// DragonX Wallet - ImGui Edition
// Copyright 2024-2026 The Hush Developers
// Released under the GPLv3
//
// Layout G: QR-Centered Hero
// - QR code dominates center as hero element
// - Address info wraps around the QR
// - Payment request section below QR
// - Horizontal address strip at bottom for fast switching

#include "receive_tab.h"
#include "send_tab.h"
#include "../../app.h"
#include "../../version.h"
#include "../../wallet_state.h"
#include "../../ui/widgets/qr_code.h"
#include "../sidebar.h"
#include "../layout.h"
#include "../schema/ui_schema.h"
#include "../material/type.h"
#include "../material/draw_helpers.h"
#include "../material/colors.h"
#include "../notifications.h"
#include "imgui.h"

#include <string>
#include <algorithm>
#include <cmath>
#include <map>

namespace dragonx {
namespace ui {

using namespace material;

// ============================================================================
// State
// ============================================================================
static int s_selected_address_idx = -1;
static double s_request_amount = 0.0;
static char s_request_memo[256] = "";
static std::string s_cached_qr_data;
static uintptr_t s_qr_texture = 0;
static bool s_payment_request_open = false;

// Track newly created addresses for NEW badge
static std::map<std::string, double> s_new_address_timestamps;
static size_t s_prev_address_count = 0;

// Address labels (in-memory until persistent config)
static std::map<std::string, std::string> s_address_labels;
static char s_label_edit_buf[64] = "";

// Address type filter
static int s_addr_type_filter = 0; // 0=All, 1=Z, 2=T

// ============================================================================
// Helpers
// ============================================================================
static std::string TruncateAddress(const std::string& addr, size_t maxLen = 35) {
    if (addr.length() <= maxLen) return addr;
    size_t halfLen = (maxLen - 3) / 2;
    return addr.substr(0, halfLen) + "..." + addr.substr(addr.length() - halfLen);
}

static void OpenExplorerURL(const std::string& address) {
    std::string url = "https://explorer.dragonx.com/address/" + address;
#ifdef _WIN32
    std::string cmd = "start \"\" \"" + url + "\"";
#elif __APPLE__
    std::string cmd = "open \"" + url + "\"";
#else
    std::string cmd = "xdg-open \"" + url + "\"";
#endif
    system(cmd.c_str());
}

// ============================================================================
// Sync banner
// ============================================================================
static void RenderSyncBanner(const WalletState& state) {
    if (!state.sync.syncing || state.sync.isSynced()) return;

    float syncPct = (state.sync.headers > 0)
        ? (float)state.sync.blocks / state.sync.headers * 100.0f : 0.0f;
    char syncBuf[128];
    snprintf(syncBuf, sizeof(syncBuf),
        "Blockchain syncing (%.1f%%)... Balances may be inaccurate.", syncPct);
    ImGui::PushStyleColor(ImGuiCol_ChildBg, ImVec4(0.6f, 0.4f, 0.0f, 0.15f));
    ImGui::BeginChild("##SyncBannerRecv", ImVec2(ImGui::GetContentRegionAvail().x, 28),
        false, ImGuiWindowFlags_NoScrollbar);
    ImGui::SetCursorPos(ImVec2(Layout::spacingLg(), 6));
    Type().textColored(TypeStyle::Caption, Warning(), syncBuf);
    ImGui::EndChild();
    ImGui::PopStyleColor();
}

// ============================================================================
// Track new addresses (detect creations)
// ============================================================================
static void TrackNewAddresses(const WalletState& state) {
    if (state.addresses.size() > s_prev_address_count && s_prev_address_count > 0) {
        for (const auto& a : state.addresses) {
            if (s_new_address_timestamps.find(a.address) == s_new_address_timestamps.end()) {
                s_new_address_timestamps[a.address] = ImGui::GetTime();
            }
        }
    } else if (s_prev_address_count == 0) {
        for (const auto& a : state.addresses) {
            s_new_address_timestamps[a.address] = 0.0;
        }
    }
    s_prev_address_count = state.addresses.size();
}

// ============================================================================
// Build sorted address groups
// ============================================================================
struct AddressGroups {
    std::vector<int> shielded;
    std::vector<int> transparent;
};

static AddressGroups BuildSortedAddressGroups(const WalletState& state) {
    AddressGroups groups;
    for (int i = 0; i < (int)state.addresses.size(); i++) {
        if (state.addresses[i].type == "shielded")
            groups.shielded.push_back(i);
        else
            groups.transparent.push_back(i);
    }
    std::sort(groups.shielded.begin(), groups.shielded.end(), [&](int a, int b) {
        return state.addresses[a].balance > state.addresses[b].balance;
    });
    std::sort(groups.transparent.begin(), groups.transparent.end(), [&](int a, int b) {
        return state.addresses[a].balance > state.addresses[b].balance;
    });
    return groups;
}

// ============================================================================
// QR Hero — the centerpiece of Layout G
// ============================================================================
static void RenderQRHero(App* app, ImDrawList* dl, const AddressInfo& addr,
                         float width, float qrSize,
                         const std::string& qr_data,
                         const GlassPanelSpec& glassSpec,
                         const WalletState& state,
                         ImFont* sub1, ImFont* /*body2*/, ImFont* capFont) {
    char buf[128];
    bool isZ = addr.type == "shielded";
    ImU32 typeCol = isZ ? IM_COL32(77, 204, 77, 255) : IM_COL32(204, 170, 51, 255);
    const char* typeBadge = isZ ? "Shielded" : "Transparent";

    float qrPadding = Layout::spacingLg();
    float totalQrSize = qrSize + qrPadding * 2;
    float heroH = totalQrSize + 80.0f; // QR + info below

