package dto

import (
	"time"

	"photography-backend/internal/model/entity"
)

// CreateCategoryRequest 创建分类请求
type CreateCategoryRequest struct {
	Name        string `json:"name" binding:"required,min=1,max=100" validate:"required,min=1,max=100"`
	Description string `json:"description" binding:"omitempty,max=1000" validate:"omitempty,max=1000"`
	Slug        string `json:"slug" binding:"omitempty,min=1,max=100" validate:"omitempty,min=1,max=100"`
	ParentID    *uint  `json:"parent_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	Color       string `json:"color" binding:"omitempty,len=7" validate:"omitempty,len=7"`
	CoverImage  string `json:"cover_image" binding:"omitempty,url" validate:"omitempty,url"`
	SortOrder   int    `json:"sort_order" binding:"omitempty,min=0" validate:"omitempty,min=0"`
}

// UpdateCategoryRequest 更新分类请求
type UpdateCategoryRequest struct {
	Name        *string `json:"name" binding:"omitempty,min=1,max=100" validate:"omitempty,min=1,max=100"`
	Description *string `json:"description" binding:"omitempty,max=1000" validate:"omitempty,max=1000"`
	Slug        *string `json:"slug" binding:"omitempty,min=1,max=100" validate:"omitempty,min=1,max=100"`
	ParentID    *uint   `json:"parent_id" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	Color       *string `json:"color" binding:"omitempty,len=7" validate:"omitempty,len=7"`
	CoverImage  *string `json:"cover_image" binding:"omitempty,url" validate:"omitempty,url"`
	SortOrder   *int    `json:"sort_order" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	IsActive    *bool   `json:"is_active" binding:"omitempty"`
}

// CategoryResponse 分类响应
type CategoryResponse struct {
	ID          uint      `json:"id"`
	Name        string    `json:"name"`
	Description string    `json:"description"`
	Slug        string    `json:"slug"`
	ParentID    *uint     `json:"parent_id"`
	Color       string    `json:"color"`
	CoverImage  string    `json:"cover_image"`
	Sort        int       `json:"sort"`
	IsActive    bool      `json:"is_active"`
	PhotoCount  int64     `json:"photo_count"`
	AlbumCount  int64     `json:"album_count"`
	CreatedAt   time.Time `json:"created_at"`
	UpdatedAt   time.Time `json:"updated_at"`
}

// CategoryTreeResponse 分类树响应
type CategoryTreeResponse struct {
	ID          uint                   `json:"id"`
	Name        string                 `json:"name"`
	Description string                 `json:"description"`
	Slug        string                 `json:"slug"`
	ParentID    *uint                  `json:"parent_id"`
	Color       string                 `json:"color"`
	CoverImage  string                 `json:"cover_image"`
	Sort        int                    `json:"sort"`
	IsActive    bool                   `json:"is_active"`
	PhotoCount  int64                  `json:"photo_count"`
	AlbumCount  int64                  `json:"album_count"`
	Children    []CategoryTreeResponse `json:"children"`
	CreatedAt   time.Time              `json:"created_at"`
	UpdatedAt   time.Time              `json:"updated_at"`
}

// ListCategoriesOptions 分类列表查询选项
type ListCategoriesOptions struct {
	Page      int    `json:"page" form:"page" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	Limit     int    `json:"limit" form:"limit" binding:"omitempty,min=1,max=100" validate:"omitempty,min=1,max=100"`
	Sort      string `json:"sort" form:"sort" binding:"omitempty,oneof=id name sort created_at updated_at" validate:"omitempty,oneof=id name sort created_at updated_at"`
	Order     string `json:"order" form:"order" binding:"omitempty,oneof=asc desc" validate:"omitempty,oneof=asc desc"`
	ParentID  *uint  `json:"parent_id" form:"parent_id" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	IsActive  *bool  `json:"is_active" form:"is_active" binding:"omitempty"`
	Search    string `json:"search" form:"search" binding:"omitempty,max=100" validate:"omitempty,max=100"`
	WithCount bool   `json:"with_count" form:"with_count" binding:"omitempty"`
}

// CategoryListResponse 分类列表响应
type CategoryListResponse struct {
	Categories []CategoryResponse `json:"categories"`
	Total      int64              `json:"total"`
	Page       int                `json:"page"`
	Limit      int                `json:"limit"`
}

// ReorderCategoriesRequest 重新排序分类请求
type ReorderCategoriesRequest struct {
	ParentID    *uint  `json:"parent_id" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	CategoryIDs []uint `json:"category_ids" binding:"required,min=1" validate:"required,min=1"`
}

// CategoryStatsResponse 分类统计响应
type CategoryStatsResponse struct {
	Total       int64                 `json:"total"`
	Active      int64                 `json:"active"`
	TopLevel    int64                 `json:"top_level"`
	PhotoCounts map[string]int64      `json:"photo_counts"`
	Popular     []CategoryResponse    `json:"popular"`
}

// ConvertToCategoryResponse 将分类实体转换为响应DTO
func ConvertToCategoryResponse(category *entity.Category) *CategoryResponse {
	if category == nil {
		return nil
	}

	return &CategoryResponse{
		ID:          category.ID,
		Name:        category.Name,
		Description: category.Description,
		ParentID:    category.ParentID,
		Color:       category.Color,
		CoverImage:  category.CoverImage,
		Sort:        category.Sort,
		IsActive:    category.IsActive,
		PhotoCount:  category.PhotoCount,
		CreatedAt:   category.CreatedAt,
		UpdatedAt:   category.UpdatedAt,
	}
}

// ConvertToCategoryTreeResponse 将分类树转换为响应DTO
func ConvertToCategoryTreeResponse(tree []entity.CategoryTree) []CategoryTreeResponse {
	result := make([]CategoryTreeResponse, len(tree))
	for i, category := range tree {
		result[i] = CategoryTreeResponse{
			ID:          category.ID,
			Name:        category.Name,
			Description: category.Description,
			ParentID:    category.ParentID,
			Color:       category.Color,
			CoverImage:  category.CoverImage,
			Sort:        category.Sort,
			IsActive:    category.IsActive,
			PhotoCount:  category.PhotoCount,
			Children:    ConvertToCategoryTreeResponse(category.Children),
			CreatedAt:   category.CreatedAt,
			UpdatedAt:   category.UpdatedAt,
		}
	}
	return result
}