/**
 * sys schema 迁移执行器 —— drizzle-kit 生成 SQL,本文件应用(ADR-002:迁移随系统版本)。
 */
import { Pool } from 'pg';
import { drizzle } from 'drizzle-orm/node-postgres';
import { migrate } from 'drizzle-orm/node-postgres/migrator';
import { existsSync } from 'node:fs';
import { dirname, join, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';
import { loadConfig } from './config.ts';

/** 从本文件位置向上找 db/migrations —— 源码跑与 dist 跑同一套逻辑 */
function findMigrationsFolder(): string {
  let dir = dirname(fileURLToPath(import.meta.url));
  for (let i = 0; i < 8; i += 1) {
    const candidate = join(dir, 'db', 'migrations');
    if (existsSync(candidate)) return candidate;
    const parent = resolve(dir, '..');
    if (parent === dir) break;
    dir = parent;
  }
  throw new Error('找不到 db/migrations —— 先跑 pnpm db:generate');
}

export async function runMigrations(): Promise<void> {
  const config = loadConfig();
  const pool = new Pool({ connectionString: config.databaseUrl, max: 2 });
  try {
    const db = drizzle(pool);
    await migrate(db, { migrationsFolder: findMigrationsFolder(), migrationsSchema: 'sys' });
    process.stdout.write('sys schema 迁移完成\n');
  } finally {
    await pool.end();
  }
}

if (import.meta.url === `file://${process.argv[1]}`) {
  await runMigrations();
}