package controller

import (
	"fmt"
	"github.com/gin-gonic/gin"
	"net/http"
	"sort"
	"strconv"
	"time"
	"vote-video-api/api/dao"
	"vote-video-api/api/dto"
	"vote-video-api/api/model"
	"vote-video-api/api/requests"
	"vote-video-api/api/responses"
	"vote-video-api/api/service"
	"vote-video-api/consts"
	"vote-video-api/global"
	"vote-video-api/utils"
)

type Video struct{}

// GetVideoPage 获取视频列表-分页
func (r *Video) GetVideoPage(c *gin.Context) {
	videoRequest := requests.VideoRequest{}
	req := videoRequest.GetVideoPage
	if err := c.ShouldBind(&req); err != nil {
		responses.FailWithMessage(err.Error(), c)
		return
	}

	// 参数验证
	if err := global.Validate.Struct(req); err != nil {
		responses.FailWithMessage(utils.Translate(err), c)
		return
	}

	if req.Page == 0 {
		req.Page = 1
	}

	if req.PageSize == 0 {
		req.PageSize = 20
	}

	// 获取数据
	videoDao := dao.VideoDao{}
	videos, total, err := videoDao.GetVideoPageSearch(req, req.Page, req.PageSize)
	if err != nil {
		responses.FailWithMessage(err.Error(), c)
		return
	}

	// 处理返回值
	g := dto.GetVideoListDto(videos)

	// 检测用户今日是否投票
	userId := c.GetInt64("UserId")
	if userId != 0 {
		userService := service.UserService{}
		for _, videoDto := range g {
			videoId, err := strconv.ParseInt(videoDto.VideoId, 10, 64)
			if err != nil {
				continue
			}

			videoDto.IsVote = userService.CheckUserVoteDay(userId, videoId, 2)
		}
	}

	result := make(map[string]interface{})
	result["page"] = req.Page
	result["page_size"] = req.PageSize
	result["total"] = total
	result["data"] = g
	responses.OkWithData(result, c)
}

// GetVideo 获取视频详情
func (r *Video) GetVideo(c *gin.Context) {
	id := c.Param("video_id")
	if id == "" {
		responses.FailWithMessage("缺少参数", c)
		return
	}

	// 将 id 转换为 int64 类型
	videoId, err := strconv.ParseInt(id, 10, 64)
	if err != nil {
		responses.Fail(c)
		return
	}

	// 获取数据
	videoDao := dao.VideoDao{}
	video, err := videoDao.GetVideoById(videoId)
	if err != nil {
		responses.FailWithMessage("文章错误", c)
		return
	}

	// 获取视频作者
	videoAuthorDao := dao.VideoAuthorDao{}
	videoAuthors, err := videoAuthorDao.GetVideoAuthorListPreloadByVideoId(videoId)
	if err != nil {
		responses.FailWithMessage("文章错误", c)
		return
	}

	video.VideoAuthor = videoAuthors

	// 处理返回值
	g := dto.GetVideoDto(video)

	// 获取排名开关限制
	systemConfigDao := dao.SystemConfigDao{}
	systemConfig, err := systemConfigDao.GetSystemConfigById(1)
	if err != nil {
		responses.OkWithData(nil, c)
		return
	}

	if systemConfig.IsDisplayRank == 1 {
		// 获取大于某一投票数的文章
		maps := make(map[string]interface{})
		maps["video_status"] = 1
		videos, err := videoDao.GetVideoListGtVoteNum(maps, video.VoteNum)
		if err == nil {
			rank := len(videos) + 1

			// 加载数据-作者排名
			g.LoadRank(rank)
		}
	}

	// 加载数据-作者
	g.LoadVideoAuthor(video.VideoAuthor)

	// 检测用户今日是否投票
	userId := c.GetInt64("UserId")
	if userId != 0 {
		userService := service.UserService{}
		isVote := userService.CheckUserVoteDay(userId, videoId, 2)

		// 加载数据-投票状态
		g.LoadVoteStatus(isVote)
	}

	responses.OkWithData(g, c)
}

// GetVideoRankList 获取视频排名列表
func (r *Video) GetVideoRankList(c *gin.Context) {
	// 获取排名开关限制
	systemConfigDao := dao.SystemConfigDao{}
	systemConfig, err := systemConfigDao.GetSystemConfigById(1)
	if err != nil {
		responses.OkWithData(nil, c)
		return
	}

	if systemConfig.IsDisplayRank == 0 {
		responses.OkWithData(nil, c)
		return
	}

	// 获取数据
	videoDao := dao.VideoDao{}
	maps := make(map[string]interface{})
	maps["video_status"] = 1
	videos, err := videoDao.GetVideoRankList(maps, "vote_num desc", 15)
	if err != nil {
		responses.OkWithData(nil, c)
		return
	}

	var videoIds []int64

	for _, video := range videos {
		videoIds = append(videoIds, video.VideoId)
	}

	// 处理数据
	for i, video := range videos {
		videoIds = append(videoIds, video.VideoId)

