package photo

import (
	"context"

	"photography-backend/internal/svc"
	"photography-backend/internal/types"
	"photography-backend/pkg/errorx"

	"github.com/zeromicro/go-zero/core/logx"
)

type GetPhotoListLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

// 获取照片列表
func NewGetPhotoListLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetPhotoListLogic {
	return &GetPhotoListLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *GetPhotoListLogic) GetPhotoList(req *types.GetPhotoListRequest) (resp *types.GetPhotoListResponse, err error) {
	// 1. 查询照片列表
	photos, err := l.svcCtx.PhotoModel.FindList(l.ctx, req.Page, req.PageSize, req.CategoryId, req.UserId, req.Keyword)
	if err != nil {
		logx.Errorf("查询照片列表失败: %v", err)
		return nil, errorx.NewWithCode(errorx.ServerError)
	}
	
	// 2. 统计总数
	total, err := l.svcCtx.PhotoModel.Count(l.ctx, req.CategoryId, req.UserId, req.Keyword)
	if err != nil {
		logx.Errorf("统计照片数量失败: %v", err)
		return nil, errorx.NewWithCode(errorx.ServerError)
	}
	
	// 3. 转换数据结构
	var photoList []types.Photo
	for _, photo := range photos {
		photoList = append(photoList, types.Photo{
			Id:            photo.Id,
			Title:         photo.Title,
			Description:   photo.Description.String,
			FilePath:      photo.FilePath,
			ThumbnailPath: photo.ThumbnailPath,
			UserId:        photo.UserId,
			CategoryId:    photo.CategoryId,
			CreatedAt:     photo.CreatedAt.Unix(),
			UpdatedAt:     photo.UpdatedAt.Unix(),
		})
	}
	
	// 4. 返回结果
	return &types.GetPhotoListResponse{
		BaseResponse: types.BaseResponse{
			Code:    errorx.Success,
			Message: "查询成功",
		},
		Data: types.PhotoListData{
			PageResponse: types.PageResponse{
				Total: total,
				Page:  req.Page,
				Size:  req.PageSize,
			},
			Photos: photoList,
		},
	}, nil
}