package configser

import (
	"fmt"
	"html/template"
	"net/url"
	"strings"
	"videoweb/app/service/upstream"
	"videoweb/pub/common/log"

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

const richtextListPath = "/api/app/config/richtext/list"

// RichTextPageVM 富文本页模板数据。
type RichTextPageVM struct {
	Title       string
	Subtitle    string
	ContentHTML template.HTML
	Found       bool
}

// FetchRichTextList 查询富文本列表（ids / titles 逗号分隔）。
func FetchRichTextList(c *gin.Context, ids, titles string) ([]AppRichTextItemResp, error) {
	params := url.Values{}
	if s := strings.TrimSpace(ids); s != "" {
		params.Set("ids", s)
	}
	if s := strings.TrimSpace(titles); s != "" {
		params.Set("titles", s)
	}
	path := richtextListPath
	if q := params.Encode(); q != "" {
		path += "?" + q
	}

	var env APIEnvelope[AppRichTextListResp]
	if err := upstream.GetPublicJSON(c, path, &env); err != nil {
		return nil, err
	}
	if env.Code != 200 {
		return nil, fmt.Errorf("richtext list code=%d msg=%s", env.Code, env.Msg)
	}
	return env.Data.List, nil
}

// FetchRichTextByTitle 按标题取第一条启用内容；失败返回空页 VM。
func FetchRichTextByTitle(c *gin.Context, title string) RichTextPageVM {
	title = strings.TrimSpace(title)
	vm := RichTextPageVM{Title: title}
	if title == "" {
		return vm
	}

	list, err := FetchRichTextList(c, "", title)
	if err != nil {
		log.Error("fetch richtext by title failed", log.E(err), log.Any("title", title))
		return vm
	}

	item := matchRichTextByTitle(list, title)
	if item == nil {
		return vm
	}

	displayTitle := strings.TrimSpace(item.Desc)
	if displayTitle == "" {
		displayTitle = strings.TrimSpace(item.Title)
	}
	if displayTitle == "" {
		displayTitle = title
	}

	vm.Found = true
	vm.Title = displayTitle
	vm.Subtitle = strings.TrimSpace(item.Desc)
	if vm.Subtitle == displayTitle {
		vm.Subtitle = ""
	}
	vm.ContentHTML = template.HTML(item.Content)
	return vm
}

func matchRichTextByTitle(list []AppRichTextItemResp, title string) *AppRichTextItemResp {
	if len(list) == 0 {
		return nil
	}
	for i := range list {
		if strings.TrimSpace(list[i].Title) == title || strings.TrimSpace(list[i].Desc) == title {
			return &list[i]
		}
	}
	return &list[0]
}

// RichTextHref 页脚导航跳转一律进入富文本页。
func RichTextHref(title string) string {
	title = strings.TrimSpace(title)
	if title == "" {
		return "/richtext/"
	}
	return "/richtext/" + title + "/"
}