import {app, BrowserWindow, ipcMain, dialog, session} from 'electron';
import {createRequire} from 'node:module';
import {fileURLToPath} from 'node:url';
import path from 'node:path';

import {getPlatform, isMacOS} from './main/utils/platform';
import {getWindowIconPath} from './main/utils/logo';
import {buildWindowTitle} from '../shared/constants/app';
import {loadEnvFile} from './main/load-env';
import {initUpdater, registerUpdateIpcHandlers} from './main/updater';
import {setupAppMenu} from './main/menu';
import {initLogger, flushLogger, logger} from './main/logger';
import {registerLogIpcHandlers} from './main/ipc/log-ipc';
import {registerSafeStorageIpcHandlers} from './main/ipc/safe-storage-ipc';
import {registerStorageIpcHandlers} from './main/ipc/storage-ipc';
import {BIDIRECTIONAL, RENDERER_TO_MAIN} from '../shared/constants/ipc-channels';

createRequire(import.meta.url);
const __dirname = path.dirname(fileURLToPath(import.meta.url));

process.env.APP_ROOT = path.join(__dirname, '..');

// 加载 .env 文件中的环境变量到 process.env
// 必须在任何读取 process.env.UPDATE_API_URL 的模块之前调用
loadEnvFile();

export const VITE_DEV_SERVER_URL = process.env['VITE_DEV_SERVER_URL'];
export const MAIN_DIST = path.join(process.env.APP_ROOT, 'dist-electron');
export const RENDERER_DIST = path.join(process.env.APP_ROOT, 'dist');

process.env.VITE_PUBLIC = VITE_DEV_SERVER_URL
    ? path.join(process.env.APP_ROOT, 'public')
    : RENDERER_DIST;

// ---------- 平台 & 版本信息 ----------
const currentPlatform = getPlatform();
/** 基础标题（无版控后缀），登录后通过 IPC 追加 */
const WINDOW_TITLE = buildWindowTitle(currentPlatform);

// ============================================================
// 全局未捕获异常（主进程兜底记录）
// ============================================================

process.on('uncaughtException', (error) => {
    try {
        logger.error('app', 'Uncaught exception (main process)', error);
    } catch {
        /* logger 自身异常 — 最后防线 */
    }
});

process.on('unhandledRejection', (reason) => {
    try {
        const error = reason instanceof Error ? reason : new Error(String(reason));
        logger.error('app', 'Unhandled rejection (main process)', error);
    } catch {
        /* logger 自身异常 — 最后防线 */
    }
});

// ============================================================
// 窗口引用
// ============================================================

let mainWindow: BrowserWindow | null = null;

// ============================================================
// 主窗口
// ============================================================

function createMainWindow(): BrowserWindow {
    const iconPath = getWindowIconPath(app.getAppPath());

    mainWindow = new BrowserWindow({
        title: WINDOW_TITLE,
        icon: iconPath,
        width: 1280,
        height: 800,
        minWidth: 960,
        minHeight: 600,
        show: false,
        ...(isMacOS() ? {titleBarStyle: 'hiddenInset' as const} : {}),
        webPreferences: {
            preload: path.join(__dirname, 'preload.mjs'),
            contextIsolation: true,
            nodeIntegration: false,
        },
    });

    mainWindow.setTitle(WINDOW_TITLE);

    if (VITE_DEV_SERVER_URL) {
        mainWindow.webContents.openDevTools();
    }

    // macOS 全屏事件
    if (isMacOS()) {
        mainWindow.on('enter-full-screen', () =>
            mainWindow?.webContents.send('window-fullscreen-changed', true),
        );
        mainWindow.on('leave-full-screen', () =>
            mainWindow?.webContents.send('window-fullscreen-changed', false),
        );
    }

    mainWindow.webContents.on('did-finish-load', () => {
        mainWindow?.webContents.send('main-process-message', new Date().toLocaleString());
        mainWindow?.webContents.send('platform-info', {
            platform: currentPlatform,
            edition: currentEdition,
        });
    });

    // ready-to-show 后显示，避免白屏闪烁
    mainWindow.once('ready-to-show', () => {
        mainWindow?.show();
    });

    if (VITE_DEV_SERVER_URL) {
        mainWindow.loadURL(VITE_DEV_SERVER_URL);
    } else {
        mainWindow.loadFile(path.join(RENDERER_DIST, 'index.html'));
    }

    return mainWindow;
}

// ============================================================
// 应用生命周期
// ============================================================

app.on('window-all-closed', () => {
    if (!isMacOS()) {
        app.quit();
    }
});

app.on('activate', () => {
    if (BrowserWindow.getAllWindows().length === 0) {
        createMainWindow();
    }
});

app.on('before-quit', () => {
    flushLogger();
});

app.whenReady().then(() => {
    initLogger();
    registerLogIpcHandlers();
    registerSafeStorageIpcHandlers();
    registerStorageIpcHandlers();
    setupAppMenu();
    app.setName(WINDOW_TITLE);
    registerUpdateIpcHandlers();
    const fakeUserAgent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36';
    session.defaultSession.webRequest.onBeforeSendHeaders((details, callback) => {
        const url = details.url;
        if (url.includes("rh-images-1252422369.cos.ap-beijing.myqcloud.com")) {
            details.requestHeaders['User-Agent'] = fakeUserAgent;
        }
        callback({
            requestHeaders: details.requestHeaders
        });
    });

    // 文件对话框 IPC 处理（供渲染进程选择文件夹）
    ipcMain.handle(BIDIRECTIONAL.FILE_DIALOG, async (_event, options: Electron.OpenDialogOptions) => {
        if (!mainWindow) return {canceled: true, filePaths: []};
        return dialog.showOpenDialog(mainWindow, {
            title: options?.title || '选择文件夹',
            defaultPath: options?.defaultPath || app.getPath('home'),
            properties: options?.properties || ['openDirectory'],
        });
    });

    // 窗口标题版控后缀（渲染进程登录/登出后调用）
    ipcMain.on(RENDERER_TO_MAIN.SET_WINDOW_TITLE, (_event, edition: string | null) => {
        if (!mainWindow) return;
        const title = edition
            ? buildWindowTitle(currentPlatform, undefined, edition as 'personal' | 'enterprise')
            : buildWindowTitle(currentPlatform);
        mainWindow.setTitle(title);
    });

    // 始终打开主窗口
    // 登录/注册由渲染进程内的 Modal 弹层处理，不再新开窗口
    const win = createMainWindow();
    initUpdater(win);
});