package entity

// Permission 權限實體
type Permission struct {
	ID         int64          `gorm:"column:id;primaryKey" json:"id"`
	ParentID   int64          `gorm:"column:parent;index" json:"parent_id"`
	Name       string         `gorm:"column:name;size:100;index" json:"name"`
	HTTPMethod string         `gorm:"column:http_method;size:10" json:"http_method,omitempty"`
	HTTPPath   string         `gorm:"column:http_path;size:255" json:"http_path,omitempty"`
	Status     Status         `gorm:"column:status;index" json:"status"`
	Type       PermissionType `gorm:"column:type" json:"type"`

	TimeStamp
}

// TableName 指定表名
func (Permission) TableName() string {
	return "permission"
}

// IsActive 是否啟用
func (p *Permission) IsActive() bool {
	return p.Status.IsActive()
}

// IsParent 是否為父權限
func (p *Permission) IsParent() bool {
	return p.ParentID == 0
}

// IsAPIPermission 是否為 API 權限
func (p *Permission) IsAPIPermission() bool {
	return p.HTTPPath != "" && p.HTTPMethod != ""
}

// Validate 驗證資料
func (p *Permission) Validate() error {
	if p.Name == "" {
		return ErrInvalidData("permission name is required")
	}
	if p.ParentID < 0 {
		return ErrInvalidData("permission parent_id cannot be negative")
	}
	// API 權限必須有 path 和 method
	if (p.HTTPPath != "" && p.HTTPMethod == "") || (p.HTTPPath == "" && p.HTTPMethod != "") {
		return ErrInvalidData("permission http_path and http_method must be both set or both empty")
	}
	return nil
}

// RolePermission 角色權限關聯實體
type RolePermission struct {
	ID           int64 `gorm:"column:id;primaryKey" json:"id"`
	RoleID       int64 `gorm:"column:role_id;index:idx_role_permission" json:"role_id"`
	PermissionID int64 `gorm:"column:permission_id;index:idx_role_permission" json:"permission_id"`

	TimeStamp
}

// TableName 指定表名
func (RolePermission) TableName() string {
	return "role_permission"
}

// Validate 驗證資料
func (rp *RolePermission) Validate() error {
	if rp.RoleID <= 0 {
		return ErrInvalidData("role_id must be positive")
	}
	if rp.PermissionID <= 0 {
		return ErrInvalidData("permission_id must be positive")
	}
	return nil
}