package models

import (
	"path/filepath"
	"time"

	"gorm.io/gorm"
)

type Album struct {
	ID        uint32    `gorm:"primary_key" json:"id"`
	Name      string    `gorm:"not null" json:"name"`
	Fullname  string    `gorm:"-" json:"fullname"`
	Parent    *Album    `gorm:"constraint:OnDelete:SET NULL,OnUpdate:CASCADE" json:"-"`
	ParentId  *uint32   `json:"parent_id"`
	Author    *Account  `gorm:"constraint:OnDelete:SET NULL,OnUpdate:CASCADE" json:"author"`
	AuthorId  *uint32   `json:"-"`
	Photos    []*Photo  `gorm:"many2many:album_photos" json:"-"`
	CreatedAt time.Time `json:"created_at"`
	UpdatedAt time.Time `json:"updated_at"`
}

func (a *Album) AfterFind(tx *gorm.DB) error {
	a.ComputeFullpath(tx)
	return nil
}

func (a *Album) AfterCreate(tx *gorm.DB) error {
	a.ComputeFullpath(tx)
	return nil
}

func (a *Album) ComputeFullpath(tx *gorm.DB) error {
	if a.ParentId == nil {
		a.Fullname = a.Name
	} else {
		parent := &Album{}
		if err := tx.Session(&gorm.Session{NewDB: true}).Select("name", "parent_id").First(parent, "id = ?", a.ParentId).Error; err != nil {
			return err
		}
		a.Fullname = filepath.Join(parent.Fullname, a.Name)
	}
	return nil
}