#!/usr/bin/env node
/**
 * 把一顆需求議題抽成下游要用的精簡 JSON。
 *
 * 這是下游（分析、實作）唯一的議題讀取管道，存在的理由是「不必吞下整份議題全文」。
 * 只讀 body，不把留言內容納入輸出；但會回報有幾則留言尚未被整併回描述，
 * 好讓下游知道自己是不是在拿過期的描述做事。
 *
 * 用法：
 *   node scripts/issue-extract.js --repo owner/name --index 7 [--host <網址>] [--dry-run]
 */
import {
  UNMERGED_COMMENT_NOTE,
  countUnmergedComments,
  fetchIssue,
  main,
  parseFlags,
  parseIndex,
  parseRepo,
  preflight,
  resolveLogin,
} from './lib.js';
import { listSection, parseSections, tableSection, textSection } from './issue-body.js';

main(async () => {
  const flags = parseFlags(process.argv.slice(2), {
    required: ['repo', 'index'],
    optional: ['host'],
    booleans: ['dry-run'],
  });
  const repo = parseRepo(flags.repo);
  const index = parseIndex(flags.index);
  const issuePath = `/repos/${repo}/issues/${index}`;
  const commentsPath = `${issuePath}/comments`;

  if (flags['dry-run']) {
    return {
      dryRun: true,
      repo,
      index,
      requests: [
        { method: 'GET', path: issuePath },
        { method: 'GET', path: commentsPath },
      ],
      note: UNMERGED_COMMENT_NOTE,
    };
  }

  const login = resolveLogin({ host: flags.host });
  const { user } = await preflight(login, repo);

  const issue = await fetchIssue(login, repo, index);
  const sections = parseSections(issue.body);

  return {
    index: issue.number,
    url: issue.html_url,
    title: issue.title,
    labels: (issue.labels ?? []).map((label) => label.name),
    總覽: textSection(sections, '總覽'),
    背景: textSection(sections, '背景'),
    目標: listSection(sections, '目標'),
    非目標: listSection(sections, '非目標'),
    名詞表: tableSection(sections, '領域名詞表'),
    流程圖: textSection(sections, '流程圖'),
    驗收標準: listSection(sections, '驗收標準'),
    影響範圍: listSection(sections, '影響範圍'),
    未決事項: listSection(sections, '未決事項'),
    未處理留言數: await countUnmergedComments(login, repo, index, user.login),
  };
});