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

namespace RomashkiTests
{
    [TestFixture]
    internal class SaleDataModelTests
    {
        [Test]
        public void IdIsNullOrEmptyTest()
        {
            var sale = CreateDataModel(null, Guid.NewGuid().ToString(),
            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
            sale = CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 
            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void IdIsNotGuidTest()
        {
            var sale = CreateDataModel("id", Guid.NewGuid().ToString(),
            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
            
        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void WorkerIdIsNullOrEmptyTest()
        {
            var sale = CreateDataModel(Guid.NewGuid().ToString(), null,
            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
            Assert.That(() => sale.Validate(),
            Throws.TypeOf<ValidationException>());
            sale = CreateDataModel(Guid.NewGuid().ToString(), string.Empty,
            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void WorkerIdIsNotGuidTest()
        {
            var sale = CreateDataModel(Guid.NewGuid().ToString(), "workerId",
            Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void BuyerIdIsNotGuidTest()
        {
            var sale = CreateDataModel(Guid.NewGuid().ToString(),
            Guid.NewGuid().ToString(), "buyerId", 10, DiscountType.OnSale, 10, false, CreateSubDataModel());
            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void SumIsLessOrZeroTest()
        {
            var sale = CreateDataModel(Guid.NewGuid().ToString(),
            Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0, DiscountType.OnSale, 10, false, CreateSubDataModel());
            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
            sale = CreateDataModel(Guid.NewGuid().ToString(),
            Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -10, DiscountType.OnSale, 10, false, CreateSubDataModel());
            Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void ProductsIsNullOrEmptyTest()
        {
            var sale = CreateDataModel(Guid.NewGuid().ToString(),
            Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, null);
            Assert.That(() => sale.Validate(),
            Throws.TypeOf<ValidationException>());
            sale = CreateDataModel(Guid.NewGuid().ToString(), 
            Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 10, DiscountType.OnSale, 10, false, []);
            
        Assert.That(() => sale.Validate(), Throws.TypeOf<ValidationException>());
        }
        [Test]
        public void AllFieldsIsCorrectTest()
        {
            var saleId = Guid.NewGuid().ToString();
            var workerId = Guid.NewGuid().ToString();
            var buyerId = Guid.NewGuid().ToString();
            var sum = 10;
            var discountType = DiscountType.Certificate;
            var discount = 1;
            var isCancel = true;
            var products = CreateSubDataModel();
            var sale = CreateDataModel(saleId, workerId, buyerId, sum, discountType, discount, isCancel, products);
            Assert.That(() => sale.Validate(), Throws.Nothing);
            Assert.Multiple(() =>
            {
                Assert.That(sale.Id, Is.EqualTo(saleId));
                Assert.That(sale.WorkerId, Is.EqualTo(workerId));
                Assert.That(sale.BuyerId, Is.EqualTo(buyerId));
                Assert.That(sale.Sum, Is.EqualTo(sum));
                Assert.That(sale.DiscountType, Is.EqualTo(discountType));
                Assert.That(sale.Discount, Is.EqualTo(discount));
                Assert.That(sale.IsCancel, Is.EqualTo(isCancel));
                Assert.That(sale.Products, Is.EquivalentTo(products));
            });
        }
        private static SaleDataModel CreateDataModel(string? id, string? workerId,string? buyerId, double sum,
            DiscountType discountType, double discount, bool isCancel, List<SaleProductDataModel>? products) => 
            new(id, workerId, buyerId, sum, discountType, discount, isCancel, products);
        private static List<SaleProductDataModel> CreateSubDataModel() => [new(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 1)];
    }

}