require('dotenv').config()
const http = require('http')

const app = require('./app')
const botScore = require('./middleware/botScore')
const { ensureSchema, close } = require('./utils/db')
const { seedDefaults, createInitialAdminFromEnv } = require('../db/seed')
const settings = require('./model/settings/settings.model')
const mailer = require('./utils/mailer')
const createLogger = require('./utils/logger')
const pkg = require('../package.json')

const log = createLogger('server')
const PORT = Number(process.env.PORT) || 3000
const HOST = '0.0.0.0' // bind all interfaces so Pangolin / the LAN can reach it

async function start() {
  log.info(`starting UOMysticmoon server v${pkg.version}`, {
    node: process.version,
    env: process.env.NODE_ENV || 'development',
    logLevel: process.env.LOG_LEVEL || 'info',
    logFile: createLogger.logFilePath || 'disabled (console only)',
    db: `${process.env.DB_HOST || '127.0.0.1'}:${process.env.DB_PORT || 3306}/${process.env.DB_NAME || 'uomysticmoon'}`,
    cookieSecure: process.env.COOKIE_SECURE || 'auto',
    smtp: mailer.isConfigured() ? 'configured' : 'not configured (mailto fallback)',
  })

  log.info('ensuring database schema...')
  await ensureSchema()
  log.info('seeding defaults...')
  await seedDefaults()
  await createInitialAdminFromEnv()

  const mode = await settings.get('site_mode')
  log.info(`site mode: ${String(mode || 'live').toUpperCase()}`)

  const server = http.createServer(app)
  server.listen(PORT, HOST, () => {
    log.info(`listening on http://${HOST}:${PORT}  (API at /api/v1, health at /api/health)`)
  })

  setupShutdown(server)
}

function setupShutdown(server) {
  let closing = false
  const shutdown = async (signal) => {
    if (closing) return
    closing = true
    log.warn(`${signal} received — shutting down gracefully`)
    botScore.stopSweeper() // stop the bot-store cleanup interval
    server.close(() => log.info('http server closed'))
    try {
      await close()
      log.info('database pool closed')
    } catch (err) {
      log.error('error closing database pool', err)
    }
    await createLogger.close() // flush the log file
    process.exit(0)
  }

  process.on('SIGINT', () => shutdown('SIGINT'))
  process.on('SIGTERM', () => shutdown('SIGTERM'))
  process.on('unhandledRejection', (reason) => log.error('unhandledRejection', { reason: String(reason) }))
  process.on('uncaughtException', (err) => {
    log.error('uncaughtException', err)
    process.exit(1)
  })
}

start().catch((err) => {
  log.error('failed to start server', err)
  process.exit(1)
})