package sys_config

import (
	"fmt"
	"math/rand"
	"time"

	"91porn-server/app/appg"
	"91porn-server/app/proto"
	"91porn-server/common"
	"91porn-server/common/constant/redisconst"
	"91porn-server/common/log"
	"91porn-server/models/v/sysconfmod"
	"91porn-server/models/v/usermod"

	"github.com/vmihailenco/msgpack/v5"
)

// mapUserPaymentStatusPopup 用户付费状态分层 → 需要拉取的配置项集合
var mapUserPaymentStatusPopup = map[string]map[sysconfmod.VCode]bool{
	usermod.UserPaymentStatusPopupNewUnpay: {
		sysconfmod.VCodeUserPaymentStatusPopupNewUserPopup:     true,
		sysconfmod.VCodeUserPaymentStatusPopupNewUserFloating:  true,
		sysconfmod.VCodeUserPaymentStatusPopupNewUserPlayPage:  true,
		sysconfmod.VCodeUserPaymentStatusPopupNewUserMeTab:     true,
		sysconfmod.VCodeUserPaymentStatusPopupNewUserVipCardID: true,
		sysconfmod.VCodeUserPaymentStatusPopupNewUserCountdown: true,
	},
	usermod.UserPaymentStatusPopupUnder7DayUnpay: {
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayPopup:     true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayFloating:  true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayPlayPage:  true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayMeTab:     true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayVipCardID: true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayCountdown: true,
	},
	usermod.UserPaymentStatusPopupUnder7DayUnpayNoCountdown: {
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayPopupNoCountdown:    true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayFloatingNoCountdown: true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayPlayPageNoCountdown: true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayMeTabNoCountdown:    true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayVipCardID:           true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayCountdown:           true,
	},
	usermod.UserPaymentStatusPopupOver7DayUnpay: {
		sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayPopup:     true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayFloating:  true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayPlayPage:  true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayMeTab:     true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayVipCardID: true,
		sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayCountdown: true,
	},
	usermod.UserPaymentStatusPopupOver7DayNeedUpgrade: {
		sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradePopup:     true,
		sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradeFloating:  true,
		sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradePlayPage:  true,
		sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradeMeTab:     true,
		sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradeVipCardID: true,
		sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradeCountdown: true,
	},
	usermod.UserPaymentStatusPopupMaxVIPLevel: {
		sysconfmod.VCodeUserPaymentStatusPopupMaxVIPLevel: true,
	},
}

// SysConfUserPaymentStatusPopup 根据用户付费状态分层，返回对应的分层弹窗配置与分层标识。
// 结果按分层做 1-3 分钟随机时长的 Redis 缓存。
func SysConfUserPaymentStatusPopup(user *usermod.User) (res proto.PaymentStatusPopupConfig, userType string, err error) {
	if user == nil {
		return
	}
	userType = user.GetPaymentStatusPopup()
	userCreateTime := user.CreatedAt
	vCodes, ok := mapUserPaymentStatusPopup[userType]
	if !ok {
		return
	}

	// 缓存键使用原始分层标识：有倒计时/无倒计时两个分层的配置项不同，必须分开缓存，
	// 否则会互相覆盖，导致下发错误的图片源。
	cacheKey := fmt.Sprintf("%s:%s", redisconst.UserPaymentStatusPopupCache, userType)

	// 读缓存
	str, err := appg.Redis.Get(cacheKey)
	if err != nil {
		log.Warn(fmt.Sprintf("获取用户分层弹窗缓存数据异常:%v", err))
	}
	if str != nil {
		if err = msgpack.Unmarshal([]byte(*str), &res); err == nil {
			// 缓存按分层(userType)共享、不含 uid，图片配置可共享；但 LastDiscountTime
			// 是 per-user 动态值(依赖当前用户注册时间)，必须基于当前用户重算，
			// 否则会串用到同分层其他用户的时刻。
			if !res.LastDiscountTime.IsZero() {
				res.LastDiscountTime = userCreateTime.AddDate(0, 0, countdownDaysOf(userType)).Local()
			}
			userType = normalizePaymentStatusPopupType(userType)
			return
		}
		log.Warn(fmt.Sprintf("解析用户分层弹窗缓存数据异常:%v", err))
	}

