import 'dotenv/config'
import path from 'node:path'
import fs from 'node:fs'
import express from 'express'
import cors from 'cors'
import otaRouter from './routes/ota.js'

// 默认 3002: 与 iboard (3001) 同机部署时不冲突
const PORT = Number(process.env.PORT) || 3002
const DIST_DIR = path.join(process.cwd(), 'dist')
const HAS_DIST = fs.existsSync(DIST_DIR)

const app = express()
app.use(cors())
app.use(express.json())

// 健康检查
app.get('/api/health', (_req, res) => res.json({ ok: true, ts: Date.now() }))

// OTA 接口公开 (检查/下载更新不需要登录), 必须挂载在最前面
app.use('/api', otaRouter)

// 静态资源 (Vite build 产物)
if (HAS_DIST) {
  app.use(express.static(DIST_DIR, { index: false, maxAge: '1h', etag: true }))

  // SPA fallback: 非 /api/* 的请求一律返回 index.html, 由前端路由处理
  app.get(/^\/(?!api\/).*/, (_req, res, next) => {
    const indexHtml = path.join(DIST_DIR, 'index.html')
    if (!fs.existsSync(indexHtml)) return next()
    res.sendFile(indexHtml)
  })
}

// 统一错误处理
app.use((err, _req, res, _next) => {
  console.error('[api error]', err)
  res.status(500).json({ error: err.message || '服务器内部错误' })
})

app.listen(PORT, () => {
  console.log(`[wardrobe-api] listening on http://127.0.0.1:${PORT}`)
  console.log(`[wardrobe-api] static dist: ${HAS_DIST ? DIST_DIR : '(not built, API only)'}`)
})