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);

    // Fix paths in index.html
    const indexPath = path.join(wwwDir, 'index.html');
    let indexContent = await fs.readFile(indexPath, 'utf8');
    indexContent = indexContent
      // Fix absolute paths to be relative
      .replace(/src="\//g, 'src="\./')
      .replace(/href="\//g, 'href="\./')
      // Fix relative asset paths
      .replace(/src="\.\.\/assets\//g, 'src="./www/assets/')
      .replace(/href="\.\.\/assets\//g, 'href="./www/assets/')
      // Fix modulepreload paths specifically
      .replace(/<link [^>]*rel="modulepreload"[^>]*href="(?!\.?\/www\/)(\/\.\/)?assets\//g, '<link rel="modulepreload" as="script" crossorigin="" href="./www/assets/')
      .replace(/<link [^>]*rel="modulepreload"[^>]*href="(?!\.?\/www\/)(\/)?assets\//g, '<link rel="modulepreload" as="script" crossorigin="" href="./www/assets/')
      // Fix stylesheet paths
      .replace(/<link [^>]*rel="stylesheet"[^>]*href="(?!\.?\/www\/)(\/\.\/)?assets\//g, '<link rel="stylesheet" crossorigin="" href="./www/assets/')
      .replace(/<link [^>]*rel="stylesheet"[^>]*href="(?!\.?\/www\/)(\/)?assets\//g, '<link rel="stylesheet" crossorigin="" href="./www/assets/')
      // Fix any remaining asset paths that don't already have www
      .replace(/(['"]\/?)((?!www\/)(assets\/))/, '"./www/assets/');
    await fs.writeFile(indexPath, indexContent);
    
    console.log('Copied and fixed web files in:', wwwDir);

    // Copy main process files
    const mainProcessFiles = [
      'src/electron/main.js',
    ];

    for (const file of mainProcessFiles) {
      const destPath = path.join(distElectronDir, path.basename(file));
      await fs.copy(file, destPath);
    }

    // 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);