using Core.Entities;
using Core.Parsers.EventOccurrence;
using FuzzySharp;
using NUnit.Framework;

namespace Tests.Parsers.EventOccurrence;

[TestFixture]
public class SectionHeaderMatcher_Tests
{
    [Test]
    public void IsGeneralSchedule_GeneralScheduleLine_ReturnsTrue()
    {
        // Act & Assert
        Assert.That(SectionHeaderMatcher.IsGeneralSchedule("General Schedule"), Is.True);
        Assert.That(SectionHeaderMatcher.IsGeneralSchedule("General Schedule - MS"), Is.True);
    }

    [Test]
    public void IsGeneralSchedule_RegularEvent_ReturnsFalse()
    {
        // Act & Assert
        Assert.That(SectionHeaderMatcher.IsGeneralSchedule("Test Event - MS"), Is.False);
    }

    [Test]
    public void HasSchoolLevel_ContainsMS_ReturnsTrue()
    {
        // Act & Assert
        Assert.That(SectionHeaderMatcher.HasSchoolLevel("Test Event - MS"), Is.True);
        Assert.That(SectionHeaderMatcher.HasSchoolLevel("Test Event MS"), Is.True);
    }

    [Test]
    public void HasSchoolLevel_ContainsHS_ReturnsTrue()
    {
        // Act & Assert
        Assert.That(SectionHeaderMatcher.HasSchoolLevel("Test Event - HS"), Is.True);
        Assert.That(SectionHeaderMatcher.HasSchoolLevel("Test Event HS"), Is.True);
    }

    [Test]
    public void HasSchoolLevel_NoSchoolLevel_ReturnsFalse()
    {
        // Act & Assert
        Assert.That(SectionHeaderMatcher.HasSchoolLevel("Test Event"), Is.False);
    }

    [Test]
    public void MatchEventDefinition_ExactMatch_ReturnsEvent()
    {
        // Arrange
        var events = new List<EventDefinition>
        {
            new() { Name = "Test Event" },
            new() { Name = "Another Event" }
        };

        // Act
        var result = SectionHeaderMatcher.MatchEventDefinition("Test Event", events);

        // Assert
        Assert.That(result, Is.Not.Null);
        Assert.That(result!.Name, Is.EqualTo("Test Event"));
    }

    [Test]
    public void MatchEventDefinition_CloseMatch_ReturnsEvent()
    {
        // Arrange
        var events = new List<EventDefinition>
        {
            new() { Name = "Test Event" },
            new() { Name = "Another Event" }
        };

        // Act
        var result = SectionHeaderMatcher.MatchEventDefinition("Test Evnt", events); // Typo but close

        // Assert
        Assert.That(result, Is.Not.Null);
        Assert.That(result!.Name, Is.EqualTo("Test Event"));
    }

    [Test]
    public void MatchEventDefinition_NoMatch_ReturnsNull()
    {
        // Arrange
        var events = new List<EventDefinition>
        {
            new() { Name = "Test Event" }
        };

        // Act
        var result = SectionHeaderMatcher.MatchEventDefinition("Completely Different Event", events);

        // Assert
        Assert.That(result, Is.Null);
    }

    [Test]
    public void MatchEventDefinition_EmptyEvents_ReturnsNull()
    {
        // Arrange
        var events = new List<EventDefinition>();

        // Act
        var result = SectionHeaderMatcher.MatchEventDefinition("Test Event", events);

        // Assert
        Assert.That(result, Is.Null);
    }

    [Test]
    public void MatchEventDefinition_MultipleMatches_ReturnsBestMatch()
    {
        // Arrange
        var events = new List<EventDefinition>
        {
            new() { Name = "Test Event" },
            new() { Name = "Test Event Advanced" },
            new() { Name = "Another Event" }
        };

        // Act
        var result = SectionHeaderMatcher.MatchEventDefinition("Test Event", events);

        // Assert
        Assert.That(result, Is.Not.Null);
        Assert.That(result!.Name, Is.EqualTo("Test Event")); // Exact match should win
    }

    [Test]
    public void GetBestMatchRatio_ValidEvents_ReturnsRatio()
    {
        // Arrange
        var events = new List<EventDefinition>
        {
            new() { Name = "Test Event" }
        };

        // Act
        var ratio = SectionHeaderMatcher.GetBestMatchRatio("Test Event", events);

        // Assert
        Assert.That(ratio, Is.GreaterThan(50)); // Should be high for exact match
    }

    [Test]
    public void GetBestMatchRatio_EmptyEvents_ReturnsZero()
    {
        // Arrange
        var events = new List<EventDefinition>();

        // Act
        var ratio = SectionHeaderMatcher.GetBestMatchRatio("Test Event", events);

        // Assert
        Assert.That(ratio, Is.EqualTo(0));
    }
}