using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using RomashkiContracts.DataModels;
using RomashkiContracts.Exceptions;

namespace RomashkiTests
{
    [TestFixture]
    internal class SaleProductDataModelTests
    {
        [Test]
        public void SaleIdIsNullOrEmptyTest()
        {
            var saleProduct = CreateDataModel(null, Guid.NewGuid().ToString(),
            10);
            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
            saleProduct = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void SaleIdIsNotGuidTest()
        {
            var saleProduct = CreateDataModel("saleId", Guid.NewGuid().ToString(), 10);
            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void ProductIdIsNullOrEmptyTest()
        {
            var saleProduct = CreateDataModel(Guid.NewGuid().ToString(), null, 10);
            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
            saleProduct = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 10);
            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void ProductIdIsNotGuidTest()
        {
            var saleProduct = CreateDataModel(Guid.NewGuid().ToString(), "productId", 10);
            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void CountIsLessOrZeroTest()
        {
            var saleProduct = CreateDataModel(Guid.NewGuid().ToString(),
            Guid.NewGuid().ToString(), 0);
            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
            
        saleProduct = CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10);
            Assert.That(() => saleProduct.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void AllFieldsIsCorrectTest()
        {
            var saleId = Guid.NewGuid().ToString();
            var productId = Guid.NewGuid().ToString();
            var count = 10;
            var saleProduct = CreateDataModel(saleId, productId, count);
            Assert.That(() => saleProduct.Validate(), Throws.Nothing);
            Assert.Multiple(() =>
            {
                Assert.That(saleProduct.SaleId, Is.EqualTo(saleId));
                Assert.That(saleProduct.ProductId, Is.EqualTo(productId));
                Assert.That(saleProduct.Count, Is.EqualTo(count));
            });
        }
        private static SaleProductDataModel CreateDataModel(string? saleId, string? productId, int count) => new(saleId, productId, count);
    }

}