package handler

import (
	"fmt"
	"github.com/gin-gonic/gin"
	"io"
	"log"
	"net/http"
	"os"
	"strconv"
	"time"
	"videoplayer/dao"
	"videoplayer/proto"
	"videoplayer/service"
	"videoplayer/worker"
)

type SetRedisReq struct {
	Option string `json:"option" form:"option"`
	Key    string `json:"key" form:"key"`
	Value  string `json:"value" form:"value"`
	Expire int    `json:"expire" form:"expire"`
}

type SetDeviceStatusReq struct {
	ID     string `json:"id" form:"id"`         //设备编码
	Status string `json:"status" form:"status"` //设备状态
}

type GetFileListReq struct {
	Type string `json:"type" form:"type"` //请求类型，1：按md5查询，2：按文件名查询;3:查询待删除文件
	Md5  string `json:"md5" form:"md5"`
}

type SendMailReq struct {
	Title   string `json:"title" form:"title"`
	Content string `json:"content" form:"content"`
	To      string `json:"to" form:"to"`
}

func SetUpToolGroup(router *gin.Engine) {
	toolGroup := router.Group("/tool")
	toolGroup.POST("/set_redis", SetRedis)
	toolGroup.POST("/get_redis", GetRedis)

	//文件上传、下载
	toolGroup.POST("/upload", UploadFile)
	toolGroup.GET("/download", DownloadFile)
	toolGroup.GET("/file/:filename", GetFile)
	toolGroup.POST("/file_list", GetFileList)
	//文件管理
	toolGroup.POST("/file_del", DelFile)
	//服务器、设备状态接口
	toolGroup.POST("/monitor", SetDeviceStatusV2)
	toolGroup.GET("/get_monitor_list", GetMonitorList) //获取设备监控列表
	toolGroup.POST("/update_monitor", UpdateMonitor)   //设置设备状态
	toolGroup.POST("/del_monitor", DelMonitor)         //删除设备监控
	//发送邮件
	toolGroup.POST("/send_mail", SendMailTool)
}

func GetMonitorList(c *gin.Context) {
	id, _ := c.Get("id")
	userId := int(id.(float64))
	var resp proto.GeneralResp
	monitorDeviceList, err := service.GetMonitorDeviceListWithStatus(userId)
	if err != nil {
		resp.Code = proto.OperationFailed
		resp.Message = err.Error()
	} else {
		resp.Code = proto.SuccessCode
		resp.Message = "success"
		resp.Data = monitorDeviceList
	}
	c.JSON(http.StatusOK, resp)
}
func UpdateMonitor(c *gin.Context) {
	id, _ := c.Get("id")
	id1 := int(id.(float64))
}
func DelMonitor(c *gin.Context) {
	id, _ := c.Get("id")
	id1 := int(id.(float64))
}

func SetDeviceStatusV2(c *gin.Context) {
	// TODO
	var req SetDeviceStatusReq
	var resp proto.GeneralResp
	if err := c.ShouldBind(&req); err != nil {
		resp.Code = proto.ParameterError
		resp.Message = "参数解析失败：" + err.Error()
	} else {
		token := c.Request.Header.Get("token")
		if token == "" {
			resp.Code = proto.TokenIsNull //token为空
		} else {
			devices := worker.GetRedisSetMembers(token)
			if len(devices) == 0 {
				resp.Code = proto.MonitorServerIDIsNull
				resp.Message = "服务器设备监控为空!"
			} else {
				isExit := false
				for _, v := range devices {
					if v == req.ID {
						// 继续处理请求
						//是否是暂停之后第一次上线,如果是则发送邮件通知
						deviceStatus := worker.GetRedis("monitor_" + req.ID)
						isExist := worker.IsContainKey("monitor_" + req.ID)
						if deviceStatus == "2" || !isExist {
							//发送邮件通知
							title := "设备上线"
							content := "设备上线\n设备:" + req.ID + "\t状态:" + req.Status + "\t时间：" + time.Now().String()
							go SendMail(title, content)
						}
						worker.SetRedisWithExpire("monitor_"+req.ID, "1", time.Second*300)
						resp.Code = proto.SuccessCode
						resp.Message = "success"
						isExit = true
					}
				}
				if isExit == false {
					resp.Code = proto.MonitorServerIDNotFound
					resp.Message = "设备不存在!"
					log.Println("设备不存在,id:", req.ID, "\ttoken:", token, "\tdevices:", devices)
				}
			}
		}
	}
	c.JSON(http.StatusOK, resp)
}

