using SquirrelBarContracts.DataModels;
using System.ComponentModel.DataAnnotations;

namespace SquirrelBarTests.DataModelsTests;

[TestFixture]
internal class ClientDiscountDataModelTests
{
    [Test]
    public void BuyerIdIsNullOrEmptyTest()
    {
        var product = CreateDataModel(null, 100,10);
        Assert.That(() => product.Validate(),
        Throws.TypeOf<ValidationException>());
        product = CreateDataModel(string.Empty, 100,10);
        Assert.That(() => product.Validate(),
        Throws.TypeOf<ValidationException>());
    }
    [Test]
    public void ProductIdIsNotGuidTest()
    {
        var product = CreateDataModel("id", 100,10);
        Assert.That(() => product.Validate(),
        Throws.TypeOf<ValidationException>());
    }
    [Test]
    public void personalDiscountIsLessThenZeroTest()
    {
        var product = CreateDataModel(Guid.NewGuid().ToString(), -100, 10);
        Assert.That(() => product.Validate(),
        Throws.TypeOf<ValidationException>());
    }

    [Test]
    public void TotalSumIsLessThenZeroTest()
    {
        var product = CreateDataModel(Guid.NewGuid().ToString(), -100, 10);
        Assert.That(() => product.Validate(),
        Throws.TypeOf<ValidationException>());
    }

    [Test]
    public void AllFieldsIsCorrectTest()
    {
        var buyerId = Guid.NewGuid().ToString();
        var totalSum = 100;
        var personalDiscount = 10;
        var clientDiscount = CreateDataModel(buyerId, totalSum, personalDiscount);
        Assert.That(() => clientDiscount.Validate(), Throws.Nothing);
        Assert.Multiple(() =>
        {
            Assert.That(clientDiscount.BuyerId, Is.EqualTo(buyerId));
            Assert.That(clientDiscount.TotalSum, Is.EqualTo(totalSum));
            Assert.That(clientDiscount.PersonalDiscount, Is.EqualTo(personalDiscount));
          
        });
    }
    private static ClientDiscountDataModel CreateDataModel(string? buyerId, double totalSum, double personalDiscount) =>
    new(buyerId, totalSum, personalDiscount);
}