    ImVec2 heroMin = ImGui::GetCursorScreenPos();
    ImVec2 heroMax(heroMin.x + width, heroMin.y + heroH);
    GlassPanelSpec heroGlass = glassSpec;
    heroGlass.fillAlpha = 16;
    heroGlass.borderAlpha = 35;
    DrawGlassPanel(dl, heroMin, heroMax, heroGlass);

    // --- Address info bar above QR ---
    float infoBarH = 32.0f;
    float cx = heroMin.x + Layout::spacingLg();
    float cy = heroMin.y + Layout::spacingSm();

    // Type badge circle + label
    dl->AddCircleFilled(ImVec2(cx + 8, cy + 10), 8.0f, IM_COL32(255, 255, 255, 20));
    const char* typeChar = isZ ? "Z" : "T";
    ImVec2 tcSz = sub1->CalcTextSizeA(sub1->LegacySize, 100, 0, typeChar);
    dl->AddText(sub1, sub1->LegacySize,
                ImVec2(cx + 8 - tcSz.x * 0.5f, cy + 10 - tcSz.y * 0.5f),
                typeCol, typeChar);

    // Education tooltip on badge
    ImGui::SetCursorScreenPos(ImVec2(cx, cy));
    ImGui::InvisibleButton("##TypeBadgeHero", ImVec2(22, 22));
    if (ImGui::IsItemHovered()) {
        if (isZ) {
            ImGui::SetTooltip(
                "Shielded Address (Z)\n"
                "- Full transaction privacy\n"
                "- Encrypted sender, receiver, amount\n"
                "- Supports encrypted memos\n"
                "- Recommended for privacy");
        } else {
            ImGui::SetTooltip(
                "Transparent Address (T)\n"
                "- Publicly visible on blockchain\n"
                "- Similar to Bitcoin addresses\n"
                "- No memo support\n"
                "- Use Z addresses for privacy");
        }
    }

    // Type label text
    dl->AddText(capFont, capFont->LegacySize, ImVec2(cx + 24, cy + 4), typeCol, typeBadge);

    // Balance right-aligned
    snprintf(buf, sizeof(buf), "%.8f %s", addr.balance, DRAGONX_TICKER);
    ImVec2 balSz = sub1->CalcTextSizeA(sub1->LegacySize, 10000, 0, buf);
    float balX = heroMax.x - balSz.x - Layout::spacingLg();
    DrawTextShadow(dl, sub1, sub1->LegacySize, ImVec2(balX, cy + 2), typeCol, buf);

    // USD value
    if (state.market.price_usd > 0 && addr.balance > 0) {
        double usd = addr.balance * state.market.price_usd;
        snprintf(buf, sizeof(buf), "\xe2\x89\x88 $%.2f", usd);
        ImVec2 usdSz = capFont->CalcTextSizeA(capFont->LegacySize, 10000, 0, buf);
        dl->AddText(capFont, capFont->LegacySize,
                    ImVec2(heroMax.x - usdSz.x - Layout::spacingLg(), cy + sub1->LegacySize + 4),
                    OnSurfaceDisabled(), buf);
    }

    // --- QR Code centered ---
    float qrOffset = (width - totalQrSize) * 0.5f;
    ImVec2 qrPanelMin(heroMin.x + qrOffset, heroMin.y + infoBarH + Layout::spacingSm());
    ImVec2 qrPanelMax(qrPanelMin.x + totalQrSize, qrPanelMin.y + totalQrSize);

    // Subtle inner panel for QR
    GlassPanelSpec qrGlass;
    qrGlass.rounding = glassSpec.rounding * 0.75f;
    qrGlass.fillAlpha = 12;
    qrGlass.borderAlpha = 25;
    DrawGlassPanel(dl, qrPanelMin, qrPanelMax, qrGlass);

    ImGui::SetCursorScreenPos(ImVec2(qrPanelMin.x + qrPadding, qrPanelMin.y + qrPadding));
    if (s_qr_texture) {
        RenderQRCode(s_qr_texture, qrSize);
    } else {
        ImGui::Dummy(ImVec2(qrSize, qrSize));
        ImVec2 textPos(qrPanelMin.x + totalQrSize * 0.5f - 50,
                       qrPanelMin.y + totalQrSize * 0.5f);
        dl->AddText(capFont, capFont->LegacySize, textPos,
                    OnSurfaceDisabled(), "QR unavailable");
    }

    // Click QR to copy
    ImGui::SetCursorScreenPos(qrPanelMin);
    ImGui::InvisibleButton("##QRClickCopy", ImVec2(totalQrSize, totalQrSize));
    if (ImGui::IsItemHovered()) {
        ImGui::SetMouseCursor(ImGuiMouseCursor_Hand);
        ImGui::SetTooltip("Click to copy %s",
            s_request_amount > 0 ? "payment URI" : "address");
    }
    if (ImGui::IsItemClicked()) {
        ImGui::SetClipboardText(qr_data.c_str());
        Notifications::instance().info(s_request_amount > 0
            ? "Payment URI copied to clipboard"
            : "Address copied to clipboard");
    }

