import { describe, it, expect, vi, beforeEach } from 'vitest';
import { getPermit2Nonce } from './permit2-nonce';
import { PublicActions } from 'viem';

describe('permit2-nonce', () => {
  const now = new Date('2023-01-01T00:00:00Z');

  const getNow = () => Math.floor(now.getTime() / 1000);

  beforeEach(() => {
    vi.useFakeTimers();
  });

  it('getPermit2Nonce should return correct nonce', async () => {
    const mockClient = {
      readContract: vi.fn().mockResolvedValue(0n),
    } as unknown as PublicActions;

    const account = '0x1234567890123456789012345678901234567890';
    const spender = '0x0987654321098765432109876543210987654321';

    const nonce = await getPermit2Nonce(mockClient, account, spender, getNow);

    expect(nonce).toBeDefined();
    expect(typeof nonce).toBe('bigint');

    expect(mockClient.readContract).toHaveBeenCalledWith({
      address: '0x000000000022D473030F116dDEE9F6B43aC78BA3',
      abi: expect.any(Array),
      functionName: 'nonceBitmap',
      args: expect.any(Array),
    });
  });

  it('getPermit2Nonce should handle multiple bitmap checks', async () => {
    const mockClient = {
      readContract: vi
        .fn()
        .mockResolvedValueOnce(2n ** 256n - 1n) // All bits set
        .mockResolvedValueOnce(0n), // No bits set
    } as unknown as PublicActions;

    const account = '0x1234567890123456789012345678901234567890';
    const spender = '0x0987654321098765432109876543210987654321';

    const nonce = await getPermit2Nonce(mockClient, account, spender, getNow);

    expect(nonce).toBeDefined();
    expect(typeof nonce).toBe('bigint');

    expect(mockClient.readContract).toHaveBeenCalledTimes(2);
  });
});