ImGui::BeginPopupContextWindow("ConsoleContextMenu")) {
        if (!context_token_.empty()) {
            std::string shortTok = context_token_.size() > 22
                ? context_token_.substr(0, 12) + "\xE2\x80\xA6" + context_token_.substr(context_token_.size() - 6)
                : context_token_;
            std::string label = std::string(TR("console_copy_value")) + " \"" + shortTok + "\"";
            if (ImGui::MenuItem(label.c_str())) {
                ImGui::SetClipboardText(context_token_.c_str());
            }
            ImGui::Separator();
        }
        if (ImGui::MenuItem(TR("copy"), "Ctrl+C", false, selection_.active())) {
            std::string selected = selectedText();
            if (!selected.empty()) {
                ImGui::SetClipboardText(selected.c_str());
            }
        }
        if (ImGui::MenuItem(TR("console_select_all"), "Ctrl+A")) {
            if (!model_.empty()) {
                selection_.selectAll(static_cast<int>(model_.size()),
                                     static_cast<int>(model_.back().text.size()));
            }
        }
        ImGui::Separator();
        if (ImGui::MenuItem(TR("console_clear_console"))) {
            // View-only clear (main thread) — drop the visible lines and the selection.
            model_.clear();
            selection_.clear();
        }
        ImGui::EndPopup();
    }

    // "New output" indicator when user is scrolled up and new lines arrived
    if (!auto_scroll_ && new_lines_since_scroll_ > 0) {
        float indicW = 140.0f;
        float indicH = 24.0f;
        ImDrawList* dlInd = ImGui::GetWindowDrawList();
        ImVec2 wMin = ImGui::GetWindowPos();
        ImVec2 wSize = ImGui::GetWindowSize();
        float ix = wMin.x + (wSize.x - indicW) * 0.5f;
        float iy = wMin.y + wSize.y - indicH - 8.0f;
        ImVec2 iMin(ix, iy);
        ImVec2 iMax(ix + indicW, iy + indicH);

        dlInd->AddRectFilled(iMin, iMax, IM_COL32(40, 40, 40, 220), 12.0f);
        dlInd->AddRect(iMin, iMax, IM_COL32(255, 218, 0, 120), 12.0f);

        char buf[48];
        snprintf(buf, sizeof(buf), TR("console_new_lines"), new_lines_since_scroll_);
        ImFont* capFont = Type().caption();
        if (!capFont) capFont = ImGui::GetFont();
        ImFont* icoFont = Type().iconSmall();
        if (!icoFont) icoFont = capFont;

        // Measure icon + text to center them together
        ImVec2 icoSz = icoFont->CalcTextSizeA(icoFont->LegacySize, FLT_MAX, 0, ICON_MD_ARROW_DOWNWARD);
        ImVec2 txtSz = capFont->CalcTextSizeA(capFont->LegacySize, FLT_MAX, 0, buf);
        float totalW = icoSz.x + txtSz.x;
        float startX = ix + (indicW - totalW) * 0.5f;
        float icoY = iy + (indicH - icoSz.y) * 0.5f;
        float txtY = iy + (indicH - txtSz.y) * 0.5f;
        ImU32 col = IM_COL32(255, 218, 0, 255);
        dlInd->AddText(icoFont, icoFont->LegacySize, ImVec2(startX, icoY), col, ICON_MD_ARROW_DOWNWARD);
        dlInd->AddText(capFont, capFont->LegacySize, ImVec2(startX + icoSz.x, txtY), col, buf);

        // Click to jump to bottom
        ImGui::SetCursorScreenPos(iMin);
        if (ImGui::InvisibleButton("##scrollToBottom", ImVec2(indicW, indicH))) {
            auto_scroll_ = true;
            new_lines_since_scroll_ = 0;
        }
    }
}

ConsoleTextPos ConsoleTab::screenToTextPos(ImVec2 screen_pos) const
{
    if (visible_indices_.empty()) return {0, 0};

    ImFontConsoleMeasure measure(ImGui::GetFont(), ImGui::GetFontSize());
    ConsoleHit hit = HitTestConsoleLayout(
        layout_, static_cast<int>(visible_indices_.size()),
        [this](int vi) -> const std::string& { return model_[visible_indices_[vi]].text; },
        screen_pos.x - output_origin_.x, screen_pos.y - output_origin_.y, measure);

