using Moq;
using NUnit.Framework;
using System;
using System.Collections.Generic;
using CandyHouseBase.DataModels;
using CandyHouseBase.Enums;
using CandyHouseBase.Exceptions;
using CandyHouseBase.Implementations;
using CandyHouseBase.Interfaces.BusinessLogicsContracts;
using CandyHouseBase.Interfaces.StoragesContracts;
using Microsoft.Extensions.Logging;

namespace CandyHouseTests.BusinessLogicsContractsTests
{
    [TestFixture]
    internal class OrderBusinessLogicContractTests
    {
        private OrderBusinessLogicContract _orderBusinessLogicContract;
        private Mock<IOrderStorageContact> _orderStorageContact;
        private Mock<IPekarStorageContact> _pekarStorageContact;
        private Mock<IProductStorageContact> _productStorageContact;

        [OneTimeSetUp]
        public void OneTimeSetUp()
        {
            _orderStorageContact = new Mock<IOrderStorageContact>();
            _pekarStorageContact = new Mock<IPekarStorageContact>();
            _productStorageContact = new Mock<IProductStorageContact>();
            _orderBusinessLogicContract = new OrderBusinessLogicContract(
                _orderStorageContact.Object,
                _pekarStorageContact.Object,
                _productStorageContact.Object,
                new Mock<ILogger>().Object
            );
        }

        [SetUp]
        public void SetUp()
        {
            _orderStorageContact.Reset();
            _pekarStorageContact.Reset();
            _productStorageContact.Reset();
        }

        [Test]
        public void GetAllOrders_ReturnsListOfRecords_Test()
        {
            // Arrange
            var pekarId = Guid.NewGuid().ToString();
            var productId = Guid.NewGuid().ToString();
            var orders = new List<OrderDataModel>
            {
                new OrderDataModel(
                    Guid.NewGuid().ToString(),
                    "John Doe",
                    DateTime.Now.AddDays(-1),
                    100.50m,
                    10.50m,
                    productId,
                    pekarId,
                    StatusType.Pending
                ),
                new OrderDataModel(
                    Guid.NewGuid().ToString(),
                    "Jane Smith",
                    DateTime.Now,
                    200.00m,
                    20.00m,
                    productId,
                    pekarId,
                    StatusType.Completed
                )
            };
            _orderStorageContact.Setup(x => x.GetOrders()).Returns(orders);
            _pekarStorageContact.Setup(x => x.GetElementById(pekarId))
                .Returns(new PekarDataModel(pekarId, "Ivan Ivanov", "Baker", 1.5m, new List<ProductDataModel>()));
            _productStorageContact.Setup(x => x.GetElementById(productId))
                .Returns(new ProductDataModel(productId, "Cake", "Super soft cake", new List<IngredientDataModel>()));

            // Act
            var list = _orderBusinessLogicContract.GetAllOrders();

            // Assert
            Assert.That(list, Is.Not.Null);
            Assert.That(list, Is.EquivalentTo(orders));
        }

        [Test]
        public void GetAllOrders_ReturnsEmptyList_Test()
        {
            // Arrange
            _orderStorageContact.Setup(x => x.GetOrders()).Returns(new List<OrderDataModel>());

            // Act
            var list = _orderBusinessLogicContract.GetAllOrders();

            // Assert
            Assert.That(list, Is.Not.Null);
            Assert.That(list, Has.Count.EqualTo(0));
            _orderStorageContact.Verify(x => x.GetOrders(), Times.Once);
        }

        [Test]
        public void GetAllOrders_ReturnsNull_ThrowException_Test()
        {
            // Arrange
            _orderStorageContact.Setup(x => x.GetOrders()).Returns((List<OrderDataModel>)null);

            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.GetAllOrders(), Throws.TypeOf<NullListException>());
            _orderStorageContact.Verify(x => x.GetOrders(), Times.Once);
        }

        [Test]
        public void GetAllOrders_StorageThrowError_ThrowException_Test()
        {
            // Arrange
            _orderStorageContact.Setup(x => x.GetOrders())
                .Throws(new StorageException(new InvalidOperationException()));

            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.GetAllOrders(), Throws.TypeOf<StorageException>());
            _orderStorageContact.Verify(x => x.GetOrders(), Times.Once);
        }

        [Test]
        public void GetOrderByData_ReturnsOrderById_Test()
        {
            // Arrange
            var id = Guid.NewGuid().ToString();
            var order = new OrderDataModel(
                id,
                "John Doe",
                DateTime.Now,
                100.50m,
                10.50m,
                Guid.NewGuid().ToString(),
                Guid.NewGuid().ToString(),
                StatusType.Pending
            );
            _orderStorageContact.Setup(x => x.GetElementById(It.Is<int>(i => i.ToString() == id))).Returns(order);

            // Act
            var element = _orderBusinessLogicContract.GetOrderByData(id);

