package web

import (
	"net/http"
	"strconv"
	"strings"
	"videoweb/app/service/playletser"

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

// Rank 排行榜页 SSR：GET /api/app/playlet/rank，列表用接口字段渲染。
func Rank(c *gin.Context) {
	sortOrder := strings.TrimSpace(c.Param("sortOrder"))
	if sortOrder != "" {
		value, err := strconv.Atoi(sortOrder)
		if err != nil || value < 1 || value > 3 {
			NotFound(c, "页面不存在")
			return
		}
	}
	if sortOrder == "" {
		sortOrder = strings.TrimSpace(c.Query("sortOrder"))
	}
	page := strings.TrimSpace(c.Param("page"))
	if page != "" {
		value, err := strconv.Atoi(page)
		if err != nil || value <= 0 {
			NotFound(c, "页面不存在")
			return
		}
	}
	if page == "" {
		page = strings.TrimSpace(c.Query("page"))
	}
	q := playletser.ParseRankQuery(page, sortOrder)
	if c.Query("sortOrder") != "" || c.Query("page") != "" {
		target := "/rank"
		if q.SortOrder != 1 {
			target += "/" + strconv.Itoa(q.SortOrder)
		}
		if q.PageNum > 1 {
			target += "/page/" + strconv.Itoa(q.PageNum)
		}
		target += "/"
		c.Redirect(http.StatusMovedPermanently, target)
		return
	}
	if redirectCanonical(c, playletser.RankCanonicalPath(q)) {
		return
	}
	raw := playletser.FetchRankOrEmpty(c, q)
	if playletser.PageOutOfRange(q.PageNum, q.PageSize, raw.TotalCount) {
		NotFound(c, "页面不存在")
		return
	}
	tabs := playletser.BuildRankTabs(q)
	seoSelections := make([]playletser.SEOSelection, 0, 1)
	for _, tab := range tabs {
		if tab.Active {
			seoSelections = append(seoSelections, playletser.SEOSelection{Dimension: "排行榜类型", Value: tab.Label})
			break
		}
	}
	data := gin.H{
		"title":         "排行榜",
		"description":   "黄果短剧排行榜实时更新热播短剧，查看热门榜、飙升榜，不错过高口碑必看剧集。",
		"navActive":     "rank",
		"seoInfo":       raw.SeoInfo,
		"seoSelections": seoSelections,
		"tabs":          tabs,
		"list":          raw.List,
		"rankOffset":    playletser.RankOffset(q),
		"sortOrder":     q.SortOrder,
		"isBinge":       playletser.IsRankBinge(q.SortOrder),
		"pagination":    playletser.BuildRankPagination(q, raw.TotalCount),
	}
	if raw.TotalCount <= 0 || len(raw.List) == 0 {
		setNoIndex(data, true)
	}
	HTMLOK(c, "rank.html", data)
}