		// 判断最后两位票数是否相同
		if i == 14 {
			maps = make(map[string]interface{})
			maps["video_status"] = 1
			maps["vote_num"] = video.VoteNum
			results, err := videoDao.GetVideoListNotIn(maps, videoIds)
			if err != nil {
				responses.OkWithData(nil, c)
				return
			}

			for _, result := range results {
				videos = append(videos, result)
			}
		}
	}

	// 处理返回值
	g := dto.GetVideoListDto(videos)

	// 检测用户今日是否投票
	userId := c.GetInt64("UserId")
	if userId != 0 {
		userService := service.UserService{}
		for _, videoDto := range g {
			videoId, err := strconv.ParseInt(videoDto.VideoId, 10, 64)
			if err != nil {
				continue
			}

			videoDto.IsVote = userService.CheckUserVoteDay(userId, videoId, 2)
		}
	}

	// 根据 VoteNum 降序排序
	sort.SliceStable(g, func(i, j int) bool {
		return g[i].VoteNum > g[j].VoteNum
	})

	// 计算排名
	var currentRank int
	for k, v := range g {
		if k == 0 {
			// 第一个元素，排名设为1
			currentRank = 1
		} else if g[k].VoteNum < g[k-1].VoteNum {
			currentRank = k + 1
		}

		// 为当前元素设置 Rank
		rank := currentRank // 创建一个新的变量来保存排名
		v.Rank = &rank      // 将新的变量的地址赋给 Rank
	}

	responses.OkWithData(g, c)
}

// AddVideoVote 视频投票
func (r *Video) AddVideoVote(c *gin.Context) {
	id := c.Param("video_id")
	if id == "" {
		responses.FailWithMessage("缺少参数", c)
		return
	}

	// 将 id 转换为 int64 类型
	videoId, err := strconv.ParseInt(id, 10, 64)
	if err != nil {
		responses.Fail(c)
		return
	}

	userId := c.GetInt64("UserId")
	if userId == 0 {
		c.JSON(http.StatusUnauthorized, gin.H{
			"message": "请登录后投票",
			"code":    consts.TokenError,
			"data":    "",
		})
		return
	}

	// 检测并发请求
	redisKey := "AddVideoVote" + fmt.Sprintf("%d", userId) + fmt.Sprintf("%d", videoId)
	res, _ := global.Redis.Get(c, redisKey).Result()
	if res != "" {
		responses.FailWithMessage("请勿重复操作", c)
		return
	}

	defer func(redisKey string) {
		global.Redis.Del(c, redisKey)
	}(redisKey)

	// 添加缓存
	_, err = global.Redis.Set(c, redisKey, "1", (1)*time.Second).Result()
	if err != nil {
		responses.FailWithMessage("投票失败", c)
		return
	}

	// 获取数据
	videoDao := dao.VideoDao{}
	video, err := videoDao.GetVideoById(videoId)
	if err != nil || video == nil {
		responses.FailWithMessage("非法数据", c)
		return
	}

	// 检测投票有效期
	systemTimeService := service.SystemTimeService{}
	isValid := systemTimeService.CheckVoteValidStatus()
	if isValid == false {
		responses.FailWithMessage("投票已结束", c)
		return
	}

	// 检测用户今日是否投票
	userService := service.UserService{}
	isVote := userService.CheckUserVoteDay(userId, videoId, 2)
	if isVote == true {
		responses.FailWithMessage("请勿重复投票", c)
		return
	}

	// 开始事务
	tx := global.Db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
			utils.LogJsonErr("投票失败", r)
			responses.FailWithMessage("投票失败", c)
			return
		}
	}()

	// 增加投票数
	err = videoDao.Inc(tx, videoId, "vote_num", 1)
	if err != nil {
		tx.Rollback()
		responses.FailWithMessage("投票失败", c)
		return
	}

	// 增加投票记录
	nowDay, _ := time.Parse("2006-01-02", time.Now().Format("2006-01-02"))
	votedAt := model.LocalTime(nowDay)
	videoVoteDay := &model.VideoVoteDay{
		VideoId: videoId,
		UserId:  userId,
		VotedAt: &votedAt,
	}

	videoVoteDayDao := dao.VideoVoteDayDao{}
	videoVoteDay, err = videoVoteDayDao.AddVideoVoteDay(tx, videoVoteDay)
	if err != nil {
		tx.Rollback()
		responses.FailWithMessage("投票失败", c)
		return
	}

	// 增加数据表-投票数量
	dataDao := dao.DataDao{}
	err = dataDao.Inc(tx, 1, "vote_num", 1)
	if err != nil {
		tx.Rollback()
		responses.FailWithMessage("投票失败", c)
		return
	}

	// 新增投票缓存
	result := userService.AddUserVoteDayCache(userId, videoId, 2)
	if result == false {
		tx.Rollback()
		responses.FailWithMessage("投票失败", c)
		return
	}

	tx.Commit()
	responses.Ok(c)
}