#pragma once

#include "Core/IEditorContext.h"
#include "Core/IProjectManager.h"
#include "Core/ISceneManager.h"

#ifndef NOMINMAX
#define NOMINMAX
#endif

#include <windows.h>
#include <commdlg.h>

#include <array>
#include <filesystem>
#include <string>

namespace XCEngine {
namespace Editor {
namespace SceneEditorUtils {

inline std::wstring Utf8ToWide(const std::string& value) {
    if (value.empty()) {
        return {};
    }

    const int length = MultiByteToWideChar(CP_UTF8, 0, value.c_str(), -1, nullptr, 0);
    if (length <= 0) {
        return {};
    }

    std::wstring result(length - 1, L'\0');
    MultiByteToWideChar(CP_UTF8, 0, value.c_str(), -1, &result[0], length);
    return result;
}

inline std::string WideToUtf8(const std::wstring& value) {
    if (value.empty()) {
        return {};
    }

    const int length = WideCharToMultiByte(CP_UTF8, 0, value.c_str(), -1, nullptr, 0, nullptr, nullptr);
    if (length <= 0) {
        return {};
    }

    std::string result(length - 1, '\0');
    WideCharToMultiByte(CP_UTF8, 0, value.c_str(), -1, &result[0], length, nullptr, nullptr);
    return result;
}

inline std::string SanitizeSceneFileName(const std::string& value) {
    std::string result = value.empty() ? "Untitled Scene" : value;
    for (char& ch : result) {
        switch (ch) {
            case '\\':
            case '/':
            case ':':
            case '*':
            case '?':
            case '"':
            case '<':
            case '>':
            case '|':
                ch = '_';
                break;
            default:
                if (static_cast<unsigned char>(ch) < 32u) {
                    ch = '_';
                }
                break;
        }
    }
    return result;
}

inline HWND GetDialogOwnerWindow() {
    HWND owner = GetActiveWindow();
    if (!owner) {
        owner = GetForegroundWindow();
    }
    return owner;
}

inline const wchar_t* GetSceneFilter() {
    static const wchar_t filter[] =
        L"XCEngine Scene (*.xc)\0*.xc\0Legacy Scene (*.scene;*.unity)\0*.scene;*.unity\0All Files (*.*)\0*.*\0\0";
    return filter;
}

inline std::string OpenSceneFileDialog(const std::string& projectPath, const std::string& initialPath = {}) {
    namespace fs = std::filesystem;

    const fs::path scenesDir = fs::path(projectPath) / "Assets" / "Scenes";
    const std::wstring initialDir = Utf8ToWide(scenesDir.string());

    std::array<wchar_t, 1024> fileBuffer{};
    if (!initialPath.empty()) {
        const std::wstring initialFile = Utf8ToWide(initialPath);
        wcsncpy_s(fileBuffer.data(), fileBuffer.size(), initialFile.c_str(), _TRUNCATE);
    }

    OPENFILENAMEW dialog{};
    dialog.lStructSize = sizeof(dialog);
    dialog.hwndOwner = GetDialogOwnerWindow();
    dialog.lpstrFilter = GetSceneFilter();
    dialog.lpstrFile = fileBuffer.data();
    dialog.nMaxFile = static_cast<DWORD>(fileBuffer.size());
    dialog.lpstrInitialDir = initialDir.empty() ? nullptr : initialDir.c_str();
    dialog.Flags = OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST | OFN_NOCHANGEDIR;

    if (!GetOpenFileNameW(&dialog)) {
        return {};
    }

    return WideToUtf8(fileBuffer.data());
}

inline std::string SaveSceneFileDialog(
    const std::string& projectPath,
    const std::string& currentScenePath,
    const std::string& currentSceneName) {
    namespace fs = std::filesystem;

    const fs::path scenesDir = fs::path(projectPath) / "Assets" / "Scenes";
    const fs::path suggestedPath = currentScenePath.empty()
        ? scenesDir / (SanitizeSceneFileName(currentSceneName) + ".xc")
        : fs::path(currentScenePath).replace_extension(".xc");

    std::array<wchar_t, 1024> fileBuffer{};
    const std::wstring suggestedWide = Utf8ToWide(suggestedPath.string());
    wcsncpy_s(fileBuffer.data(), fileBuffer.size(), suggestedWide.c_str(), _TRUNCATE);

    const std::wstring initialDir = Utf8ToWide(suggestedPath.parent_path().string());
    OPENFILENAMEW dialog{};
    dialog.lStructSize = sizeof(dialog);
    dialog.hwndOwner = GetDialogOwnerWindow();
    dialog.lpstrFilter = GetSceneFilter();
    dialog.lpstrFile = fileBuffer.data();
    dialog.nMaxFile = static_cast<DWORD>(fileBuffer.size());
    dialog.lpstrInitialDir = initialDir.empty() ? nullptr : initialDir.c_str();
    dialog.lpstrDefExt = L"xc";
    dialog.Flags = OFN_OVERWRITEPROMPT | OFN_PATHMUSTEXIST | OFN_NOCHANGEDIR;

    if (!GetSaveFileNameW(&dialog)) {
        return {};
    }

    return WideToUtf8(fileBuffer.data());
}

inline bool SaveCurrentScene(IEditorContext& context) {
    auto& sceneManager = context.GetSceneManager();
    if (sceneManager.SaveScene()) {
        return true;
    }

    const std::string filePath = SaveSceneFileDialog(
        context.GetProjectPath(),
        sceneManager.GetCurrentScenePath(),
        sceneManager.GetCurrentSceneName());
    if (filePath.empty()) {
        return false;
    }

    const bool saved = sceneManager.SaveSceneAs(filePath);
    if (saved) {
        context.GetProjectManager().RefreshCurrentFolder();
    }
    return saved;
}

inline bool ConfirmSceneSwitch(IEditorContext& context) {
    auto& sceneManager = context.GetSceneManager();
    if (!sceneManager.HasActiveScene() || !sceneManager.IsSceneDirty()) {
        return true;
    }

    const int result = MessageBoxW(
        GetDialogOwnerWindow(),
        L"Save changes to the current scene before continuing?",
        L"Unsaved Scene Changes",
        MB_YESNOCANCEL | MB_ICONWARNING);

    if (result == IDCANCEL) {
        return false;
    }
    if (result == IDYES) {
        return SaveCurrentScene(context);
    }
    return true;
}

} // namespace SceneEditorUtils
} // namespace Editor
} // namespace XCEngine