package sql

import (
	"context"
	"tercul/internal/domain"

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

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

// NewCollectionRepository creates a new CollectionRepository.
func NewCollectionRepository(db *gorm.DB) domain.CollectionRepository {
	return &collectionRepository{
		BaseRepository: NewBaseRepositoryImpl[domain.Collection](db),
		db:             db,
		tracer:         otel.Tracer("collection.repository"),
	}
}

// ListByUserID finds collections by user ID
func (r *collectionRepository) ListByUserID(ctx context.Context, userID uint) ([]domain.Collection, error) {
	ctx, span := r.tracer.Start(ctx, "ListByUserID")
	defer span.End()
	var collections []domain.Collection
	if err := r.db.WithContext(ctx).Where("user_id = ?", userID).Find(&collections).Error; err != nil {
		return nil, err
	}
	return collections, nil
}

// AddWorkToCollection adds a work to a collection
func (r *collectionRepository) AddWorkToCollection(ctx context.Context, collectionID uint, workID uint) error {
	ctx, span := r.tracer.Start(ctx, "AddWorkToCollection")
	defer span.End()
	return r.db.WithContext(ctx).Exec("INSERT INTO collection_works (collection_id, work_id) VALUES (?, ?) ON CONFLICT DO NOTHING", collectionID, workID).Error
}

// RemoveWorkFromCollection removes a work from a collection
func (r *collectionRepository) RemoveWorkFromCollection(ctx context.Context, collectionID uint, workID uint) error {
	ctx, span := r.tracer.Start(ctx, "RemoveWorkFromCollection")
	defer span.End()
	return r.db.WithContext(ctx).Exec("DELETE FROM collection_works WHERE collection_id = ? AND work_id = ?", collectionID, workID).Error
}

// ListPublic finds public collections
func (r *collectionRepository) ListPublic(ctx context.Context) ([]domain.Collection, error) {
	ctx, span := r.tracer.Start(ctx, "ListPublic")
	defer span.End()
	var collections []domain.Collection
	if err := r.db.WithContext(ctx).Where("is_public = ?", true).Find(&collections).Error; err != nil {
		return nil, err
	}
	return collections, nil
}

// ListByWorkID finds collections by work ID
func (r *collectionRepository) ListByWorkID(ctx context.Context, workID uint) ([]domain.Collection, error) {
	ctx, span := r.tracer.Start(ctx, "ListByWorkID")
	defer span.End()
	var collections []domain.Collection
	if err := r.db.WithContext(ctx).Joins("JOIN collection_works ON collection_works.collection_id = collections.id").
		Where("collection_works.work_id = ?", workID).
		Find(&collections).Error; err != nil {
		return nil, err
	}
	return collections, nil
}