package controller

import (
	"fmt"
	"log"
	"net/http"
	"time"

	jwt "github.com/appleboy/gin-jwt/v2"
	"github.com/gin-contrib/pprof"
	"github.com/gin-gonic/gin"
	"github.com/hashicorp/go-uuid"
	swaggerfiles "github.com/swaggo/files"
	ginSwagger "github.com/swaggo/gin-swagger"

	docs "github.com/naiba/nezha/cmd/dashboard/docs"
	"github.com/naiba/nezha/model"
	"github.com/naiba/nezha/pkg/mygin"
	"github.com/naiba/nezha/pkg/utils"
	"github.com/naiba/nezha/proto"
	"github.com/naiba/nezha/service/rpc"
	"github.com/naiba/nezha/service/singleton"
)

// @title           Swagger Example API
// @version         1.0
// @description     This is a sample server celler server.
// @termsOfService  http://swagger.io/terms/

// @contact.name   API Support
// @contact.url    http://www.swagger.io/support
// @contact.email  support@swagger.io

// @license.name  Apache 2.0
// @license.url   http://www.apache.org/licenses/LICENSE-2.0.html

// @host      localhost:8080
// @BasePath  /api/v1

// @securityDefinitions.basic  BasicAuth

// @externalDocs.description  OpenAPI
// @externalDocs.url          https://swagger.io/resources/open-api/
func ServeWeb(port uint) *http.Server {
	gin.SetMode(gin.ReleaseMode)
	r := gin.Default()
	docs.SwaggerInfo.BasePath = "/api/v1"
	if singleton.Conf.Debug {
		gin.SetMode(gin.DebugMode)
		pprof.Register(r)
	}
	r.Use(natGateway)
	r.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerfiles.Handler))
	r.Use(mygin.RecordPath)
	routers(r)
	page404 := func(c *gin.Context) {
		mygin.ShowErrorPage(c, mygin.ErrInfo{
			Code:  http.StatusNotFound,
			Title: "该页面不存在",
			Msg:   "该页面内容可能已着陆火星",
			Link:  "/",
			Btn:   "返回首页",
		}, true)
	}
	r.NoRoute(page404)
	r.NoMethod(page404)

	srv := &http.Server{
		Addr:              fmt.Sprintf(":%d", port),
		ReadHeaderTimeout: time.Second * 5,
		Handler:           r,
	}
	return srv
}

func routers(r *gin.Engine) {
	authMiddleware, err := jwt.New(initParams())
	if err != nil {
		log.Fatal("JWT Error:" + err.Error())
	}

	// register middleware
	r.Use(handlerMiddleWare(authMiddleware))

	r.POST("/login", authMiddleware.LoginHandler)

	auth := r.Group("/auth", authMiddleware.MiddlewareFunc())
	auth.GET("/refresh_token", authMiddleware.RefreshHandler)

	// 通用页面
	cp := commonPage{r: r}
	cp.serve()
	// 游客页面
	gp := guestPage{r}
	gp.serve()
	// 会员页面
	mp := &memberPage{r}
	mp.serve()
	// API
	api := r.Group("api")
	{
		ma := &memberAPI{api}
		ma.serve()
	}
}

func natGateway(c *gin.Context) {
	natConfig := singleton.GetNATConfigByDomain(c.Request.Host)
	if natConfig == nil {
		return
	}

	singleton.ServerLock.RLock()
	server := singleton.ServerList[natConfig.ServerID]
	singleton.ServerLock.RUnlock()
	if server == nil || server.TaskStream == nil {
		c.Writer.WriteString("server not found or not connected")
		c.Abort()
		return
	}

	streamId, err := uuid.GenerateUUID()
	if err != nil {
		c.Writer.WriteString(fmt.Sprintf("stream id error: %v", err))
		c.Abort()
		return
	}

	rpc.NezhaHandlerSingleton.CreateStream(streamId)
	defer rpc.NezhaHandlerSingleton.CloseStream(streamId)

	taskData, err := utils.Json.Marshal(model.TaskNAT{
		StreamID: streamId,
		Host:     natConfig.Host,
	})
	if err != nil {
		c.Writer.WriteString(fmt.Sprintf("task data error: %v", err))
		c.Abort()
		return
	}

	if err := server.TaskStream.Send(&proto.Task{
		Type: model.TaskTypeNAT,
		Data: string(taskData),
	}); err != nil {
		c.Writer.WriteString(fmt.Sprintf("send task error: %v", err))
		c.Abort()
		return
	}

	w, err := utils.NewRequestWrapper(c.Request, c.Writer)
	if err != nil {
		c.Writer.WriteString(fmt.Sprintf("request wrapper error: %v", err))
		c.Abort()
		return
	}

	if err := rpc.NezhaHandlerSingleton.UserConnected(streamId, w); err != nil {
		c.Writer.WriteString(fmt.Sprintf("user connected error: %v", err))
		c.Abort()
		return
	}

	rpc.NezhaHandlerSingleton.StartStream(streamId, time.Second*10)
	c.Abort()
}