#!/usr/bin/env node

/**
 * npm postinstall script
 * Downloads the correct binary for the current platform
 */

import { createWriteStream, chmodSync, existsSync, mkdirSync } from 'fs';
import { dirname, join } from 'path';
import { fileURLToPath } from 'url';
import { get as httpsGet } from 'https';
import { get as httpGet } from 'http';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const rootDir = join(__dirname, '..');

const REPO_URL = 'https://code.foss.global/serve.zone/isocreator';
const VERSION = '1.0.0'; // Will be updated automatically

// Detect platform and architecture
const platformMap = {
  darwin: 'macos',
  linux: 'linux',
  win32: 'windows',
};

const archMap = {
  x64: 'x64',
  arm64: 'arm64',
};

const platform = platformMap[process.platform];
const arch = archMap[process.arch];

if (!platform || !arch) {
  console.error(`❌ Unsupported platform: ${process.platform}-${process.arch}`);
  console.error('Supported platforms: linux-x64, linux-arm64, darwin-x64, darwin-arm64, win32-x64');
  process.exit(1);
}

const ext = platform === 'windows' ? '.exe' : '';
const binaryName = `isocreator-${platform}-${arch}${ext}`;
const binaryDir = join(rootDir, 'dist', 'binaries');
const binaryPath = join(binaryDir, binaryName);

// Create directory if it doesn't exist
if (!existsSync(binaryDir)) {
  mkdirSync(binaryDir, { recursive: true });
}

// Try release URL first, fallback to raw branch
const urls = [
  `${REPO_URL}/releases/download/v${VERSION}/${binaryName}`,
  `${REPO_URL}/raw/branch/main/dist/binaries/${binaryName}`,
];

console.log(`📦 Installing isocreator for ${platform}-${arch}...`);

function downloadFile(url, attempt = 1) {
  return new Promise((resolve, reject) => {
    const protocol = url.startsWith('https') ? httpsGet : httpGet;

    console.log(`⬇️  Downloading from: ${url}`);

    protocol(url, { timeout: 30000 }, (response) => {
      // Handle redirects
      if (response.statusCode === 301 || response.statusCode === 302) {
        const redirectUrl = response.headers.location;
        console.log(`↪️  Redirecting to: ${redirectUrl}`);
        return downloadFile(redirectUrl, attempt).then(resolve).catch(reject);
      }

      if (response.statusCode !== 200) {
        console.warn(`⚠️  Failed to download (HTTP ${response.statusCode})`);

        if (attempt < urls.length) {
          console.log(`🔄 Trying fallback URL (${attempt + 1}/${urls.length})...`);
          return downloadFile(urls[attempt], attempt + 1).then(resolve).catch(reject);
        }

        return reject(new Error(`Failed to download binary from all sources`));
      }

      const file = createWriteStream(binaryPath);
      const totalBytes = parseInt(response.headers['content-length'], 10);
      let downloadedBytes = 0;

      response.on('data', (chunk) => {
        downloadedBytes += chunk.length;
        if (totalBytes) {
          const percent = ((downloadedBytes / totalBytes) * 100).toFixed(1);
          process.stdout.write(`\r📥 Progress: ${percent}%`);
        }
      });

      response.pipe(file);

      file.on('finish', () => {
        file.close();
        console.log('\n✅ Download complete!');

        // Make executable on Unix-like systems
        if (platform !== 'windows') {
          try {
            chmodSync(binaryPath, 0o755);
            console.log('✅ Binary made executable');
          } catch (err) {
            console.warn('⚠️  Failed to make binary executable:', err.message);
          }
        }

        resolve();
      });

      file.on('error', (err) => {
        file.close();
        reject(err);
      });
    }).on('error', (err) => {
      if (attempt < urls.length) {
        console.warn(`⚠️  Download failed:`, err.message);
        console.log(`🔄 Trying fallback URL (${attempt + 1}/${urls.length})...`);
        downloadFile(urls[attempt], attempt + 1).then(resolve).catch(reject);
      } else {
        reject(err);
      }
    });
  });
}

// Start download
downloadFile(urls[0], 1)
  .then(() => {
    console.log('🎉 isocreator installed successfully!');
    console.log(`\n💡 Try running: isocreator --help`);
    process.exit(0);
  })
  .catch((err) => {
    console.error('\n❌ Installation failed:', err.message);
    console.error('\nYou can try manual installation:');
    console.error(`  curl -sSL ${REPO_URL}/raw/branch/main/install.sh | sudo bash`);
    process.exit(1);
  });