package db

func (d *DB) GetAllDomains() ([]DomainStats, error) {
	var domains []Domain
	if err := d.Order("name ASC").Find(&domains).Error; err != nil {
		return nil, err
	}

	stats := make([]DomainStats, len(domains))
	for i, dom := range domains {
		var userCount, aliasCount int64
		d.Model(&User{}).Where("domain_id = ?", dom.ID).Count(&userCount)
		d.Model(&Alias{}).Where("domain_id = ?", dom.ID).Count(&aliasCount)

		stats[i] = DomainStats{
			ID:         dom.ID,
			Name:       dom.Name,
			UserCount:  userCount,
			AliasCount: aliasCount,
		}
	}

	if stats == nil {
		stats = []DomainStats{}
	}
	return stats, nil
}

func (d *DB) GetDomainByID(id uint) (*Domain, error) {
	var domain Domain
	if err := d.Where("id = ?", id).First(&domain).Error; err != nil {
		return nil, err
	}
	return &domain, nil
}

func (d *DB) GetDomainByName(name string) (*Domain, error) {
	var domain Domain
	if err := d.Where("name = ?", name).First(&domain).Error; err != nil {
		return nil, err
	}
	return &domain, nil
}

func (d *DB) CreateDomain(name string) (*Domain, error) {
	domain := Domain{Name: name}
	if err := d.Create(&domain).Error; err != nil {
		return nil, err
	}
	return &domain, nil
}

func (d *DB) DeleteDomain(id uint) error {
	tx := d.Begin()
	defer func() { tx.Rollback() }()

	if err := tx.Where("domain_id = ?", id).Delete(&User{}).Error; err != nil {
		return err
	}
	if err := tx.Where("domain_id = ?", id).Delete(&Alias{}).Error; err != nil {
		return err
	}
	if err := tx.Delete(&Domain{}, id).Error; err != nil {
		return err
	}

	return tx.Commit().Error
}