/**
 * Database test helper - creates isolated database instances for testing
 */

import { database } from "../../src/storage/database.js";
import { join } from "path";
import { mkdirSync } from "fs";
import type { TestContext } from "./test-utils.js";

/**
 * Setup test database with isolated data directory
 */
export function setupTestDatabase(testContext: TestContext): () => void {
  const testDataDir = join(testContext.tempDir, "data");
  mkdirSync(testDataDir, { recursive: true });

  // Set environment variable for test data directory
  const originalDataDir = process.env.MCP_TEST_DATA_DIR;
  process.env.MCP_TEST_DATA_DIR = testDataDir;

  // Return cleanup function
  return () => {
    if (originalDataDir) {
      process.env.MCP_TEST_DATA_DIR = originalDataDir;
    } else {
      delete process.env.MCP_TEST_DATA_DIR;
    }
  };
}