import { Hono } from 'hono'
import { cors } from 'hono/cors'
import { logger } from 'hono/logger'
import { serve } from 'bun'
import { fetchRequestHandler } from '@trpc/server/adapters/fetch'
import { appRouter } from '@/src/trpc/router'
import { verifyToken, UserJWTPayload, StaffJWTPayload } from '@/src/lib/jwt-utils'
import { db } from '@/src/db/db_index'
import { staffUsers, userDetails } from '@/src/db/schema'
import { eq } from 'drizzle-orm'
import { TRPCError } from '@trpc/server'
import signedUrlCache from '@/src/lib/signed-url-cache'
import { seed } from '@/src/db/seed'
import initFunc from '@/src/lib/init'
import '@/src/jobs/jobs-index'
import { startAutomatedJobs } from '@/src/lib/automatedJobs'

// Initialize
seed()
initFunc()
startAutomatedJobs()

const app = new Hono()

// CORS middleware
app.use('*', cors({
  origin: ['http://localhost:5174', 'http://localhost:5173'],
  allowMethods: ['GET', 'POST', 'PUT', 'PATCH', 'DELETE', 'OPTIONS'],
  allowHeaders: ['Origin', 'X-Requested-With', 'Content-Type', 'Accept', 'Authorization'],
  credentials: true
}))

// Request logging
app.use('*', logger())

// Health check
app.get('/health', (c) => {
  return c.json({
    status: 'OK',
    timestamp: new Date().toISOString(),
    uptime: process.uptime(),
    message: 'Hello world'
  })
})

// tRPC handler with context
app.use('/api/trpc/*', async (c) => {
  const response = await fetchRequestHandler({
    endpoint: '/api/trpc',
    req: c.req.raw,
    router: appRouter,
    createContext: async ({ req }) => {
      let user = null
      let staffUser = null
      const authHeader = req.headers.get('authorization')
      
      if (authHeader?.startsWith('Bearer ')) {
        const token = authHeader.substring(7)
        try {
          const decoded = await verifyToken(token)
          
          if ('staffId' in decoded) {
            const staffPayload = decoded as StaffJWTPayload
            const staff = await db.query.staffUsers.findFirst({
              where: eq(staffUsers.id, staffPayload.staffId)
            })
            if (staff) {
              staffUser = { id: staff.id, name: staff.name }
            }
          } else {
            const userPayload = decoded as UserJWTPayload
            user = {
              userId: userPayload.userId,
              name: userPayload.name,
              email: userPayload.email,
              mobile: userPayload.mobile
            }
            
            const details = await db.query.userDetails.findFirst({
              where: eq(userDetails.userId, userPayload.userId)
            })
            
            if (details?.isSuspended) {
              throw new TRPCError({
                code: 'FORBIDDEN',
                message: 'Account suspended'
              })
            }
          }
        } catch {
          // Invalid token
        }
      }
      
      return { req, res: c.res, user, staffUser }
    },
    onError: ({ error, path, ctx }) => {
      console.error('🚨 tRPC Error:', {
        path,
        code: error.code,
        message: error.message,
        userId: ctx?.user?.userId
      })
    }
  })
  
  return response
})

// Static files - Fallback UI
app.use('/*', async (c) => {
  const url = new URL(c.req.url)
  let filePath = url.pathname
  
  // Default to index.html for root
  if (filePath === '/') {
    filePath = '/index.html'
  }
  
  // Try to serve the file
  const file = Bun.file(`./fallback-ui/dist${filePath}`)
  if (await file.exists()) {
    return new Response(file)
  }
  
  // SPA fallback - serve index.html for any unmatched routes
  const indexFile = Bun.file('./fallback-ui/dist/index.html')
  if (await indexFile.exists()) {
    return new Response(indexFile)
  }
  
  return c.notFound()
})

// Static files - Assets
app.use('/assets/*', async (c) => {
  const path = c.req.path.replace('/assets/', '')
  const file = Bun.file(`./assets/public/${path}`)
  
  if (await file.exists()) {
    return new Response(file)
  }
  
  return c.notFound()
})

// Global error handler
app.onError((err, c) => {
  console.error('Error:', err)
  
  const status = err instanceof TRPCError 
    ? (err.code === 'UNAUTHORIZED' ? 401 : 500)
    : 500
    
  const message = err.message || 'Internal Server Error'
  
  return c.json({ message }, status)
})

// Start server
serve({
  fetch: app.fetch,
  port: 4000,
  hostname: '0.0.0.0'
})

console.log('🚀 Server running on http://localhost:4000')