#!/usr/bin/env node

/**
 * Comprehensive Database Debugging Tool
 * 
 * This tool provides detailed database diagnostics and troubleshooting
 * capabilities for the Shattered Void MMO.
 */

require('dotenv').config();
const DatabaseValidator = require('./database-validator');

// Color codes for console output
const colors = {
  reset: '\x1b[0m',
  bright: '\x1b[1m',
  red: '\x1b[31m',
  green: '\x1b[32m',
  yellow: '\x1b[33m',
  blue: '\x1b[34m',
  magenta: '\x1b[35m',
  cyan: '\x1b[36m',
  white: '\x1b[37m'
};

function log(level, message) {
  let colorCode = colors.white;
  let prefix = 'INFO';
  
  switch (level) {
    case 'error':
      colorCode = colors.red;
      prefix = 'ERROR';
      break;
    case 'warn':
      colorCode = colors.yellow;
      prefix = 'WARN';
      break;
    case 'success':
      colorCode = colors.green;
      prefix = 'SUCCESS';
      break;
    case 'info':
      colorCode = colors.cyan;
      prefix = 'INFO';
      break;
    case 'debug':
      colorCode = colors.magenta;
      prefix = 'DEBUG';
      break;
  }
  
  console.log(`${colors.bright}[${prefix}]${colors.reset} ${colorCode}${message}${colors.reset}`);
}

function displayBanner() {
  const banner = `
${colors.cyan}╔═══════════════════════════════════════════════════════════════╗
║                                                               ║
║              ${colors.bright}DATABASE DEBUGGING TOOL${colors.reset}${colors.cyan}                    ║
║           ${colors.white}Comprehensive Database Diagnostics${colors.reset}${colors.cyan}              ║
║                                                               ║
╚═══════════════════════════════════════════════════════════════╝${colors.reset}
`;
  console.log(banner);
}

async function runComprehensiveCheck() {
  try {
    displayBanner();
    
    log('info', 'Starting comprehensive database diagnostics...');
    
    const validator = new DatabaseValidator();
    const results = await validator.validateDatabase();
    
    // Display results in organized sections
    console.log('\n' + colors.bright + '='.repeat(60) + colors.reset);
    console.log(colors.bright + 'DATABASE VALIDATION RESULTS' + colors.reset);
    console.log(colors.bright + '='.repeat(60) + colors.reset);
    
    // Overall Status
    const overallStatus = results.success ? 
      `${colors.green}✅ PASSED${colors.reset}` : 
      `${colors.red}❌ FAILED${colors.reset}`;
    console.log(`\nOverall Status: ${overallStatus}`);
    console.log(`Validation Duration: ${results.duration}ms\n`);
    
    // Connectivity Check
    console.log(colors.cyan + '📡 CONNECTIVITY CHECK' + colors.reset);
    if (results.connectivity?.success) {
      log('success', 'Database connection established');
      console.log(`   Database: ${results.connectivity.database}`);
      console.log(`   Host: ${results.connectivity.host}:${results.connectivity.port}`);
      console.log(`   Version: ${results.connectivity.version}`);
      console.log(`   Size: ${results.connectivity.size}`);
      console.log(`   SSL: ${results.connectivity.ssl}`);
      console.log(`   Pool: ${results.connectivity.pool.used}/${results.connectivity.pool.max} connections used`);
    } else {
      log('error', `Connection failed: ${results.connectivity?.error}`);
      if (results.connectivity?.troubleshooting) {
        console.log(colors.yellow + '   Troubleshooting tips:' + colors.reset);
        results.connectivity.troubleshooting.forEach(tip => 
          console.log(`   - ${tip}`)
        );
      }
    }
    
    // Migration Check
    console.log('\n' + colors.cyan + '📦 MIGRATION STATUS' + colors.reset);
    if (results.migrations?.success) {
      log('success', 'All migrations are up to date');
      console.log(`   Current Batch: ${results.migrations.currentBatch}`);
      console.log(`   Completed: ${results.migrations.completed} migrations`);
      console.log(`   Pending: ${results.migrations.pending} migrations`);
      
      if (results.migrations.autoRan) {
        log('info', `Auto-ran ${results.migrations.autoRan} pending migrations`);
      }
    } else {
      log('error', `Migration check failed: ${results.migrations?.error}`);
    }
    
    // Schema Check
    console.log('\n' + colors.cyan + '🗂️  SCHEMA VALIDATION' + colors.reset);
    if (results.schema?.success) {
      log('success', 'All required tables exist');
      console.log(`   Coverage: ${results.schema.coverage}`);
      console.log(`   Total Tables: ${results.schema.totalTables}`);
      
