/**
 * iBoard 基础数据初始化脚本
 * 用法: npm run db:seed
 * 幂等: 主键/唯一键冲突跳过, Strategy/Indicator 按 name 存在则更新
 */

require('dotenv').config();
const crypto = require('crypto');
const mysql = require('mysql2/promise');

function hashPassword(plain) {
  const salt = crypto.randomBytes(16).toString('hex');
  const hash = crypto.scryptSync(plain, salt, 64).toString('hex');
  return 'scrypt$' + salt + '$' + hash;
}

function parseUrl(url) {
  const u = new URL(url);
  return {
    host: u.hostname,
    port: Number(u.port) || 3306,
    user: decodeURIComponent(u.username),
    password: decodeURIComponent(u.password),
    database: u.pathname.replace(/^\//, ''),
  };
}

async function insertIgnore(conn, sql, params) {
  try {
    const [r] = await conn.execute(sql, params);
    return r.affectedRows;
  } catch (e) {
    if (e.code === 'ER_DUP_ENTRY') return 0;
    throw e;
  }
}

async function upsertByName(conn, table, payload, keyField) {
  const fields = Object.keys(payload);
  const placeholders = fields.map(() => '?').join(', ');
  const updateClause = fields
    .filter((f) => f !== keyField)
    .map((f) => '`' + f + '` = VALUES(`' + f + '`)')
    .join(', ');
  const sql = 'INSERT INTO `' + table + '` (' + fields.map((f) => '`' + f + '`').join(', ') + ') VALUES (' + placeholders + ') ON DUPLICATE KEY UPDATE ' + updateClause;
  const params = fields.map((f) => payload[f]);
  const [r] = await conn.execute(sql, params);
  return r.affectedRows;
}

async function main() {
  const cfg = parseUrl(process.env.DATABASE_URL);
  if (!cfg.host) throw new Error('DATABASE_URL 未配置或解析失败');
  const conn = await mysql.createConnection(cfg);
  console.log('已连接:', cfg.host + ':' + cfg.port + '/' + cfg.database);

  const adminPwd = hashPassword('admin123');
  const n1 = await insertIgnore(
    conn,
    'INSERT INTO `User` (name, email, password, createdAt, updatedAt) VALUES (?, ?, ?, NOW(3), NOW(3))',
    ['Admin', 'admin@iboard.local', adminPwd],
  );
  console.log('[User]        新增管理员: ' + n1 + ' 行 (admin@iboard.local / admin123)');

  const strategies = [
    { name: 'us-debt-gdp', description: '美国政府债务/GDP分析',
      data: { source: 'strategy.js', unit: '万亿美元', rows: [
        { year: '2019', debt: 22.7, gdp: 21.4, debtToGdp: 106.1, interestToGdp: 1.8 },
        { year: '2020', debt: 26.9, gdp: 20.9, debtToGdp: 128.7, interestToGdp: 1.6 },
        { year: '2021', debt: 28.4, gdp: 23.0, debtToGdp: 123.5, interestToGdp: 1.5 },
        { year: '2022', debt: 30.9, gdp: 25.4, debtToGdp: 121.6, interestToGdp: 1.6 },
        { year: '2023', debt: 33.1, gdp: 26.9, debtToGdp: 123.0, interestToGdp: 1.9 },
        { year: '2024', debt: 35.3, gdp: 28.5, debtToGdp: 123.9, interestToGdp: 2.1 },
      ]},
    },
    { name: 'china-debt-gdp', description: '中国政府债务/GDP分析',
      data: { source: 'strategy.js', unit: '万亿美元', rows: [
        { year: '2019', debt: 8.8, gdp: 14.3, debtToGdp: 61.5, interestToGdp: 1.9 },
        { year: '2020', debt: 10.3, gdp: 14.7, debtToGdp: 70.1, interestToGdp: 1.8 },
        { year: '2021', debt: 11.7, gdp: 16.1, debtToGdp: 72.7, interestToGdp: 1.7 },
        { year: '2022', debt: 13.1, gdp: 17.9, debtToGdp: 73.2, interestToGdp: 1.6 },
        { year: '2023', debt: 14.5, gdp: 19.4, debtToGdp: 74.7, interestToGdp: 1.6 },
        { year: '2024', debt: 15.9, gdp: 21.0, debtToGdp: 75.7, interestToGdp: 1.5 },
      ]},
    },
  ];
  let n2 = 0;
  for (const s of strategies) {
    n2 += await upsertByName(conn, 'Strategy',
      { name: s.name, description: s.description, data: JSON.stringify(s.data), updatedAt: new Date() },
      'name');
  }
  console.log('[Strategy]    upsert 策略: ' + n2 + ' 行 (1=新增, 2=更新)');

