package tencent

import (
	"context"
	dao "dataengine/dao/tencent"
	dto "dataengine/model/dto/tencent"
	entity "dataengine/model/entity/tencent"
	"encoding/json"
	"fmt"
	"io"
	"math/rand"
	"net/http"
	"net/url"
	"time"

	"gitea.com/red-future/common/db/gfdb"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/sirupsen/logrus"
)

type imageService struct{}

var ImageService = new(imageService)

// API响应结构
type imageResponse struct {
	Code    int    `json:"code"`
	Message string `json:"message"`
	Data    struct {
		List []struct {
			ImageId                string `json:"image_id"`
			Width                  int    `json:"width"`
			Height                 int    `json:"height"`
			FileSize               int64  `json:"file_size"`
			Type                   string `json:"type"`
			Signature              string `json:"signature"`
			Description            string `json:"description"`
			SourceSignature        string `json:"source_signature"`
			PreviewUrl             string `json:"preview_url"`
			ThumbPreviewUrl        string `json:"thumb_preview_url"`
			SourceType             string `json:"source_type"`
			ImageUsage             string `json:"image_usage"`
			CreatedTime            int64  `json:"created_time"`
			LastModifiedTime       int64  `json:"last_modified_time"`
			ProductCatalogId       int64  `json:"product_catalog_id"`
			ProductOuterId         string `json:"product_outer_id"`
			SourceReferenceId      string `json:"source_reference_id"`
			OwnerAccountId         string `json:"owner_account_id"`
			Status                 string `json:"status"`
			SampleAspectRatio      string `json:"sample_aspect_ratio"`
			SourceMaterialId       string `json:"source_material_id"`
			NewSourceType          string `json:"new_source_type"`
			FirstPublicationStatus string `json:"first_publication_status"`
			QualityStatus          string `json:"quality_status"`
			SimilarityStatus       string `json:"similarity_status"`
			UserAigcStatus         string `json:"user_aigc_status"`
			SystemAigcStatus       string `json:"system_aigc_status"`
			AigcSource             string `json:"aigc_source"`
			AigcFlag               string `json:"aigc_flag"`
			MuseAigcVersion        int    `json:"muse_aigc_version"`
			AigcType               int    `json:"aigc_type"`
		} `json:"list"`
		PageInfo struct {
			Page        int `json:"page"`
			PageSize    int `json:"page_size"`
			TotalNumber int `json:"total_number"`
			TotalPage   int `json:"total_page"`
		} `json:"page_info"`
	} `json:"data"`
	TraceId string `json:"trace_id"`
}

// SyncAll 同步所有图片素材数据（遍历所有账户，自动分页）
func (s *imageService) SyncAll(ctx context.Context, req *dto.SyncImageReq) (res *dto.SyncImageRes, err error) {
	// 创建独立的context，避免HTTP请求超时导致context被取消
	// 设置30分钟超时，足够完成421个账户的同步任务
	independentCtx, cancel := context.WithTimeout(context.Background(), 30*time.Minute)
	defer cancel()

	// 保留原context中的user信息，供数据库中间件使用
	if user := ctx.Value("user"); user != nil {
		independentCtx = context.WithValue(independentCtx, "user", user)
	}

	// 获取access_token
	accessToken := req.AccessToken
	if accessToken == "" {
		accessToken = g.Cfg().MustGet(independentCtx, "tencent.oauth.access_token").String()
	}

	if accessToken == "" {
		return nil, fmt.Errorf("access_token不能为空")
	}

	res = &dto.SyncImageRes{}
	totalSynced := 0
	totalImages := 0

	// 获取所有账户列表
	accounts, err := s.getAccountList(independentCtx)
	if err != nil {
		return nil, fmt.Errorf("获取账户列表失败: %w", err)
	}

	res.TotalAccounts = len(accounts)
	logrus.Infof("开始同步腾讯广告图片素材 - 账户数: %d", len(accounts))

	// 遍历每个账户
	for _, account := range accounts {
		logrus.Infof("========== 开始处理账户: %d (%s) ==========", account.AccountID, account.CorporationName)

