# -*- coding: utf-8 -*-
"""命令行入口（python -m music_downloader）。"""

from __future__ import annotations

from .downloader import (
    MusicDownloader,
)
from .models import (
    DownloadException,
)

# ============ CLI 入口 ============

if __name__ == "__main__":
    import sys
    from dataclasses import asdict

    downloader = MusicDownloader()

    # 无参数：打印模块信息
    if len(sys.argv) < 2:
        print("网易云音乐下载器")
        print(f"ffmpeg 路径: {downloader.ffmpeg_path or '未找到'}")
        print("支持的音质: standard / exhigh / lossless / hires / sky / jyeffect / jymaster / dolby")
        print("支持的功能: 同步/批量下载、ffmpeg 元数据写入")
        print()
        print("用法:")
        print("  python music_downloader.py <music_id> [quality]            # 仅打印信息")
        print("  python music_downloader.py <music_id> [quality] --download # 打印并下载")
        print()
        print("示例:")
        print("  python music_downloader.py 123456")
        print("  python music_downloader.py 123456 lossless")
        print("  python music_downloader.py 123456 hires --download")
        sys.exit(0)

    # 解析参数
    try:
        music_id = int(sys.argv[1])
    except ValueError:
        print(f"错误: music_id 必须是整数，收到: {sys.argv[1]!r}")
        sys.exit(1)

    quality = sys.argv[2] if len(sys.argv) > 2 and not sys.argv[2].startswith("--") else "lossless"
    do_download = "--download" in sys.argv

    # 打印音乐信息
    try:
        info = downloader.get_music_info(music_id, quality)
    except DownloadException as e:
        print(f"获取音乐信息失败: {e}")
        sys.exit(1)

    print()
    print("=" * 70)
    print(f"音乐信息  (ID={info.id}, quality={info.quality})")
    print("=" * 70)

    info_dict = asdict(info)
    for key, value in info_dict.items():
        # 歌词太长，只显示行数
        if key in ("lyric", "tlyric"):
            lines = [ln for ln in (value or "").splitlines() if ln.strip()]
            preview = " | ".join(lines[:2])[:80] if lines else "(空)"
            print(f"  {key:<14}: {len(lines)} 行  预览: {preview}{'...' if len(lines) > 2 else ''}")
            continue
        # URL 类字段：完整展示（如果终端窄可换行）
        if key in ("download_url", "pic_url"):
            print(f"  {key:<14}: {value}")
            continue
        print(f"  {key:<14}: {value}")

    print("=" * 70)

    # 可选：触发下载
    if do_download:
        print()
        print("开始下载...")
        result = downloader.download_music_file(music_id, quality)
        if result.success:
            print(f"下载完成: {result.file_path}  ({result.file_size} 字节)")
        else:
            print(f"下载失败: {result.error_message}")
            sys.exit(1)