package models

import (
	"time"

	"gorm.io/gorm"
)

// Article status constants.
const (
	ArticleDraft     = 0 // 草稿
	ArticlePublished = 1 // 已发布
	ArticleArchived  = 2 // 已归档
)

// Article represents a blog post.
type Article struct {
	ID        uint           `gorm:"primarykey" json:"id"`
	CreatedAt time.Time      `json:"created_at"`
	UpdatedAt time.Time      `json:"updated_at"`
	DeletedAt gorm.DeletedAt `gorm:"uniqueIndex:idx_slug_deleted_at" json:"deleted_at"`
	AuthorID  uint           `gorm:"not null;index" json:"author_id"`
	Title     string         `gorm:"not null;size:255" json:"title"`
	Summary   string         `gorm:"size:512" json:"summary"`
	Content   string         `gorm:"type:text;not null" json:"content"`
	Cover     string         `gorm:"size:512" json:"cover"`
	Status    int            `gorm:"default:0;index" json:"status"`
	IsTop     bool           `gorm:"default:false" json:"is_top"`
	ViewCount int            `gorm:"default:0" json:"view_count"`
	Slug      string         `gorm:"uniqueIndex:idx_slug_deleted_at;size:255" json:"slug"`
	PublishedAt *time.Time   `gorm:"index" json:"published_at"`
	Author    User           `gorm:"foreignKey:AuthorID" json:"-"`
	Tags      []Tag          `gorm:"many2many:article_tags;" json:"tags"`
}

// TableName overrides the default GORM table name.
func (Article) TableName() string {
	return "articles"
}