'use strict';

const { MODULE_REGISTRY, validateRegistry } = require('@profile/shared');
const db = require('../infra/db');
const audit = require('../audit/audit');

/**
 * 启动一致性校验（migration-plan §5.4）。
 * 在 app.listen 前调用一次。
 */
async function syncModulesOnBoot() {
  const errors = validateRegistry();
  if (errors.length > 0) {
    throw new Error(`MODULE_REGISTRY invalid:\n${errors.join('\n')}`);
  }

  const dbRows = await db.query('SELECT `key`, status FROM modules');
  const dbKeys = new Set(dbRows.map((r) => r.key));
  const codeKeys = new Set(MODULE_REGISTRY.map((m) => m.key));

  // code 有但 DB 无 → 自动 INSERT
  for (const m of MODULE_REGISTRY) {
    if (!dbKeys.has(m.key)) {
      await db.execute('INSERT INTO modules (`key`, status, notes) VALUES (?, ?, ?)', [m.key, 'active', m.label]);
      console.log(`[modules] auto-registered: ${m.key}`);
      await audit.log({ clientType: 'system', action: 'module_auto_register', module: m.key });
    }
  }

  // DB 有但 code 无 → orphan 告警 + 审计，不阻塞
  const orphans = dbRows.filter((r) => !codeKeys.has(r.key)).map((r) => r.key);
  if (orphans.length > 0) {
    console.warn(`[modules] orphan in DB: ${orphans.join(',')}`);
    await audit.log({ clientType: 'system', action: 'module_orphan_detected', payload: { orphans } });
  }
}

/**
 * 合并 code descriptor + DB status/override，过滤 disabled 与无 READ 权限的模块。
 * @param {Record<string, number>} perms module -> 位掩码
 * @returns {Promise<Object[]>}
 */
async function getVisible(perms) {
  const dbRows = await db.query('SELECT `key`, status, override FROM modules');
  const statusMap = new Map(dbRows.map((r) => [r.key, r]));

  return MODULE_REGISTRY.filter((m) => {
    const row = statusMap.get(m.key);
    if (row && row.status === 'disabled') return false;
    return ((perms[m.rbacModule] || 0) & 1) === 1; // READ
  }).map((m) => {
    const row = statusMap.get(m.key);
    let override = {};
    if (row && row.override) {
      override = typeof row.override === 'string' ? JSON.parse(row.override) : row.override;
    }
    return { ...m, ...override };
  });
}

module.exports = { syncModulesOnBoot, getVisible };