#!/usr/bin/env node

const { Command } = require('commander');
const chalk = require('chalk');
const path = require('path');
const fs = require('fs-extra');
const os = require('os');

const program = new Command();
const packageRoot = path.dirname(__dirname);

// Helper to create hooks configuration
async function createHooksConfig() {
  const claudeConfigDir = path.join(os.homedir(), '.config', 'claude');
  const hooksConfigFile = path.join(claudeConfigDir, 'hooks.json');
  
  await fs.ensureDir(claudeConfigDir);
  
  const hooksConfig = {
    hooks: {
      UserPromptSubmit: `node ${path.join(packageRoot, 'hooks', 'context-monitor.js')}`,
      PreToolUse: {
        Bash: `node ${path.join(packageRoot, 'hooks', 'command-validator.js')}`
      },
      PostToolUse: {
        '*': `node ${path.join(packageRoot, 'hooks', 'session-logger.js')}`
      },
      Stop: `node ${path.join(packageRoot, 'hooks', 'session-finalizer.js')}`
    }
  };
  
  await fs.writeJson(hooksConfigFile, hooksConfig, { spaces: 2 });
  return hooksConfigFile;
}

// Helper to test a hook script
async function testHookScript(scriptName, testInput) {
  return new Promise((resolve) => {
    const { spawn } = require('child_process');
    const scriptPath = path.join(packageRoot, 'hooks', scriptName);
    
    const child = spawn('node', [scriptPath], {
      stdio: ['pipe', 'pipe', 'pipe'],
      cwd: packageRoot
    });
    
    let stdout = '';
    let stderr = '';
    
    child.stdout.on('data', (data) => {
      stdout += data.toString();
    });
    
    child.stderr.on('data', (data) => {
      stderr += data.toString();
    });
    
    child.stdin.write(JSON.stringify(testInput));
    child.stdin.end();
    
    const timeout = setTimeout(() => {
      child.kill();
      resolve({ success: false, error: 'Timeout' });
    }, 10000);
    
    child.on('close', (code) => {
      clearTimeout(timeout);
      resolve({
        success: code === 0,
        stdout: stdout.trim(),
        stderr: stderr.trim()
      });
    });
    
    child.on('error', (error) => {
      clearTimeout(timeout);
      resolve({ success: false, error: error.message });
    });
  });
}

// Helper to check installation status
async function checkStatus() {
  const hooksConfig = path.join(os.homedir(), '.config', 'claude', 'hooks.json');
  const hasHooks = await fs.pathExists(hooksConfig);
  
  console.log(chalk.blue('Claude Hooks Status:'));
  console.log(hasHooks ? chalk.green('✓ Hooks configuration installed') : chalk.red('✗ No hooks configuration found'));
  console.log(chalk.green('✓ Node.js runtime available'));
  
  return hasHooks;
}

// Helper to remove hooks configuration
async function removeHooksConfig() {
  const hooksConfig = path.join(os.homedir(), '.config', 'claude', 'hooks.json');
  
  if (await fs.pathExists(hooksConfig)) {
    await fs.remove(hooksConfig);
    return true;
  }
  
  return false;
}

program
  .name('claude-hooks')
  .description('Intelligent hooks system for Claude Code')
  .version(require('../package.json').version);

program
  .command('init')
  .description('Initialize Claude Hooks (run after npm install)')
  .option('--force', 'Force reinstallation even if already configured')
  .option('--auto-setup', 'Auto-setup during npm postinstall')
  .option('--quiet', 'Minimal output')
  .action(async (options) => {
    if (!options.quiet) {
      console.log(chalk.blue('Initializing Claude Hooks...'));
    }
    
    try {
      // Check for existing installation
      if (!options.force && await checkStatus()) {
        if (!options.quiet) {
          console.log(chalk.yellow('⚠️  Claude Hooks already configured. Use --force to reinstall.'));
        }
        return;
      }
      
      // Create runtime directories
      const runtimeDir = path.join(packageRoot, '.claude_hooks');
      await fs.ensureDir(path.join(runtimeDir, 'backups'));
      await fs.ensureDir(path.join(runtimeDir, 'logs'));
      await fs.ensureDir(path.join(runtimeDir, 'patterns'));
      
