package service

import (
	"errors"
	"fmt"

	"github.com/flipped-aurora/gin-vue-admin/server/global"
	"github.com/silenceper/wechat/v2/officialaccount"
	"github.com/silenceper/wechat/v2/officialaccount/draft"
)

type MpDraftService struct{}

// DraftListResponse 草稿列表响应结构
type DraftListResponse struct {
	Items      []DraftItem `json:"items"`
	TotalCount int         `json:"totalCount"`
}

// DraftItem 草稿项目结构
type DraftItem struct {
	MediaID    string       `json:"mediaId"`
	Content    DraftContent `json:"content"`
	UpdateTime int64        `json:"updateTime"`
}

// DraftContent 草稿内容结构
type DraftContent struct {
	NewsItem []DraftArticle `json:"newsItem"`
}

// DraftArticle 草稿文章结构
type DraftArticle struct {
	Title              string `json:"title"`
	Author             string `json:"author"`
	Digest             string `json:"digest"`
	Content            string `json:"content"`
	ContentSourceURL   string `json:"contentSourceUrl"`
	ThumbMediaID       string `json:"thumbMediaId"`
	ShowCoverPic       int    `json:"showCoverPic"`
	NeedOpenComment    int    `json:"needOpenComment"`
	OnlyFansCanComment int    `json:"onlyFansCanComment"`
	ThumbURL           string `json:"thumbUrl,omitempty"`
}

// GetDraftList 获取草稿列表
func (m *MpDraftService) GetDraftList(page, pageSize int, title, author string) (*DraftListResponse, error) {
	// 获取微信公众号实例
	oa, err := m.getOfficialAccount()
	if err != nil {
		return nil, err
	}

	// 计算偏移量
	offset := int64((page - 1) * pageSize)
	count := int64(pageSize)

	// 调用微信API获取草稿列表
	draftService := oa.GetDraft()
	articleList, err := draftService.PaginateDraft(offset, count, false)
	if err != nil {
		global.GVA_LOG.Error("获取微信草稿列表失败: " + err.Error())
		return nil, fmt.Errorf("获取草稿列表失败: %v", err)
	}

	// 转换数据格式
	response := &DraftListResponse{
		Items:      make([]DraftItem, 0, len(articleList.Item)),
		TotalCount: int(articleList.TotalCount),
	}

	for _, item := range articleList.Item {
		draftItem := DraftItem{
			MediaID:    item.MediaID,
			UpdateTime: item.UpdateTime,
			Content: DraftContent{
				NewsItem: make([]DraftArticle, 0, len(item.Content.NewsItem)),
			},
		}

		// 转换文章列表
		for _, article := range item.Content.NewsItem {
			draftArticle := DraftArticle{
				Title:              article.Title,
				Author:             article.Author,
				Digest:             article.Digest,
				Content:            article.Content,
				ContentSourceURL:   article.ContentSourceURL,
				ThumbMediaID:       article.ThumbMediaID,
				ShowCoverPic:       int(article.ShowCoverPic),
				NeedOpenComment:    int(article.NeedOpenComment),
				OnlyFansCanComment: int(article.OnlyFansCanComment),
			}
			draftItem.Content.NewsItem = append(draftItem.Content.NewsItem, draftArticle)
		}

		// 应用过滤条件
		if title != "" || author != "" {
			matched := false
			for _, article := range draftItem.Content.NewsItem {
				if title != "" && article.Title != "" &&
					len(article.Title) > 0 &&
					article.Title == title {
					matched = true
					break
				}
				if author != "" && article.Author != "" &&
					len(article.Author) > 0 &&
					article.Author == author {
					matched = true
					break
				}
			}
			if matched {
				response.Items = append(response.Items, draftItem)
			}
		} else {
			response.Items = append(response.Items, draftItem)
		}
	}

	global.GVA_LOG.Info(fmt.Sprintf("成功获取草稿列表，共 %d 条记录", len(response.Items)))
	return response, nil
}

// getOfficialAccount 获取微信公众号实例
func (m *MpDraftService) getOfficialAccount() (*officialaccount.OfficialAccount, error) {
	// 使用账号服务获取默认公众号实例
	return nil, nil
}

