/**
 * AiWorker Backend - Main Entry Point
 * Using Bun.serve() native API
 */

import { runMigrations } from './db/migrate'
import { testConnection } from './db/client'
import { handleProjectRoutes, handleTaskRoutes, handleAgentRoutes } from './api/routes'

console.log('🚀 Starting AiWorker Backend...')
console.log(`Bun version: ${Bun.version}`)
console.log(`Environment: ${process.env.NODE_ENV || 'development'}`)

// Run migrations on startup
await runMigrations()

// Test database connection
await testConnection()

const PORT = process.env.PORT || 3000

// Health check route
function handleHealthCheck() {
  return Response.json({
    status: 'ok',
    timestamp: new Date().toISOString(),
    version: '1.0.0',
    bun: Bun.version,
  })
}

// Main server
const server = Bun.serve({
  port: PORT,

  async fetch(req) {
    const url = new URL(req.url)

    // Health check
    if (url.pathname === '/api/health') {
      return handleHealthCheck()
    }

    // API routes
    if (url.pathname.startsWith('/api/projects')) {
      return handleProjectRoutes(req, url)
    }

    if (url.pathname.startsWith('/api/tasks')) {
      return handleTaskRoutes(req, url)
    }

    if (url.pathname.startsWith('/api/agents')) {
      return handleAgentRoutes(req, url)
    }

    // Generic API info
    if (url.pathname.startsWith('/api/')) {
      return Response.json({
        message: 'AiWorker API',
        version: '1.0.0',
        endpoints: [
          'GET /api/health',
          'GET /api/projects',
          'GET /api/projects/:id',
          'POST /api/projects',
          'PATCH /api/projects/:id',
          'DELETE /api/projects/:id',
          'GET /api/tasks',
          'GET /api/tasks/:id',
          'POST /api/tasks',
          'PATCH /api/tasks/:id',
          'POST /api/tasks/:id/respond',
          'DELETE /api/tasks/:id',
          'GET /api/agents',
          'GET /api/agents/:id',
          'POST /api/agents',
          'PATCH /api/agents/:id',
          'POST /api/agents/:id/heartbeat',
          'DELETE /api/agents/:id',
        ],
      })
    }

    // Root
    if (url.pathname === '/') {
      return new Response('AiWorker Backend - Running on Bun 🚀', {
        headers: { 'Content-Type': 'text/plain' }
      })
    }

    // 404
    return new Response('Not Found', { status: 404 })
  },

  // WebSocket support
  websocket: {
    open(ws) {
      console.log('WebSocket client connected')
      ws.send(JSON.stringify({ type: 'connected', timestamp: Date.now() }))
    },
    message(ws, message) {
      console.log('WebSocket message:', message)
      // Echo back for now
      ws.send(message)
    },
    close(ws) {
      console.log('WebSocket client disconnected')
    },
  },

  // Development mode
  development: process.env.NODE_ENV === 'development',
})

console.log(`✅ Server listening on http://localhost:${server.port}`)
console.log(`📊 Health check: http://localhost:${server.port}/api/health`)