import mysql from 'mysql2/promise'

async function getDbConnection() {
  if (!process.env.MYSQL_HOST) return null
  return await mysql.createConnection({
    host: process.env.MYSQL_HOST,
    user: process.env.MYSQL_USER,
    password: process.env.MYSQL_PASSWORD,
    database: process.env.MYSQL_DATABASE,
  })
}

export async function GET(request) {
  try {
    const { searchParams } = new URL(request.url)
    const eventId = searchParams.get('id')
    
    const connection = await getDbConnection()
    if (!connection) {
      return Response.json({ error: 'Database not configured' }, { status: 500 })
    }

    if (eventId) {
      // Get specific event with tickets
      const [eventRows] = await connection.execute(
        'SELECT * FROM events WHERE id = ?',
        [eventId]
      )
      
      const [ticketRows] = await connection.execute(
        'SELECT * FROM tickets WHERE event_id = ? ORDER BY price ASC',
        [eventId]
      )

      if (eventRows.length === 0) {
        return Response.json({ error: 'Event not found' }, { status: 404 })
      }

      await connection.end()

      return Response.json({
        event: eventRows[0],
        tickets: ticketRows
      })
    } else {
      // Get all events
      const [eventRows] = await connection.execute(
        'SELECT e.*, COUNT(t.id) as ticket_types FROM events e LEFT JOIN tickets t ON e.id = t.event_id GROUP BY e.id ORDER BY e.created_at DESC'
      )

      await connection.end()

      return Response.json({ events: eventRows })
    }
  } catch (error) {
    console.error('Events API error:', error)
    return Response.json({ error: 'Internal server error' }, { status: 500 })
  }
}