    ConsoleTextPos pos;
    pos.line = visible_indices_[hit.visibleRow];
    pos.col = hit.col;
    return pos;
}

std::string ConsoleTab::selectedText() const
{
    return selection_.extract(
        static_cast<int>(model_.size()),
        [this](int i) -> const std::string& { return model_[i].text; },
        visible_indices_);
}

void ConsoleTab::renderInput(ConsoleCommandExecutor& exec)
{
    using namespace material;
    
    // Glass panel for input area
    ImDrawList* dlIn = ImGui::GetWindowDrawList();
    float inputPanelH = ImGui::GetFrameHeightWithSpacing() + Layout::spacingSm() + Layout::spacingXs();
    ImVec2 inMin = ImGui::GetCursorScreenPos();
    ImVec2 inMax(inMin.x + ImGui::GetContentRegionAvail().x, inMin.y + inputPanelH);
    GlassPanelSpec inGlass;
    inGlass.rounding = Layout::glassRounding();
    inGlass.fillAlpha = 12;
    material::DrawGlassPanel(dlIn, inMin, inMax, inGlass);
    
    // Center content vertically within glass panel
    float inputFrameH = ImGui::GetFrameHeight();
    ImGui::SetCursorPosY(ImGui::GetCursorPosY() + (inputPanelH - inputFrameH) * 0.5f);
    ImGui::SetCursorPosX(ImGui::GetCursorPosX() + Layout::spacingMd());



    // Input field
    ImGui::PushItemWidth(-Layout::spacingMd());
    
    ImGuiInputTextFlags flags = ImGuiInputTextFlags_EnterReturnsTrue |
                                 ImGuiInputTextFlags_CallbackHistory |
                                 ImGuiInputTextFlags_CallbackCompletion;
    
    bool reclaim_focus = false;
    
    auto callback = [](ImGuiInputTextCallbackData* data) -> int {
        ConsoleTab* console = static_cast<ConsoleTab*>(data->UserData);
        
        if (data->EventFlag == ImGuiInputTextFlags_CallbackHistory) {
            // Handle history navigation
            if (console->command_history_.empty()) return 0;
            
            int prev_index = console->history_index_;
            console->history_index_ = NavigateConsoleHistoryIndex(
                console->history_index_,
                console->command_history_.size(),
                data->EventKey == ImGuiKey_UpArrow);
            
            if (prev_index != console->history_index_) {
                std::string history = ConsoleHistoryEntry(console->command_history_, console->history_index_);
                data->DeleteChars(0, data->BufTextLen);
                data->InsertChars(0, history.c_str());
            }
        }
        else if (data->EventFlag == ImGuiInputTextFlags_CallbackCompletion) {
            std::string input(data->Buf);
            if (!input.empty()) {
                auto completion = CompleteConsoleCommand(input);
                
                if (completion.matches.size() == 1) {
                    // Single match — complete it
                    data->DeleteChars(0, data->BufTextLen);
                    data->InsertChars(0, completion.matches.front().c_str());
                } else if (completion.matches.size() > 1) {
                    // Multiple matches — show list in console and complete common prefix
                    console->addLine(TR("console_completions"), ConsoleChannel::Info);
                    for (const auto& line : FormatConsoleCompletionLines(completion.matches)) {
                        console->addLine(line, ConsoleChannel::None);
                    }
                    
                    // Complete to longest common prefix
                    if (completion.commonPrefix.length() > input.length()) {
                        data->DeleteChars(0, data->BufTextLen);
                        data->InsertChars(0, completion.commonPrefix.c_str());
                    }
                }
            }
        }
        
        return 0;
    };
    
    const bool busy = exec.busy();
    if (busy) ImGui::BeginDisabled();
    if (ImGui::InputText("##ConsoleInput", input_buffer_, sizeof(input_buffer_), flags, callback, this)) {
        std::string cmd(input_buffer_);
        // Trim surrounding whitespace.
        size_t tb = cmd.find_first_not_of(" \t");
        if (tb == std::string::npos) cmd.clear(); else cmd = cmd.substr(tb);
        while (!cmd.empty() && (cmd.back() == ' ' || cmd.back() == '\t')) cmd.pop_back();

        if (!cmd.empty()) {
            addLine("> " + cmd, ConsoleChannel::Command);
            AppendConsoleHistory(command_history_, cmd, 100);
            history_index_ = -1;

