/**
 * @pulse-libs/core — Hooks Tests (clean suite)
 * @vitest-environment jsdom */
import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { renderHook, act, waitFor } from '@testing-library/react';
import {
  useToggle, useAsync, useDebounce, useLocalStorage,
  useMedia, useInterval, useClipboard, useFetch,
} from '../src/hooks/index';

const originalFetch = global.fetch;

// ─ mocks globais ───────────────────────────────────────────────────
const lsStore: Record<string,string> = {};
Object.defineProperty(global, 'localStorage', {
  value: {
    getItem: k => lsStore[k] ?? null,
    setItem: (k,v) => { lsStore[k] = v; },
    removeItem: k => { delete lsStore[k]; },
    clear: () => { Object.keys(lsStore).forEach(k => delete lsStore[k]); },
  },
  writable: true,
});
Object.defineProperty(global.navigator, 'clipboard', {
  value: { writeText: vi.fn().mockResolvedValue(undefined) },
  configurable: true, writable: true,
});
Object.defineProperty(global, 'matchMedia', {
  value: vi.fn().mockReturnValue({
    matches: false, media: '',
    addEventListener: vi.fn(), removeEventListener: vi.fn(),
    addListener: vi.fn(), removeListener: vi.fn(),
  }),
  configurable: true,
});

beforeEach(() => { lsStore[''] = ''; Object.keys(lsStore).forEach(k => delete lsStore[k]); });

// ════════════════════════════════════════════
describe('useToggle', () => {
  it('inicia false por default', () => {
    const { result } = renderHook(() => useToggle());
    expect(result.current[0]).toBe(false);
  });
  it('inicia true se passado', () => {
    const { result } = renderHook(() => useToggle(true));
    expect(result.current[0]).toBe(true);
  });
  it('alterna com toggle()', () => {
    const { result } = renderHook(() => useToggle(false));
    act(() => result.current[1]());
    expect(result.current[0]).toBe(true);
    act(() => result.current[1]());
    expect(result.current[0]).toBe(false);
  });
  it('força valor com set()', () => {
    const { result } = renderHook(() => useToggle(false));
    act(() => result.current[2](true));
    expect(result.current[0]).toBe(true);
  });
});

// ════════════════════════════════════════════
describe('useAsync', () => {
  afterEach(() => { global.fetch = originalFetch; });

  it('começa em idling e depois transiciona', async () => {
    const fn = vi.fn(async () => Promise.resolve('ok'));
    const { result } = renderHook(() => useAsync(fn, []));

    // Imediatamente após renderHook: efeitos ainda não rodaram (microtask)
    // Espera um ciclo de event loop
    await waitFor(() => {
      expect(['idle','loading','success','error']).toContain(result.current.status);
    });
    // Com sucesso, deve estar em success
    await waitFor(() => expect(result.current.status).toBe('success'), { timeout: 3000 });
    if ('data' in result.current) expect(result.current.data).toBe('ok');
  });

  it('vai para error se promise rejeita', async () => {
    const { result } = renderHook(() => useAsync(async () => { throw new Error('x'); }, []));

    await waitFor(() => expect(result.current.status).toBe('error'), { timeout: 3000 });
    if ('error' in result.current) expect(result.current.error).toBeTruthy();
  });

  it('re-executa só quando deps mudam', async () => {
    const fn = vi.fn(async () => 'v');
    const { rerender } = renderHook(
      ({ d }) => useAsync(fn, d),
      { initialProps: { d: ['a'] as string[] } }
    );
    await waitFor(() => expect(fn).toHaveBeenCalledTimes(1), { timeout: 3000 });
    rerender({ d: ['b'] as string[] });
    await waitFor(() => expect(fn).toHaveBeenCalledTimes(2), { timeout: 3000 });
  });
});

// ════════════════════════════════════════════
describe('useDebounce', () => {
  it('retorna valor inicial', () => {
    const { result } = renderHook(() => useDebounce('x', 200));
    expect(result.current).toBe('x');
  });

  it('atrasa atualização até o timer', async () => {
    const { result, rerender } = renderHook(
      ({ v }) => useDebounce(v, 200),
      { initialProps: { v: 'a' } }
    );
    rerender({ v: 'b' });
    expect(result.current).toBe('a');
    await act(async () => { await new Promise(r => setTimeout(r, 300)); });
    expect(result.current).toBe('b');
  });

  it('flushes última mudança em rápidas trocas', async () => {
    const { result, rerender } = renderHook(
      ({ v }) => useDebounce(v, 200),
      { initialProps: { v: 1 } }
    );
    rerender({ v: 2 }); rerender({ v: 3 }); rerender({ v: 4 });
    await act(async () => { await new Promise(r => setTimeout(r, 300)); });
    expect(result.current).toBe(4);
  });
});

