import createError from 'http-errors'

import express from 'express'

import path from 'path'

import logger from 'morgan'

import cors from 'cors'

import session from 'express-session'

import { RedisStore } from 'connect-redis'

import Redis from 'ioredis'

import cookieParser from 'cookie-parser'

import indexRouter from './routes/index'

import userRouter from './routes/userRouter'

import accountRouter from './routes/accountRouter'

import { config } from 'dotenv'

// mongodb数据库连接
import { connectMongoDB } from './config/mongodbConfig'

import { HTTP_STATUS } from './common/constant/httpStatus'

import loginUtil from './utils/loginUtil'

config()
// 初始化 Redis 客户端
const redisClient = new Redis({
  host: process.env.REDIS_HOST,
  port: process.env.REDIS_PORT || 6379,
  password: process.env.REDIS_PASSWORD,
  db: 0
})

const app = express()

app.use(logger('dev'))
app.use(express.json())
app.use(express.urlencoded({ extended: false }))
app.use(express.static(path.join(__dirname, 'public')))
app.use(cookieParser())
app.use(
  session({
    name: 'identityKey',
    store: new RedisStore({ client: redisClient }),
    secret: process.env.SESSION_SECRET,
    resave: false,
    saveUninitialized: false,
    cookie: {
      httpOnly: true,
      maxAge: 24 * 60 * 60 * 1000
    }
  })
)

const corsOptions = {
  origin: 'http://localhost:5173', // 指定允许的源
  credentials: true, // 允许发送凭据（如 cookies）
  optionsSuccessStatus: 200
}

app.use(cors(corsOptions))

async function startServer() {
  try {
    await connectMongoDB()
  } catch (error) {
    console.error('Server error:', error)
    process.exit(1)
  }
}

startServer().then((r) => logger(r))

app.use('/', indexRouter)
app.use('/user', loginUtil.authenticateSession, userRouter)
app.use('/account', accountRouter)

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404))
})

// error handler
app.use(function (err, req, res) {
  // set locals, only providing error in development
  res.locals.message = err.message
  res.locals.error = req.app.get('env') === 'development' ? err : {}

  // render the error page
  res.status(err.status || HTTP_STATUS.INTERNAL_SERVER_ERROR)
  res.json({
    error: true,
    message: err.message || 'Something went wrong',
    // 只在开发环境下返回堆栈信息
    ...(req.app.get('env') === 'development' ? { stack: err.stack } : {})
  })
})

module.exports = app