const { app, BrowserWindow, ipcMain, dialog } = require('electron');
const fs = require('fs');
const path = require('path');
const AdmZip = require('adm-zip'); // For ZIP extraction
const { promisify } = require('util');
const readdir = promisify(fs.readdir);
const stat = promisify(fs.stat);
const { exec } = require('child_process');

let mainWindow;

function createWindow() {
    mainWindow = new BrowserWindow({
        width: 1000,
        height: 800,
        webPreferences: {
            nodeIntegration: true,
            contextIsolation: false,
            webviewTag: true,  // Make sure webview is enabled
        }
    });

    mainWindow.loadFile('index.html');
}

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

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

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


// Function to download and extract ZIP files
ipcMain.handle('download-and-extract', async (event, downloadUrl, libraryFolder, fileName) => {
    try {
        const downloadPath = path.join(libraryFolder, fileName);
        
        // Start downloading the game from the URL
        const response = await fetch(downloadUrl);
        if (!response.ok) throw new Error('Download failed');
        
        const buffer = await response.arrayBuffer();
        const fileBuffer = Buffer.from(buffer);

        // Write the downloaded zip file to disk
        fs.writeFileSync(downloadPath, fileBuffer);
        
        // Now extract the downloaded ZIP
        await extractZip(downloadPath, libraryFolder);

        // Return the path to the extracted folder
        return { success: true, folderPath: libraryFolder };

    } catch (error) {
        console.error('Error during download or extraction:', error);
        return { success: false, error: error.message };
    }
});

// Function to extract ZIP files
async function extractZip(zipPath, extractToFolder) {
    try {
        const zip = new AdmZip(zipPath);
        zip.extractAllTo(extractToFolder, true);
        console.log(`Extracted ZIP to ${extractToFolder}`);
        
        // Clean up the ZIP file after extraction
        fs.unlinkSync(zipPath); // Delete the ZIP file
    } catch (error) {
        console.error('Error extracting ZIP:', error);
        throw new Error('Error extracting ZIP');
    }
}


// Scan for .exe files in the Library folder (excluding `redist` folders)
ipcMain.handle('scan-library', async (event, libraryFolder) => {
    try {
        const gameExecutables = await scanForExecutables(libraryFolder);
        return gameExecutables;
    } catch (error) {
        console.error('Error scanning library:', error);
        return [];
    }
});


async function scanForExecutables(directory) {
        console.log(directory.exeFiles)
        return directory.exeFiles;
}

module.exports = { scanForExecutables };
// Handle the Wine binary selection
ipcMain.handle('select-wine-binary', async () => {
  const result = await dialog.showOpenDialog({
    properties: ['openFile'],
    filters: [{ name: 'Executables', extensions: ['exe'] }],
  });

  if (result.canceled || result.filePaths.length === 0) {
    return null;
  }

  winePath = result.filePaths[0]; // Store the path to the Wine binary
  return winePath;
});

// Handle the selection of a Library folder and get list of `.exe` files
ipcMain.handle('select-library-folder', async () => {
  const result = await dialog.showOpenDialog({
    properties: ['openDirectory'],
  });

  if (result.canceled || result.filePaths.length === 0) {
    return null;
  }

  const libraryFolderPath = result.filePaths[0];
  const exeFiles = await scanDirectory(libraryFolderPath);  // Scan the folder for .exe files
  return { libraryFolderPath, exeFiles };
});

// Recursive function to scan a directory for `.exe` files
async function scanDirectory(dirPath) {
  const exeFiles = [];
  const files = await fs.promises.readdir(dirPath, { withFileTypes: true });

  for (const file of files) {
    const fullPath = path.join(dirPath, file.name);

    if (file.isDirectory()) {
      // Recursively scan subdirectories
      const subDirFiles = await scanDirectory(fullPath);
      exeFiles.push(...subDirFiles);
    } else if (file.isFile() && file.name.toLowerCase().endsWith('.exe')) {
      // Add `.exe` files to the list
      exeFiles.push(fullPath);
    }
  }

  return exeFiles;
}

// Handle running the game via Wine
ipcMain.handle('run-game-with-wine', async (event, gameExePath) => {
    if (!winePath) {
      return { success: false, message: 'Wine binary not selected' };
    }
  
    try {
      await runWineCommand(winePath, gameExePath);
      return { success: true };
    } catch (error) {
      return { success: false, message: error.message };
    }
  });
  
  // Helper function to execute Wine command
  function runWineCommand(wineBinary, gameExePath) {
    return new Promise((resolve, reject) => {
      const command = `"${wineBinary}" "${gameExePath}"`;
  
      exec(command, (error, stdout, stderr) => {
        if (error) {
          reject(new Error(`Error running Wine command: ${stderr || stdout}`));
        } else {
          resolve(stdout);
        }
      });
    });
  }