using Core.Models;
using Core.Notes;
using Core.Services;
using Tests.Builders;

namespace Tests.Services;

[TestFixture]
public class StudentNotesImportPlan_Tests
{
    [SetUp]
    public void SetUp()
    {
        BuilderExtensions.ResetAllBuilders();
    }

    [Test]
    public void Create_SkipsUnchanged_CreatesAndUpdatesChanged()
    {
        var aria = StudentBuilder.Create("Aria", "Chittenden").Build();
        var blake = StudentBuilder.Create("Blake", "Nguyen").Build();
        var casey = StudentBuilder.Create("Casey", "Ortiz").Build();

        var firstWrite = ImportedFieldsTable.Merge(null, [new ImportedField("Application", "Yes")]);
        var unchanged = ImportedFieldsTable.Merge(firstWrite.Markdown, [new ImportedField("Application", "Yes")]);
        var created = ImportedFieldsTable.Merge(null, [new ImportedField("Interview Time", "3:20-3:35")]);
        var updated = ImportedFieldsTable.Merge(
            ImportedFieldsTable.Merge(null, [new ImportedField("Application", "Yes")]).Markdown,
            [new ImportedField("Application", "")]);

        var parseResult = new StudentNotesImportResult
        {
            Matches =
            [
                Match(aria, unchanged),
                Match(blake, created),
                Match(casey, updated)
            ]
        };

        HashSet<int> existingNoteIds = [casey.Id];
        var actions = StudentNotesImportPlan.Create(parseResult, existingNoteIds);

        Assert.That(actions, Has.Count.EqualTo(2));
        Assert.That(actions.Any(a => a.StudentId == aria.Id), Is.False);
        Assert.That(actions.Single(a => a.StudentId == blake.Id).Kind, Is.EqualTo(StudentNotePersistKind.Create));
        Assert.That(actions.Single(a => a.StudentId == casey.Id).Kind, Is.EqualTo(StudentNotePersistKind.Update));
        Assert.That(actions.Single(a => a.StudentId == casey.Id).Markdown, Is.EqualTo(updated.Markdown));
    }

    [Test]
    public void Create_EmptyMatches_ReturnsNoActions()
    {
        var actions = StudentNotesImportPlan.Create(new StudentNotesImportResult(), new HashSet<int>());
        Assert.That(actions, Is.Empty);
    }

    private static StudentNotesImportMatch Match(Core.Entities.Student student, ImportedFieldsMergeResult merge) =>
        new()
        {
            Student = student,
            Merge = merge
        };
}