import { app, BrowserWindow, ipcMain, dialog } from 'electron';
import * as path from 'path';
import * as fs from 'fs';

function createWindow() {
    const win = new BrowserWindow({
        width: 1000,
        height: 800,
        webPreferences: {
            preload: path.join(__dirname, 'preload.js'),
            nodeIntegration: false,
            contextIsolation: true,
            sandbox: true
        },
        // Modern dark theme background
        backgroundColor: '#0f172a',
        titleBarStyle: 'hiddenInset' // Looks cleaner on macOS, normal on others
    });

    win.loadFile(path.join(__dirname, '../index.html'));
    // Note: index.html is in the root, dist/main.js is in dist/. So we need to go up one level.
}

app.whenReady().then(() => {
    createWindow();

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

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

ipcMain.handle('open-file-dialog', async () => {
    const { canceled, filePaths } = await dialog.showOpenDialog({
        properties: ['openFile'],
        filters: [
            { name: 'Markdown', extensions: ['md', 'markdown', 'txt'] },
            { name: 'All Files', extensions: ['*'] }
        ]
    });

    if (canceled) {
        return null;
    } else {
        return filePaths[0];
    }
});

ipcMain.handle('read-file', async (event, filePath: string) => {
    try {
        const content = fs.readFileSync(filePath, 'utf-8');
        return content;
    } catch (err) {
        console.error("Error reading file", err);
        throw err;
    }
});

const configPath = path.join(app.getPath('userData'), 'config.json');

ipcMain.handle('load-settings', async () => {
    try {
        if (fs.existsSync(configPath)) {
            const data = fs.readFileSync(configPath, 'utf-8');
            return JSON.parse(data);
        }
    } catch (error) {
        console.error('Failed to load settings:', error);
    }
    return {};
});

ipcMain.handle('save-settings', async (event, settings) => {
    try {
        fs.writeFileSync(configPath, JSON.stringify(settings, null, 2));
    } catch (error) {
        console.error('Failed to save settings:', error);
    }
});