package models

import (
	"time"

	"github.com/google/uuid"
	"gorm.io/gorm"
)

// Notification represents a user notification
// BE-SVC-009: Implement notification service
type Notification struct {
	ID        uuid.UUID      `gorm:"type:uuid;primaryKey" json:"id" db:"id"`
	UserID    uuid.UUID      `gorm:"type:uuid;not null;index:idx_notifications_user_id" json:"user_id" db:"user_id"`
	Type      string         `gorm:"type:varchar(50);not null;index:idx_notifications_type" json:"type" db:"type"`
	Title     string         `gorm:"type:varchar(255);not null" json:"title" db:"title"`
	Content   string         `gorm:"type:text" json:"content" db:"content"`
	Link      string         `gorm:"type:varchar(500)" json:"link,omitempty" db:"link"`
	Read      bool           `gorm:"default:false;index:idx_notifications_user_id_read" json:"read" db:"read"`
	ReadAt    *time.Time     `json:"read_at,omitempty" db:"read_at"`
	CreatedAt time.Time      `gorm:"autoCreateTime;index:idx_notifications_created_at_desc" json:"created_at" db:"created_at"`
	UpdatedAt time.Time      `gorm:"autoUpdateTime" json:"updated_at" db:"updated_at"`
	DeletedAt gorm.DeletedAt `gorm:"index" json:"-" db:"deleted_at"`

	// Relations
	User User `gorm:"foreignKey:UserID;constraint:OnDelete:CASCADE" json:"-"`
}

// TableName defines the table name for GORM
func (Notification) TableName() string {
	return "notifications"
}

// BeforeCreate hook GORM pour générer UUID si non défini
func (n *Notification) BeforeCreate(tx *gorm.DB) error {
	if n.ID == uuid.Nil {
		n.ID = uuid.New()
	}
	return nil
}

// MarkAsRead marks the notification as read
func (n *Notification) MarkAsRead() {
	n.Read = true
	now := time.Now()
	n.ReadAt = &now
}