using System;
using FluentAssertions;
using Xunit;

namespace Light.GuardClauses.Tests.ComparableAssertions;

public static class MustNotBeGreaterThanOrEqualToTests
{
    [Theory]
    [InlineData(2, 1)]
    [InlineData(1, 1)]
    [InlineData(-87, -88)]
    public static void ParameterAtOrAboveBoundary(int value, int boundary)
    {
        Action act = () => value.MustNotBeGreaterThanOrEqualTo(boundary, nameof(value));

        var exceptionAssertion = act.Should().Throw<ArgumentOutOfRangeException>().Which;
        exceptionAssertion.Message.Should().Contain($"{nameof(value)} must not be greater than or equal to {boundary}, but it actually is {value}.");
        exceptionAssertion.ParamName.Should().BeSameAs(nameof(value));
    }

    [Theory]
    [InlineData(0L, 1L)]
    [InlineData(-80L, -70L)]
    public static void ParameterBelowBoundary(long value, long boundary) => value.MustNotBeGreaterThanOrEqualTo(boundary).Should().Be(value);

    [Fact]
    public static void CustomException() =>
        Test.CustomException(20, 10, (x, y, exceptionFactory) => x.MustNotBeGreaterThanOrEqualTo(y, exceptionFactory));

    [Fact]
    public static void CustomExceptionParameterNull() => 
        Test.CustomException((string) null,
                             "Foo",
                             (x, y, exceptionFactory) => x.MustNotBeGreaterThanOrEqualTo(y, exceptionFactory));

    [Fact]
    public static void NoCustomExceptionThrown() => 5m.MustNotBeGreaterThanOrEqualTo(5.1m, (_, _) => null).Should().Be(5m);

    [Fact]
    public static void CustomMessage() =>
        Test.CustomMessage<ArgumentOutOfRangeException>(message => 300.MustNotBeGreaterThanOrEqualTo(300, message: message));

    [Fact]
    public static void CustomMessageParameterNull() => 
        Test.CustomMessage<ArgumentNullException>(message => ((string) null).MustNotBeGreaterThanOrEqualTo("Bar", message: message));

    [Fact]
    public static void CallerArgumentExpression()
    {
        var four = 4;

        Action act = () => four.MustNotBeGreaterThanOrEqualTo(4);

        act.Should().Throw<ArgumentOutOfRangeException>()
           .And.ParamName.Should().Be(nameof(four));
    }
}