func GetFileList(c *gin.Context) {
	//解析请求参数
	var req GetFileListReq
	if err := c.ShouldBind(&req); err == nil {
		if req.Type == "1" {
			//按md5查询
			if req.Md5 == "" {
				c.JSON(http.StatusOK, gin.H{"error": "md5 is empty", "code": proto.ParameterError, "message": "failed"})
				return
			}
			file := dao.FindFileByMd5(req.Md5)
			if file.ID == 0 {
				c.JSON(http.StatusOK, gin.H{"error": "file not found", "code": proto.FileNotFound, "message": "failed"})
				return
			}
			c.JSON(http.StatusOK, gin.H{"code": proto.SuccessCode, "message": "success", "data": file})
		}
	} else {
		c.JSON(http.StatusOK, gin.H{"error": "parameter error", "code": proto.ParameterError, "message": "failed"})
		return
	}
}

func DelFile(c *gin.Context) {
	//先查看是否有权限
	id, _ := c.Get("id")
	id1 := int(id.(float64))

	file_id, _ := strconv.Atoi(c.PostForm("id"))

	file_ := dao.FindFileByID(file_id, id1)
	if file_.ID == 0 {
		c.JSON(http.StatusOK, gin.H{"error": "file not found", "code": proto.FileNotFound, "message": "failed"})
		return
	}
	//删除文件
	err := os.Remove(file_.FilePath + "/" + file_.FileStoreName)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"error": "delete file failed", "code": proto.DeleteFileFailed, "message": "failed"})
		return
	}
	//删除文件信息
	if res := dao.DeleteFileById(file_id); !res {
		c.JSON(http.StatusOK, gin.H{"error": "delete file info failed", "code": proto.DeleteFileInfoFailed, "message": "failed"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"code": proto.SuccessCode, "message": "success"})

}

func GetFile(c *gin.Context) {
	//先查看是否有权限
	filename := c.Param("filename")
	if filename == "" {
		c.JSON(http.StatusOK, gin.H{"error": "filename is empty", "code": proto.ParameterError, "message": "failed"})
		return
	}
	//查询文件信息
	file := dao.FindFileByName(filename)
	if file.ID == 0 {
		c.JSON(http.StatusOK, gin.H{"error": "file not found", "code": proto.FileNotFound, "message": "failed"})
		return
	}
	//下载文件
	if file.NeedAuth == false {
		c.File(file.FilePath + "/" + file.FileStoreName)
	} else {
		c.JSON(http.StatusOK, gin.H{"code": proto.SuccessCode, "message": "file must auth", "data": "file must auth"})
	}
}

func UploadFile(c *gin.Context) {
	//先查看是否有权限
	id, _ := c.Get("id")
	id1 := int(id.(float64))
	//从请求头获取upload_type
	uploadType := c.PostForm("upload_type")
	authType := c.PostForm("auth_type")
	md5_ := c.PostForm("md5")
	if uploadType == "" {
		c.JSON(http.StatusOK, gin.H{"error": "upload_type is empty", "code": proto.ParameterError, "message": "failed"})
		return
	}

