// DragonX Wallet - ImGui Edition
// Copyright 2024-2026 The Hush Developers
// Released under the GPLv3
//
// Deterministic in-process fake SDXL backend for lite-wallet tests.
//
// Provides a LiteClientBridgeApi whose function pointers return canned JSON and
// track owned-string allocation/free counts, so tests can drive the lite bridge
// (and, from M1 on, the lite services) without a real litelib_* library, network,
// or the DRAGONX_ENABLE_LITE_BACKEND build flag. Build a bridge with:
//
//     auto bridge = dragonx::wallet::LiteClientBridge::fromApi(dragonx::test::makeFakeLiteApi());
//
// Invariant for leak/double-free checks: after a test, g_liteFakeAlloc == g_liteFakeFreed.

#pragma once

#include "wallet/lite_client_bridge.h"

#include <cstdlib>
#include <cstring>

namespace dragonx {
namespace test {

// Owned-string accounting (C++17 inline vars: single definition across TUs).
inline long g_liteFakeAlloc = 0;   // owned strings handed to the bridge
inline long g_liteFakeFreed = 0;   // owned strings released via freeString
inline bool g_liteFakeWalletExists = true;
inline bool g_liteFakeServerOnline = true;
inline bool g_liteFakeShutdownCalled = false;

inline void resetLiteFakeCounters()
{
    g_liteFakeAlloc = 0;
    g_liteFakeFreed = 0;
    g_liteFakeShutdownCalled = false;
}

inline char* liteFakeDup(const char* s)
{
    char* p = static_cast<char*>(std::malloc(std::strlen(s) + 1));
    std::strcpy(p, s);
    ++g_liteFakeAlloc;
    return p;
}

inline bool liteFakeWalletExists(const char*) { return g_liteFakeWalletExists; }
inline char* liteFakeInitNew(bool, const char*) { return liteFakeDup("{\"result\":\"created\"}"); }
inline char* liteFakeInitFromPhrase(bool, const char*, const char*,
                                    unsigned long long, unsigned long long, bool)
{
    return liteFakeDup("{\"result\":\"restored\"}");
}
inline char* liteFakeInitExisting(bool, const char*) { return liteFakeDup("{\"result\":\"opened\"}"); }
inline char* liteFakeExecute(const char* command, const char*)
{
    // A command named "boom" yields an "Error:"-prefixed response (the bridge's
    // looksLikeError contract maps that to ok=false).
    if (command && std::strcmp(command, "boom") == 0) {
        return liteFakeDup("Error: simulated lite backend failure");
    }
    return liteFakeDup("{\"version\":\"sdxl-fake\"}");
}
inline void liteFakeFree(char* v)
{
    if (v) {
        ++g_liteFakeFreed;
        std::free(v);
    }
}
inline bool liteFakeServerOnline(const char*) { return g_liteFakeServerOnline; }
inline void liteFakeShutdown() { g_liteFakeShutdownCalled = true; }

inline dragonx::wallet::LiteClientBridgeApi makeFakeLiteApi()
{
    dragonx::wallet::LiteClientBridgeApi api;
    api.walletExists = &liteFakeWalletExists;
    api.initializeNew = &liteFakeInitNew;
    api.initializeNewFromPhrase = &liteFakeInitFromPhrase;
    api.initializeExisting = &liteFakeInitExisting;
    api.execute = &liteFakeExecute;
    api.freeString = &liteFakeFree;
    api.checkServerOnline = &liteFakeServerOnline;
    api.shutdown = &liteFakeShutdown;
    return api;
}

} // namespace test
} // namespace dragonx