// Package h5path 统一拼装黄豆 H5（91dj-h5）的页面路径。
// 页面地址与线上 canonical 一致，不追加尾斜杠。
package h5path

import (
	"strconv"
	"strings"
	"videoweb/pub/common/utils"
)

func Segment(slug string, id int64) string {
	return utils.PathSegment(slug, id)
}

// Entity 拼 /{prefix}/{slug|id}，无有效段时只返回 prefix。
func Entity(prefix, slug string, id int64) string {
	prefix = "/" + strings.Trim(prefix, "/")
	if segment := Segment(slug, id); segment != "" {
		return prefix + "/" + segment
	}
	return prefix
}

func Playlet(slug string, id int64) string {
	if Segment(slug, id) == "" {
		return ""
	}
	return Entity("/short-drama", slug, id)
}

// PlayletPlay 播放页：/short-drama/{slug}/play/{集数}。集数是 CurrentEpisode，不是剧集文档 id。
func PlayletPlay(slug string, id, episode int64) string {
	base := Playlet(slug, id)
	if base == "" || episode <= 0 {
		return ""
	}
	return base + "/play/" + strconv.FormatInt(episode, 10)
}

func PlayletChapter(slug string, playletID, episode int64) string {
	return PlayletPlay(slug, playletID, episode)
}

func TopicDetail(slug string, id int64) string {
	if isReservedTopicSlug(slug) {
		slug = ""
	}
	if Segment(slug, id) == "" {
		return "/topics"
	}
	return Entity("/topics", slug, id)
}

func Tag(slug string, id int64) string {
	if Segment(slug, id) == "" {
		return ""
	}
	return Entity("/topics/tag", slug, id)
}

func ListTheme(slug string, id int64) string {
	return TopicDetail(slug, id)
}

func isReservedTopicSlug(slug string) bool {
	switch strings.ToLower(strings.TrimSpace(slug)) {
	case "tag", "page":
		return true
	default:
		return false
	}
}

func VideoPlay(slug string, id int64) string {
	if Segment(slug, id) == "" {
		return ""
	}
	return Entity("/series-play", slug, id)
}

func MoreList(slug string, id int64) string {
	if Segment(slug, id) == "" {
		return ""
	}
	return Entity("/shorts/more", slug, id)
}

func MoreSeriesList(slug string, id int64) string {
	if Segment(slug, id) == "" {
		return ""
	}
	return Entity("/more-series-list", slug, id)
}

func SeriesTopic(topicID int64) string {
	if topicID <= 0 {
		return "/series"
	}
	return "/series/all/" + strconv.FormatInt(topicID, 10) + "/1"
}

// Abs 拼绝对地址。首页保留尾斜杠，其余页面与 H5 路由一致、不带尾斜杠。
func Abs(webAddr, path string) string {
	path = strings.TrimSpace(path)
	if path == "" || path == "/" {
		return utils.JoinUrlPathKeepSlash(webAddr, "/")
	}
	return utils.JoinUrlPathKeepSlash(webAddr, "/"+strings.Trim(path, "/"))
}

// SitemapAbs 拼 sitemap 绝对地址，与 H5 canonical 一致，不追加尾斜杠。
func SitemapAbs(webAddr, path string) string {
	webAddr = strings.TrimRight(strings.TrimSpace(webAddr), "/")
	path = strings.TrimSpace(path)
	if webAddr == "" {
		return ""
	}
	if path == "" || path == "/" {
		return webAddr
	}
	return webAddr + "/" + strings.Trim(path, "/")
}