      // Table details
      console.log('\n   Table Details:');
      Object.entries(results.schema.tables).forEach(([tableName, info]) => {
        if (info.exists) {
          console.log(`   ✅ ${tableName} (${info.columns} columns, ${info.rows} rows)`);
        } else {
          console.log(`   ❌ ${tableName} - ${info.error}`);
        }
      });
      
      // Optional tables if available
      if (results.schema.optionalTables) {
        console.log('\n   Optional Tables:');
        Object.entries(results.schema.optionalTables).forEach(([tableName, info]) => {
          console.log(`   📦 ${tableName} (${info.columns} columns, ${info.rows} rows)`);
        });
      }
    } else {
      log('error', 'Schema validation failed');
      if (results.schema?.missingTables?.length > 0) {
        console.log(`   Missing tables: ${results.schema.missingTables.join(', ')}`);
      }
      if (results.schema?.troubleshooting) {
        console.log(colors.yellow + '   Troubleshooting tips:' + colors.reset);
        results.schema.troubleshooting.forEach(tip => 
          console.log(`   - ${tip}`)
        );
      }
    }
    
    // Seed Data Check
    console.log('\n' + colors.cyan + '🌱 SEED DATA STATUS' + colors.reset);
    if (results.seeds?.success) {
      log('success', results.seeds.message);
      
      if (results.seeds.autoSeeded) {
        log('info', 'Seed data was automatically populated');
      }
      
      Object.entries(results.seeds.checks).forEach(([checkName, check]) => {
        if (check.seeded) {
          console.log(`   ✅ ${checkName}: ${check.count || 'OK'}`);
        } else {
          console.log(`   ❌ ${checkName}: ${check.error || 'Not seeded'}`);
        }
      });
    } else {
      log('error', `Seed data check failed: ${results.seeds?.error}`);
    }
    
    // Integrity Check
    console.log('\n' + colors.cyan + '🔒 DATA INTEGRITY' + colors.reset);
    if (results.integrity?.success) {
      log('success', results.integrity.summary);
      
      results.integrity.checks.forEach(check => {
        if (check.passed) {
          console.log(`   ✅ ${check.name}: ${check.message}`);
        } else {
          console.log(`   ❌ ${check.name}: ${check.error || 'Failed'}`);
          if (check.violations?.length > 0) {
            check.violations.forEach(violation => 
              console.log(`      - ${violation}`)
            );
          }
        }
      });
    } else {
      log('error', `Integrity check failed: ${results.integrity?.error}`);
    }
    
    // Final Summary
    console.log('\n' + colors.bright + '='.repeat(60) + colors.reset);
    console.log(colors.bright + 'DEBUGGING SUMMARY' + colors.reset);
    console.log(colors.bright + '='.repeat(60) + colors.reset);
    
    if (results.success) {
      log('success', '🎉 All database checks passed! Your database is ready.');
    } else {
      log('error', '❌ Database validation failed. Please review the issues above.');
      
      // Provide actionable steps
      console.log('\n' + colors.yellow + 'Recommended Actions:' + colors.reset);
      
      if (!results.connectivity?.success) {
        console.log('1. Fix database connectivity issues first');
      }
      
      if (!results.migrations?.success) {
        console.log('2. Run database migrations: npm run db:migrate');
      }
      
      if (!results.schema?.success) {
        console.log('3. Ensure all required tables exist by running migrations');
      }
      
      if (!results.seeds?.success) {
        console.log('4. Populate seed data: npm run db:seed');
      }
      
      if (!results.integrity?.success) {
        console.log('5. Review and fix data integrity issues');
      }
    }
    
    console.log('');
    
  } catch (error) {
    log('error', `Debugging tool failed: ${error.message}`);
    console.error(error.stack);
    process.exit(1);
  }
}

// Command line interface
const command = process.argv[2];

switch (command) {
  case 'check':
  case undefined:
    runComprehensiveCheck();
    break;
  case 'help':
    console.log(`
Database Debugging Tool

Usage:
  node scripts/debug-database.js [command]

Commands:
  check (default)  Run comprehensive database diagnostics
  help            Show this help message

Examples:
  node scripts/debug-database.js
  node scripts/debug-database.js check
`);
    break;
  default:
    log('error', `Unknown command: ${command}`);
    log('info', 'Use "help" for available commands');
    process.exit(1);
}