    // --- Address strip below QR ---
    float addrStripY = qrPanelMax.y + Layout::spacingMd();
    float addrStripX = heroMin.x + Layout::spacingLg();
    float addrStripW = width - Layout::spacingXxl();

    // Full address (word-wrapped)
    ImVec2 fullAddrPos(addrStripX, addrStripY);
    float wrapWidth = addrStripW;
    ImVec2 addrSz = capFont->CalcTextSizeA(capFont->LegacySize, FLT_MAX,
                                             wrapWidth, addr.address.c_str());
    dl->AddText(capFont, capFont->LegacySize, fullAddrPos,
                OnSurface(), addr.address.c_str(), nullptr, wrapWidth);

    // Address click-to-copy overlay
    ImGui::SetCursorScreenPos(fullAddrPos);
    ImGui::InvisibleButton("##addrCopyHero", ImVec2(wrapWidth, addrSz.y));
    if (ImGui::IsItemHovered()) {
        ImGui::SetMouseCursor(ImGuiMouseCursor_Hand);
        ImGui::SetTooltip("Click to copy address");
    }
    if (ImGui::IsItemClicked()) {
        ImGui::SetClipboardText(addr.address.c_str());
        Notifications::instance().info("Address copied to clipboard");
    }

    // Action buttons row
    float btnRowY = addrStripY + addrSz.y + Layout::spacingMd();
    ImGui::SetCursorScreenPos(ImVec2(addrStripX, btnRowY));
    ImGui::PushStyleVar(ImGuiStyleVar_FrameRounding, Layout::spacingSm());
    {
        // Copy — primary (uses global glass style)
        if (TactileSmallButton("Copy Address##hero", schema::UI().resolveFont("button"))) {
            ImGui::SetClipboardText(addr.address.c_str());
            Notifications::instance().info("Address copied to clipboard");
        }

        ImGui::SameLine();

        // Explorer
        ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(0, 0, 0, 0));
        ImGui::PushStyleColor(ImGuiCol_ButtonHovered,
            ImGui::ColorConvertU32ToFloat4(IM_COL32(255, 255, 255, 15)));
        ImGui::PushStyleColor(ImGuiCol_Text, ImGui::ColorConvertU32ToFloat4(PrimaryLight()));
        if (TactileSmallButton("Explorer##hero", schema::UI().resolveFont("button"))) {
            OpenExplorerURL(addr.address);
        }
        ImGui::PopStyleColor(3);

        // Send From
        if (addr.balance > 0) {
            ImGui::SameLine();
            ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(0, 0, 0, 0));
            ImGui::PushStyleColor(ImGuiCol_ButtonHovered,
                ImGui::ColorConvertU32ToFloat4(IM_COL32(255, 255, 255, 15)));
            ImGui::PushStyleColor(ImGuiCol_Text, ImGui::ColorConvertU32ToFloat4(OnSurfaceMedium()));
            if (TactileSmallButton("Send \xe2\x86\x97##hero", schema::UI().resolveFont("button"))) {
                SetSendFromAddress(addr.address);
                app->setCurrentPage(NavPage::Send);
            }
            ImGui::PopStyleColor(3);
        }

        // Label editor (inline)
        ImGui::SameLine(0, Layout::spacingXl());
        auto lblIt = s_address_labels.find(addr.address);
        std::string currentLabel = (lblIt != s_address_labels.end()) ? lblIt->second : "";
        snprintf(s_label_edit_buf, sizeof(s_label_edit_buf), "%s", currentLabel.c_str());
        ImGui::SetNextItemWidth(std::min(200.0f, addrStripW * 0.3f));
        if (ImGui::InputTextWithHint("##LabelHero", "Add label...",
                                      s_label_edit_buf, sizeof(s_label_edit_buf))) {
            s_address_labels[addr.address] = std::string(s_label_edit_buf);
        }
    }
    ImGui::PopStyleVar();

    // Update hero height based on actual content
    float actualBottom = btnRowY + 24;
    heroH = actualBottom - heroMin.y + Layout::spacingMd();
    heroMax.y = heroMin.y + heroH;

    ImGui::SetCursorScreenPos(ImVec2(heroMin.x, heroMax.y));
    ImGui::Dummy(ImVec2(width, 0));
}

// ============================================================================
// Payment request section (below QR hero)
// ============================================================================
static void RenderPaymentRequest(ImDrawList* dl, const AddressInfo& addr,
                                 float innerW, const GlassPanelSpec& glassSpec,
                                 const char* suffix) {
    auto& S = schema::UI();
    const float kLabelPos = S.label("tabs.receive", "label-column").position;
    bool hasMemo = (addr.type == "shielded");

    Type().textColored(TypeStyle::Overline, OnSurfaceMedium(), "PAYMENT REQUEST");
    ImGui::Dummy(ImVec2(0, Layout::spacingSm()));

    // Compute card height
    float prCardH = 16.0f + 24.0f + 8.0f + 12.0f;
    if (hasMemo) prCardH += 24.0f;
    if (s_request_amount > 0 && !s_cached_qr_data.empty()) {
        ImFont* capF = Type().caption();
        ImVec2 uriSz = capF->CalcTextSizeA(capF->LegacySize, FLT_MAX,
                                             innerW - 24, s_cached_qr_data.c_str());
        prCardH += uriSz.y + 8.0f;
    }
    if (s_request_amount > 0) prCardH += 32.0f;
    if (s_request_amount > 0 || s_request_memo[0]) prCardH += 4.0f;

