using FluentAssertions;
using foodmarket.Application.Common;
using Xunit;

namespace foodmarket.UnitTests;

public class PinHasherTests
{
    [Fact]
    public void Hash_then_verify_roundtrips()
    {
        var hash = PinHasher.Hash("1234");
        PinHasher.Verify("1234", hash).Should().BeTrue();
        PinHasher.Verify("1235", hash).Should().BeFalse();
    }

    [Fact]
    public void Hash_is_salted_different_each_time()
    {
        PinHasher.Hash("4321").Should().NotBe(PinHasher.Hash("4321"));
    }

    [Fact]
    public void Verify_handles_null_and_garbage()
    {
        PinHasher.Verify("1234", null).Should().BeFalse();
        PinHasher.Verify("1234", "").Should().BeFalse();
        PinHasher.Verify("1234", "not-a-hash").Should().BeFalse();
    }

    [Theory]
    [InlineData("1234", true)]
    [InlineData("123456", true)]
    [InlineData("123", false)]
    [InlineData("1234567", false)]
    [InlineData("12a4", false)]
    [InlineData(null, false)]
    public void IsValidPin_rules(string? pin, bool expected)
        => PinHasher.IsValidPin(pin).Should().Be(expected);
}