import { beforeEach, describe, expect, it, vi } from 'vitest';
import {
  getRememberedAccounts,
  rememberLoginAccount,
  removeRememberedAccount,
} from '@/utils/storage';

let storage: Map<string, unknown>;

beforeEach(() => {
  storage = new Map<string, unknown>();
  vi.stubGlobal('uni', {
    getStorageSync: (key: string) => storage.get(key) ?? '',
    setStorageSync: (key: string, value: unknown) => storage.set(key, value),
    removeStorageSync: (key: string) => storage.delete(key),
  });
});

describe('remembered login accounts', () => {
  it('migrates the legacy single-account value', () => {
    storage.set('aidop_login_account', 'UATAdminA');

    expect(getRememberedAccounts()).toEqual(['UATAdminA']);
    expect(JSON.parse(String(storage.get('aidop_login_accounts')))).toEqual(['UATAdminA']);
  });

  it('keeps the most recently used account first and removes duplicates case-insensitively', () => {
    rememberLoginAccount('UATAdminA');
    rememberLoginAccount('AIDOPDemoTenant');
    rememberLoginAccount('uatadmina');

    expect(getRememberedAccounts()).toEqual(['uatadmina', 'AIDOPDemoTenant']);
  });

  it('limits history to eight accounts', () => {
    for (let index = 1; index <= 10; index += 1) {
      rememberLoginAccount(`user${index}`);
    }

    expect(getRememberedAccounts()).toEqual([
      'user10',
      'user9',
      'user8',
      'user7',
      'user6',
      'user5',
      'user4',
      'user3',
    ]);
  });

  it('removes one account without clearing the remaining history', () => {
    rememberLoginAccount('first');
    rememberLoginAccount('second');

    expect(removeRememberedAccount('SECOND')).toEqual(['first']);
    expect(storage.get('aidop_login_account')).toBe('first');
  });
});