/**
 * @vitest-environment jsdom
 */
import { describe, it, expect, vi, beforeEach } from 'vitest';
import {
  cn,
  str,
  num,
  arr,
  obj,
  date,
  storage,
  debounce,
  throttle,
} from '../src/utils/index';

describe('cn()', () => {
  it('concatena classes válidas', () => {
    expect(cn('foo', 'bar')).toBe('foo bar');
  });

  it('filtra falsy values', () => {
    expect(cn('foo', false, null, undefined, 'bar')).toBe('foo bar');
  });

  it('flatten nested arrays', () => {
    expect(cn('a', ['b', 'c'])).toBe('a b c');
  });

  it('normaliza espaços múltiplos', () => {
    expect(cn('a', '  b  ', 'c')).toBe('a b c');
  });
});

describe('str utils', () => {
  it('capitalize', () => {
    expect(str.capitalize('pULSE')).toBe('Pulse');
    expect(str.capitalize('')).toBe('');
  });

  it('truncate com sufixo', () => {
    expect(str.truncate('abcdef', 4, '…')).toBe('abcd…');
  });

  it('truncate retorna original se menor', () => {
    expect(str.truncate('ab', 10)).toBe('ab');
  });

  it('camelCase e kebabCase', () => {
    expect(str.camelCase('hello-world')).toBe('helloWorld');
    expect(str.kebabCase('helloWorld')).toBe('hello-world');
  });

  it('removeAccents', () => {
    expect(str.removeAccents('coração')).toBe('coracao');
  });

  it('maskEmail', () => {
    expect(str.maskEmail('john.doe@example.com')).toBe('j******e@example.com');
    expect(str.maskEmail('ab@x.com')).toBe('a*@x.com');
  });

  it('slugify', () => {
    expect(str.slugify('São Paulo → Cidade!')).toBe('s-o-paulo-cidade');
    expect(str.slugify('Hello World')).toBe('hello-world');
  });
});

describe('num utils', () => {
  it('clamp — limita intervalo', () => {
    expect(num.clamp(15, 0, 10)).toBe(10);
    expect(num.clamp(-5, 0, 10)).toBe(0);
    expect(num.clamp(5, 0, 10)).toBe(5);
  });

  it('rand — gera dentro do intervalo', () => {
    for (let i = 0; i < 10; i++) {
      const v = num.rand(1, 10);
      expect(v).toBeGreaterThanOrEqual(1);
      expect(v).toBeLessThanOrEqual(10);
      expect(Number.isInteger(v)).toBe(true);
    }
  });

  it('format — locale BR', () => {
    expect(num.format(1000)).toContain('1');
  });

  it('percent', () => {
    expect(num.percent(5, 0)).toBe(0);
    expect(num.percent(50, 100, 0)).toBe(50);
    expect(num.percent(1, 3, 0)).toBe(33);
  });
});

describe('arr utils', () => {
  it('unique', () => {
    expect(arr.unique([1, 2, 2, 3])).toEqual([1, 2, 3]);
  });

  it('unique com key', () => {
    const objs = [{ id: 1 }, { id: 2 }, { id: 1 }];
    expect(arr.unique(objs, 'id')).toHaveLength(2);
  });

  it('chunk', () => {
    expect(arr.chunk([1, 2, 3, 4, 5], 2)).toEqual([[1, 2], [3, 4], [5]]);
    expect(arr.chunk([1, 2, 3, 4], 2)).toEqual([[1, 2], [3, 4]]);
  });

  it('shuffle mantém elementos', () => {
    const original = [1, 2, 3, 4, 5];
    const shuffled = arr.shuffle(original);
    expect(shuffled.length).toBe(original.length);
    expect(shuffled.sort()).toEqual(original.sort());
  });
});

describe('obj utils', () => {
  it('pick', () => {
    expect(obj.pick({ a: 1, b: 2, c: 3 }, ['a'])).toEqual({ a: 1 });
  });

  it('omit', () => {
    expect(obj.omit({ a: 1, b: 2 }, ['b'])).toEqual({ a: 1 });
  });

  it('isEmpty', () => {
    expect(obj.isEmpty({})).toBe(true);
    expect(obj.isEmpty({ a: 1 })).toBe(false);
    expect(obj.isEmpty(null)).toBe(true);
    expect(obj.isEmpty(undefined)).toBe(true);
  });
});

describe('date utils', () => {
  it('format', () => {
    const d = new Date('2024-01-15T10:30:00');
    expect(date.format(d, 'YYYY-MM-DD')).toBe('2024-01-15');
    expect(date.format(d, 'HH:mm')).toBe('10:30');
  });

  it('now retorna string ISO', () => {
    const result = date.now();
    expect(typeof result).toBe('string');
    expect(new Date(result).toISOString()).toBe(result);
  });

  it('isToday', () => {
    expect(date.isToday(new Date())).toBe(true);
    expect(date.isToday(new Date('2000-01-01'))).toBe(false);
  });

  it('daysBetween', () => {
    const a = new Date('2024-01-01');
    const b = new Date('2024-01-10');
    expect(date.daysBetween(a, b)).toBe(9);
    expect(date.daysBetween(b, a)).toBe(-9);
  });
});

describe('storage', () => {
  beforeEach(() => {
    localStorage.clear();
  });

  it('get retorna fallback quando vazio', () => {
    expect(storage.get('key', 'default')).toBe('default');
  });

  it('set e get', () => {
    storage.set('key', { a: 1 });
    expect(storage.get('key', null)).toEqual({ a: 1 });
  });

  it('remove', () => {
    storage.set('key1', 1);
    storage.remove('key1');
    expect(storage.get('key1', 'x')).toBe('x');
  });

  it('clear', () => {
    storage.set('a', 1);
    storage.set('b', 2);
    storage.clear();
    expect(storage.get('a', null)).toBe(null);
  });

  it('clear com prefixo', () => {
    storage.set('app_a', 1);
    storage.set('app_b', 2);
    storage.set('other', 3);
    storage.clear('app_');
    expect(storage.get('app_a', null)).toBe(null);
    expect(storage.get('other', null)).toBe(3);
  });
});

describe('debounce', () => {
  it('atrasa execuçao — chama apenas ultima chamada', async () => {
    const fn = vi.fn();
    const debounced = debounce(fn, 50);
    debounced('a');
    debounced('b');
    expect(fn).not.toHaveBeenCalled();
    await new Promise(r => setTimeout(r, 100));
    expect(fn).toHaveBeenCalledTimes(1);
    expect(fn).toHaveBeenCalledWith('b');
  });
});

describe('throttle', () => {
  it('executa imediatamente na primeira chamada', () => {
    const fn = vi.fn();
    const throttled = throttle(fn, 50);
    throttled('a');
    expect(fn).toHaveBeenCalledWith('a');
    expect(fn).toHaveBeenCalledTimes(1);
  });
});