		// 获取该账户的所有图片（分页）
		accountImages, err := s.syncAccountImages(independentCtx, accessToken, account.AccountID)
		if err != nil {
			logrus.Errorf("账户 %d 同步失败: %v，继续下一个账户", account.AccountID, err)
			continue
		}

		totalImages += accountImages
		totalSynced += accountImages

		// 避免请求过快，休眠200ms
		time.Sleep(200 * time.Millisecond)
	}

	res.TotalImages = totalImages
	res.SyncedCount = totalSynced
	res.Message = fmt.Sprintf("同步完成，共处理 %d 个账户，%d 条图片记录", res.TotalAccounts, totalSynced)

	logrus.Infof("同步完成 - 账户数: %d, 总图片数: %d, 成功同步: %d", res.TotalAccounts, totalImages, totalSynced)

	return res, nil
}

// getAccountList 获取所有账户列表
func (s *imageService) getAccountList(ctx context.Context) ([]entity.AccountRelation, error) {
	var accounts []entity.AccountRelation
	err := gfdb.DB(ctx).Model(ctx, "tencent_account_relation").
		WhereNull("deleted_at").
		Scan(&accounts)

	return accounts, err
}

// syncAccountImages 同步单个账户的图片数据
func (s *imageService) syncAccountImages(ctx context.Context, accessToken string, accountId int64) (int, error) {
	totalSynced := 0

	// 先获取第一页，得到总页数
	firstPageData, err := s.fetchPage(ctx, accessToken, accountId, 1, 100)
	if err != nil {
		return 0, fmt.Errorf("获取第一页数据失败: %w", err)
	}

	totalPage := firstPageData.Data.PageInfo.TotalPage
	logrus.Infof("账户 %d - 总页数: %d, 总记录数: %d", accountId, totalPage, firstPageData.Data.PageInfo.TotalNumber)

	// 处理第一页数据
	synced, err := s.savePageData(ctx, firstPageData, accountId)
	if err != nil {
		logrus.Errorf("保存第一页数据失败: %v", err)
	}
	totalSynced += synced

	// 循环获取剩余页
	for page := 2; page <= totalPage; page++ {
		logrus.Infof("账户 %d - 正在获取第 %d/%d 页...", accountId, page, totalPage)

		pageData, err := s.fetchPage(ctx, accessToken, accountId, page, 100)
		if err != nil {
			logrus.Errorf("账户 %d - 获取第 %d 页失败: %v，继续下一页", accountId, page, err)
			continue
		}

		synced, err := s.savePageData(ctx, pageData, accountId)
		if err != nil {
			logrus.Errorf("账户 %d - 保存第 %d 页数据失败: %v", accountId, page, err)
			continue
		}
		totalSynced += synced

		// 避免请求过快，休眠100ms
		time.Sleep(100 * time.Millisecond)
	}

	logrus.Infof("账户 %d - 同步完成，共 %d 条记录", accountId, totalSynced)
	return totalSynced, nil
}

// fetchPage 获取单页数据
func (s *imageService) fetchPage(ctx context.Context, accessToken string, accountId int64, page, pageSize int) (*imageResponse, error) {
	// 构建filtering参数：状态为正常
	filtering := `[{"field":"status","operator":"EQUALS","values":["ADSTATUS_NORMAL"]}]`

	// URL编码filtering参数
	encodedFiltering := url.QueryEscape(filtering)

	// 在发送请求前生成最新的时间戳和nonce，避免时间戳过期
	timestamp := time.Now().Unix()
	// 使用时间戳+纳秒后6位+随机数，确保唯一性且不超过32字符
	nanoSuffix := time.Now().UnixNano() % 1000000 // 取纳秒的后6位
	nonce := fmt.Sprintf("%d%06d%d", timestamp, nanoSuffix, rand.Intn(1000))

	urlStr := fmt.Sprintf("https://api.e.qq.com/v3.0/images/get?access_token=%s&nonce=%s&timestamp=%d&account_id=%d&filtering=%s&page=%d&page_size=%d",
		accessToken, nonce, timestamp, accountId, encodedFiltering, page, pageSize)

	logrus.Debugf("请求URL: %s", urlStr)

	httpReq, err := http.NewRequestWithContext(ctx, "GET", urlStr, nil)
	if err != nil {
		return nil, fmt.Errorf("创建请求失败: %w", err)
	}

	client := &http.Client{Timeout: 30 * time.Second}
	resp, err := client.Do(httpReq)
	if err != nil {
		return nil, fmt.Errorf("请求失败: %w", err)
	}
	defer resp.Body.Close()