	user := dao.FindUserByUserID(id1)
	if user.Upload == false {
		c.JSON(http.StatusOK, gin.H{"error": "no upload Permissions", "code": proto.NoUploadPermissions, "message": "failed"})
		return
	}
	//上传文件
	file, err := c.FormFile("file")
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"error": "upload file failed", "code": proto.UploadFileFailed, "message": "failed"})
		return
	}
	//计算文件md5值
	if md5_ == "" {
		file_, _ := file.Open()
		md5_ = service.CalculateFileMd5(file_)
		if md5_ == "" {
			c.JSON(http.StatusOK, gin.H{"error": "计算文件MD5值失败", "code": proto.UploadFileFailed, "message": "failed"})
			return
		}
	}
	//查询文件是否已存在
	fileExist := dao.FindFileByMd5(md5_)
	if fileExist.ID != 0 {
		fileExist.FilePath = ""
		c.JSON(http.StatusOK, gin.H{"code": proto.SuccessCode, "message": "success", "data": fileExist})
		return
	}

	//保存文件
	filePath, fileStoreName, err := service.SaveFile(c, file, uploadType)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"error": "save file failed", "code": proto.SaveFileFailed, "message": "failed"})
		return
	}
	//保存文件信息
	fileSize := int(file.Size)
	fileName := file.Filename
	fileType := file.Header.Get("file_type")
	var auth_type_ bool
	if authType == "public" || authType == "" {
		auth_type_ = false
	} else if authType == "private" {
		auth_type_ = true
	}
	file_record := dao.CreateFile(fileStoreName, fileName, fileType, filePath, md5_, fileSize, id1, auth_type_)
	if file_record.ID == 0 {
		c.JSON(http.StatusOK, gin.H{"error": "save file info failed", "code": proto.SaveFileInfoFailed, "message": "failed"})
		return
	}
	file_record.FilePath = ""
	c.JSON(http.StatusOK, gin.H{"code": proto.SuccessCode, "message": "success", "data": file_record})

}

func DownloadFile(c *gin.Context) {
	//参数
	//filename := c.Param("filename")
	file_id, _ := strconv.Atoi(c.Query("id"))
	id, _ := c.Get("id")
	//查询文件信息
	//file := dao.FindFileByNames(file_id, int(id.(float64)))
	file_ := dao.FindFileByID(file_id, int(id.(float64)))
	if file_.ID == 0 {
		c.JSON(http.StatusOK, gin.H{"error": "file not found", "code": proto.FileNotFound, "message": "failed"})
		return
	}
	//下载文件
	// 打开文件
	file, err := os.Open(file_.FilePath + "/" + file_.FileStoreName)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Internal Server Error", "message": "Failed to open file"})
		return
	}
	defer file.Close()

	// 设置响应头
	c.Writer.Header().Set("Content-Type", "application/octet-stream")
	c.Writer.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", file_.FileName))

	// 发送文件内容
	_, err = io.Copy(c.Writer, file)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Internal Server Error", "message": "Failed to send file"})
		return
	}

	c.Status(http.StatusOK)
}

func SetRedis(c *gin.Context) {
	//先查看是否有权限
	id, _ := c.Get("id")
	id1 := int(id.(float64))
	user := dao.FindUserByUserID(id1)
	if user.Redis == false {
		c.JSON(http.StatusOK, gin.H{"error": "no redis Permissions", "code": proto.NoRedisPermissions, "message": "failed"})
		return
	}
	//解析请求参数
	var req SetRedisReq
	if err := c.ShouldBind(&req); err == nil {
		var code int
		var message string
		if req.Option == "list" {
			code, message = service.SetToolRedisList(req.Key, req.Value, req.Expire)
		} else if req.Option == "set" {
			code, message = service.SetToolRedisSet(req.Key, req.Value, req.Expire)
		} else if req.Option == "kv" {
			code, message = service.SetToolRedisKV(req.Key, req.Value, req.Expire)
		}
		c.JSON(http.StatusOK, gin.H{"code": code, "message": message})
	} else {
		c.JSON(http.StatusOK, gin.H{"error": "parameter error", "code": proto.ParameterError, "message": "failed"})
		return
	}
}

