namespace Workflow.Tests.Condition;

using FluentAssertions;
using Workflow.Domain.Expressions.Comparators;
using Xunit;

public class DateTimeComparatorTests
{
    private readonly DateTimeComparator _sut = new();

    [Fact]
    public void Compare_Equals_SameDate_ReturnsTrue()
    {
        var date = new DateTime(2024, 1, 15);
        _sut.Compare(date, "==", "2024-01-15").Should().BeTrue();
    }

    [Fact]
    public void Compare_Equals_DifferentDate_ReturnsFalse()
    {
        var date = new DateTime(2024, 1, 15);
        _sut.Compare(date, "==", "2024-01-16").Should().BeFalse();
    }

    [Fact]
    public void Compare_NotEquals_ReturnsTrue()
    {
        var date = new DateTime(2024, 1, 15);
        _sut.Compare(date, "!=", "2024-01-16").Should().BeTrue();
    }

    [Fact]
    public void Compare_GreaterThan_ReturnsTrue()
    {
        var date = new DateTime(2024, 6, 1);
        _sut.Compare(date, ">", "2024-01-01").Should().BeTrue();
    }

    [Fact]
    public void Compare_LessThan_ReturnsTrue()
    {
        var date = new DateTime(2024, 1, 1);
        _sut.Compare(date, "<", "2024-06-01").Should().BeTrue();
    }

    [Fact]
    public void Compare_GreaterThanOrEqual_Equal()
    {
        var date = new DateTime(2024, 1, 15);
        _sut.Compare(date, ">=", "2024-01-15").Should().BeTrue();
    }

    [Fact]
    public void Compare_LessThanOrEqual_Equal()
    {
        var date = new DateTime(2024, 1, 15);
        _sut.Compare(date, "<=", "2024-01-15").Should().BeTrue();
    }

    [Fact]
    public void Compare_StringDate_ISO8601()
    {
        _sut.Compare("2024-01-15", "==", "2024-01-15").Should().BeTrue();
    }

    [Fact]
    public void Compare_StringDate_WithTime()
    {
        _sut.Compare("2024-01-15T10:30:00", "==", "2024-01-15T10:30:00").Should().BeTrue();
    }

    [Fact]
    public void Compare_InvalidDate_ReturnsFalse()
    {
        _sut.Compare("not-a-date", "==", "2024-01-15").Should().BeFalse();
    }

    [Fact]
    public void Compare_NumericField_ReturnsFalse()
    {
        _sut.Compare(100, "==", "2024-01-15").Should().BeFalse();
    }

    [Fact]
    public void Compare_NullField_ReturnsFalse()
    {
        _sut.Compare(null, "==", "2024-01-15").Should().BeFalse();
    }

    [Fact]
    public void Compare_UnsupportedOperator_ReturnsFalse()
    {
        _sut.Compare(new DateTime(2024, 1, 15), "contains", "2024").Should().BeFalse();
    }

    [Fact]
    public void Compare_GreaterThan_DateTimeLater()
    {
        _sut.Compare("2024-12-31", ">", "2024-01-01").Should().BeTrue();
    }
}