// lib/index.mjs — fmode-mv 主入口
//
// 版本号三处必须一致：package.json / SKILL.md frontmatter / 本文件 VERSION。
// 用 `fmode-mv version --check` 可自动校验。

export const VERSION = '0.2.0';
export const NAME = 'fmode-mv';
export const SKILL = 'skill-mv';

import { existsSync, mkdirSync, readFileSync, writeFileSync } from 'node:fs';
import { dirname, join, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

export const ROOT = resolve(dirname(fileURLToPath(import.meta.url)), '..');

// 重新导出各模块，脚本统一从 index.mjs 取用
export * from './config.mjs';
export * from './api.mjs';
export * from './providers.mjs';
export * from './ffmpeg.mjs';
export * from './jimeng.mjs';
export * from './sharpness.mjs';
export * from './prompts.mjs';

// ==================== 工作区约定 ====================
//
// work/                      —— 本次生产的中间产物（不入库）
//   song.json                作曲填词结果
//   storyboard.json          分镜脚本
//   audio/                   音乐、人声、伴奏、配音
//   frames/                  关键帧图片
//   clips/                   生成的视频片段
//   lipsync/                 唇形驱动结果
//   subtitles.srt            字幕
// out/                       —— 最终成片

export const WORK = process.env.FMODE_MV_WORK ? resolve(process.env.FMODE_MV_WORK) : join(ROOT, 'work');
export const OUT = process.env.FMODE_MV_OUT ? resolve(process.env.FMODE_MV_OUT) : join(ROOT, 'out');

export const paths = {
  work: WORK,
  out: OUT,
  audio: join(WORK, 'audio'),
  frames: join(WORK, 'frames'),
  clips: join(WORK, 'clips'),
  lipsync: join(WORK, 'lipsync'),
  song: join(WORK, 'song.json'),
  storyboard: join(WORK, 'storyboard.json'),
  script: join(WORK, 'script.json'),
  subtitles: join(WORK, 'subtitles.srt'),
};

export function ensureWork() {
  for (const d of [paths.work, paths.out, paths.audio, paths.frames, paths.clips, paths.lipsync]) mkdirSync(d, { recursive: true });
  return paths.work;
}

// ==================== JSON 读写 ====================

export function writeJSON(file, data) {
  mkdirSync(dirname(file), { recursive: true });
  writeFileSync(file, JSON.stringify(data, null, 2) + '\n', 'utf8');
  return file;
}

export function readJSON(file, fallback = null) {
  try {
    if (!existsSync(file)) return fallback;
    return JSON.parse(readFileSync(file, 'utf8'));
  } catch (e) {
    throw new Error(`读取 JSON 失败 ${file}: ${e.message}`);
  }
}

// ==================== 日志 ====================

const C = {
  reset: '\x1b[0m',
  dim: '\x1b[2m',
  red: '\x1b[31m',
  green: '\x1b[32m',
  yellow: '\x1b[33m',
  blue: '\x1b[34m',
  cyan: '\x1b[36m',
  bold: '\x1b[1m',
};
const useColor = process.stdout.isTTY && !process.env.NO_COLOR;
const paint = (c, s) => (useColor ? `${c}${s}${C.reset}` : String(s));

export const log = {
  step: (s) => console.log(`\n${paint(C.bold + C.blue, '▶ ' + s)}`),
  ok: (s) => console.log(`  ${paint(C.green, '✓')} ${s}`),
  warn: (s) => console.log(`  ${paint(C.yellow, '!')} ${s}`),
  err: (s) => console.error(`  ${paint(C.red, '✗')} ${s}`),
  info: (s) => console.log(`  ${s}`),
  dim: (s) => console.log(paint(C.dim, `  ${s}`)),
  raw: (s) => console.log(s),
  key: (k, v) => console.log(`  ${paint(C.cyan, k.padEnd(14))} ${v}`),
};

/** 打印未开通通道的标准提示（统一格式，保证「不静默失败」） */
export function reportUnavailable(kind, err) {
  log.err(`通道「${kind}」不可用：${String(err.message).split('\n')[0]}`);
  if (err.hint) {
    console.log('');
    console.log(paint(C.yellow, '  可操作方案：'));
    for (const line of String(err.hint).split('\n')) console.log(`  ${line}`);
  }
  console.log('');
  console.log(paint(C.dim, `  用 \`fmode-mv providers\` 查看全部通道现状。`));
}

// ==================== 参数解析 ====================

/**
 * 极简参数解析：支持 --k v / --k=v / --flag / 位置参数。
 * @returns {{_:string[], flags:object}}
 */
export function parseArgs(argv = process.argv.slice(2)) {
  const _ = [];
  const flags = {};
  for (let i = 0; i < argv.length; i++) {
    const a = argv[i];
    if (a.startsWith('--')) {
      const eq = a.indexOf('=');
      if (eq > -1) {
        flags[a.slice(2, eq)] = a.slice(eq + 1);
      } else {
        const key = a.slice(2);
        const next = argv[i + 1];
        if (next === undefined || next.startsWith('--')) flags[key] = true;
        else {
          flags[key] = next;
          i++;
        }
      }
    } else if (a.startsWith('-') && a.length > 1) {
      flags[a.slice(1)] = true;
    } else {
      _.push(a);
    }
  }
  return { _, flags };
}

/** 三处版本一致性校验 */
export function checkVersionConsistency() {
  const issues = [];
  const pkgPath = join(ROOT, 'package.json');
  const skillPath = join(ROOT, 'SKILL.md');
  let pkgVer = null;
  let skillVer = null;
  try {
    pkgVer = JSON.parse(readFileSync(pkgPath, 'utf8')).version;
  } catch (e) {
    issues.push(`package.json 读取失败：${e.message}`);
  }
  try {
    const txt = readFileSync(skillPath, 'utf8');
    const m = txt.match(/^---([\s\S]*?)---/);
    const fm = m ? m[1] : '';
    skillVer = (fm.match(/^version:\s*"?([^"\n]+)"?/m) || [])[1]?.trim() || null;
  } catch (e) {
    issues.push(`SKILL.md 读取失败：${e.message}`);
  }
  const ok = pkgVer === VERSION && skillVer === VERSION;
  if (pkgVer !== VERSION) issues.push(`package.json=${pkgVer} ≠ index.mjs=${VERSION}`);
  if (skillVer !== VERSION) issues.push(`SKILL.md=${skillVer} ≠ index.mjs=${VERSION}`);
  return { ok, version: VERSION, pkgVersion: pkgVer, skillVersion: skillVer, issues };
}

export default { VERSION, NAME, SKILL, paths, checkVersionConsistency };