package app

import (
	"encoding/json"
	"net/http"
	"sort"
	"strconv"

	"bindbox-game/internal/code"
	"bindbox-game/internal/pkg/core"
	"bindbox-game/internal/pkg/validation"
)

type rewardItem struct {
	ID           int64  `json:"id"`
	ProductID    int64  `json:"product_id"`
	Name         string `json:"name"`
	Weight       int32  `json:"weight"`
	Quantity     int64  `json:"quantity"`
	OriginalQty  int64  `json:"original_qty"`
	Level        int32  `json:"level"`
	PrizeLevel   int32  `json:"prize_level"` // 兼容部分前端逻辑
	Sort         int32  `json:"sort"`
	IsBoss       int32  `json:"is_boss"`
	ProductImage string `json:"product_image"`
	MinScore     int64  `json:"min_score"`
}

type listRewardsResponse struct {
	List     []rewardItem `json:"list"`
	PlayType string       `json:"play_type"` // 活动类型
}

// ListIssueRewards 奖励配置列表
// @Summary 奖励配置列表
// @Description 获取指定期的奖励配置列表
// @Tags APP端.活动
// @Accept json
// @Produce json
// @Param activity_id path integer true "活动ID"
// @Param issue_id path integer true "期ID"
// @Success 200 {object} listRewardsResponse
// @Failure 400 {object} code.Failure
// @Router /api/app/activities/{activity_id}/issues/{issue_id}/rewards [get]
func (h *handler) ListIssueRewards() core.HandlerFunc {
	return func(ctx core.Context) {
		issueIDStr := ctx.Param("issue_id")
		if issueIDStr == "" {
			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "未传递期ID"))
			return
		}
		if _, err := strconv.ParseInt(issueIDStr, 10, 64); err != nil {
			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, validation.Error(err)))
			return
		}
		issueID, _ := strconv.ParseInt(issueIDStr, 10, 64)

		items, err := h.activity.ListIssueRewards(ctx.RequestContext(), issueID)
		if err != nil {
			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ListIssueRewardsError, err.Error()))
			return
		}

		// 获取活动信息以判断 PlayType，决定排序方式
		activityIDStr := ctx.Param("activity_id")
		aid, _ := strconv.ParseInt(activityIDStr, 10, 64)
		act, _ := h.activity.GetActivity(ctx.RequestContext(), aid)

		// 排序逻辑差异化
		if act != nil && (act.PlayType == "matching" || act.PlayType == "matching_game") {
			// 对对碰：按 MinScore 降序，其次按 Sort 升序
			sort.Slice(items, func(i, j int) bool {
				if items[i].MinScore != items[j].MinScore {
					return items[i].MinScore > items[j].MinScore
				}
				return items[i].Sort < items[j].Sort
			})
		} else {
			// 通用逻辑：已经在 Service 层处理过初步排序 (IsBoss DESC, Level ASC, Sort ASC)
			// 这里如果需要显式再次确认也可以，但目前保持现状
		}

		pidSet := make(map[int64]struct{})
		for _, v := range items {
			if v.ProductID > 0 {
				pidSet[v.ProductID] = struct{}{}
			}
		}
		imageMap := make(map[int64]string)
		nameMap := make(map[int64]string)
		if len(pidSet) > 0 {
			ids := make([]int64, 0, len(pidSet))
			for id := range pidSet {
				ids = append(ids, id)
			}
			pros, err := h.readDB.Products.WithContext(ctx.RequestContext()).ReadDB().Where(h.readDB.Products.ID.In(ids...)).Find()
			if err == nil {
				for _, p := range pros {
					first := ""
					if p.ImagesJSON != "" {
						var arr []string
						_ = json.Unmarshal([]byte(p.ImagesJSON), &arr)
						if len(arr) > 0 {
							first = arr[0]
						}
					}
					imageMap[p.ID] = first
					nameMap[p.ID] = p.Name
				}
			}
		}
		res := new(listRewardsResponse)
		if act != nil {
			res.PlayType = act.PlayType
		}
		res.List = make([]rewardItem, len(items))
		for i, v := range items {
			// 直接使用商品名称
			nameVal := nameMap[v.ProductID]
			res.List[i] = rewardItem{
				ID:           v.ID,
				ProductID:    v.ProductID,
				Name:         nameVal,
				Weight:       v.Weight,
				Quantity:     v.Quantity,
				OriginalQty:  v.OriginalQty,
				Level:        v.Level,
				PrizeLevel:   v.Level,
				Sort:         v.Sort,
				IsBoss:       v.IsBoss,
				ProductImage: imageMap[v.ProductID],
				MinScore:     v.MinScore,
			}
		}
		ctx.Payload(res)
	}
}