package sql

import (
	"context"
	"errors"
	"tercul/internal/domain"
	"tercul/internal/platform/config"
	"time"

	"go.opentelemetry.io/otel"
	"go.opentelemetry.io/otel/trace"
	"gorm.io/gorm"
)

type emailVerificationRepository struct {
	domain.BaseRepository[domain.EmailVerification]
	db     *gorm.DB
	tracer trace.Tracer
}

// NewEmailVerificationRepository creates a new EmailVerificationRepository.
func NewEmailVerificationRepository(db *gorm.DB, cfg *config.Config) domain.EmailVerificationRepository {
	return &emailVerificationRepository{
		BaseRepository: NewBaseRepositoryImpl[domain.EmailVerification](db, cfg),
		db:             db,
		tracer:         otel.Tracer("email_verification.repository"),
	}
}

// GetByToken finds a verification by token (only unused and non-expired)
func (r *emailVerificationRepository) GetByToken(ctx context.Context, token string) (*domain.EmailVerification, error) {
	ctx, span := r.tracer.Start(ctx, "GetByToken")
	defer span.End()
	var verification domain.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, domain.ErrEntityNotFound
		}
		return nil, err
	}
	return &verification, nil
}

// GetByUserID finds verifications by user ID
func (r *emailVerificationRepository) GetByUserID(ctx context.Context, userID uint) ([]domain.EmailVerification, error) {
	ctx, span := r.tracer.Start(ctx, "GetByUserID")
	defer span.End()
	var verifications []domain.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 {
	ctx, span := r.tracer.Start(ctx, "DeleteExpired")
	defer span.End()
	if err := r.db.WithContext(ctx).Where("expires_at < ?", time.Now()).Delete(&domain.EmailVerification{}).Error; err != nil {
		return err
	}
	return nil
}

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