    ImVec2 prMin = ImGui::GetCursorScreenPos();
    ImVec2 prMax(prMin.x + innerW, prMin.y + prCardH);
    DrawGlassPanel(dl, prMin, prMax, glassSpec);

    ImGui::SetCursorScreenPos(ImVec2(prMin.x + Layout::spacingLg(), prMin.y + Layout::spacingMd()));
    ImGui::Dummy(ImVec2(0, 0));

    ImGui::Text("Amount:");
    ImGui::SameLine(kLabelPos);
    ImGui::SetNextItemWidth(std::max(S.input("tabs.receive", "amount-input").width, innerW * 0.4f));
    char amtId[32];
    snprintf(amtId, sizeof(amtId), "##RequestAmount%s", suffix);
    ImGui::InputDouble(amtId, &s_request_amount, 0.01, 1.0, "%.8f");
    ImGui::SameLine();
    ImGui::Text("%s", DRAGONX_TICKER);

    if (hasMemo) {
        ImGui::Text("Memo:");
        ImGui::SameLine(kLabelPos);
        ImGui::SetNextItemWidth(innerW - kLabelPos - Layout::spacingXxl());
        char memoId[32];
        snprintf(memoId, sizeof(memoId), "##RequestMemo%s", suffix);
        ImGui::InputText(memoId, s_request_memo, sizeof(s_request_memo));
    }

    // Live URI preview
    if (s_request_amount > 0 && !s_cached_qr_data.empty()) {
        ImGui::Spacing();
        ImFont* capF = Type().caption();
        ImVec2 uriPos = ImGui::GetCursorScreenPos();
        float uriWrapW = innerW - Layout::spacingXxl();
        ImVec2 uriSz = capF->CalcTextSizeA(capF->LegacySize, FLT_MAX,
                                             uriWrapW, s_cached_qr_data.c_str());
        dl->AddText(capF, capF->LegacySize, uriPos,
                    OnSurfaceDisabled(), s_cached_qr_data.c_str(), nullptr, uriWrapW);
        ImGui::Dummy(ImVec2(uriWrapW, uriSz.y + Layout::spacingSm()));
    }

    ImGui::Spacing();
    if (s_request_amount > 0) {
        ImGui::PushStyleVar(ImGuiStyleVar_FrameRounding, Layout::spacingSm());
        char copyUriId[64];
        snprintf(copyUriId, sizeof(copyUriId), "Copy Payment URI%s", suffix);
        if (TactileButton(copyUriId, ImVec2(innerW - Layout::spacingXxl(), 0), S.resolveFont("button"))) {
            ImGui::SetClipboardText(s_cached_qr_data.c_str());
            Notifications::instance().info("Payment URI copied to clipboard");
        }
        ImGui::PopStyleVar();

        // Share as text
        char shareId[32];
        snprintf(shareId, sizeof(shareId), "Share as Text%s", suffix);
        if (TactileSmallButton(shareId, S.resolveFont("button"))) {
            char shareBuf[1024];
            snprintf(shareBuf, sizeof(shareBuf),
                "Payment Request\nAmount: %.8f %s\nAddress: %s\nURI: %s",
                s_request_amount, DRAGONX_TICKER,
                addr.address.c_str(), s_cached_qr_data.c_str());
            ImGui::SetClipboardText(shareBuf);
            Notifications::instance().info("Payment request copied to clipboard");
        }
    }
    if (s_request_amount > 0 || s_request_memo[0]) {
        ImGui::SameLine();
        char clearId[32];
        snprintf(clearId, sizeof(clearId), "Clear%s", suffix);
        if (TactileSmallButton(clearId, S.resolveFont("button"))) {
            s_request_amount = 0.0;
            s_request_memo[0] = '\0';
        }
    }

    ImGui::SetCursorScreenPos(ImVec2(prMin.x, prMax.y));
    ImGui::Dummy(ImVec2(innerW, 0));
}

// ============================================================================
// Recent received transactions for selected address
// ============================================================================
static void RenderRecentReceived(ImDrawList* dl, const AddressInfo& addr,
                                 const WalletState& state, float width,
                                 ImFont* capFont) {
    char buf[128];
    int recvCount = 0;
    for (const auto& tx : state.transactions) {
        if (tx.address == addr.address && tx.type == "receive") recvCount++;
    }
    if (recvCount == 0) return;

    ImGui::Dummy(ImVec2(0, Layout::spacingMd()));
    snprintf(buf, sizeof(buf), "RECENT RECEIVED (%d)", std::min(recvCount, 3));
    Type().textColored(TypeStyle::Overline, OnSurfaceMedium(), buf);
    ImGui::Dummy(ImVec2(0, Layout::spacingXs()));

    int shown = 0;
    for (const auto& tx : state.transactions) {
        if (tx.address != addr.address || tx.type != "receive") continue;
        if (shown >= 3) break;

        ImVec2 rMin = ImGui::GetCursorScreenPos();
        float rH = 22.0f;
        ImVec2 rMax(rMin.x + width, rMin.y + rH);
        GlassPanelSpec rsGlass;
        rsGlass.rounding = Layout::glassRounding() * 0.5f;
        rsGlass.fillAlpha = 8;
        DrawGlassPanel(dl, rMin, rMax, rsGlass);

        float rx = rMin.x + Layout::spacingMd();
        float ry = rMin.y + (rH - capFont->LegacySize) * 0.5f;

