package repositories

import (
	"context"
	"errors"
	"gorm.io/gorm"
	"tercul/models"
	"time"
)

// UserSessionRepository defines CRUD methods specific to UserSession.
type UserSessionRepository interface {
	BaseRepository[models.UserSession]
	GetByToken(ctx context.Context, token string) (*models.UserSession, error)
	GetByUserID(ctx context.Context, userID uint) ([]models.UserSession, error)
	DeleteExpired(ctx context.Context) error
}

type userSessionRepository struct {
	BaseRepository[models.UserSession]
	db *gorm.DB
}

// NewUserSessionRepository creates a new UserSessionRepository.
func NewUserSessionRepository(db *gorm.DB) UserSessionRepository {
	return &userSessionRepository{
		BaseRepository: NewBaseRepositoryImpl[models.UserSession](db),
		db:             db,
	}
}

// GetByToken finds a session by token
func (r *userSessionRepository) GetByToken(ctx context.Context, token string) (*models.UserSession, error) {
	var session models.UserSession
	if err := r.db.WithContext(ctx).Where("token = ?", token).First(&session).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return nil, ErrEntityNotFound
		}
		return nil, err
	}
	return &session, nil
}

// GetByUserID finds sessions by user ID
func (r *userSessionRepository) GetByUserID(ctx context.Context, userID uint) ([]models.UserSession, error) {
	var sessions []models.UserSession
	if err := r.db.WithContext(ctx).Where("user_id = ?", userID).Find(&sessions).Error; err != nil {
		return nil, err
	}
	return sessions, nil
}

// DeleteExpired deletes expired sessions
func (r *userSessionRepository) DeleteExpired(ctx context.Context) error {
	if err := r.db.WithContext(ctx).Where("expires_at < ?", time.Now()).Delete(&models.UserSession{}).Error; err != nil {
		return err
	}
	return nil
}