package repositories

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

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

type emailVerificationRepository struct {
	BaseRepository[models.EmailVerification]
	db *gorm.DB
}

// NewEmailVerificationRepository creates a new EmailVerificationRepository.
func NewEmailVerificationRepository(db *gorm.DB) EmailVerificationRepository {
	return &emailVerificationRepository{
		BaseRepository: NewBaseRepositoryImpl[models.EmailVerification](db),
		db:             db,
	}
}

// GetByToken finds a verification by token (only unused and non-expired)
func (r *emailVerificationRepository) GetByToken(ctx context.Context, token string) (*models.EmailVerification, error) {
	var verification models.EmailVerification
	if err := r.db.WithContext(ctx).Where("token = ? AND used = ? AND expires_at > ?", token, false, time.Now()).First(&verification).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return nil, ErrEntityNotFound
		}
		return nil, err
	}
	return &verification, nil
}

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

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

// MarkAsUsed marks a verification as used
func (r *emailVerificationRepository) MarkAsUsed(ctx context.Context, id uint) error {
	if err := r.db.WithContext(ctx).Model(&models.EmailVerification{}).Where("id = ?", id).Update("used", true).Error; err != nil {
		return err
	}
	return nil
}