// File: backend/internal/database/modpack_repository.go
package database

import (
	"context"

	"gitea.mrixs.me/minecraft-platform/backend/internal/models"
	"github.com/jackc/pgx/v5"
	"github.com/jackc/pgx/v5/pgxpool"
)

type ModpackRepository struct {
	DB *pgxpool.Pool // <--- ИЗМЕНЕНИЕ
}

// CreateModpackTx создает модпак и все его файлы в одной транзакции.
func (r *ModpackRepository) CreateModpackTx(ctx context.Context, modpack *models.Modpack, files []models.ModpackFile) error {
	tx, err := r.DB.Begin(ctx)
	if err != nil {
		return err
	}
	defer tx.Rollback(ctx)

	var modpackID int
	err = tx.QueryRow(ctx,
		"INSERT INTO modpacks (name, display_name, minecraft_version) VALUES ($1, $2, $3) RETURNING id",
		modpack.Name, modpack.DisplayName, modpack.MinecraftVersion,
	).Scan(&modpackID)
	if err != nil {
		return err
	}

	rows := make([][]interface{}, len(files))
	for i, f := range files {
		rows[i] = []interface{}{modpackID, f.RelativePath, f.FileHash, f.FileSize, f.DownloadURL}
	}

	_, err = tx.CopyFrom(
		ctx,
		pgx.Identifier{"modpack_files"},
		[]string{"modpack_id", "relative_path", "file_hash", "file_size", "download_url"},
		pgx.CopyFromRows(rows),
	)
	if err != nil {
		return err
	}

	return tx.Commit(ctx)
}