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("读取响应失败: %w", err)
	}

	logrus.Debugf("API响应: %s", string(body))

	var result imageResponse
	if err := json.Unmarshal(body, &result); err != nil {
		return nil, fmt.Errorf("解析响应失败: %w", err)
	}

	if result.Code != 0 {
		return nil, fmt.Errorf("API错误: code=%d, message=%s", result.Code, result.Message)
	}

	return &result, nil
}

// savePageData 保存单页数据到数据库
func (s *imageService) savePageData(ctx context.Context, data *imageResponse, accountId int64) (int, error) {
	if len(data.Data.List) == 0 {
		return 0, nil
	}

	logrus.Infof("准备保存 %d 条图片素材数据", len(data.Data.List))

	var items []*entity.Image
	for _, item := range data.Data.List {
		image := &entity.Image{
			ImageId:                item.ImageId,
			AccountId:              accountId,
			Width:                  item.Width,
			Height:                 item.Height,
			FileSize:               item.FileSize,
			Type:                   item.Type,
			Signature:              item.Signature,
			Description:            item.Description,
			SourceSignature:        item.SourceSignature,
			PreviewUrl:             item.PreviewUrl,
			ThumbPreviewUrl:        item.ThumbPreviewUrl,
			SourceType:             item.SourceType,
			ImageUsage:             item.ImageUsage,
			CreatedTime:            item.CreatedTime,
			LastModifiedTime:       item.LastModifiedTime,
			ProductCatalogId:       item.ProductCatalogId,
			ProductOuterId:         item.ProductOuterId,
			SourceReferenceId:      item.SourceReferenceId,
			OwnerAccountId:         item.OwnerAccountId,
			Status:                 item.Status,
			SampleAspectRatio:      item.SampleAspectRatio,
			SourceMaterialId:       item.SourceMaterialId,
			NewSourceType:          item.NewSourceType,
			FirstPublicationStatus: item.FirstPublicationStatus,
			QualityStatus:          item.QualityStatus,
			SimilarityStatus:       item.SimilarityStatus,
			UserAigcStatus:         item.UserAigcStatus,
			SystemAigcStatus:       item.SystemAigcStatus,
			AigcSource:             item.AigcSource,
			AigcFlag:               item.AigcFlag,
			MuseAigcVersion:        item.MuseAigcVersion,
			AigcType:               item.AigcType,
		}
		// 设置 TenantID（框架将0视为空值，所以使用1）
		image.TenantId = 1
		// 设置默认校验状态为待校验
		image.VerifyStatus = "PENDING"

		items = append(items, image)
	}

	logrus.Infof("调用 BatchUpsert...")
	successCount, err := dao.Image.BatchUpsert(ctx, items)
	logrus.Infof("BatchUpsert 返回: successCount=%d, err=%v", successCount, err)

	return successCount, err
}

// ListAll 获取所有图片素材
func (s *imageService) ListAll(ctx context.Context) ([]entity.Image, error) {
	return dao.Image.ListAll(ctx)
}

// ListWithPage 分页查询图片素材（支持时间过滤）
func (s *imageService) ListWithPage(ctx context.Context, req *dto.ListImageQueryReq) (*dto.ListImageRes, error) {
	// 设置默认值
	page := req.Page
	if page <= 0 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 20
	}
	if pageSize > 100 {
		pageSize = 100 // 限制最大每页数量
	}

	// 调用DAO层查询
	list, total, err := dao.Image.ListWithPage(ctx, page, pageSize, req.AccountId, req.StartTime, req.EndTime, req.Status)
	if err != nil {
		return nil, fmt.Errorf("查询图片素材失败: %w", err)
	}

	// 计算总页数
	totalPages := (total + pageSize - 1) / pageSize
	if totalPages == 0 && total > 0 {
		totalPages = 1
	}

	// 转换为DTO
	items := make([]dto.ImageItem, 0, len(list))
	for _, item := range list {
		items = append(items, dto.ImageItem{
			Id:               item.Id,
			ImageId:          item.ImageId,
			AccountId:        item.AccountId,
			Width:            item.Width,
			Height:           item.Height,
			FileSize:         item.FileSize,
			Type:             item.Type,
			Signature:        item.Signature,
			Description:      item.Description,
			PreviewUrl:       item.PreviewUrl,
			ThumbPreviewUrl:  item.ThumbPreviewUrl,
			Status:           item.Status,
			CreatedTime:      item.CreatedTime,
			LastModifiedTime: item.LastModifiedTime,
			CreatedAt:        item.CreatedAt.Format("2006-01-02 15:04:05"),
			UpdatedAt:        item.UpdatedAt.Format("2006-01-02 15:04:05"),
		})
	}

	res := &dto.ListImageRes{
		List:       items,
		Total:      total,
		Page:       page,
		PageSize:   pageSize,
		TotalPages: totalPages,
	}

	logrus.Infof("查询图片素材 - 页码: %d, 每页: %d, 总数: %d, 总页数: %d", page, pageSize, total, totalPages)

	return res, nil
}