      // Create hooks configuration
      const configFile = await createHooksConfig();
      
      if (!options.quiet) {
        console.log(chalk.green('✅ Claude Hooks initialized successfully!'));
        console.log(chalk.blue('Configuration file:'), configFile);
        console.log(chalk.blue('Next steps:'));
        console.log('1. Restart Claude Code to activate hooks');
        console.log('2. Try: claude-hooks test');
      }
      
    } catch (error) {
      console.error(chalk.red('❌ Initialization failed:'), error.message);
      process.exit(1);
    }
  });

program
  .command('status')
  .description('Show Claude Hooks installation status')
  .action(async () => {
    await checkStatus();
  });

program
  .command('test')
  .description('Run Claude Hooks tests')
  .action(async () => {
    console.log(chalk.blue('Running Claude Hooks tests...'));
    
    let passed = 0;
    let total = 0;
    
    // Test 1: Check configuration
    total++;
    console.log('Testing configuration...');
    if (await checkStatus()) {
      console.log(chalk.green('✓ Configuration exists'));
      passed++;
    } else {
      console.log(chalk.red('✗ Configuration missing'));
    }
    
    // Test 2: Test hook scripts
    const hookTests = [
      {
        name: 'context-monitor.js',
        input: { prompt: 'test prompt', context_size: 1000 }
      },
      {
        name: 'command-validator.js', 
        input: { tool: 'Bash', parameters: { command: 'pip install requests' } }
      },
      {
        name: 'session-logger.js',
        input: { tool: 'Bash', parameters: { command: 'echo test' }, success: true }
      },
      {
        name: 'session-finalizer.js',
        input: {}
      }
    ];
    
    for (const test of hookTests) {
      total++;
      console.log(`Testing ${test.name}...`);
      
      const result = await testHookScript(test.name, test.input);
      
      if (result.success) {
        console.log(chalk.green(`✓ ${test.name} working`));
        passed++;
      } else {
        console.log(chalk.red(`✗ ${test.name} failed: ${result.error || result.stderr}`));
      }
    }
    
    // Summary
    console.log();
    if (passed === total) {
      console.log(chalk.green(`✅ All ${total} tests passed!`));
      console.log(chalk.green('Claude Hooks is ready to use!'));
    } else {
      console.log(chalk.yellow(`⚠️  ${passed}/${total} tests passed`));
      console.log(chalk.blue('Try: claude-hooks init --force'));
      process.exit(1);
    }
  });

program
  .command('uninstall')
  .description('Remove Claude Hooks configuration')
  .option('--quiet', 'Minimal output')
  .action(async (options) => {
    if (!options.quiet) {
      console.log(chalk.blue('Uninstalling Claude Hooks...'));
    }
    
    try {
      const removed = await removeHooksConfig();
      
      if (removed) {
        if (!options.quiet) {
          console.log(chalk.green('✅ Claude Hooks configuration removed'));
          console.log(chalk.yellow('Note: To completely remove the package: npm uninstall -g claude-hooks'));
        }
      } else {
        if (!options.quiet) {
          console.log(chalk.yellow('⚠️  No Claude Hooks configuration found'));
        }
      }
      
    } catch (error) {
      console.error(chalk.red('❌ Uninstall failed:'), error.message);
      process.exit(1);
    }
  });

program
  .command('backup')
  .description('Manually trigger a backup')
  .action(async () => {
    console.log(chalk.blue('Creating manual backup...'));
    
    try {
      // Import backup manager
      const { BackupManager } = require(path.join(packageRoot, 'lib', 'backup-manager'));
      const backupManager = new BackupManager();
      
      const backupId = await backupManager.createBackup(process.cwd(), {
        trigger: 'manual',
        timestamp: new Date().toISOString()
      });
      
      if (backupId) {
        console.log(chalk.green(`✅ Backup created: ${backupId}`));
      } else {
        console.log(chalk.red('❌ Backup failed'));
        process.exit(1);
      }
      
    } catch (error) {
      console.error(chalk.red('❌ Backup failed:'), error.message);
      process.exit(1);
    }
  });

program.parse();