            // Assert
            Assert.That(element, Is.Not.Null);
            Assert.That(element.Id, Is.EqualTo(id));
            _orderStorageContact.Verify(x => x.GetElementById(It.Is<int>(i => i.ToString() == id)), Times.Once);
        }

        [Test]
        public void GetOrderByData_EmptyData_ThrowException_Test()
        {
            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.GetOrderByData(null), Throws.TypeOf<ArgumentNullException>());
            Assert.That(() => _orderBusinessLogicContract.GetOrderByData(string.Empty),
                Throws.TypeOf<ArgumentNullException>());
            _orderStorageContact.Verify(x => x.GetElementById(It.IsAny<int>()), Times.Never);
        }

        [Test]
        public void GetOrderByData_NotFoundRecord_ThrowException_Test()
        {
            // Arrange
            var id = "999";
            _orderStorageContact.Setup(x => x.GetElementById(It.Is<int>(i => i.ToString() == id)))
                .Returns((OrderDataModel)null);

            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.GetOrderByData(id),
                Throws.TypeOf<ElementNotFoundException>());
            _orderStorageContact.Verify(x => x.GetElementById(It.Is<int>(i => i.ToString() == id)), Times.Once);
        }

        [Test]
        public void GetOrderByData_StorageThrowError_ThrowException_Test()
        {
            // Arrange
            _orderStorageContact.Setup(x => x.GetElementById(It.IsAny<int>()))
                .Throws(new StorageException(new InvalidOperationException()));

            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.GetOrderByData("1"), Throws.TypeOf<StorageException>());
            _orderStorageContact.Verify(x => x.GetElementById(It.IsAny<int>()), Times.Once);
        }

        [Test]
        public void InsertOrder_CorrectRecord_Test()
        {
            // Arrange
            var pekarId = Guid.NewGuid().ToString();
            var productId = Guid.NewGuid().ToString();
            var flag = false;
            var order = new OrderDataModel(
                Guid.NewGuid().ToString(),
                "John Doe",
                DateTime.Now,
                100.50m,
                10.50m,
                productId,
                pekarId,
                StatusType.Pending
            );
            _orderStorageContact.Setup(x => x.AddElement(It.IsAny<OrderDataModel>()))
                .Callback((OrderDataModel x) =>
                {
                    flag = x.Id == order.Id && x.CustomerName == order.CustomerName && x.OrderDate == order.OrderDate &&
                           x.TotalAmount == order.TotalAmount && x.DiscountAmount == order.DiscountAmount &&
                           x.ProductId == order.ProductId && x.PekarId == order.PekarId &&
                           x.StatusType == order.StatusType;
                });
            _pekarStorageContact.Setup(x => x.GetElementById(pekarId))
                .Returns(new PekarDataModel(pekarId, "Ivan Ivanov", "Baker", 1.5m, new List<ProductDataModel>()));
            _productStorageContact.Setup(x => x.GetElementById(productId))
                .Returns(new ProductDataModel(productId, "Cake", "Super soft cake", new List<IngredientDataModel>()));

            // Act
            _orderBusinessLogicContract.InsertOrder(order);

            // Assert
            _orderStorageContact.Verify(x => x.AddElement(It.IsAny<OrderDataModel>()), Times.Once);
            Assert.That(flag);
        }

        [Test]
        public void InsertOrder_RecordWithExistsData_ThrowException_Test()
        {
            // Arrange
            var order = new OrderDataModel(
                Guid.NewGuid().ToString(),
                "John Doe",
                DateTime.Now,
                100.50m,
                10.50m,
                Guid.NewGuid().ToString(),
                Guid.NewGuid().ToString(),
                StatusType.Pending
            );
            _orderStorageContact.Setup(x => x.AddElement(It.IsAny<OrderDataModel>()))
                .Throws(new ElementExistsException("ID", order.Id));

            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.InsertOrder(order), Throws.TypeOf<ElementExistsException>());
            _orderStorageContact.Verify(x => x.AddElement(It.IsAny<OrderDataModel>()), Times.Once);
        }

        [Test]
        public void InsertOrder_NullRecord_ThrowException_Test()
        {
            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.InsertOrder(null), Throws.TypeOf<ArgumentNullException>());
            _orderStorageContact.Verify(x => x.AddElement(It.IsAny<OrderDataModel>()), Times.Never);
        }

        [Test]
        public void InsertOrder_InvalidRecord_ThrowException_Test()
        {
            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.InsertOrder(new OrderDataModel(
                "",
                "",
                DateTime.Now,
                -100.50m, 
                -10.50m, 
                "", 
                "", 
                StatusType.Pending
            )), Throws.TypeOf<ValidationException>());
            _orderStorageContact.Verify(x => x.AddElement(It.IsAny<OrderDataModel>()), Times.Never);
        }