  const indicators = [
    { name: 'china-bond-1y', groupName: 'china-bond',
      data: { unit: '%', title: '中国国债1年', rows: [
        { month: '2024-01', value: 1.85 }, { month: '2024-02', value: 1.82 },
        { month: '2024-03', value: 1.78 }, { month: '2024-04', value: 1.75 },
        { month: '2024-05', value: 1.72 }, { month: '2024-06', value: 1.68 },
      ]}},
    { name: 'china-bond-10y', groupName: 'china-bond',
      data: { unit: '%', title: '中国国债10年', rows: [
        { month: '2024-01', value: 2.65 }, { month: '2024-02', value: 2.62 },
        { month: '2024-03', value: 2.58 }, { month: '2024-04', value: 2.55 },
        { month: '2024-05', value: 2.52 }, { month: '2024-06', value: 2.48 },
      ]}},
    { name: 'us-bond-1y', groupName: 'us-bond',
      data: { unit: '%', title: '美国国债1年', rows: [
        { month: '2024-01', value: 4.85 }, { month: '2024-02', value: 4.82 },
        { month: '2024-03', value: 4.78 }, { month: '2024-04', value: 4.65 },
        { month: '2024-05', value: 4.55 }, { month: '2024-06', value: 4.45 },
      ]}},
    { name: 'china-lpr-1y', groupName: 'china-lpr',
      data: { unit: '%', title: '中国LPR 1年期', rows: [
        { month: '2024-01', value: 3.45 }, { month: '2024-02', value: 3.45 },
        { month: '2024-03', value: 3.45 }, { month: '2024-04', value: 3.40 },
        { month: '2024-05', value: 3.40 }, { month: '2024-06', value: 3.40 },
      ]}},
  ];
  let n3 = 0;
  for (const i of indicators) {
    n3 += await upsertByName(conn, 'Indicator',
      { name: i.name, groupName: i.groupName, data: JSON.stringify(i.data), updatedAt: new Date() },
      'name');
  }
  console.log('[Indicator]   upsert 指标: ' + n3 + ' 行 (1=新增, 2=更新)');

  const article = {
    title: '欢迎使用 iBoard',
    slug: 'welcome-to-iboard',
    content: 'iBoard 用于收集和整理经济数据，以策略为主体重新组织。\n\n本文为示例条目，正式文章仍由 content/articles/*.md 文件承载。',
    date: '2026-08-03',
  };
  const n4 = await insertIgnore(
    conn,
    'INSERT INTO `Article` (title, slug, content, date, createdAt, updatedAt) VALUES (?, ?, ?, ?, NOW(3), NOW(3))',
    [article.title, article.slug, article.content, article.date],
  );
  console.log('[Article]     新增示例文章: ' + n4 + ' 行');

  const sowRows = [
    { month: '2024-01', inventory: 4067 },
    { month: '2024-02', inventory: 4042 },
    { month: '2024-03', inventory: 3992 },
    { month: '2024-04', inventory: 3986 },
    { month: '2024-05', inventory: 3996 },
    { month: '2024-06', inventory: 4038 },
  ];
  let n5 = 0;
  for (const r of sowRows) {
    n5 += await insertIgnore(
      conn,
      'INSERT INTO `Econ_SowInventory` (month, inventory, createdAt, updatedAt) VALUES (?, ?, NOW(3), NOW(3))',
      [r.month, r.inventory],
    );
  }
  console.log('[Econ_SowInventory] 新增: ' + n5 + ' 行');

  await conn.end();
  console.log('\nSeed 完成.');
}

main().catch((e) => { console.error('Seed 失败:', e); process.exit(1); });