import { exec } from 'child_process'
import path from 'path'
import { promisify } from 'util'

const execAsync = promisify(exec)

export async function createDatabaseBackup(): Promise<string> {
  const dbPath = path.join(process.cwd(), 'database', 'antihoax.db')
  const backupPath = path.join(process.cwd(), 'backups', `backup_${Date.now()}.db`)
  
  try {
    // Ensure backup directory exists
    await execAsync('mkdir -p backups')
    
    // Create SQLite backup using .backup command
    await execAsync(`sqlite3 "${dbPath}" ".backup '${backupPath}'"`)
    
    return backupPath
  } catch (error) {
    console.error('Backup failed:', error)
    throw new Error('Database backup failed')
  }
}

export async function restoreDatabase(backupPath: string): Promise<void> {
  const dbPath = path.join(process.cwd(), 'database', 'antihoax.db')
  
  try {
    // Create backup of current DB first
    await createDatabaseBackup()
    
    // Copy backup to main location
    await execAsync(`cp "${backupPath}" "${dbPath}"`)
    
    console.log('Database restored successfully')
  } catch (error) {
    console.error('Restore failed:', error)
    throw new Error('Database restore failed')
  }
}

export async function listBackups(): Promise<string[]> {
  try {
    const { stdout } = await execAsync('ls -la backups/*.db 2>/dev/null || true')
    return stdout.trim() ? stdout.trim().split('\n') : []
  } catch {
    return []
  }
}