import Event from '../../models/event.js'
import { connectDB } from '../../utils/mongoose.js'

export default defineEventHandler(async (event) => {
  try {
    // Ensure database connection
    await connectDB()
    // Get query parameters for filtering
    const query = getQuery(event)
    const filter = {}
    
    // Only show visible events on public calendar (unless specifically requested)
    if (query.includeHidden !== 'true') {
      filter.isVisible = true
    }
    
    // Filter for upcoming events only if requested
    if (query.upcoming === 'true') {
      filter.startDate = { $gte: new Date() }
    }
    
    // Filter by event type if provided
    if (query.eventType) {
      filter.eventType = query.eventType
    }
    
    // Filter for members-only events
    if (query.membersOnly !== undefined) {
      filter.membersOnly = query.membersOnly === 'true'
    }
    
    // Fetch events from database
    const events = await Event.find(filter)
      .sort({ startDate: 1 })
      .select('-registrations') // Don't expose registration details in list view
      .lean()
    
    // Add computed fields
    const eventsWithMeta = events.map(event => ({
      ...event,
      id: event._id.toString(),
      registeredCount: event.registrations?.length || 0
    }))
    
    return eventsWithMeta
  } catch (error) {
    console.error('Error fetching events:', error)
    throw createError({
      statusCode: 500,
      statusMessage: 'Failed to fetch events'
    })
  }
})