package sql

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

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

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

// NewAuthorRepository creates a new AuthorRepository.
func NewAuthorRepository(db *gorm.DB, cfg *config.Config) domain.AuthorRepository {
	return &authorRepository{
		BaseRepository: NewBaseRepositoryImpl[domain.Author](db, cfg),
		db:             db,
		tracer:         otel.Tracer("author.repository"),
	}
}

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

// GetWithTranslations finds an author by ID and preloads their translations.
func (r *authorRepository) GetWithTranslations(ctx context.Context, id uint) (*domain.Author, error) {
	ctx, span := r.tracer.Start(ctx, "GetWithTranslations")
	defer span.End()
	var author domain.Author
	if err := r.db.WithContext(ctx).Preload("Translations").First(&author, id).Error; err != nil {
		return nil, err
	}
	return &author, nil
}

// ListByBookID finds authors by book ID
func (r *authorRepository) ListByBookID(ctx context.Context, bookID uint) ([]domain.Author, error) {
	ctx, span := r.tracer.Start(ctx, "ListByBookID")
	defer span.End()
	var authors []domain.Author
	if err := r.db.WithContext(ctx).Joins("JOIN book_authors ON book_authors.author_id = authors.id").
		Where("book_authors.book_id = ?", bookID).
		Find(&authors).Error; err != nil {
		return nil, err
	}
	return authors, nil
}

// ListByCountryID finds authors by country ID
func (r *authorRepository) ListByCountryID(ctx context.Context, countryID uint) ([]domain.Author, error) {
	ctx, span := r.tracer.Start(ctx, "ListByCountryID")
	defer span.End()
	var authors []domain.Author
	if err := r.db.WithContext(ctx).Where("country_id = ?", countryID).Find(&authors).Error; err != nil {
		return nil, err
	}
	return authors, nil
}