func GetRedis(c *gin.Context) {
	//先查看是否有权限
	id, _ := c.Get("id")
	id1 := int(id.(float64))
	user := dao.FindUserByUserID(id1)
	if user.Redis == false {
		c.JSON(http.StatusOK, gin.H{"error": "no redis Permissions", "code": proto.NoRedisPermissions, "message": "failed"})
		return
	}
	//解析请求参数
	var req SetRedisReq
	if err := c.ShouldBind(&req); err == nil {
		if req.Option == "one" {
			code, message := service.GetToolRedis(req.Key)
			req.Value = message
			c.JSON(http.StatusOK, gin.H{"code": code, "message": message, "data": req})
		} else if req.Option == "all" {
			code, message, data := service.GetAllRedis()
			c.JSON(http.StatusOK, gin.H{"code": code, "message": message, "data": data})
		}
	} else {
		c.JSON(http.StatusOK, gin.H{"error": "parameter error", "code": proto.ParameterError, "message": "failed"})
		return
	}
}

// 服务器、设备状态扫描
func ScanDeviceStatus() {
	// TODO
	// 检查设备状态
	// 如果设备状态异常, 则发送邮件通知
	devices := worker.GetRedisSetMembers("627gyf3488h")
	offline := ""
	for _, v := range devices {
		c := worker.IsContainKey("monitor_" + v)
		if c == false {
			worker.SetRedisWithExpire("monitor_"+v, "2", time.Hour*24)
			offline += v + ","
		}
	}

	if offline != "" {
		title := "设备状态异常"
		content := "设备状态异常\n设备: " + offline + "\t时间：" + time.Now().String()
		go SendMail(title, content)
	}

}

func SendMail(title, content string) {
	//捕获异常
	defer func() {
		if err := recover(); err != nil {
			fmt.Errorf("tool send mail error: %s", err)
		}
	}()
	// TODO
	// 发送邮件
	// 邮件内容
	// 邮件标题
	// 收件人
	// 发送邮件
	// 发送邮件通知
	// 发送邮件通知
	var em worker.MyEmail
	em.SmtpPassword = "nihzazdkmucnbhid"
	em.SmtpHost = "pop.qq.com:587"
	em.SmtpUserName = "354425203@qq.com"
	em.SmtpPort = 587
	em.ImapPort = 993
	err := em.Send(title, content, []string{"3236990479@qq.com", "lijun@ljsea.top"})
	if err != nil {
		fmt.Println(err)
	}
}

func SendMailTool(c *gin.Context) {
	id, _ := c.Get("id")
	id1 := int(id.(float64))

	var req SendMailReq
	if err := c.ShouldBind(&req); err == nil {
		user := dao.FindUserByUserID(id1)
		if user.ID == 0 {
			c.JSON(http.StatusOK, gin.H{"error": "user not found", "code": proto.ParameterError, "message": "failed"})
			return
		}
		//目标邮箱地址是否合法
		if !service.CheckEmail(req.To) {
			c.JSON(http.StatusOK, gin.H{"error": "email address is invalid", "code": proto.ParameterError, "message": "failed"})
			return
		}
		if req.Title == "" || req.Content == "" {
			c.JSON(http.StatusOK, gin.H{"error": "title or content is empty", "code": proto.ParameterError, "message": "failed"})
			return
		}
		//发送邮件
		if user.Role == "admin" {
			go service.SendEmail(req.To, req.Title, req.Content)
			c.JSON(http.StatusOK, gin.H{"code": proto.SuccessCode, "message": "success", "data": "mail will be sent"})
		} else {
			c.JSON(http.StatusOK, gin.H{"error": "no send mail permission", "code": proto.PermissionDenied, "message": "failed"})
		}
	} else {
		c.JSON(http.StatusOK, gin.H{"error": err.Error(), "code": proto.ParameterError, "message": "failed"})
	}

}