        // Arrow indicator
        dl->AddText(capFont, capFont->LegacySize, ImVec2(rx, ry),
                    Success(), "\xe2\x86\x90");

        snprintf(buf, sizeof(buf), "+%.8f %s  %s  %s",
            tx.amount, DRAGONX_TICKER,
            tx.getTimeString().c_str(),
            tx.confirmations < 1 ? "(unconfirmed)" : "");
        dl->AddText(capFont, capFont->LegacySize, ImVec2(rx + 16, ry),
                    tx.confirmations >= 1 ? Success() : Warning(), buf);

        ImGui::Dummy(ImVec2(width, rH));
        ImGui::Dummy(ImVec2(0, 2));
        shown++;
    }
}

// ============================================================================
// Horizontal Address Strip — bottom switching bar (Layout G signature)
// ============================================================================
static void RenderAddressStrip(App* app, ImDrawList* dl, const WalletState& state,
                               float width, float hs,
                               ImFont* /*sub1*/, ImFont* capFont) {
    char buf[128];

    // Header row with filter and + New button
    Type().textColored(TypeStyle::Overline, OnSurfaceMedium(), "YOUR ADDRESSES");

    float btnW = std::max(70.0f, 85.0f * hs);
    float comboW = std::max(48.0f, 58.0f * hs);
    ImGui::SameLine(width - btnW - comboW - Layout::spacingMd());

    ImGui::PushStyleVar(ImGuiStyleVar_FrameRounding, Layout::spacingSm());
    const char* types[] = { "All", "Z", "T" };
    ImGui::SetNextItemWidth(comboW);
    ImGui::Combo("##AddrTypeStrip", &s_addr_type_filter, types, 3);

    ImGui::SameLine();
    ImGui::BeginDisabled(!app->isConnected());
    if (TactileButton("+ New##strip", ImVec2(btnW, 0), schema::UI().resolveFont("button"))) {
        if (s_addr_type_filter != 2) {
            app->createNewZAddress([](const std::string& addr) {
                if (addr.empty())
                    Notifications::instance().error("Failed to create new shielded address");
                else
                    Notifications::instance().success("New shielded address created");
            });
        } else {
            app->createNewTAddress([](const std::string& addr) {
                if (addr.empty())
                    Notifications::instance().error("Failed to create new transparent address");
                else
                    Notifications::instance().success("New transparent address created");
            });
        }
    }
    ImGui::EndDisabled();
    ImGui::PopStyleVar();

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

    if (!app->isConnected()) {
        Type().textColored(TypeStyle::Caption, Warning(), "Waiting for connection...");
        return;
    }

    if (state.addresses.empty()) {
        // Loading skeleton
        ImVec2 skelPos = ImGui::GetCursorScreenPos();
        float alpha = (float)(0.3 + 0.15 * std::sin(ImGui::GetTime() * 2.0));
        ImU32 skelCol = IM_COL32(255, 255, 255, (int)(alpha * 255));
        for (int sk = 0; sk < 3; sk++) {
            dl->AddRectFilled(
                ImVec2(skelPos.x + sk * (130 + 8), skelPos.y),
                ImVec2(skelPos.x + sk * (130 + 8) + 120, skelPos.y + 56),
                skelCol, 6.0f);
        }
        ImGui::Dummy(ImVec2(width, 60));
        return;
    }

    TrackNewAddresses(state);
    AddressGroups groups = BuildSortedAddressGroups(state);

    // Build filtered list
    std::vector<int> filteredIdxs;
    if (s_addr_type_filter != 2)
        for (int idx : groups.shielded) filteredIdxs.push_back(idx);
    if (s_addr_type_filter != 1)
        for (int idx : groups.transparent) filteredIdxs.push_back(idx);

    // Horizontal scrolling strip
    float cardW = std::max(140.0f, std::min(200.0f, width * 0.22f));
    float cardH = std::max(52.0f, 64.0f * hs);
    float stripH = cardH + 8;

    ImGui::BeginChild("##AddrStrip", ImVec2(width, stripH), false,
        ImGuiWindowFlags_HorizontalScrollbar | ImGuiWindowFlags_NoBackground);
    ImDrawList* sdl = ImGui::GetWindowDrawList();

    for (size_t fi = 0; fi < filteredIdxs.size(); fi++) {
        int i = filteredIdxs[fi];
        const auto& addr = state.addresses[i];
        bool isCurrent = (i == s_selected_address_idx);
        bool isZ = addr.type == "shielded";
        ImU32 typeCol = isZ ? IM_COL32(77, 204, 77, 255) : IM_COL32(204, 170, 51, 255);
        bool hasBalance = addr.balance > 0;

        ImVec2 cardMin = ImGui::GetCursorScreenPos();
        ImVec2 cardMax(cardMin.x + cardW, cardMin.y + cardH);

        // Card background
        GlassPanelSpec cardGlass;
        cardGlass.rounding = Layout::glassRounding() * 0.75f;
        cardGlass.fillAlpha = isCurrent ? 28 : 14;
        cardGlass.borderAlpha = isCurrent ? 50 : 25;
        DrawGlassPanel(sdl, cardMin, cardMax, cardGlass);

