package models

import (
	"time"
	"gorm.io/gorm"
)

// Category 分类模型
type Category struct {
	ID          uint           `gorm:"primaryKey" json:"id"`
	Name        string         `gorm:"size:100;not null" json:"name"`
	Description string         `gorm:"type:text" json:"description"`
	ParentID    *uint          `json:"parent_id"`
	Parent      *Category      `gorm:"foreignKey:ParentID" json:"parent,omitempty"`
	Children    []Category     `gorm:"foreignKey:ParentID" json:"children,omitempty"`
	Color       string         `gorm:"size:7;default:#3b82f6" json:"color"`
	CoverImage  string         `gorm:"size:500" json:"cover_image"`
	Sort        int            `gorm:"default:0" json:"sort"`
	IsActive    bool           `gorm:"default:true" json:"is_active"`
	PhotoCount  int            `gorm:"-" json:"photo_count"`
	CreatedAt   time.Time      `json:"created_at"`
	UpdatedAt   time.Time      `json:"updated_at"`
	DeletedAt   gorm.DeletedAt `gorm:"index" json:"-"`
}

// TableName 返回分类表名
func (Category) TableName() string {
	return "categories"
}

// CreateCategoryRequest 创建分类请求
type CreateCategoryRequest struct {
	Name        string `json:"name" binding:"required,max=100"`
	Description string `json:"description"`
	ParentID    *uint  `json:"parent_id"`
	Color       string `json:"color" binding:"omitempty,hexcolor"`
	CoverImage  string `json:"cover_image" binding:"omitempty,max=500"`
	Sort        int    `json:"sort"`
}

// UpdateCategoryRequest 更新分类请求
type UpdateCategoryRequest struct {
	Name        *string `json:"name" binding:"omitempty,max=100"`
	Description *string `json:"description"`
	ParentID    *uint   `json:"parent_id"`
	Color       *string `json:"color" binding:"omitempty,hexcolor"`
	CoverImage  *string `json:"cover_image" binding:"omitempty,max=500"`
	Sort        *int    `json:"sort"`
	IsActive    *bool   `json:"is_active"`
}

// CategoryListParams 分类列表查询参数
type CategoryListParams struct {
	IncludeStats bool `form:"include_stats"`
	IncludeTree  bool `form:"include_tree"`
	ParentID     uint `form:"parent_id"`
	IsActive     bool `form:"is_active"`
}

// CategoryResponse 分类响应
type CategoryResponse struct {
	*Category
}

// CategoryTreeNode 分类树节点
type CategoryTreeNode struct {
	ID         uint               `json:"id"`
	Name       string             `json:"name"`
	PhotoCount int                `json:"photo_count"`
	Children   []CategoryTreeNode `json:"children"`
}

// CategoryListResponse 分类列表响应
type CategoryListResponse struct {
	Categories []CategoryResponse `json:"categories"`
	Tree       []CategoryTreeNode `json:"tree,omitempty"`
	Stats      *CategoryStats     `json:"stats,omitempty"`
}

// CategoryStats 分类统计
type CategoryStats struct {
	TotalCategories int `json:"total_categories"`
	MaxLevel        int `json:"max_level"`
	FeaturedCount   int `json:"featured_count"`
}