package service

import (
	"archive/zip"
	"errors"
	"fmt"
	"github.com/gin-gonic/gin"
	"io"
	"log"
	"net/http"
	"os"
	"path/filepath"
	"work_cation/cfg"
	"work_cation/global"
	"work_cation/models"
	"work_cation/repo"
)

type ServerService struct {
	Status string
	server *http.Server
	Router *gin.Engine
}

const (
	StatusOnline  = "online"
	StatusOffline = "offline"
)

var Server = &ServerService{Status: StatusOffline}

func (s *ServerService) Online() error {
	if s.Status == StatusOnline {
		return nil
	}
	// 启动服务发现
	user := repo.User.GetUserInfo(global.DB)
	if err := Zeroconf.Register(user); err != nil {
		return err
	}
	// 修改状态
	s.Status = StatusOnline
	return nil
}

func (s *ServerService) StatusOffline() error {
	//if err := s.server.Close(); err != nil {
	//	return err
	//}
	// 关闭服务发现
	Zeroconf.Close()
	// 修改状态
	s.Status = StatusOffline
	return nil
}

func (s *ServerService) StartListenServer() error {
	router := gin.Default()
	s.Router = router
	router.GET("/user", func(c *gin.Context) {
		user := repo.User.GetUserInfo(global.DB)
		c.JSON(200, user)
	})
	router.GET("/cards", func(c *gin.Context) {
		cards := repo.BaseCard.FindAll(global.DB)
		c.JSON(200, cards)
	})
	router.GET("/download/card/:uuid", func(c *gin.Context) {
		uuid := c.Param("uuid")
		card := repo.BaseCard.Find(global.DB, uuid)
		if card.UUID == "" {
			c.JSON(404, nil)
			return
		}
		cardPath := filepath.Join(cfg.T.CardDir, card.UUID)
		// 设置响应头
		c.Header("Content-Disposition", fmt.Sprintf("attachment; filename=%s.zip", uuid))
		c.Header("Content-Type", "application/zip")
		err := zipFolder(cardPath, c.Writer)
		if err != nil {
			c.JSON(500, err)
			return
		}
	})

	router.POST("/chat", func(c *gin.Context) {
		user, msg, is := PublicPostCheck(c)
		if !is {
			return
		}
		message := &models.Message{
			Cmd:  "chat",
			User: *user,
			ChatMessage: *models.NewTextChatMsg(
				&user.Users,
				repo.User.GetUserInfo(global.DB).ID,
				msg["text"].(string)),
		}
		global.Send.SendChan <- message
		c.JSON(200, gin.H{"message": "ok"})
	})

	srv := &http.Server{
		Addr:    cfg.T.ServerAddr,
		Handler: router,
	}

	go func() {
		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
			log.Fatalf("listen: %s\n", err)
		}
	}()
	s.server = srv
	return nil
}

func zipFolder(folderPath string, zipFile io.Writer) error {
	zipWriter := zip.NewWriter(zipFile)
	defer zipWriter.Close()
	err := filepath.Walk(folderPath, func(filePath string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}

		header, err := zip.FileInfoHeader(info)
		if err != nil {
			return err
		}

		header.Name, err = filepath.Rel(folderPath, filePath)
		if err != nil {
			return err
		}

		if info.IsDir() {
			header.Name += "/"
		} else {
			header.Method = zip.Deflate
		}

		writer, err := zipWriter.CreateHeader(header)
		if err != nil {
			return err
		}

		if !info.IsDir() {
			file, err := os.Open(filePath)
			if err != nil {
				return err
			}
			defer file.Close()
			_, err = io.Copy(writer, file)
			if err != nil {
				return err
			}
		}
		return nil
	})

	if err != nil {
		return err
	}

	return nil
}

func PublicPostCheck(c *gin.Context) (*models.UserFollows, map[string]interface{}, bool) {
	uuid := c.GetHeader("User-User")
	user := repo.UserFollow.GetUser(global.DB, uuid)
	if user.Ip != c.ClientIP() {
		c.JSON(200, gin.H{"message": "对方未关注你"})
		return nil, nil, false
	}
	var msg = make(map[string]interface{})
	if err := c.ShouldBind(&msg); err != nil {
		c.JSON(200, gin.H{"message": "输入异常"})
		return nil, nil, false
	}
	return user, msg, true
}