package router

import (
	"time"

	"github.com/freefire/jiang13-bbs/config"
	"github.com/freefire/jiang13-bbs/handler"
	"github.com/freefire/jiang13-bbs/middleware"
	"github.com/freefire/jiang13-bbs/model"
	"github.com/freefire/jiang13-bbs/service"
	"github.com/gin-contrib/cors"
	"github.com/gin-gonic/gin"
)

// Setup 初始化路由
func Setup(cfg *config.Config) (*gin.Engine, error) {
	if cfg.DevMode {
		gin.SetMode(gin.DebugMode)
	} else {
		gin.SetMode(gin.ReleaseMode)
	}

	r := gin.New()
	r.Use(gin.Recovery())
	r.Use(gin.Logger())

	// 全局安全响应头
	r.Use(middleware.SecurityHeaders())

	// CORS
	r.Use(cors.New(cors.Config{
		AllowOrigins:     []string{"http://localhost:3000", "http://127.0.0.1:3000"},
		AllowMethods:     []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
		AllowHeaders:     []string{"Origin", "Content-Type", "Authorization", "X-CSRF-Token"},
		AllowCredentials: true,
		MaxAge:           12 * time.Hour,
	}))

	// 服务
	authSvc := service.NewAuthService(model.DB, cfg.JWTSecret)
	boardSvc := service.NewBoardService(model.DB)
	postSvc := service.NewPostService(model.DB)
	commentSvc := service.NewCommentService(model.DB)
	likeSvc := service.NewLikeService(model.DB)
	notifSvc := service.NewNotificationService(model.DB)
	limiter := service.DefaultRateLimiter()

	h := &handler.Handlers{
		Cfg:          cfg,
		Auth:         authSvc,
		Board:        boardSvc,
		Post:         postSvc,
		Comment:      commentSvc,
		Like:         likeSvc,
		Notification: notifSvc,
	}

	authMW := middleware.NewAuthMiddleware(authSvc)

	// 健康检查 & SEO
	r.GET("/health", h.Health)
	r.GET("/robots.txt", h.RobotsTxt)
	r.GET("/sitemap.xml", h.SitemapXML)

	// 公开 API（可选登录）
	pubAPI := r.Group("/api", authMW.OptionalAuth())
	{
		pubAPI.GET("/me", h.Me)
		pubAPI.GET("/boards", h.Boards)
		pubAPI.GET("/posts", h.Posts)
		pubAPI.GET("/posts/:id", h.PostDetail)
		pubAPI.GET("/posts/:id/comments", h.PostComments)
		pubAPI.GET("/users/:id", h.UserProfile)
		pubAPI.GET("/users/:id/comments", h.UserComments)
		pubAPI.POST("/register", middleware.RateLimitMiddleware(limiter, service.RateRegister), h.Register)
		pubAPI.POST("/login", middleware.RateLimitMiddleware(limiter, service.RateLogin), h.Login)
		// refresh token 端点：access 过期后用 refresh 换新 token（需 CSRF 防护）
		pubAPI.POST("/auth/refresh", middleware.CSRFMiddleware(), h.Refresh)
	}

	// 需登录 API（先鉴权，再 CSRF 防护）
	api := r.Group("/api", authMW.RequireAuth(), middleware.CSRFMiddleware())
	{
		api.POST("/logout", h.Logout)
		api.POST("/change-password", h.ChangePassword)
		api.POST("/posts", middleware.RateLimitMiddleware(limiter, service.RatePost), h.CreatePost)
		api.PUT("/posts/:id", h.UpdatePost)
		api.DELETE("/posts/:id", h.DeletePost)
		api.PUT("/posts/:id/pin", h.TogglePin)
		api.PUT("/posts/:id/recommend", h.ToggleRecommend)
		api.POST("/posts/:id/like", h.ToggleLike)
		api.POST("/posts/:id/comments", middleware.RateLimitMiddleware(limiter, service.RateComment), h.CreateComment)
		api.DELETE("/posts/:id/comments/:cid", h.DeleteComment)
		// 通知
		api.GET("/notifications", h.Notifications)
		api.GET("/notifications/unread-count", h.UnreadCount)
		api.PUT("/notifications/:id/read", h.MarkRead)
		api.PUT("/notifications/read-all", h.MarkAllRead)
	}

	// 管理员 API（同样需要 CSRF 防护）
	adminAPI := r.Group("/api/admin", authMW.RequireAuth(), middleware.CSRFMiddleware(), authMW.RequireAdmin())
	{
		adminAPI.GET("/dashboard", func(c *gin.Context) {
			c.JSON(200, gin.H{"message": "admin dashboard"})
		})
	}

	r.NoRoute(func(c *gin.Context) {
		c.JSON(404, gin.H{"error": "not found"})
	})

	return r, nil
}