using System.Text;
using Core.Entities;
using Core.Models;
using Core.Parsers;
using Tests.Builders;

namespace Tests.Parsers;

public class AssignmentRequirement_Tests
{
	[Test]
	public void ParseTest()
	{
		var competitiveEvents = TestEntityHandler.GetEvents();
		var students = TestEntityHandler.GetStudents(competitiveEvents);
		var eventRequirements = TestEntityHandler.GetEventRequirements(competitiveEvents, students);

		foreach (var ea in eventRequirements)
        {
            Console.WriteLine($"{ea.Requirement,10} {ea.EventDefinition.ShortName, -20} {ea.Student.FirstName}");
		}

		Assert.Pass();
	}

	[Test]
	public void Parse_MatchesNicknameColumnsForTwoJosiahs()
	{
		StudentBuilder.ResetIdCounter();
		var jo = StudentBuilder.Create("Josiah", "Brown").WithNickname("Jo").Build();
		var josiahB = StudentBuilder.Create("Josiah", "Green").WithNickname("Josiah B").Build();
		var coding = EventDefinitionBuilder.Individual("Coding").WithShortName("Coding").Build();

		const string csv = """
			,Jo,josiah b
			Coding,i,x
			""";

		var requirements = ParseCsv(csv, [coding], [jo, josiahB]);

		Assert.That(requirements, Has.Length.EqualTo(2));
		Assert.That(requirements.Single(r => r.Student.Id == jo.Id).Requirement, Is.EqualTo(Requirement.Include));
		Assert.That(requirements.Single(r => r.Student.Id == josiahB.Id).Requirement, Is.EqualTo(Requirement.Exclude));
	}

	[Test]
	public void Parse_SharedLegalFirstName_TakesFirstStudent()
	{
		StudentBuilder.ResetIdCounter();
		var first = StudentBuilder.Create("Josiah", "Brown").WithNickname("Jo").Build();
		var second = StudentBuilder.Create("Josiah", "Green").WithNickname("Josiah B").Build();
		var coding = EventDefinitionBuilder.Individual("Coding").WithShortName("Coding").Build();

		const string csv = """
			,Josiah
			Coding,i
			""";

		var requirements = ParseCsv(csv, [coding], [first, second]);

		Assert.That(requirements, Has.Length.EqualTo(1));
		Assert.That(requirements[0].Student.Id, Is.EqualTo(first.Id));
	}

	private static AssignmentRequirement[] ParseCsv(
		string csv,
		ICollection<EventDefinition> events,
		ICollection<Student> students)
	{
		using var reader = new StreamReader(new MemoryStream(Encoding.UTF8.GetBytes(csv)));
		using var parser = new AssignmentRequirementParser(reader);
		return parser.Parse(events, students);
	}
}