const fs = require('fs-extra');
const path = require('path');

async function main() {
  try {
    console.log('Starting electron build process...');
    
    // Clean directories
    const distElectronDir = path.resolve(__dirname, '../dist-electron');
    const buildDir = path.resolve(__dirname, '../dist-electron-build');
    await fs.emptyDir(distElectronDir);
    await fs.emptyDir(buildDir);
    console.log('Cleaned directories');

    // First build the web app if it doesn't exist
    const webDist = path.resolve(__dirname, '../dist');
    if (!await fs.pathExists(webDist)) {
      console.log('Web dist not found, building web app first...');
      throw new Error('Please run \'npm run build\' first to build the web app');
    }

    // Copy web files to www directory
    const wwwDir = path.join(distElectronDir, 'www');
    await fs.copy(webDist, wwwDir);
    console.log('Copied web files to:', wwwDir);

    // Copy and process main.js
    const mainJsSrc = path.resolve(__dirname, '../src/electron/main.js');
    const mainJsDest = path.join(distElectronDir, 'main.js');
    await fs.copy(mainJsSrc, mainJsDest);
    console.log('Copied main.js to:', mainJsDest);

    // Create the production package.json
    const devPackageJson = require('../package.json');
    const prodPackageJson = {
      name: devPackageJson.name,
      version: devPackageJson.version,
      description: devPackageJson.description,
      author: devPackageJson.author,
      main: 'main.js',
      private: true
    };

    await fs.writeJson(
      path.join(distElectronDir, 'package.json'),
      prodPackageJson,
      { spaces: 2 }
    );

    // Verify the structure
    console.log('\nVerifying build structure:');
    const printDir = async (dir, prefix = '') => {
      const items = await fs.readdir(dir);
      for (const item of items) {
        const fullPath = path.join(dir, item);
        const stat = await fs.stat(fullPath);
        console.log(`${prefix}${item}${stat.isDirectory() ? '/' : ''}`);
        if (stat.isDirectory()) {
          await printDir(fullPath, `${prefix}  `);
        }
      }
    };
    await printDir(distElectronDir);

    console.log('\nBuild completed successfully!');
  } catch (error) {
    console.error('Build failed:', error);
    process.exit(1);
  }
}

main().catch(console.error);