            // First token, lowercased, for built-in interception.
            std::string first;
            {
                size_t fb = cmd.find_first_not_of(" \t");
                size_t fe = cmd.find_first_of(" \t", fb);
                first = cmd.substr(fb, fe == std::string::npos ? std::string::npos : fe - fb);
                std::transform(first.begin(), first.end(), first.begin(),
                               [](unsigned char c) { return static_cast<char>(std::tolower(c)); });
            }
            auto add = [this](const std::string& l, ConsoleChannel c) { addLine(l, c); };
            if (first == "clear" || first == "cls") {
                // View-only clear — NEVER forwarded (the lite backend's `clear` wipes tx history).
                clear();
                selection_.clear();
            } else if (first == "help") {
                exec.printHelp(add);
            } else if (first == "quit" || first == "exit") {
                addLine(TR("console_quit_note"), ConsoleChannel::Info);
            } else if (!exec.isReady()) {
                addLine(TR("console_not_connected"), ConsoleChannel::Error);
            } else {
                exec.submit(cmd);
            }
            input_buffer_[0] = '\0';
            reclaim_focus = true;
        }
    }
    if (busy) ImGui::EndDisabled();

    ImGui::PopItemWidth();

    // Auto-focus on input
    if (reclaim_focus) {
        ImGui::SetKeyboardFocusHere(-1);
    }
}

void ConsoleTab::renderCommandsPopup()
{
    using namespace material;
    
    float popW = std::min(schema::UI().drawElement("tabs.console", "popup-max-width").size, ImGui::GetMainViewport()->Size.x * schema::UI().drawElement("tabs.console", "popup-width-ratio").size);
    if (!material::BeginOverlayDialog(TR("console_rpc_reference"), &show_commands_popup_, popW, 0.94f)) {
        return;
    }

    Type().text(TypeStyle::H6, TR("console_rpc_reference"));
    ImGui::Dummy(ImVec2(0, Layout::spacingSm()));
    
    // Search filter
    static char cmdFilter[128] = {0};
    ImGui::SetNextItemWidth(-1);
    ImGui::InputTextWithHint("##CmdSearch", TR("console_search_commands"), cmdFilter, sizeof(cmdFilter));
    ImGui::Dummy(ImVec2(0, Layout::spacingXs()));
    
    const auto& categories = consoleCommandCategories();
    
    std::string filter(cmdFilter);
    std::transform(filter.begin(), filter.end(), filter.begin(), ::tolower);
    
    ImGui::BeginChild("CmdListScroll", ImVec2(0, -ImGui::GetFrameHeightWithSpacing() - Layout::spacingXs()),
                      false);
    
    ImGui::PushFont(Type().caption());
    
    float cmdMinWidth = schema::UI().drawElement("tabs.console", "cmd-min-width").sizeOr(500.0f);
    float popupInnerW = ImGui::GetContentRegionAvail().x;
    bool showParams = popupInnerW >= cmdMinWidth;
    int catIdx = 0;

    for (const auto& cat : categories) {
        // Count matching commands in this category
        int matchCount = 0;
        if (filter.empty()) {
            matchCount = cat.count;
        } else {
            for (int i = 0; i < cat.count; i++) {
                std::string name(cat.commands[i].name);
                std::string desc(cat.commands[i].desc);
                std::string params(cat.commands[i].params);
                std::transform(name.begin(), name.end(), name.begin(), ::tolower);
                std::transform(desc.begin(), desc.end(), desc.begin(), ::tolower);
                std::transform(params.begin(), params.end(), params.begin(), ::tolower);
                if (name.find(filter) != std::string::npos ||
                    desc.find(filter) != std::string::npos ||
                    params.find(filter) != std::string::npos) {
                    matchCount++;
                }
            }
        }
        if (matchCount == 0) { catIdx++; continue; }

        // Default-open only the first category (Control); collapse the rest
        ImGuiTreeNodeFlags headerFlags = (catIdx == 0) ? ImGuiTreeNodeFlags_DefaultOpen : 0;
        // When filtering, open all matching categories
        if (!filter.empty()) headerFlags = ImGuiTreeNodeFlags_DefaultOpen;

