import express from 'express'
import cors from 'cors'
import helmet from 'helmet'
import morgan from 'morgan'
import compression from 'compression'
import { errorHandler } from './middleware/errorHandler'
import { apiLimiter } from './middleware/rateLimit'

const app = express()

app.set('trust proxy', 1)

app.use(helmet())
app.use(compression({
  filter: (req, res) => {
    // SSE 流式响应不压缩，避免缓冲导致前端一次性收到所有数据
    if (req.headers['accept'] === 'text/event-stream' || res.getHeader('Content-Type') === 'text/event-stream') {
      return false
    }
    return compression.filter(req, res)
  },
}))
app.use(
  cors({
    origin: process.env.CORS_ORIGIN || 'http://localhost:5173',
    credentials: true,
  }),
)
app.use(express.json({ limit: '10mb' }))
app.use(morgan('dev'))

app.get('/health', (_req, res) => {
  res.json({ success: true, data: { status: 'ok', timestamp: new Date().toISOString() } })
})

app.use('/api/v1', apiLimiter)

// 路由挂载
import authRoutes from './routes/auth.routes'
import dashboardRoutes from './routes/dashboard.routes'
import employeeRoutes from './routes/employee.routes'
import terminationRoutes from './routes/termination.routes'
import aiRoutes from './routes/ai.routes'
import portalRoutes from './routes/portal.routes'
import settingsRoutes from './routes/settings.routes'
import payrollRoutes from './routes/payroll.routes'
import payroll2Routes from './routes/payroll2.routes'
import socialRoutes from './routes/social.routes'
import notificationRoutes from './routes/notification.routes'
import attachmentRoutes from './routes/attachment.routes'
import rosterRoutes from './routes/roster.routes'
import exportRoutes from './routes/export.routes'
import importRoutes from './routes/import.routes'
import evidenceRoutes from './routes/evidence.routes'
import policyRoutes from './routes/policy.routes'
import attendanceRoutes from './routes/attendance.routes'
import templateRoutes from './routes/template.routes'
import auditRoutes from './routes/audit.routes'
import calendarRoutes from './routes/calendar.routes'
import platformRoutes from './routes/platform.routes'
import workProcessRoutes from './routes/work-process.routes'
import enterpriseTemplateRoutes from './routes/enterprise-template.routes'
import specialStatusRoutes from './routes/special-status.routes'
app.use('/api/v1/auth', authRoutes)
app.use('/api/v1/dashboard', dashboardRoutes)
app.use('/api/v1/employees', employeeRoutes)
app.use('/api/v1/termination', terminationRoutes)
app.use('/api/v1/ai', aiRoutes)
app.use('/api/v1/portal', portalRoutes)
app.use('/api/v1/settings', settingsRoutes)
app.use('/api/v1/payroll', payrollRoutes)
app.use('/api/v1/payroll2', payroll2Routes)
app.use('/api/v1/social', socialRoutes)
app.use('/api/v1/notifications', notificationRoutes)
app.use('/api/v1/attachments', attachmentRoutes)
app.use('/api/v1/roster', rosterRoutes)
app.use('/api/v1/export', exportRoutes)
app.use('/api/v1/import', importRoutes)
app.use('/api/v1/evidence', evidenceRoutes)
app.use('/api/v1/policies', policyRoutes)
app.use('/api/v1/attendance', attendanceRoutes)
app.use('/api/v1/templates', templateRoutes)
app.use('/api/v1/audit', auditRoutes)
app.use('/api/v1/calendar', calendarRoutes)
app.use('/api/v1/platform', platformRoutes)
app.use('/api/v1/work-processes', workProcessRoutes)
app.use('/api/v1/enterprise-templates', enterpriseTemplateRoutes)
app.use('/api/v1/special-statuses', specialStatusRoutes)

app.use(errorHandler)

// RAG 知识库自动初始化（异步，不阻塞启动）
import { seedKnowledgeBase } from './services/rag.service'
seedKnowledgeBase().catch((err) => {
  console.warn('[RAG] 知识库初始化失败，AI 问答将不使用 RAG 检索:', err?.message || err)
})

export default app