#!/usr/bin/env node
/**
 * Comprehensive D1 Database Management Script
 * 
 * Usage Examples:
 *   node scripts/d1-manager.js tables
 *   node scripts/d1-manager.js schema Company
 *   node scripts/d1-manager.js count User
 *   node scripts/d1-manager.js query "SELECT * FROM User LIMIT 5"
 *   node scripts/d1-manager.js backup
 *   node scripts/d1-manager.js --remote query "SELECT COUNT(*) FROM Session"
 */

import { execSync } from 'child_process';
import { writeFileSync, mkdirSync } from 'fs';
import { join } from 'path';

const DB_NAME = 'd1-notso-livedash';
const args = process.argv.slice(2);

// Parse flags
const isRemote = args.includes('--remote');
const filteredArgs = args.filter(arg => !arg.startsWith('--'));

if (filteredArgs.length === 0) {
    showHelp();
    process.exit(1);
}

const command = filteredArgs[ 0 ];
const params = filteredArgs.slice(1);

function showHelp() {
    console.log(`
🗄️  D1 Database Manager for ${DB_NAME}

Usage: node scripts/d1-manager.js [--remote] <command> [params...]

Commands:
  info                     Show database information
  tables                   List all tables
  schema <table>           Show table schema
  count <table>            Count rows in table
  query "<sql>"            Execute custom SQL query
  backup [filename]        Export database to SQL file
  backup-schema            Export just the schema
  recent-logs              Show recent query activity

Flags:
  --remote                 Execute against remote D1 (production)

Examples:
  node scripts/d1-manager.js tables
  node scripts/d1-manager.js schema User
  node scripts/d1-manager.js count Company
  node scripts/d1-manager.js query "SELECT * FROM User WHERE role = 'admin'"
  node scripts/d1-manager.js backup
  node scripts/d1-manager.js --remote info
`);
}

function execute(sql, silent = false) {
    const remoteFlag = isRemote ? '--remote' : '';
    const cmd = `npx wrangler d1 execute ${DB_NAME} ${remoteFlag} --command "${sql}"`;

    if (!silent) {
        console.log(`🔍 Executing${isRemote ? ' (remote)' : ' (local)'}: ${sql}\\n`);
    }

    try {
        return execSync(cmd, { encoding: 'utf8' });
    } catch (error) {
        console.error('❌ Query failed:', error.message);
        process.exit(1);
    }
}

function wranglerCommand(subcommand, silent = false) {
    const remoteFlag = isRemote ? '--remote' : '';
    const cmd = `npx wrangler d1 ${subcommand} ${DB_NAME} ${remoteFlag}`;

    if (!silent) {
        console.log(`📊 Running: ${cmd}\\n`);
    }

    try {
        return execSync(cmd, { stdio: 'inherit' });
    } catch (error) {
        console.error('❌ Command failed:', error.message);
        process.exit(1);
    }
}

switch (command) {
    case 'info':
        wranglerCommand('info');
        break;

    case 'tables':
        console.log('📋 Listing all tables:\\n');
        execute("SELECT name, type FROM sqlite_master WHERE type IN ('table', 'view') AND name NOT LIKE 'sqlite_%' ORDER BY name;");
        break;

    case 'schema':
        if (!params[ 0 ]) {
            console.error('❌ Please specify a table name');
            console.log('Usage: node scripts/d1-manager.js schema <table_name>');
            process.exit(1);
        }
        console.log(`🏗️  Schema for table '${params[ 0 ]}':\\n`);
        execute(`PRAGMA table_info(${params[ 0 ]});`);
        break;

    case 'count':
        if (!params[ 0 ]) {
            console.error('❌ Please specify a table name');
            console.log('Usage: node scripts/d1-manager.js count <table_name>');
            process.exit(1);
        }
        console.log(`🔢 Row count for table '${params[ 0 ]}':\\n`);
        execute(`SELECT COUNT(*) as row_count FROM ${params[ 0 ]};`);
        break;

    case 'query':
        if (!params[ 0 ]) {
            console.error('❌ Please specify a SQL query');
            console.log('Usage: node scripts/d1-manager.js query "SELECT * FROM table"');
            process.exit(1);
        }
        execute(params[ 0 ]);
        break;

    case 'backup':
        const timestamp = new Date().toISOString().replace(/[:.]/g, '-').slice(0, 19);
        const filename = params[ 0 ] || `backup_${timestamp}.sql`;

        try {
            mkdirSync('backups', { recursive: true });
        } catch (e) {
            // Directory might already exist
        }

        const backupPath = join('backups', filename);
        console.log(`💾 Creating backup: ${backupPath}\\n`);
        wranglerCommand(`export --output ${backupPath}`);
        console.log(`\\n✅ Backup created successfully: ${backupPath}`);
        break;

    case 'backup-schema':
        try {
            mkdirSync('backups', { recursive: true });
        } catch (e) {
            // Directory might already exist
        }

        console.log('📜 Exporting schema only...\\n');
        wranglerCommand('export --no-data --output backups/schema.sql');
        console.log('\\n✅ Schema exported to backups/schema.sql');
        break;

    case 'recent-logs':
        console.log('📊 Recent database activity:\\n');
        try {
            wranglerCommand('insights');
        } catch (error) {
            console.log('ℹ️  Insights not available for this database');
        }
        break;

    case 'all-tables-info':
        console.log('📊 Information about all tables:\\n');
        const tables = [ 'Company', 'User', 'Session' ];
        for (const table of tables) {
            console.log(`\\n🏷️  Table: ${table}`);
            console.log('─'.repeat(50));
            execute(`SELECT COUNT(*) as row_count FROM ${table};`);
        }
        break;

    default:
        console.error(`❌ Unknown command: ${command}`);
        showHelp();
        process.exit(1);
}