        ImGui::PushStyleColor(ImGuiCol_Text, ImGui::ColorConvertU32ToFloat4(Primary()));
        // Show match count badge when filtering
        char headerLabel[128];
        if (!filter.empty()) {
            snprintf(headerLabel, sizeof(headerLabel), "%s  (%d)", cat.name, matchCount);
        } else {
            snprintf(headerLabel, sizeof(headerLabel), "%s", cat.name);
        }
        bool open = ImGui::CollapsingHeader(headerLabel, headerFlags);
        ImGui::PopStyleColor();
        catIdx++;
        
        if (open) {
            float nameColW = schema::UI().drawElement("tabs.console", "cmd-name-col-width").size * Layout::hScale();
            float paramsColW = schema::UI().drawElement("tabs.console", "cmd-params-col-width").size * Layout::hScale();
            int numCols = showParams ? 3 : 2;
            if (ImGui::BeginTable("##cmds", numCols, ImGuiTableFlags_None)) {
                ImGui::TableSetupColumn("Name", ImGuiTableColumnFlags_WidthFixed, nameColW);
                if (showParams)
                    ImGui::TableSetupColumn("Parameters", ImGuiTableColumnFlags_WidthFixed, paramsColW);
                ImGui::TableSetupColumn("Desc", ImGuiTableColumnFlags_WidthStretch);
                
                for (int i = 0; i < cat.count; i++) {
                    const auto& cmd = cat.commands[i];
                    std::string nameLower(cmd.name);
                    std::string descLower(cmd.desc);
                    std::string paramsLower(cmd.params);
                    std::transform(nameLower.begin(), nameLower.end(), nameLower.begin(), ::tolower);
                    std::transform(descLower.begin(), descLower.end(), descLower.begin(), ::tolower);
                    std::transform(paramsLower.begin(), paramsLower.end(), paramsLower.begin(), ::tolower);
                    
                    if (!filter.empty() &&
                        nameLower.find(filter) == std::string::npos &&
                        descLower.find(filter) == std::string::npos &&
                        paramsLower.find(filter) == std::string::npos) {
                        continue;
                    }
                    
                    ImGui::TableNextRow();
                    ImGui::TableNextColumn();
                    ImGui::PushStyleColor(ImGuiCol_Text,
                        ImGui::ColorConvertU32ToFloat4(IM_COL32(100, 180, 255, 255)));
                    ImGui::PushStyleColor(ImGuiCol_Header, ImVec4(0, 0, 0, 0));
                    ImGui::PushStyleColor(ImGuiCol_HeaderHovered, ImVec4(0.2f, 0.4f, 0.6f, 0.3f));
                    char selId[128];
                    snprintf(selId, sizeof(selId), "%s##cmdRef", cmd.name);
                    if (ImGui::Selectable(selId, false)) {
                        if (cmd.params[0] != '\0') {
                            snprintf(input_buffer_, sizeof(input_buffer_), "%s %s", cmd.name, cmd.params);
                        } else {
                            strncpy(input_buffer_, cmd.name, sizeof(input_buffer_) - 1);
                            input_buffer_[sizeof(input_buffer_) - 1] = '\0';
                        }
                        ImGui::CloseCurrentPopup();
                    }
                    if (ImGui::IsItemHovered()) {
                        ImGui::SetMouseCursor(ImGuiMouseCursor_Hand);
                        if (cmd.params[0] != '\0')
                            material::Tooltip(TR("console_click_insert_params"), cmd.name, cmd.params);
                        else
                            material::Tooltip(TR("console_click_insert"), cmd.name);
                    }
                    ImGui::PopStyleColor(3);
                    if (showParams) {
                        ImGui::TableNextColumn();
                        // Style optional params [param] in dimmed text
                        const char* p = cmd.params;
                        bool first = true;
                        while (*p) {
                            const char* bracketStart = strchr(p, '[');
                            if (bracketStart) {
                                // Draw required part before bracket
                                if (bracketStart > p) {
                                    if (!first) ImGui::SameLine(0, 0);
                                    std::string req(p, bracketStart);
                                    ImGui::TextColored(
                                        ImGui::ColorConvertU32ToFloat4(OnSurfaceDisabled()),
                                        "%s", req.c_str());
                                    first = false;
                                }
                                // Find matching ]
                                const char* bracketEnd = strchr(bracketStart, ']');
                                if (bracketEnd) {
                                    if (!first) ImGui::SameLine(0, 0);
                                    std::string opt(bracketStart, bracketEnd + 1);
                                    ImGui::TextColored(
                                        ImGui::ColorConvertU32ToFloat4(OnSurfaceMedium()),
                                        "%s", opt.c_str());
                                    first = false;
                                    p = bracketEnd + 1;
                                } else {
                                    if (!first) ImGui::SameLine(0, 0);
                                    ImGui::TextColored(
                                        ImGui::ColorConvertU32ToFloat4(OnSurfaceDisabled()),
                                        "%s", bracketStart);
                                    first = false;
                                    break;
                                }
                            } else {
                                if (!first) ImGui::SameLine(0, 0);
                                ImGui::TextColored(
                                    ImGui::ColorConvertU32ToFloat4(OnSurfaceDisabled()),
                                    "%s", p);
                                first = false;
                                break;
                            }
                        }
                    }
                    ImGui::TableNextColumn();
                    ImGui::TextColored(
                        ImGui::ColorConvertU32ToFloat4(OnSurfaceMedium()),
                        "%s", cmd.desc);
                }
                
