import type { LoopMode, Track } from "../types.js";

export function formatDuration(seconds: number): string {
  if (!Number.isFinite(seconds) || seconds <= 0) return "LIVE";
  const total = Math.floor(seconds);
  const hours = Math.floor(total / 3600);
  const minutes = Math.floor((total % 3600) / 60);
  const secs = total % 60;
  const pad = (value: number) => value.toString().padStart(2, "0");
  return hours > 0 ? `${hours}:${pad(minutes)}:${pad(secs)}` : `${minutes}:${pad(secs)}`;
}

export function parseTimecode(input: string): number | null {
  const trimmed = input.trim();
  if (/^\d+$/.test(trimmed)) return Number.parseInt(trimmed, 10);
  const match = /^(?:(\d+):)?(\d{1,2}):(\d{1,2})$/.exec(trimmed);
  if (!match) return null;
  const [, hours, minutes, seconds] = match;
  return (
    Number.parseInt(hours ?? "0", 10) * 3600 +
    Number.parseInt(minutes ?? "0", 10) * 60 +
    Number.parseInt(seconds ?? "0", 10)
  );
}

export function progressBar(position: number, duration: number, width = 22): string {
  if (duration <= 0) return "🔴 прямой эфир";
  const ratio = Math.min(1, Math.max(0, position / duration));
  const filled = Math.round(ratio * (width - 1));
  const bar = `${"─".repeat(filled)}⬤${"─".repeat(Math.max(0, width - 1 - filled))}`;
  return `\`${formatDuration(position)}\` ${bar} \`${formatDuration(duration)}\``;
}

const SOURCE_LABEL: Record<Track["source"], string> = {
  youtube: "YouTube",
  soundcloud: "SoundCloud",
  direct: "Ссылка",
  local: "Медиатека",
};

export function trackLine(track: Track, index?: number): string {
  const prefix = index === undefined ? "" : `**${index}.** `;
  const author = track.author ? ` — ${track.author}` : "";
  const link = /^https?:/i.test(track.url) ? `[${track.title}](${track.url})` : track.title;
  return `${prefix}${link}${author} \`[${formatDuration(track.duration)}]\` · ${SOURCE_LABEL[track.source]} · <@${track.requestedBy.id}>`;
}

export function loopLabel(mode: LoopMode): string {
  if (mode === "track") return "трек";
  if (mode === "queue") return "очередь";
  return "выключен";
}