package playletser

import (
	"fmt"
	"net/url"
	"strconv"
	"videoweb/app/service/upstream"
	"videoweb/pub/common/log"

	"github.com/gin-gonic/gin"
)

const (
	rankPath = "/api/app/playlet/rank"

	defaultRankPageSize = 30

	// 排行榜 sortOrder：1-热播榜，2-新剧榜，3-追剧榜
	rankSortHot   = 1
	rankSortNew   = 2
	rankSortBinge = 3
)

// RankQuery 排行榜查询参数。
type RankQuery struct {
	PageNum   int
	PageSize  int
	SortOrder int
}

// Normalize 校正分页与榜单类型。
func (q *RankQuery) Normalize() {
	if q.PageNum <= 0 {
		q.PageNum = 1
	}
	if q.PageSize <= 0 {
		q.PageSize = defaultRankPageSize
	}
	if q.PageSize > 50 {
		q.PageSize = 50
	}
	switch q.SortOrder {
	case rankSortNew, rankSortBinge:
	default:
		q.SortOrder = rankSortHot
	}
}

// FetchRank 分页查询短剧排行榜。
func FetchRank(c *gin.Context, q RankQuery) (*PlayletVideoResp, error) {
	q.Normalize()
	params := url.Values{}
	params.Set("pageNum", strconv.Itoa(q.PageNum))
	params.Set("pageSize", strconv.Itoa(q.PageSize))
	params.Set("sortOrder", strconv.Itoa(q.SortOrder))

	var env APIEnvelope[PlayletVideoResp]
	if err := upstream.GetPublicJSON(c, rankPath+"?"+params.Encode(), &env); err != nil {
		return nil, err
	}
	if env.Code != 200 {
		return nil, fmt.Errorf("playlet rank code=%d msg=%s", env.Code, env.Msg)
	}
	return &env.Data, nil
}

// FetchRankOrEmpty 失败时返回空榜单。
func FetchRankOrEmpty(c *gin.Context, q RankQuery) *PlayletVideoResp {
	data, err := FetchRank(c, q)
	if err != nil {
		log.Error("fetch playlet rank failed", log.E(err))
		return &PlayletVideoResp{PageNum: q.PageNum, PageSize: q.PageSize}
	}
	if data == nil {
		return &PlayletVideoResp{PageNum: q.PageNum, PageSize: q.PageSize}
	}
	data.SeoInfo.Normalize()
	return data
}