                ImGui::EndTable();
            }
            ImGui::Spacing();
        }
    }
    
    ImGui::PopFont();
    ImGui::EndChild();
    
    ImGui::Dummy(ImVec2(0, Layout::spacingXs()));
    
    // Close button
    if (ImGui::Button(TR("console_close"), ImVec2(-1, 0))) {
        cmdFilter[0] = '\0';
        show_commands_popup_ = false;
    }
    
    material::EndOverlayDialog();
}

void ConsoleTab::addFormattedResult(const std::string& result, bool is_error)
{
    for (const auto& resultLine : FormatConsoleRpcResultLines(result, is_error)) {
        ConsoleChannel channel = ConsoleChannel::None;
        switch (resultLine.role) {
            case ConsoleResultLineRole::Error:      channel = ConsoleChannel::Error; break;
            case ConsoleResultLineRole::JsonKey:    channel = ConsoleChannel::JsonKey; break;
            case ConsoleResultLineRole::JsonString: channel = ConsoleChannel::JsonString; break;
            case ConsoleResultLineRole::JsonNumber: channel = ConsoleChannel::JsonNumber; break;
            case ConsoleResultLineRole::JsonBrace:  channel = ConsoleChannel::JsonBrace; break;
            case ConsoleResultLineRole::Result: break;
        }
        addLine(resultLine.text, channel);
    }
}

void ConsoleTab::renderStatusHeader(ConsoleCommandExecutor& exec)
{
    using namespace material;
    auto lines = exec.statusLines();
    for (const auto& sl : lines)
        Type().textColored(TypeStyle::Caption, sl.color, sl.text.c_str());
    if (!lines.empty()) ImGui::Dummy(ImVec2(0, Layout::spacingXs()));
}

void ConsoleTab::addLine(const std::string& line, ConsoleChannel channel)
{
    // The channel is the canonical semantic key — text color and the left accent bar are
    // both derived from it at draw time (channelTextColor / the bar switch). Sources emit
    // clean text (no "[daemon]"/"[xmrig]"/"[app]"/"[rpc]" prefix); the bar carries origin.
    //
    // ingest() is thread-safe, so this is callable from the RPC-trace / app-logger worker
    // threads. The line becomes visible on the next render() drain (main thread), where the
    // line-cap eviction and selection/scroll bookkeeping happen — none of the UI-only state
    // is touched here, so there is no cross-thread access to it.
    model_.ingest(line, channel);
}

void ConsoleTab::drainModel()
{
    const ConsoleModel::DrainResult dr = model_.drain();
    if (dr.added == 0) return;

    // Lines evicted from the front by the cap shift every index down — move the selection
    // with them so the highlight stays on the text the user selected.
    selection_.shiftForEviction(static_cast<int>(dr.popped));

    // Track new output that arrived while the user is scrolled up (for the indicator).
    if (!auto_scroll_)
        new_lines_since_scroll_ += static_cast<int>(dr.added);
}

void ConsoleTab::addRpcTraceLine(const std::string& source, const std::string& method)
{
    // The Rpc channel supplies the accent bar + color; no "[rpc] " text prefix needed.
    addLine("[" + rpcTraceTimestamp() + "] [" + source + "] " + method, ConsoleChannel::Rpc);
}

void ConsoleTab::clear()
{
    // View-only clear (main thread). The executor keeps its own log cursors, so new output
    // still appends. The "cleared" line is ingested and appears on the next frame's drain.
    model_.clear();
    addLine(TR("console_cleared"), ConsoleChannel::Info);
}

} // namespace ui
} // namespace dragonx