        // Selected indicator — top accent bar
        if (isCurrent) {
            sdl->AddRectFilled(cardMin, ImVec2(cardMax.x, cardMin.y + 3), Primary(),
                               cardGlass.rounding);
        }

        float ix = cardMin.x + Layout::spacingMd();
        float iy = cardMin.y + Layout::spacingSm() + (isCurrent ? 4 : 0);

        // Type dot
        sdl->AddCircleFilled(ImVec2(ix + 4, iy + 6), 3.5f, typeCol);

        // Address label or truncated address
        auto lblIt = s_address_labels.find(addr.address);
        bool hasLabel = (lblIt != s_address_labels.end() && !lblIt->second.empty());
        size_t addrTruncLen = static_cast<size_t>(std::max(8.0f, (cardW - 30) / 9.0f));

        if (hasLabel) {
            sdl->AddText(capFont, capFont->LegacySize,
                         ImVec2(ix + 14, iy),
                         isCurrent ? PrimaryLight() : OnSurfaceMedium(),
                         lblIt->second.c_str());
            std::string shortAddr = TruncateAddress(addr.address, std::max((size_t)6, addrTruncLen / 2));
            sdl->AddText(capFont, capFont->LegacySize,
                         ImVec2(ix + 14, iy + capFont->LegacySize + 2),
                         OnSurfaceDisabled(), shortAddr.c_str());
        } else {
            std::string dispAddr = TruncateAddress(addr.address, addrTruncLen);
            sdl->AddText(capFont, capFont->LegacySize,
                         ImVec2(ix + 14, iy),
                         isCurrent ? OnSurface() : OnSurfaceDisabled(),
                         dispAddr.c_str());
        }

        // Balance
        snprintf(buf, sizeof(buf), "%.4f %s", addr.balance, DRAGONX_TICKER);
        ImVec2 balSz = capFont->CalcTextSizeA(capFont->LegacySize, 10000, 0, buf);
        float balY = cardMax.y - balSz.y - Layout::spacingSm();
        sdl->AddText(capFont, capFont->LegacySize,
                     ImVec2(ix + 14, balY),
                     hasBalance ? typeCol : OnSurfaceDisabled(), buf);

        // NEW badge
        double now = ImGui::GetTime();
        auto newIt = s_new_address_timestamps.find(addr.address);
        if (newIt != s_new_address_timestamps.end() && newIt->second > 0.0) {
            double age = now - newIt->second;
            if (age < 10.0) {
                float alpha = (float)std::max(0.0, 1.0 - age / 10.0);
                int a = (int)(alpha * 220);
                ImVec2 badgePos(cardMax.x - 32, cardMin.y + 4);
                sdl->AddRectFilled(badgePos, ImVec2(badgePos.x + 28, badgePos.y + 14),
                                   IM_COL32(77, 204, 255, a / 4), 3.0f);
                sdl->AddText(capFont, capFont->LegacySize,
                             ImVec2(badgePos.x + 4, badgePos.y + 1),
                             IM_COL32(77, 204, 255, a), "NEW");
            }
        }

        // Click interaction
        ImGui::SetCursorScreenPos(cardMin);
        ImGui::PushID(i);
        ImGui::InvisibleButton("##addrCard", ImVec2(cardW, cardH));
        if (ImGui::IsItemHovered()) {
            if (!isCurrent)
                sdl->AddRectFilled(cardMin, cardMax, IM_COL32(255, 255, 255, 10),
                                   cardGlass.rounding);
            ImGui::SetMouseCursor(ImGuiMouseCursor_Hand);
            ImGui::SetTooltip("%s\nBalance: %.8f %s%s\nDouble-click to copy | Right-click for options",
                addr.address.c_str(), addr.balance, DRAGONX_TICKER,
                isCurrent ? " (selected)" : "");
        }
        if (ImGui::IsItemClicked(ImGuiMouseButton_Left)) {
            s_selected_address_idx = i;
            s_cached_qr_data.clear();
        }
        if (ImGui::IsItemHovered() && ImGui::IsMouseDoubleClicked(ImGuiMouseButton_Left)) {
            ImGui::SetClipboardText(addr.address.c_str());
            Notifications::instance().info("Address copied to clipboard");
        }

        // Context menu
        if (ImGui::BeginPopupContextItem("##addrStripCtx")) {
            if (ImGui::MenuItem("Copy Address")) {
                ImGui::SetClipboardText(addr.address.c_str());
                Notifications::instance().info("Address copied to clipboard");
            }
            if (ImGui::MenuItem("View on Explorer")) {
                OpenExplorerURL(addr.address);
            }
            if (addr.balance > 0) {
                if (ImGui::MenuItem("Send From This Address")) {
                    SetSendFromAddress(addr.address);
                    app->setCurrentPage(NavPage::Send);
                }
            }
            ImGui::EndPopup();
        }
        ImGui::PopID();

        ImGui::SameLine(0, Layout::spacingSm());
    }

    // Total balance at end of strip
    {
        double totalBal = 0;
        for (const auto& a : state.addresses) totalBal += a.balance;
        ImVec2 totPos = ImGui::GetCursorScreenPos();
        float totCardW = std::max(100.0f, cardW * 0.6f);
        ImVec2 totMax(totPos.x + totCardW, totPos.y + cardH);

