const { getDb } = require('../db/init');

const db = getDb('onion');
const CATEGORY_KEY = 'basic_info_role';

const FATHER_SYNONYMS = ['父', '爸', '父 亲', '孩子爸', '爸专', '爸备'];
const GRANDPA_SYNONYMS = ['姥爷', '外爷'];
const GRANDMA_SYNONYMS = ['姥姥', '姥姥/外婆'];
const GRANDSON_SYNONYMS = [];

function updateStats(dbConn) {
  const totalUsers = dbConn.prepare('SELECT COUNT(*) AS n FROM users').get().n || 1;
  const tags = dbConn.prepare('SELECT id FROM tags').all();
  const stmt = dbConn.prepare(`
    UPDATE tags
    SET
      coverage = (SELECT COUNT(DISTINCT user_id) FROM user_tags WHERE tag_id = tags.id),
      coverage_rate = ROUND((SELECT COUNT(DISTINCT user_id) FROM user_tags WHERE tag_id = tags.id) * 100.0 / ?, 2)
    WHERE id = ?
  `);
  for (const tag of tags) stmt.run(totalUsers, tag.id);
}

function main() {
  try {
    const category = db.prepare('SELECT id FROM tag_categories WHERE key = ?').get(CATEGORY_KEY);
    if (!category) throw new Error(`找不到分类: ${CATEGORY_KEY}`);
    const catId = category.id;

    const getTag = db.prepare('SELECT id, name FROM tags WHERE category_id = ? AND name = ?');
    const renameTag = db.prepare('UPDATE tags SET name = ? WHERE id = ?');
    const mergeRel = db.prepare(`
      INSERT OR IGNORE INTO user_tags (user_id, tag_id)
      SELECT user_id, ? FROM user_tags WHERE tag_id = ?
    `);
    const deleteRel = db.prepare('DELETE FROM user_tags WHERE tag_id = ?');
    const deleteTag = db.prepare('DELETE FROM tags WHERE id = ?');

    const tx = db.transaction(() => {
      // 1) 保证标准名存在：爸爸、外婆
      let dad = getTag.get(catId, '爸爸');
      const father = getTag.get(catId, '父亲');
      if (!dad && father) {
        renameTag.run('爸爸', father.id);
        dad = { id: father.id, name: '爸爸' };
        console.log('✅ 重命名: 父亲 -> 爸爸');
      }

      let grandma = getTag.get(catId, '外婆');
      const extGrandma = getTag.get(catId, '姥姥/外婆');
      if (!grandma && extGrandma) {
        renameTag.run('外婆', extGrandma.id);
        grandma = { id: extGrandma.id, name: '外婆' };
        console.log('✅ 重命名: 姥姥/外婆 -> 外婆');
      }

      // 2) 合并爸爸系
      dad = getTag.get(catId, '爸爸');
      if (dad) {
        for (const synonym of FATHER_SYNONYMS) {
          const tag = getTag.get(catId, synonym);
          if (!tag || tag.id === dad.id) continue;
          mergeRel.run(dad.id, tag.id);
          deleteRel.run(tag.id);
          deleteTag.run(tag.id);
          console.log(`✅ 合并: ${synonym} -> 爸爸`);
        }
      }

      // 3) 合并祖辈
      const grandpa = getTag.get(catId, '爷爷');
      if (grandpa) {
        for (const synonym of GRANDPA_SYNONYMS) {
          const tag = getTag.get(catId, synonym);
          if (!tag || tag.id === grandpa.id) continue;
          mergeRel.run(grandpa.id, tag.id);
          deleteRel.run(tag.id);
          deleteTag.run(tag.id);
          console.log(`✅ 合并: ${synonym} -> 爷爷`);
        }
      }

      const grandma2 = getTag.get(catId, '奶奶');
      if (grandma2) {
        const tag = getTag.get(catId, '婆婆');
        if (tag && tag.id !== grandma2.id) {
          mergeRel.run(grandma2.id, tag.id);
          deleteRel.run(tag.id);
          deleteTag.run(tag.id);
          console.log('✅ 合并: 婆婆 -> 奶奶');
        }
      }

      grandma = getTag.get(catId, '外婆');
      if (grandma) {
        for (const synonym of GRANDMA_SYNONYMS) {
          const tag = getTag.get(catId, synonym);
          if (!tag || tag.id === grandma.id) continue;
          mergeRel.run(grandma.id, tag.id);
          deleteRel.run(tag.id);
          deleteTag.run(tag.id);
          console.log(`✅ 合并: ${synonym} -> 外婆`);
        }
      }

      // 4) 外公系
      const grandpa2 = getTag.get(catId, '外公');
      if (grandpa2) {
        const tag = getTag.get(catId, '姥爷');
        if (tag && tag.id !== grandpa2.id) {
          mergeRel.run(grandpa2.id, tag.id);
          deleteRel.run(tag.id);
          deleteTag.run(tag.id);
          console.log('✅ 合并: 姥爷 -> 外公');
        }
      }
    });

    tx();
    updateStats(db);

    const stats = db.prepare(`
      SELECT
        (SELECT COUNT(*) FROM tags t JOIN tag_categories c ON c.id=t.category_id WHERE c.key = ?) AS tag_count,
        (SELECT COUNT(*) FROM user_tags) AS rel_count
    `).get(CATEGORY_KEY);

    console.log('\n✨ 标准名修复完成');
    console.log(`  • 家庭角色标签剩余: ${stats.tag_count}`);
    console.log(`  • 用户-标签关系总数: ${stats.rel_count}`);

    db.close();
  } catch (error) {
    console.error('❌ 标准名修复失败:', error);
    try { db.close(); } catch (_) {}
    process.exit(1);
  }
}

main();