import { describe, expect, it } from 'vitest';
import {
  PREFERENCES_KEY,
  cleanPreferences,
  defaultPreferences,
  moveId,
  parsePreferences,
  readPreferences,
  sortAppIds,
  writePreferences,
} from './preferences';

describe('preferences', () => {
  it('round-trips namespaced settings', () => {
    const preferences = {
      ...defaultPreferences,
      pinned: ['app.two'],
      order: ['app.two', 'app.one'],
      hidden: ['app.one'],
      theme: 'dark' as const,
    };
    writePreferences(preferences);
    expect(localStorage.getItem(PREFERENCES_KEY)).toContain('app.two');
    expect(readPreferences()).toEqual(preferences);
  });

  it('falls back safely for corrupt stored JSON', () => {
    localStorage.setItem(PREFERENCES_KEY, '{nope');
    expect(readPreferences()).toEqual(defaultPreferences);
  });

  it('validates imported JSON and removes duplicate ids', () => {
    expect(
      parsePreferences({
        version: 1,
        pinned: ['app.one', 'app.one'],
        order: [],
        hidden: [],
        theme: 'system',
      }).pinned
    ).toEqual(['app.one']);
    expect(() => parsePreferences({ version: 2 })).toThrow(/version/i);
    expect(() =>
      parsePreferences({
        version: 1,
        pinned: 'app.one',
        order: [],
        hidden: [],
        theme: 'system',
      })
    ).toThrow(/pinned/i);
  });

  it('cleans stale ids, pins first, and supports personal ordering', () => {
    const cleaned = cleanPreferences(
      {
        version: 1,
        pinned: ['app.three', 'missing'],
        hidden: ['missing'],
        order: ['app.two', 'missing'],
        theme: 'system',
      },
      ['app.one', 'app.two', 'app.three']
    );
    expect(cleaned.order).toEqual(['app.two', 'app.one', 'app.three']);
    expect(cleaned.hidden).toEqual([]);
    expect(sortAppIds(['app.one', 'app.two', 'app.three'], cleaned)).toEqual([
      'app.three',
      'app.two',
      'app.one',
    ]);
    expect(moveId(cleaned.order, 'app.one', -1)).toEqual([
      'app.one',
      'app.two',
      'app.three',
    ]);
  });
});