import { describe, expect, it } from 'vitest';

import { appendErrorDetailToFailureText } from './message-turn-controller.js';

const BASE = '요청을 완료하지 못했습니다. 다시 시도해 주세요.';

describe('appendErrorDetailToFailureText', () => {
  it('returns the base text unchanged when there is no detail', () => {
    expect(appendErrorDetailToFailureText(BASE, null)).toBe(BASE);
    expect(appendErrorDetailToFailureText(BASE, undefined)).toBe(BASE);
    expect(appendErrorDetailToFailureText(BASE, '   ')).toBe(BASE);
  });

  it('appends the error reason so the user sees what went wrong', () => {
    const out = appendErrorDetailToFailureText(
      BASE,
      'API Error: 529 Overloaded. This is a server-side issue.',
    );
    expect(out.startsWith(BASE)).toBe(true);
    expect(out).toContain('오류 내용:');
    expect(out).toContain('API Error: 529 Overloaded');
  });

  it('collapses whitespace and caps very long detail', () => {
    const long = 'API Error: ' + 'x'.repeat(500);
    const out = appendErrorDetailToFailureText(BASE, long);
    expect(out).toContain('…');
    // base + "\n\n오류 내용: " + 300 chars + "…"
    expect(out.length).toBeLessThan(BASE.length + 340);
    expect(appendErrorDetailToFailureText(BASE, 'a\n\n  b\t c')).toContain(
      '오류 내용: a b c',
    );
  });

  it('redacts secrets embedded in the error detail', () => {
    const out = appendErrorDetailToFailureText(
      BASE,
      'auth failed with key sk-ant-api03-ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789',
    );
    expect(out).not.toContain('sk-ant-api03-ABCDEFGHIJKLMNOPQRSTUVWXYZ');
    expect(out).toContain('[REDACTED]');
  });
});