        GlassPanelSpec totGlass;
        totGlass.rounding = Layout::glassRounding() * 0.75f;
        totGlass.fillAlpha = 8;
        totGlass.borderAlpha = 15;
        DrawGlassPanel(sdl, totPos, totMax, totGlass);

        sdl->AddText(capFont, capFont->LegacySize,
                     ImVec2(totPos.x + Layout::spacingMd(), totPos.y + Layout::spacingSm()),
                     OnSurfaceMedium(), "TOTAL");
        snprintf(buf, sizeof(buf), "%.8f", totalBal);
        ImVec2 totSz = capFont->CalcTextSizeA(capFont->LegacySize, 10000, 0, buf);
        sdl->AddText(capFont, capFont->LegacySize,
                     ImVec2(totPos.x + Layout::spacingMd(),
                            totMax.y - totSz.y - Layout::spacingSm()),
                     OnSurface(), buf);
        snprintf(buf, sizeof(buf), "%s", DRAGONX_TICKER);
        sdl->AddText(capFont, capFont->LegacySize,
                     ImVec2(totPos.x + Layout::spacingMd(),
                            totMax.y - totSz.y - Layout::spacingSm() - capFont->LegacySize - 2),
                     OnSurfaceDisabled(), buf);
        ImGui::Dummy(ImVec2(totCardW, cardH));
    }

    // Keyboard navigation
    if (ImGui::IsWindowFocused(ImGuiFocusedFlags_RootAndChildWindows)) {
        if (ImGui::IsKeyPressed(ImGuiKey_RightArrow)) {
            int next = s_selected_address_idx + 1;
            if (next < (int)state.addresses.size()) {
                s_selected_address_idx = next;
                s_cached_qr_data.clear();
            }
        }
        if (ImGui::IsKeyPressed(ImGuiKey_LeftArrow)) {
            int prev = s_selected_address_idx - 1;
            if (prev >= 0) {
                s_selected_address_idx = prev;
                s_cached_qr_data.clear();
            }
        }
        if (ImGui::IsKeyPressed(ImGuiKey_Enter) || ImGui::IsKeyPressed(ImGuiKey_KeypadEnter)) {
            if (s_selected_address_idx >= 0 && s_selected_address_idx < (int)state.addresses.size()) {
                ImGui::SetClipboardText(state.addresses[s_selected_address_idx].address.c_str());
                Notifications::instance().info("Address copied to clipboard");
            }
        }
    }

    ImGui::EndChild(); // ##AddrStrip
}

// ============================================================================
// MAIN: RenderReceiveTab — Layout G: QR-Centered Hero
// ============================================================================
void RenderReceiveTab(App* app)
{
    const auto& state = app->getWalletState();

    RenderSyncBanner(state);

    ImVec2 recvAvail = ImGui::GetContentRegionAvail();
    ImGui::BeginChild("##ReceiveScroll", recvAvail, false, ImGuiWindowFlags_NoBackground);

    float hs = Layout::hScale(recvAvail.x);
    float vScale = Layout::vScale(recvAvail.y);
    float glassRound = Layout::glassRounding();

    float availWidth = ImGui::GetContentRegionAvail().x;
    float contentWidth = std::min(availWidth * 0.92f, 1200.0f * hs);
    float offsetX = (availWidth - contentWidth) * 0.5f;
    if (offsetX > 0) ImGui::SetCursorPosX(ImGui::GetCursorPosX() + offsetX);

    float sectionGap = Layout::spacingXl() * vScale;

    ImGui::BeginGroup();
    ImDrawList* dl = ImGui::GetWindowDrawList();
    GlassPanelSpec glassSpec;
    glassSpec.rounding = glassRound;
    ImFont* capFont = Type().caption();
    ImFont* sub1    = Type().subtitle1();
    ImFont* body2   = Type().body2();

    // Auto-select first address
    if (!state.addresses.empty() &&
        (s_selected_address_idx < 0 ||
         s_selected_address_idx >= (int)state.addresses.size())) {
        s_selected_address_idx = 0;
    }

    const AddressInfo* selected = nullptr;
    if (s_selected_address_idx >= 0 &&
        s_selected_address_idx < (int)state.addresses.size()) {
        selected = &state.addresses[s_selected_address_idx];
    }

    // Generate QR data
    std::string qr_data;
    if (selected) {
        qr_data = selected->address;
        if (s_request_amount > 0) {
            qr_data = std::string("dragonx:") + selected->address +
                      "?amount=" + std::to_string(s_request_amount);
            if (s_request_memo[0] && selected->type == "shielded") {
                qr_data += "&memo=" + std::string(s_request_memo);
            }
        }
        if (qr_data != s_cached_qr_data) {
            if (s_qr_texture) {
                FreeQRTexture(s_qr_texture);
                s_qr_texture = 0;
            }
            int w, h;
            s_qr_texture = GenerateQRTexture(qr_data.c_str(), &w, &h);
            s_cached_qr_data = qr_data;
        }
    }