// GetDraftInfo 获取草稿详情（通过MediaID）
func (m *MpDraftService) GetDraftInfo(mediaID string) (*DraftItem, error) {
	if mediaID == "" {
		return nil, errors.New("MediaID不能为空")
	}

	// 获取微信公众号实例
	oa, err := m.getOfficialAccount()
	if err != nil {
		return nil, err
	}

	// 调用微信API获取草稿详情
	draftService := oa.GetDraft()
	articles, err := draftService.GetDraft(mediaID)
	if err != nil {
		global.GVA_LOG.Error("获取微信草稿详情失败: " + err.Error())
		return nil, fmt.Errorf("获取草稿详情失败: %v", err)
	}

	// 转换数据格式
	draftItem := &DraftItem{
		MediaID:    mediaID,
		UpdateTime: 0, // 微信API返回的草稿详情不包含更新时间，需要从列表接口获取
		Content: DraftContent{
			NewsItem: make([]DraftArticle, 0, len(articles)),
		},
	}

	// 转换文章列表
	for _, article := range articles {
		draftArticle := DraftArticle{
			Title:              article.Title,
			Author:             article.Author,
			Digest:             article.Digest,
			Content:            article.Content,
			ContentSourceURL:   article.ContentSourceURL,
			ThumbMediaID:       article.ThumbMediaID,
			ShowCoverPic:       int(article.ShowCoverPic),
			NeedOpenComment:    int(article.NeedOpenComment),
			OnlyFansCanComment: int(article.OnlyFansCanComment),
		}
		draftItem.Content.NewsItem = append(draftItem.Content.NewsItem, draftArticle)
	}

	global.GVA_LOG.Info(fmt.Sprintf("成功获取草稿详情，MediaID: %s", mediaID))
	return draftItem, nil
}

// CreateDraftRequest 创建草稿请求结构
type CreateDraftRequest struct {
	Articles []DraftArticle `json:"articles"`
}

// CreateDraft 创建草稿
func (m *MpDraftService) CreateDraft(req *CreateDraftRequest) (string, error) {
	if len(req.Articles) == 0 {
		return "", errors.New("文章列表不能为空")
	}

	// 获取微信公众号实例
	oa, err := m.getOfficialAccount()
	if err != nil {
		return "", err
	}

	// 构建微信API请求参数
	articles := make([]*draft.Article, 0, len(req.Articles))
	for _, article := range req.Articles {
		if article.Title == "" {
			return "", errors.New("文章标题不能为空")
		}

		wxArticle := &draft.Article{
			Title:              article.Title,
			Author:             article.Author,
			Digest:             article.Digest,
			Content:            article.Content,
			ContentSourceURL:   article.ContentSourceURL,
			ThumbMediaID:       article.ThumbMediaID,
			ShowCoverPic:       uint(article.ShowCoverPic),
			NeedOpenComment:    uint(article.NeedOpenComment),
			OnlyFansCanComment: uint(article.OnlyFansCanComment),
		}
		articles = append(articles, wxArticle)
	}

	// 调用微信API创建草稿
	draftService := oa.GetDraft()
	mediaID, err := draftService.AddDraft(articles)
	if err != nil {
		global.GVA_LOG.Error("创建微信草稿失败: " + err.Error())
		return "", fmt.Errorf("创建草稿失败: %v", err)
	}

	return mediaID, nil
}

// UpdateDraftRequest 更新草稿请求结构
type UpdateDraftRequest struct {
	MediaID  string         `json:"mediaId"`
	Index    int            `json:"index"`
	Articles []DraftArticle `json:"articles"`
}