// ════════════════════════════════════════════
describe('useLocalStorage', () => {
  it('retorna tupla [valor, setter] corretamente', () => {
    const { result } = renderHook(() =>
      useLocalStorage('k1', 'hello' as string) as any
    );
    expect(Array.isArray(result.current)).toBe(true);
    expect(result.current[0]).toBe('hello');
    expect(typeof result.current[1]).toBe('function');
  });

  it('salva e lê valor', () => {
    const { result } = renderHook(() =>
      useLocalStorage('k2', 'init' as string) as any
    );
    act(() => result.current[1]('novo'));
    expect(result.current[0]).toBe('novo');
  });

  it('persiste em sessões', () => {
    lsStore['k3'] = '"saved"';
    const { result } = renderHook(() =>
      useLocalStorage('k3', 'def' as string) as any
    );
    expect(result.current[0]).toBe('saved');
  });

  it('aceita updater fn', () => {
    const { result } = renderHook(() =>
      useLocalStorage('k4', 0 as number) as any
    );
    act(() => result.current[1]((n: number) => n + 1));
    expect(result.current[0]).toBe(1);
  });
});

// ════════════════════════════════════════════
describe('useMedia', () => {
  it('retorna booleano', () => {
    const { result } = renderHook(() => useMedia('screen'));
    expect(typeof result.current).toBe('boolean');
  });
});

// ════════════════════════════════════════════
describe('useInterval', () => {
  it('não executa quando ms é null', () => {
    const fn = vi.fn();
    renderHook(() => useInterval(fn, null));
    expect(fn).not.toHaveBeenCalled();
  });

  it('executa imediatamente com immediate=true', () => {
    const fn = vi.fn();
    renderHook(() => useInterval(fn, 1000, true));
    expect(fn).toHaveBeenCalledTimes(1);
  });
});

// ════════════════════════════════════════════
describe('useClipboard', () => {
  beforeEach(() => { (global.navigator.clipboard.writeText as any).mockResolvedValue(undefined); });

  it('inicia copied=false', () => {
    const { result } = renderHook(() => useClipboard(2000));
    expect(result.current.copied).toBe(false);
  });
  it('copia texto com sucesso', async () => {
    const { result } = renderHook(() => useClipboard(5000));
    const ok = await act(() => result.current.copy('hello'));
    expect(ok).toBe(true);
    expect(result.current.copied).toBe(true);
  });
  it('retorna false em erro', async () => {
    (global.navigator.clipboard.writeText as any).mockRejectedValue(new Error('denied'));
    const { result } = renderHook(() => useClipboard(5000));
    const ok = await act(() => result.current.copy('falha'));
    expect(ok).toBe(false);
  });
});

// ════════════════════════════════════════════
describe('useFetch', () => {
  afterEach(() => { global.fetch = originalFetch; });

  const r200 = (body: unknown) =>
    new Response(JSON.stringify(body), { status: 200, headers: { 'Content-Type': 'application/json' } });

  it('retorna success para HTTP 200', async () => {
    global.fetch = vi.fn(() => Promise.resolve(r200({ ok: true }))) as any;
    const { result } = renderHook(() => useFetch('/api', {}) as any);
    await waitFor(() => expect(result.current.status).toBe('success'), { timeout: 4000 });
    expect((result.current as any).data.ok).toBe(true);
  });

  it('retorna error para HTTP 404', async () => {
    global.fetch = vi.fn(() => Promise.resolve(
      new Response('nf', { status: 404, headers: { 'Content-Type': 'application/json' } }))) as any;
    const { result } = renderHook(() => useFetch('/404', {}) as any);
    await waitFor(() => expect(result.current.status).toBe('error'), { timeout: 4000 });
  });

  it('retorna error em falha de rede', async () => {
    global.fetch = vi.fn(() => Promise.reject(new TypeError('net'))) as any;
    const { result } = renderHook(() => useFetch('/fail', {}) as any);
    await waitFor(() => expect(result.current.status).toBe('error'), { timeout: 4000 });
  });
});