#!/usr/bin/env node
import fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const ROOT = path.join(__dirname, '..');
const TASKS_FILE = path.join(ROOT, 'data', 'tasks.json');
const REPORT_DIR = path.join(ROOT, 'reports');

function parseArgs(argv) {
  const args = { limit: 30 };
  for (let i = 0; i < argv.length; i++) {
    const a = argv[i];
    if (a === '--task' || a === '--task-id') args.taskId = argv[++i];
    else if (a === '--limit') args.limit = Number(argv[++i] || 30);
    else if (a === '--out') args.out = argv[++i];
  }
  return args;
}

function priceNumber(value) {
  const m = String(value || '').replace(/,/g, '').match(/\d+(?:\.\d+)?/);
  return m ? Number(m[0]) : null;
}

function riskFlags(item, task) {
  const text = `${item.title || ''} ${item.description || ''}`.toLowerCase();
  const flags = [];
  const badWords = ['维修', '求购', '租', '回收', '展示机', '资源机', '监管机', '扩容', '改装', '仅拆封包装'];
  for (const w of badWords) if (text.includes(w)) flags.push(`疑似${w}`);
  if (/配件|零件|外壳|保护壳|贴膜/.test(text) && !/配件齐|原装配件|全套配件/.test(text)) flags.push('疑似配件/零件');
  if (!item.description) flags.push('详情描述为空');
  if (item.wantCount && /\d/.test(item.wantCount)) flags.push(`热度: ${item.wantCount}`);
  const p = priceNumber(item.detailPrice || item.price);
  if (task.config?.priceMax && p && p > task.config.priceMax) flags.push(`超预算(${p} > ${task.config.priceMax})`);
  if (item.sellerRating) flags.push(item.sellerRating);
  if (item.localCoarseReason) flags.push(`粗筛: ${item.localCoarseReason}`);
  if (item.localFineReason) flags.push(`细筛: ${item.localFineReason}`);
  return [...new Set(flags)].slice(0, 8);
}

function scoreItem(item, task) {
  let score = 60;
  const flags = riskFlags(item, task);
  score -= flags.filter(f => /疑似|为空|超预算/.test(f)).length * 15;
  if (item.description && item.description.length > 30) score += 8;
  if (item.sellerRating && /好评/.test(item.sellerRating)) score += 5;
  if (item.images?.length) score += Math.min(item.images.length, 5);
  return Math.max(0, Math.min(100, score));
}

function renderTask(task, limit) {
  const items = [...(task.products?.fineFiltered || [])]
    .map(item => ({ item, score: scoreItem(item, task), flags: riskFlags(item, task) }))
    .sort((a, b) => b.score - a.score)
    .slice(0, limit);

  const lines = [];
  lines.push(`# ${task.name || task.id} — Hermes 候选分析报告`);
  lines.push('');
  lines.push(`- 任务ID：\`${task.id}\``);
  lines.push(`- 阶段：${task.stage}`);
  lines.push(`- 关键词：${(task.config?.queries || []).join('、') || '-'}`);
  lines.push(`- 需求：${task.config?.customRequirements || '-'}`);
  lines.push(`- 数量：采集 ${task.products?.raw?.length || 0} / 粗筛 ${task.products?.coarseFiltered?.length || 0} / 候选 ${task.products?.fineFiltered?.length || 0}`);
  lines.push('');

  if (items.length === 0) {
    lines.push('暂无可分析候选。');
    return lines.join('\n');
  }

  lines.push('## 优先查看');
  lines.push('');
  for (const { item, score, flags } of items) {
    const price = item.detailPrice || item.price || '-';
    const loc = item.sellerLocation || '-';
    const href = item.href || item.url || '';
    lines.push(`### ${score}分｜${item.title || '(无标题)'}`);
    lines.push(`- 价格：${price}`);
    lines.push(`- 地区/卖家：${loc}${item.sellerName ? ` / ${item.sellerName}` : ''}`);
    if (href) lines.push(`- 链接：${href}`);
    if (item.description) lines.push(`- 描述：${String(item.description).replace(/\s+/g, ' ').slice(0, 220)}`);
    if (flags.length) lines.push(`- 风险/备注：${flags.join('；')}`);
    lines.push('- 建议：人工打开链接核对成色、拆修、序列号/保修、配件与交易方式；当前工具不会自动联系卖家。');
    lines.push('');
  }
  return lines.join('\n');
}

const args = parseArgs(process.argv.slice(2));
if (!fs.existsSync(TASKS_FILE)) {
  console.error(`未找到 ${TASKS_FILE}`);
  process.exit(1);
}
const tasks = JSON.parse(fs.readFileSync(TASKS_FILE, 'utf-8'));
const task = args.taskId ? tasks.find(t => t.id === args.taskId) : tasks[tasks.length - 1];
if (!task) {
  console.error(`未找到任务: ${args.taskId || '(latest)'}`);
  process.exit(1);
}
const report = renderTask(task, args.limit);
fs.mkdirSync(REPORT_DIR, { recursive: true });
const out = args.out || path.join(REPORT_DIR, `${task.id}-hermes-report.md`);
fs.writeFileSync(out, report, 'utf-8');
console.log(out);