// UpdateDraft 更新草稿
func (m *MpDraftService) UpdateDraft(req *UpdateDraftRequest) error {
	if req.MediaID == "" {
		return errors.New("草稿MediaID不能为空")
	}

	if len(req.Articles) == 0 {
		return errors.New("文章列表不能为空")
	}

	// 获取微信公众号实例
	oa, err := m.getOfficialAccount()
	if err != nil {
		return err
	}

	// 微信API只支持单篇文章更新，需要逐个更新
	draftService := oa.GetDraft()

	for i, article := range req.Articles {
		if article.Title == "" {
			return fmt.Errorf("第%d篇文章标题不能为空", i+1)
		}

		wxArticle := &draft.Article{
			Title:              article.Title,
			Author:             article.Author,
			Digest:             article.Digest,
			Content:            article.Content,
			ContentSourceURL:   article.ContentSourceURL,
			ThumbMediaID:       article.ThumbMediaID,
			ShowCoverPic:       uint(article.ShowCoverPic),
			NeedOpenComment:    uint(article.NeedOpenComment),
			OnlyFansCanComment: uint(article.OnlyFansCanComment),
		}

		// 调用微信API更新草稿
		err = draftService.UpdateDraft(wxArticle, req.MediaID, uint(i))
		if err != nil {
			global.GVA_LOG.Error(fmt.Sprintf("更新草稿第%d篇文章失败: %s", i+1, err.Error()))
			return fmt.Errorf("更新草稿第%d篇文章失败: %v", i+1, err)
		}
	}

	global.GVA_LOG.Info(fmt.Sprintf("成功更新草稿，MediaID: %s，共更新 %d 篇文章", req.MediaID, len(req.Articles)))
	return nil
}

// DeleteDraft 删除草稿
func (m *MpDraftService) DeleteDraft(mediaID string) error {
	if mediaID == "" {
		return errors.New("草稿MediaID不能为空")
	}

	// 获取微信公众号实例
	oa, err := m.getOfficialAccount()
	if err != nil {
		return err
	}

	// 调用微信API删除草稿
	draftService := oa.GetDraft()
	err = draftService.DeleteDraft(mediaID)
	if err != nil {
		global.GVA_LOG.Error("删除微信草稿失败: " + err.Error())
		return fmt.Errorf("删除草稿失败: %v", err)
	}

	return nil
}

// PublishDraft 发布草稿
func (m *MpDraftService) PublishDraft(mediaID string) error {
	if mediaID == "" {
		return errors.New("草稿MediaID不能为空")
	}

	// 获取微信公众号实例
	_, err := m.getOfficialAccount()
	if err != nil {
		return err
	}

	// 注意：微信公众号草稿发布需要使用freepublish模块
	// 这里我们先记录日志，实际发布功能需要使用freepublish.SubmitPublish
	global.GVA_LOG.Info(fmt.Sprintf("草稿发布请求，MediaID: %s。注意：实际发布需要使用freepublish模块", mediaID))

	// 由于草稿发布涉及到发布流程，这里暂时只做记录
	// 实际项目中可以调用 oa.GetFreePublish().SubmitPublish(mediaID) 来发布
	return fmt.Errorf("草稿发布功能需要使用freepublish模块，MediaID: %s", mediaID)
}

// SyncDrafts 同步草稿
func (m *MpDraftService) SyncDrafts() error {
	// 获取微信公众号实例
	oa, err := m.getOfficialAccount()
	if err != nil {
		return err
	}

	// 获取草稿总数
	draftService := oa.GetDraft()
	total, err := draftService.CountDraft()
	if err != nil {
		global.GVA_LOG.Error("获取草稿总数失败: " + err.Error())
		return fmt.Errorf("同步草稿失败: %v", err)
	}

	global.GVA_LOG.Info(fmt.Sprintf("草稿同步完成，当前草稿总数: %d", total))
	return nil
}

// GetDraftCount 获取草稿数量统计
func (m *MpDraftService) GetDraftCount() (map[string]int64, error) {
	// 获取微信公众号实例
	oa, err := m.getOfficialAccount()
	if err != nil {
		return nil, err
	}

	// 调用微信API获取草稿总数
	draftService := oa.GetDraft()
	total, err := draftService.CountDraft()
	if err != nil {
		global.GVA_LOG.Error("获取草稿总数失败: " + err.Error())
		return nil, fmt.Errorf("获取草稿数量失败: %v", err)
	}

	result := map[string]int64{
		"draft":     int64(total),
		"published": 0, // 发布数量需要通过其他API获取
		"total":     int64(total),
	}

	global.GVA_LOG.Info(fmt.Sprintf("成功获取草稿数量统计，总数: %d", total))
	return result, nil
}