/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import { describe, it, expect } from 'vitest';
import { parseAndFormatApiError } from './errorParsing.js';

describe('parseAndFormatApiError', () => {
  it('should format a valid API error JSON', () => {
    const errorMessage =
      'got status: 400 Bad Request. {"error":{"code":400,"message":"API key not valid. Please pass a valid API key.","status":"INVALID_ARGUMENT"}}';
    const expected =
      'API Error: API key not valid. Please pass a valid API key. (Status: INVALID_ARGUMENT)';
    expect(parseAndFormatApiError(errorMessage)).toBe(expected);
  });

  it('should return the original message if it is not a JSON error', () => {
    const errorMessage = 'This is a plain old error message';
    expect(parseAndFormatApiError(errorMessage)).toBe(errorMessage);
  });

  it('should return the original message for malformed JSON', () => {
    const errorMessage = '[Stream Error: {"error": "malformed}';
    expect(parseAndFormatApiError(errorMessage)).toBe(errorMessage);
  });

  it('should handle JSON that does not match the ApiError structure', () => {
    const errorMessage = '[Stream Error: {"not_an_error": "some other json"}]';
    expect(parseAndFormatApiError(errorMessage)).toBe(errorMessage);
  });

  it('should format a nested API error', () => {
    const nestedErrorMessage = JSON.stringify({
      error: {
        code: 429,
        message:
          "Gemini 2.5 Pro Preview doesn't have a free quota tier. For more information on this error, head to: https://ai.google.dev/gemini-api/docs/rate-limits.",
        status: 'RESOURCE_EXHAUSTED',
      },
    });

    const errorMessage = JSON.stringify({
      error: {
        code: 429,
        message: nestedErrorMessage,
        status: 'Too Many Requests',
      },
    });

    expect(parseAndFormatApiError(errorMessage)).toBe(
      "API Error: Gemini 2.5 Pro Preview doesn't have a free quota tier. For more information on this error, head to: https://ai.google.dev/gemini-api/docs/rate-limits. (Status: Too Many Requests)",
    );
  });
});