	vCodesKey := make([]sysconfmod.VCode, 0, len(vCodes))
	for vCode := range vCodes {
		vCodesKey = append(vCodesKey, vCode)
	}
	data, err := sysconfmod.BatchGetInfoByVCode(vCodesKey)
	if err != nil {
		log.Error("获取用户分层弹窗数据失败!", log.E(err))
		res = proto.PaymentStatusPopupConfig{} // 兜底：返回空配置
	} else { // 使用两层 else 是为了让兜底方案也能被缓存，避免故障时每次请求都访问数据库
		for _, d := range data {
			switch d.VCode {
			case string(sysconfmod.VCodeUserPaymentStatusPopupNewUserPopup),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayPopup),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayPopupNoCountdown),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayPopup),
				string(sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradePopup):
				res.Homepage = d.Value
			case string(sysconfmod.VCodeUserPaymentStatusPopupNewUserFloating),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayFloating),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayFloatingNoCountdown),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayFloating),
				string(sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradeFloating):
				res.HomepageFlot = d.Value
			case string(sysconfmod.VCodeUserPaymentStatusPopupNewUserPlayPage),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayPlayPage),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayPlayPageNoCountdown),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayPlayPage),
				string(sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradePlayPage):
				res.PlayPage = d.Value
			case string(sysconfmod.VCodeUserPaymentStatusPopupNewUserMeTab),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayMeTab),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayMeTabNoCountdown),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayMeTab),
				string(sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradeMeTab),
				string(sysconfmod.VCodeUserPaymentStatusPopupMaxVIPLevel):
				res.MeTab = d.Value
			case string(sysconfmod.VCodeUserPaymentStatusPopupNewUserVipCardID),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayVipCardID),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayOver7dayVipCardID),
				string(sysconfmod.VCodeUserPaymentStatusPopupPayNeedUpgradeVipCardID):
				res.VipCard = d.Value
			case string(sysconfmod.VCodeUserPaymentStatusPopupNewUserCountdown),
				string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayCountdown):
				if d.VCode == string(sysconfmod.VCodeUserPaymentStatusPopupNewUserCountdown) && d.Value == "1" {
					res.LastDiscountTime = userCreateTime.AddDate(0, 0, 1).Local()
				}
				if d.VCode == string(sysconfmod.VCodeUserPaymentStatusPopupUnpayUnder7dayCountdown) && d.Value == "1" {
					res.LastDiscountTime = userCreateTime.AddDate(0, 0, 2).Local()
				}
			}
		}
	}

	common.Go(func() {
		// 加入缓存，随机 60-180 秒，避免缓存集中失效
		random := rand.Intn(120) + 60
		b, mErr := msgpack.Marshal(res)
		if mErr != nil {
			return
		}
		if sErr := appg.Redis.Set(cacheKey, b, time.Duration(random)*time.Second); sErr != nil {
			log.Warn(fmt.Sprintf("设置用户分层弹窗缓存数据异常:%v", sErr))
		}
	})

	userType = normalizePaymentStatusPopupType(userType)
	return
}

// normalizePaymentStatusPopupType 统一对外的分层标识：无倒计时仅作内部区分，对外并入 under_7_day_unpay。
// 前端通过 LastDiscountTime 是否为零值来判断是否展示倒计时。
func normalizePaymentStatusPopupType(userType string) string {
	if userType == usermod.UserPaymentStatusPopupUnder7DayUnpayNoCountdown {
		return usermod.UserPaymentStatusPopupUnder7DayUnpay
	}
	return userType
}

// countdownDaysOf 返回该分层倒计时天数(用于命中缓存时按当前用户重算 LastDiscountTime)：
// 新用户 1 天，7天内未付款(含无倒计时变体) 2 天，其余分层无倒计时。
// 需与生成路径 AddDate 的天数保持一致。
func countdownDaysOf(userType string) int {
	switch userType {
	case usermod.UserPaymentStatusPopupNewUnpay:
		return 1
	case usermod.UserPaymentStatusPopupUnder7DayUnpay,
		usermod.UserPaymentStatusPopupUnder7DayUnpayNoCountdown:
		return 2
	}
	return 0
}