const { app, BrowserWindow, Menu, Tray, ipcMain, nativeImage } = require('electron');
const path = require('path');
const url = require('url');

let mainWindow;
let tray = null;

function createWindow() {
    mainWindow = new BrowserWindow({
        width: 1200,
        height: 800,
        minWidth: 900,
        minHeight: 600,
        icon: path.join(__dirname, 'assets/icon.png'),
        webPreferences: {
            nodeIntegration: true,
            contextIsolation: false,
            enableRemoteModule: true
        },
        frame: false,
        titleBarStyle: 'hiddenInset',
        backgroundColor: '#0f172a',
        show: false
    });

    // Load the app
    const startUrl = process.env.ELECTRON_START_URL || url.format({
        pathname: path.join(__dirname, 'index.html'),
        protocol: 'file:',
        slashes: true
    });
    
    mainWindow.loadURL(startUrl);

    // Show window when ready
    mainWindow.once('ready-to-show', () => {
        mainWindow.show();
        
        // Uncomment for dev tools
        // mainWindow.webContents.openDevTools();
    });

    mainWindow.on('closed', () => {
        mainWindow = null;
    });

    // Create system tray
    createTray();
    
    // Create application menu
    createMenu();
}

function createTray() {
    const iconPath = path.join(__dirname, 'assets/tray-icon.png');
    const trayIcon = nativeImage.createFromPath(iconPath);
    
    tray = new Tray(trayIcon.resize({ width: 16, height: 16 }));
    
    const contextMenu = Menu.buildFromTemplate([
        { label: 'Open SpotSync', click: () => mainWindow.show() },
        { label: 'Pause Engine', type: 'checkbox', checked: false },
        { type: 'separator' },
        { label: 'Quit', click: () => app.quit() }
    ]);
    
    tray.setToolTip('SpotSync Alpha - Trading Replication Engine');
    tray.setContextMenu(contextMenu);
    
    tray.on('click', () => {
        if (mainWindow.isVisible()) {
            mainWindow.hide();
        } else {
            mainWindow.show();
        }
    });
}

function createMenu() {
    const template = [
        {
            label: 'File',
            submenu: [
                { label: 'New Follower...', accelerator: 'CmdOrCtrl+N' },
                { type: 'separator' },
                { label: 'Export Logs...' },
                { type: 'separator' },
                { label: 'Quit', accelerator: 'CmdOrCtrl+Q', click: () => app.quit() }
            ]
        },
        {
            label: 'Edit',
            submenu: [
                { label: 'Undo', accelerator: 'CmdOrCtrl+Z', role: 'undo' },
                { label: 'Redo', accelerator: 'Shift+CmdOrCtrl+Z', role: 'redo' },
                { type: 'separator' },
                { label: 'Cut', accelerator: 'CmdOrCtrl+X', role: 'cut' },
                { label: 'Copy', accelerator: 'CmdOrCtrl+C', role: 'copy' },
                { label: 'Paste', accelerator: 'CmdOrCtrl+V', role: 'paste' },
                { label: 'Select All', accelerator: 'CmdOrCtrl+A', role: 'selectAll' }
            ]
        },
        {
            label: 'View',
            submenu: [
                { label: 'Reload', accelerator: 'CmdOrCtrl+R', click: () => mainWindow.reload() },
                { label: 'Toggle Developer Tools', accelerator: 'F12', click: () => mainWindow.webContents.toggleDevTools() },
                { type: 'separator' },
                { label: 'Zoom In', accelerator: 'CmdOrCtrl+=', role: 'zoomIn' },
                { label: 'Zoom Out', accelerator: 'CmdOrCtrl+-', role: 'zoomOut' },
                { label: 'Reset Zoom', accelerator: 'CmdOrCtrl+0', role: 'resetZoom' }
            ]
        },
        {
            label: 'Engine',
            submenu: [
                { label: 'Start Engine', accelerator: 'CmdOrCtrl+E', enabled: true },
                { label: 'Pause Engine', accelerator: 'CmdOrCtrl+P', enabled: true },
                { label: 'Emergency Stop', accelerator: 'CmdOrCtrl+Shift+S' },
                { type: 'separator' },
                { label: 'Run Diagnostics', accelerator: 'CmdOrCtrl+D' }
            ]
        },
        {
            label: 'Window',
            submenu: [
                { label: 'Minimize', accelerator: 'CmdOrCtrl+M', role: 'minimize' },
                { label: 'Zoom', role: 'zoom' },
                { type: 'separator' },
                { label: 'Always on Top', type: 'checkbox', checked: false, click: (item) => mainWindow.setAlwaysOnTop(item.checked) }
            ]
        },
        {
            label: 'Help',
            submenu: [
                { label: 'Documentation', click: () => require('electron').shell.openExternal('https://github.com/public-apis/public-apis') },
                { label: 'Report Issue', click: () => require('electron').shell.openExternal('https://github.com/') },
                { type: 'separator' },
                { label: 'About SpotSync Alpha...' }
            ]
        }
    ];
    
    const menu = Menu.buildFromTemplate(template);
    Menu.setApplicationMenu(menu);
}

// IPC handlers for window controls
ipcMain.on('window-minimize', () => {
    if (mainWindow) mainWindow.minimize();
});

ipcMain.on('window-maximize', () => {
    if (mainWindow) {
        if (mainWindow.isMaximized()) {
            mainWindow.unmaximize();
        } else {
            mainWindow.maximize();
        }
    }
});

ipcMain.on('window-close', () => {
    if (mainWindow) mainWindow.close();
});

ipcMain.on('window-hide', () => {
    if (mainWindow) mainWindow.hide();
});

// App lifecycle
app.whenReady().then(createWindow);

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

app.on('activate', () => {
    if (mainWindow === null) {
        createWindow();
    }
});