import type { QualityKey, Source } from './api.ts';

export const SOURCE_LABEL: Record<Source, string> = { netease: '网易云', qq: 'QQ 音乐' };

export const QUALITY_BADGE: Record<QualityKey, string> = {
  standard: '128K',
  high: '320K',
  lossless: 'FLAC',
  hires: 'HI-RES',
  master: 'MASTER',
  spatial: 'SPATIAL',
  effect: 'EFFECT',
};

export const QUALITY_LABEL: Record<QualityKey, string> = {
  standard: '标准',
  high: '极高',
  lossless: '无损',
  hires: 'Hi-Res',
  master: '超清母带',
  spatial: '空间音频',
  effect: '高清臻品',
};

const QUALITY_RANK: QualityKey[] = ['effect', 'spatial', 'master', 'hires', 'lossless', 'high', 'standard'];

export function isGold(q: string | null | undefined): boolean {
  return q === 'hires' || q === 'master' || q === 'spatial' || q === 'effect';
}

/** 该曲目声明的最佳音质（用于徽章） */
export function bestQuality(qs: QualityKey[] | undefined): QualityKey | undefined {
  if (!qs?.length) return undefined;
  return QUALITY_RANK.find((q) => qs.includes(q));
}

export function formatDuration(ms?: number | null): string {
  if (!ms) return '--:--';
  const s = Math.round(ms / 1000);
  return `${Math.floor(s / 60)}:${String(s % 60).padStart(2, '0')}`;
}

/** 总时长：1 小时 12 分 / 38 分钟 */
export function formatTotal(ms?: number | null): string {
  if (!ms) return '';
  const min = Math.round(ms / 60000);
  return min >= 60 ? `${Math.floor(min / 60)} 小时 ${min % 60} 分` : `${Math.max(1, min)} 分钟`;
}

export function formatSeconds(sec: number): string {
  if (!Number.isFinite(sec)) return '0:00';
  const s = Math.floor(sec);
  return `${Math.floor(s / 60)}:${String(s % 60).padStart(2, '0')}`;
}

export function formatSize(bytes?: number | null): string {
  if (!bytes) return '—';
  if (bytes >= 1073741824) return `${(bytes / 1073741824).toFixed(2)} GB`;
  if (bytes >= 1048576) return `${(bytes / 1048576).toFixed(1)} MB`;
  return `${Math.max(1, Math.round(bytes / 1024))} KB`;
}

export function formatSpeed(bps: number): string {
  return bps >= 1048576 ? `${(bps / 1048576).toFixed(1)} MB/s` : `${Math.round(bps / 1024)} KB/s`;
}

export function formatDate(ts?: number | string | null): string {
  if (!ts) return '';
  const d = new Date(ts);
  return Number.isNaN(d.getTime()) ? '' : `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`;
}

const dtf = new Intl.DateTimeFormat('zh-CN', { month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit' });
export function formatDateTime(ts: string): string {
  return dtf.format(new Date(ts));
}

export function coverThumb(url: string | undefined | null, size = 120): string | undefined {
  if (!url) return undefined;
  const https = url.replace(/^http:/, 'https:');
  if (/music\.126\.net/.test(https)) return `${https.split('?')[0]}?param=${size}y${size}`;
  if (/y\.gtimg\.cn\/music\/photo_new\/T00\dR\d+x\d+/.test(https)) {
    const s = size <= 150 ? 150 : size <= 300 ? 300 : 800;
    return https.replace(/R\d+x\d+/, `R${s}x${s}`);
  }
  return https;
}

export const STAGE_LABEL: Record<string, string> = {
  resolve: '解析音源',
  metadata: '获取信息',
  download: '下载中',
  lyric: '保存歌词',
  cover: '获取封面',
  tag: '写入标签',
};