    // ================================================================
    // Not connected / empty state
    // ================================================================
    if (!app->isConnected()) {
        ImVec2 emptyMin = ImGui::GetCursorScreenPos();
        float emptyH = 120.0f;
        ImVec2 emptyMax(emptyMin.x + contentWidth, emptyMin.y + emptyH);
        DrawGlassPanel(dl, emptyMin, emptyMax, glassSpec);
        dl->AddText(sub1, sub1->LegacySize,
            ImVec2(emptyMin.x + Layout::spacingXl(), emptyMin.y + Layout::spacingXl()),
            OnSurfaceDisabled(), "Waiting for daemon connection...");
        dl->AddText(capFont, capFont->LegacySize,
            ImVec2(emptyMin.x + Layout::spacingXl(), emptyMin.y + Layout::spacingXl() + sub1->LegacySize + 8),
            OnSurfaceDisabled(), "Your receiving addresses will appear here once connected.");
        ImGui::Dummy(ImVec2(contentWidth, emptyH));
        ImGui::EndGroup();
        ImGui::EndChild();
        return;
    }

    if (state.addresses.empty()) {
        ImVec2 emptyMin = ImGui::GetCursorScreenPos();
        float emptyH = 100.0f;
        ImVec2 emptyMax(emptyMin.x + contentWidth, emptyMin.y + emptyH);
        DrawGlassPanel(dl, emptyMin, emptyMax, glassSpec);
        float alpha = (float)(0.3 + 0.15 * std::sin(ImGui::GetTime() * 2.0));
        ImU32 skelCol = IM_COL32(255, 255, 255, (int)(alpha * 255));
        dl->AddRectFilled(
            ImVec2(emptyMin.x + Layout::spacingLg(), emptyMin.y + Layout::spacingLg()),
            ImVec2(emptyMin.x + contentWidth * 0.6f, emptyMin.y + Layout::spacingLg() + 16),
            skelCol, 4.0f);
        dl->AddRectFilled(
            ImVec2(emptyMin.x + Layout::spacingLg(), emptyMin.y + Layout::spacingLg() + 24),
            ImVec2(emptyMin.x + contentWidth * 0.4f, emptyMin.y + Layout::spacingLg() + 36),
            skelCol, 4.0f);
        dl->AddText(capFont, capFont->LegacySize,
            ImVec2(emptyMin.x + Layout::spacingLg(), emptyMin.y + emptyH - 24),
            OnSurfaceDisabled(), "Loading addresses...");
        ImGui::Dummy(ImVec2(contentWidth, emptyH));
        ImGui::EndGroup();
        ImGui::EndChild();
        return;
    }

    // ================================================================
    // QR HERO — dominates center (Layout G signature)
    // ================================================================
    if (selected) {
        // Calculate QR size based on available space
        float maxQrForWidth = std::min(contentWidth * 0.6f, 400.0f);
        float maxQrForHeight = std::min(recvAvail.y * 0.45f, 400.0f);
        float qrSize = std::max(140.0f, std::min(maxQrForWidth, maxQrForHeight));

        // Center the hero horizontally
        float heroW = std::min(contentWidth, 700.0f * hs);
        float heroOffsetX = (contentWidth - heroW) * 0.5f;
        if (heroOffsetX > 4) {
            ImGui::SetCursorPosX(ImGui::GetCursorPosX() + heroOffsetX);
        }

        RenderQRHero(app, dl, *selected, heroW, qrSize, qr_data,
                     glassSpec, state, sub1, body2, capFont);
        ImGui::Dummy(ImVec2(0, sectionGap));

        // ---- PAYMENT REQUEST (collapsible on narrow) ----
        constexpr float kTwoColumnThreshold = 800.0f;
        bool isNarrow = contentWidth < kTwoColumnThreshold;

        if (isNarrow) {
            ImGui::PushStyleColor(ImGuiCol_Header, ImVec4(0, 0, 0, 0));
            ImGui::PushStyleColor(ImGuiCol_HeaderHovered, ImVec4(1, 1, 1, 0.05f));
            ImGui::PushStyleColor(ImGuiCol_HeaderActive, ImVec4(1, 1, 1, 0.08f));
            ImGui::PushFont(Type().overline());
            s_payment_request_open = ImGui::CollapsingHeader(
                "PAYMENT REQUEST (OPTIONAL)",
                s_payment_request_open ? ImGuiTreeNodeFlags_DefaultOpen : 0);
            ImGui::PopFont();
            ImGui::PopStyleColor(3);

            if (s_payment_request_open) {
                float prW = std::min(contentWidth, 600.0f * hs);
                float prOffX = (contentWidth - prW) * 0.5f;
                if (prOffX > 4) ImGui::SetCursorPosX(ImGui::GetCursorPosX() + prOffX);
                RenderPaymentRequest(dl, *selected, prW, glassSpec, "##hero");
            }
        } else {
            float prW = std::min(contentWidth, 600.0f * hs);
            float prOffX = (contentWidth - prW) * 0.5f;
            if (prOffX > 4) ImGui::SetCursorPosX(ImGui::GetCursorPosX() + prOffX);
            RenderPaymentRequest(dl, *selected, prW, glassSpec, "##hero");
        }
        ImGui::Dummy(ImVec2(0, sectionGap));

        // ---- RECENT RECEIVED ----
        {
            float rcvW = std::min(contentWidth, 600.0f * hs);
            float rcvOffX = (contentWidth - rcvW) * 0.5f;
            if (rcvOffX > 4) ImGui::SetCursorPosX(ImGui::GetCursorPosX() + rcvOffX);
            RenderRecentReceived(dl, *selected, state, rcvW, capFont);
        }
        ImGui::Dummy(ImVec2(0, sectionGap));
    }

    // ================================================================
    // ADDRESS STRIP — horizontal switching bar at bottom
    // ================================================================
    RenderAddressStrip(app, dl, state, contentWidth, hs, sub1, capFont);

    ImGui::EndGroup();
    ImGui::EndChild(); // ##ReceiveScroll
}

} // namespace ui
} // namespace dragonx