package repository

import (
	"butterfliu/internal/model"
	"database/sql"
)

type ArtistRepository struct {
	db *sql.DB
}

func NewArtistRepository(db *sql.DB) *ArtistRepository {
	return &ArtistRepository{db: db}
}

func (r *ArtistRepository) Get(id int) (model.Artist, error) {
	row := r.db.QueryRow("SELECT id, name FROM artists WHERE id = ?", id)
	var artist model.Artist
	if err := row.Scan(&artist.ID, &artist.Name); err != nil {
		return model.Artist{}, err
	}
	return artist, nil
}

func (r *ArtistRepository) GetByName(name string) (model.Artist, error) {
	row := r.db.QueryRow("SELECT id, name FROM artists WHERE name = ?", name)
	var artist model.Artist
	if err := row.Scan(&artist.ID, &artist.Name); err != nil {
		return model.Artist{}, err
	}
	return artist, nil
}

func (r *ArtistRepository) Create(name string) (model.Artist, error) {
	result, err := r.db.Exec("INSERT INTO artists (name) VALUES (?)", name)
	if err != nil {
		return model.Artist{}, err
	}

	id, err := result.LastInsertId()
	if err != nil {
		return model.Artist{}, err
	}

	return model.Artist{
		ID:   int(id),
		Name: name,
	}, nil
}

func (r *ArtistRepository) GetAll() ([]model.Artist, error) {
	rows, err := r.db.Query("SELECT id, name FROM artists")
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	artists := []model.Artist{}
	for rows.Next() {
		var artist model.Artist
		if err := rows.Scan(&artist.ID, &artist.Name); err != nil {
			return nil, err
		}
		artists = append(artists, artist)
	}
	return artists, nil
}

func (r *ArtistRepository) GetSongIDsByArtist(artistID int) ([]int, error) {
	rows, err := r.db.Query("SELECT id FROM songs WHERE artist_id = ?", artistID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	ids := []int{}
	for rows.Next() {
		var id int
		if err := rows.Scan(&id); err != nil {
			return nil, err
		}
		ids = append(ids, id)
	}
	return ids, nil
}