using Dpz.Core.Entity.Base;

namespace Dpz.Core.Simple.Test;

public class GetterSetterTest
{
    private class Person
    {
        public string? Name { get; set; }
        public int Age { get; set; }
        public string ReadOnly { get; } = "ro";
    }

    [Test]
    public void Setter_And_Getter_For_Reference_Type_Work()
    {
        var setter = PropertyAccessor.GetSetter<Person>(nameof(Person.Name));
        var getter = PropertyAccessor.GetGetter<Person>(nameof(Person.Name));

        Assert.That(setter, Is.Not.Null);
        Assert.That(getter, Is.Not.Null);

        var p = new Person();
        setter!(p, "Alice");
        var value = getter!(p);

        Assert.That(value, Is.EqualTo("Alice"));
    }

    [Test]
    public void Setter_And_Getter_For_Value_Type_Work()
    {
        var setter = PropertyAccessor.GetSetter<Person>(nameof(Person.Age));
        var getter = PropertyAccessor.GetGetter<Person>(nameof(Person.Age));

        Assert.That(setter, Is.Not.Null);
        Assert.That(getter, Is.Not.Null);

        var p = new Person();
        setter!(p, 42);
        var value = getter!(p);

        Assert.That(value, Is.EqualTo(42));
    }

    [Test]
    public void Getter_And_Setter_Are_Cached()
    {
        var s1 = PropertyAccessor.GetSetter<Person>(nameof(Person.Name));
        var s2 = PropertyAccessor.GetSetter<Person>(nameof(Person.Name));
        var g1 = PropertyAccessor.GetGetter<Person>(nameof(Person.Name));
        var g2 = PropertyAccessor.GetGetter<Person>(nameof(Person.Name));

        Assert.That(ReferenceEquals(s1, s2), Is.True);
        Assert.That(ReferenceEquals(g1, g2), Is.True);
    }

    [Test]
    public void Getter_For_Invalid_Property_Is_Null()
    {
        var getter = PropertyAccessor.GetGetter<Person>("NotExists");
        Assert.That(getter, Is.Null);
    }

    [Test]
    public void Setter_For_ReadOnly_Property_Is_Null()
    {
        var setter = PropertyAccessor.GetSetter<Person>(nameof(Person.ReadOnly));
        Assert.That(setter, Is.Null);
    }
}