import Fastify from 'fastify'
import cookie from '@fastify/cookie'
import cors from '@fastify/cors'
import multipart from '@fastify/multipart'
import staticFiles from '@fastify/static'
import { fileURLToPath } from 'url'
import { dirname, join } from 'path'
import { initDb } from './db.js'
import { connect as connectMqtt } from './lib/mqtt.js'
import { startScheduler } from './lib/scheduler.js'
import { startAcPoller } from './lib/ac-poller.js'
import { zoneRoutes } from './routes/zones.js'
import { deviceRoutes } from './routes/devices.js'
import { statusRoutes } from './routes/status.js'
import { overrideRoutes } from './routes/override.js'
import { configRoutes } from './routes/config.js'
import { settingsRoutes } from './routes/settings.js'
import { mhiGatewayRoutes } from './routes/mhi-gateways.js'

const __dirname = dirname(fileURLToPath(import.meta.url))
const UPLOADS_DIR = join(__dirname, '..', 'uploads')

const app = Fastify({ logger: true, trustProxy: true })
const startedAt = Date.now()

await app.register(cookie)
await app.register(cors, {
  origin: process.env.CORS_ORIGIN || false,
  credentials: true,
})
await app.register(multipart, { limits: { fileSize: 10 * 1024 * 1024 } })
await app.register(staticFiles, {
  root: UPLOADS_DIR,
  prefix: '/api/uploads/',
  decorateReply: false,
})

app.get('/health', async () => ({ status: 'healthy', version: process.env.BUILD_VERSION || String(startedAt) }))

await app.register(zoneRoutes)
await app.register(deviceRoutes, { uploadsDir: UPLOADS_DIR })
await app.register(statusRoutes)
await app.register(overrideRoutes)
await app.register(configRoutes)
await app.register(settingsRoutes)
await app.register(mhiGatewayRoutes)

try {
  await initDb()

  // MQTT broker (shared infra, LXC 104) may not exist yet — connect() handles that
  // gracefully with its own backoff and never blocks startup.
  connectMqtt().catch(err => app.log.warn(`MQTT connect failed at startup: ${err.message}`))

  await startScheduler()
  await startAcPoller().catch(err => app.log.warn(`AC poller failed to start: ${err.message}`))
  await app.listen({ port: 3001, host: '0.0.0.0' })
} catch (err) {
  app.log.error(err)
  process.exit(1)
}