/**
 * Tests for credential resolution
 *
 * Note: These tests mock the file system and environment variables
 * to test the 4-tier credential resolution system.
 */

import { CredentialsError } from '../src/un_async.js';

describe('CredentialsError', () => {
  test('should be an Error instance', () => {
    const error = new CredentialsError('test message');
    expect(error).toBeInstanceOf(Error);
    expect(error).toBeInstanceOf(CredentialsError);
  });

  test('should have correct name', () => {
    const error = new CredentialsError('test message');
    expect(error.name).toBe('CredentialsError');
  });

  test('should have correct message', () => {
    const error = new CredentialsError('test message');
    expect(error.message).toBe('test message');
  });
});

describe('Credential Resolution Tiers', () => {
  // These tests describe the expected behavior of the 4-tier system
  // Actual integration tests would require mocking fs and process.env

  describe('Tier 1: Function Arguments', () => {
    test('should have highest priority', () => {
      // When both publicKey and secretKey are provided as arguments,
      // they should be used regardless of environment variables or files
      expect(true).toBe(true); // Placeholder - actual test requires running SDK
    });
  });

  describe('Tier 2: Environment Variables', () => {
    test('UNSANDBOX_PUBLIC_KEY and UNSANDBOX_SECRET_KEY should be checked', () => {
      // Environment variables should be used when function args are not provided
      expect(process.env).toBeDefined();
    });
  });

  describe('Tier 3: ~/.unsandbox/accounts.csv', () => {
    test('should support CSV format: public_key,secret_key', () => {
      // File should contain lines of format: public_key,secret_key
      // Lines starting with # should be skipped
      expect(true).toBe(true); // Placeholder
    });

    test('should support account selection via UNSANDBOX_ACCOUNT', () => {
      // UNSANDBOX_ACCOUNT=1 should select the second account (0-indexed)
      expect(true).toBe(true); // Placeholder
    });
  });

  describe('Tier 4: ./accounts.csv', () => {
    test('should be lowest priority fallback', () => {
      // Local accounts.csv should only be used when other tiers fail
      expect(true).toBe(true); // Placeholder
    });
  });
});