package configser

import (
	"strconv"
	"strings"
)

// AppConfigVM 注入全站页面的公共配置（字段名与接口 newAddressInfo / seoInfo 对齐）。
type AppConfigVM struct {
	ForeverURLAddr      string        `json:"foreverUrlAddr"`
	NewURLAddr          string        `json:"newUrlAddr"`
	NewURLAddr1         string        `json:"newUrlAddr1"`
	NewURLAddr2         string        `json:"newUrlAddr2"`
	GmailAddr           string        `json:"gmailAddr"`
	QQ                  string        `json:"qq"`
	TGGroup             string        `json:"tgGroup"`
	Telegram            string        `json:"telegram"`
	PotaoGroup          string        `json:"potaoGroup"`
	CustomerServiceHost string        `json:"customerServiceHost"`
	AppAddr             string        `json:"appAddr"`
	OfficialAppAddr     string        `json:"officialAppAddr"`
	PDFAddr             string        `json:"pdfAddr"`
	TwitterAddr         string        `json:"twitterAddr"`
	SeoInfo             SeoInfo       `json:"seoInfo,omitempty"`
	SeoNavInfo          SeoNavInfo    `json:"seoNavInfo,omitempty"`
	NavPageList         []NavPageItem `json:"navPageList,omitempty"`
	Advitise            AdvitiseData  `json:"advitise"`
	// 网页只用后台「站点」的 5 个广告位：
	// 弹窗 / 9宫格（弹窗广告后弹出）/ 详情横幅 / 播放页小图标 / 首页小图标
	DialogList       []Advertisement `json:"dialogList,omitempty"`
	NineGridList     []Advertisement `json:"nineGridList,omitempty"`
	DetailBannerList []Advertisement `json:"detailbannerList,omitempty"`
	AList            []Advertisement `json:"AList,omitempty"`
	BList            []Advertisement `json:"BList,omitempty"`
}

// BuildAppConfigVM 从上游配置组装前端可用字段。
func BuildAppConfigVM(info *ConfigInfoResp) AppConfigVM {
	if info == nil {
		return AppConfigVM{}
	}
	addr := info.NewAddressInfo
	return AppConfigVM{
		ForeverURLAddr:      sanitizeURL(addr.ForeverURLAddr),
		NewURLAddr:          sanitizeURL(addr.NewURLAddr),
		NewURLAddr1:         sanitizeURL(addr.NewURLAddr1),
		NewURLAddr2:         sanitizeURL(addr.NewURLAddr2),
		GmailAddr:           strings.TrimSpace(addr.GmailAddr),
		QQ:                  strings.TrimSpace(addr.QQ),
		TGGroup:             sanitizeURL(addr.TGGroup),
		Telegram:            sanitizeURL(addr.Telegram),
		PotaoGroup:          sanitizeURL(firstNonEmptyURL(info.Config.PotaoGroup, addr.PotaoGroup)),
		CustomerServiceHost: sanitizeURL(addr.CustomerServiceHost),
		AppAddr:             sanitizeURL(addr.AppAddr),
		OfficialAppAddr:     sanitizeURL(addr.OfficialAppAddr),
		PDFAddr:             sanitizeURL(addr.PDFAddr),
		TwitterAddr:         sanitizeURL(addr.TwitterAddr),
		NavPageList:         buildNavPageList(info.NavPageList),
		Advitise:            info.Advitise,
		DialogList:          buildAdvertisementList(info.Advitise.DialogList),
		NineGridList:        buildAdvertisementList(info.Advitise.NineGridList),
		// 本站后台用 videoTopList / appInfoAList / appInfoBList；兼容 detailbannerList / AList / BList 命名
		DetailBannerList: firstAdvertisementList(info.Advitise.VideoTopList, info.Advitise.DetailBannerList),
		AList:            firstAdvertisementList(info.Advitise.AppInfoAList, info.Advitise.AList),
		BList:            firstAdvertisementList(info.Advitise.AppInfoBList, info.Advitise.BList),
		SeoInfo: SeoInfo{
			Title:        strings.TrimSpace(info.SeoInfo.Title),
			Description:  strings.TrimSpace(info.SeoInfo.Description),
			Keywords:     info.SeoInfo.Keywords,
			CanonicalURL: strings.TrimSpace(info.SeoInfo.CanonicalURL),
			WebSiteName:  strings.TrimSpace(info.SeoInfo.WebSiteName),
		},
		SeoNavInfo: SeoNavInfo{
			DhTitle:       strings.TrimSpace(info.SeoNavInfo.DhTitle),
			DhDescription: strings.TrimSpace(info.SeoNavInfo.DhDescription),
			DhKeyworld:    info.SeoNavInfo.DhKeyworld,
			DhSiteName:    strings.TrimSpace(info.SeoNavInfo.DhSiteName),
		},
	}
}

func buildAdvertisementList(list []Advertisement) []Advertisement {
	if len(list) == 0 {
		return nil
	}
	out := make([]Advertisement, 0, len(list))
	for _, item := range list {
		item.ID = strings.TrimSpace(item.ID)
		item.Images = sanitizeURL(item.Images)
		item.Link = sanitizeURL(item.Link)
		item.Title = strings.TrimSpace(item.Title)
		if item.Images == "" {
			continue
		}
		out = append(out, item)
	}
	return out
}

// ClickID 广告点击上报用的数字 ID（上游下发为数字字符串）；非正整数时返回 0。
func (a Advertisement) ClickID() int64 {
	id, err := strconv.ParseInt(strings.TrimSpace(a.ID), 10, 64)
	if err != nil || id <= 0 {
		return 0
	}
	return id
}

// ClickTrackable 广告 ID 与广告位均有效时才输出点击上报数据（data-ads-id / data-ads-location）。
func (a Advertisement) ClickTrackable() bool {
	return a.ClickID() > 0 && a.Location > 0
}

// firstAdvertisementList 返回第一个有可用广告的列表（按字段优先级）。
func firstAdvertisementList(lists ...[]Advertisement) []Advertisement {
	for _, list := range lists {
		if built := buildAdvertisementList(list); len(built) > 0 {
			return built
		}
	}
	return nil
}

// QRText 下载弹窗二维码、跳转及复制链接内容：仅使用应用下载地址 appAddr。
func (c AppConfigVM) QRText() string {
	return strings.TrimSpace(c.AppAddr)
}

func buildNavPageList(list []NavPageItem) []NavPageItem {
	if len(list) == 0 {
		return nil
	}
	out := make([]NavPageItem, 0, len(list))
	for _, item := range list {
		u := sanitizeURL(item.URL)
		if u == "" {
			continue
		}
		out = append(out, NavPageItem{Line: item.Line, URL: u})
	}
	return out
}

func (n NavPageItem) Label() string {
	digits := []string{"", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十"}
	if n.Line >= 1 && n.Line <= 10 {
		return "线路" + digits[n.Line]
	}
	if n.Line > 0 {
		return "线路" + strconv.Itoa(n.Line)
	}
	return "线路"
}

func sanitizeURL(v string) string {
	v = strings.TrimSpace(v)
	v = strings.TrimRight(v, "\\")
	return strings.TrimSpace(v)
}

func firstNonEmptyURL(values ...string) string {
	for _, v := range values {
		if sanitizeURL(v) != "" {
			return v
		}
	}
	return ""
}