import type { ExactSongChart } from '$lib/engine/index.ts';

const chartSources = import.meta.glob('../static/data/charts/*.json', {
  eager: true,
  query: '?raw',
  import: 'default'
}) as Record<string, string>;

const sourceByFilename = new Map(
  Object.entries(chartSources).map(([path, source]) => [path.split('/').at(-1) ?? path, source])
);
const parsedCharts = new Map<string, ExactSongChart>();

export async function loadExactSongChart(path: string): Promise<ExactSongChart> {
  const filename = path.split('/').at(-1) ?? path;
  const cached = parsedCharts.get(filename);
  if (cached) return cached;

  const source = sourceByFilename.get(filename);
  if (!source) throw new Error(`포함된 채보 데이터를 찾지 못했습니다: ${filename}`);
  const chart = JSON.parse(source) as ExactSongChart;
  parsedCharts.set(filename, chart);
  return chart;
}