/**
 * @license
 * Copyright 2026 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import { describe, it, expect } from 'vitest';
import { deriveItemsFromLegacySettings } from './footerItems.js';
import { createMockSettings } from '../test-utils/settings.js';

describe('deriveItemsFromLegacySettings', () => {
  it('returns defaults when no legacy settings are customized', () => {
    const settings = createMockSettings({
      ui: { footer: { hideContextPercentage: true } },
    }).merged;
    const items = deriveItemsFromLegacySettings(settings);
    expect(items).toEqual([
      'cwd',
      'git-branch',
      'sandbox-status',
      'model-name',
      'quota',
    ]);
  });

  it('removes cwd when hideCWD is true', () => {
    const settings = createMockSettings({
      ui: { footer: { hideCWD: true, hideContextPercentage: true } },
    }).merged;
    const items = deriveItemsFromLegacySettings(settings);
    expect(items).not.toContain('cwd');
  });

  it('removes sandbox-status when hideSandboxStatus is true', () => {
    const settings = createMockSettings({
      ui: { footer: { hideSandboxStatus: true, hideContextPercentage: true } },
    }).merged;
    const items = deriveItemsFromLegacySettings(settings);
    expect(items).not.toContain('sandbox-status');
  });

  it('removes model-name, context-remaining, and quota when hideModelInfo is true', () => {
    const settings = createMockSettings({
      ui: { footer: { hideModelInfo: true, hideContextPercentage: true } },
    }).merged;
    const items = deriveItemsFromLegacySettings(settings);
    expect(items).not.toContain('model-name');
    expect(items).not.toContain('context-remaining');
    expect(items).not.toContain('quota');
  });

  it('includes context-remaining when hideContextPercentage is false', () => {
    const settings = createMockSettings({
      ui: { footer: { hideContextPercentage: false } },
    }).merged;
    const items = deriveItemsFromLegacySettings(settings);
    expect(items).toContain('context-remaining');
    // Should be after model-name
    const modelIdx = items.indexOf('model-name');
    const contextIdx = items.indexOf('context-remaining');
    expect(contextIdx).toBe(modelIdx + 1);
  });

  it('includes memory-usage when showMemoryUsage is true', () => {
    const settings = createMockSettings({
      ui: { showMemoryUsage: true, footer: { hideContextPercentage: true } },
    }).merged;
    const items = deriveItemsFromLegacySettings(settings);
    expect(items).toContain('memory-usage');
  });

  it('handles combination of settings', () => {
    const settings = createMockSettings({
      ui: {
        showMemoryUsage: true,
        footer: {
          hideCWD: true,
          hideModelInfo: true,
          hideContextPercentage: false,
        },
      },
    }).merged;
    const items = deriveItemsFromLegacySettings(settings);
    expect(items).toEqual([
      'git-branch',
      'sandbox-status',
      'context-remaining',
      'memory-usage',
    ]);
  });
});