        [Test]
        public void InsertOrder_StorageThrowError_ThrowException_Test()
        {
            // Arrange
            var order = new OrderDataModel(
                Guid.NewGuid().ToString(),
                "John Doe",
                DateTime.Now,
                100.50m,
                10.50m,
                Guid.NewGuid().ToString(),
                Guid.NewGuid().ToString(),
                StatusType.Pending
            );
            _orderStorageContact.Setup(x => x.AddElement(It.IsAny<OrderDataModel>()))
                .Throws(new StorageException(new InvalidOperationException()));

            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.InsertOrder(order), Throws.TypeOf<StorageException>());
            _orderStorageContact.Verify(x => x.AddElement(It.IsAny<OrderDataModel>()), Times.Once);
        }

        [Test]
        public void UpdateOrder_CorrectRecord_Test()
        {
            // Arrange
            var pekarId = Guid.NewGuid().ToString();
            var productId = Guid.NewGuid().ToString();
            var flag = false;
            var order = new OrderDataModel(
                Guid.NewGuid().ToString(),
                "John Doe",
                DateTime.Now,
                100.50m,
                10.50m,
                productId,
                pekarId,
                StatusType.Pending
            );
            _orderStorageContact.Setup(x => x.UpdateElement(It.IsAny<OrderDataModel>()))
                .Callback((OrderDataModel x) =>
                {
                    flag = x.Id == order.Id && x.CustomerName == order.CustomerName && x.OrderDate == order.OrderDate &&
                           x.TotalAmount == order.TotalAmount && x.DiscountAmount == order.DiscountAmount &&
                           x.ProductId == order.ProductId && x.PekarId == order.PekarId &&
                           x.StatusType == order.StatusType;
                });
            _pekarStorageContact.Setup(x => x.GetElementById(pekarId))
                .Returns(new PekarDataModel(pekarId, "Ivan Ivanov", "Baker", 1.5m, new List<ProductDataModel>()));
            _productStorageContact.Setup(x => x.GetElementById(productId))
                .Returns(new ProductDataModel(productId, "Cake", "Super soft cake", new List<IngredientDataModel>()));

            // Act
            _orderBusinessLogicContract.UpdateOrder(order);

            // Assert
            _orderStorageContact.Verify(x => x.UpdateElement(It.IsAny<OrderDataModel>()), Times.Once);
            Assert.That(flag);
        }

        [Test]
        public void UpdateOrder_RecordNotFound_ThrowException_Test()
        {
            // Arrange
            var order = new OrderDataModel(
                Guid.NewGuid().ToString(),
                "John Doe",
                DateTime.Now,
                100.50m,
                10.50m,
                Guid.NewGuid().ToString(),
                Guid.NewGuid().ToString(),
                StatusType.Pending
            );
            _orderStorageContact.Setup(x => x.UpdateElement(It.IsAny<OrderDataModel>()))
                .Throws(new ElementNotFoundException("Order not found"));

            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.UpdateOrder(order),
                Throws.TypeOf<ElementNotFoundException>());
            _orderStorageContact.Verify(x => x.UpdateElement(It.IsAny<OrderDataModel>()), Times.Once);
        }

        [Test]
        public void UpdateOrder_NullRecord_ThrowException_Test()
        {
            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.UpdateOrder(null), Throws.TypeOf<ArgumentNullException>());
            _orderStorageContact.Verify(x => x.UpdateElement(It.IsAny<OrderDataModel>()), Times.Never);
        }

        [Test]
        public void UpdateOrder_InvalidRecord_ThrowException_Test()
        {
            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.UpdateOrder(new OrderDataModel(
                "", 
                "",
                DateTime.Now,
                -100.50m,
                -10.50m, 
                "", 
                "", 
                StatusType.Pending
            )), Throws.TypeOf<ValidationException>());
            _orderStorageContact.Verify(x => x.UpdateElement(It.IsAny<OrderDataModel>()), Times.Never);
        }

        [Test]
        public void UpdateOrder_StorageThrowError_ThrowException_Test()
        {
            // Arrange
            var order = new OrderDataModel(
                Guid.NewGuid().ToString(),
                "John Doe",
                DateTime.Now,
                100.50m,
                10.50m,
                Guid.NewGuid().ToString(),
                Guid.NewGuid().ToString(),
                StatusType.Pending
            );
            _orderStorageContact.Setup(x => x.UpdateElement(It.IsAny<OrderDataModel>()))
                .Throws(new StorageException(new InvalidOperationException()));

            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.UpdateOrder(order), Throws.TypeOf<StorageException>());
            _orderStorageContact.Verify(x => x.UpdateElement(It.IsAny<OrderDataModel>()), Times.Once);
        }

        [Test]
        public void DeleteOrder_CorrectId_Test()
        {
            // Arrange
            var id = Guid.NewGuid().ToString();
            var order = new OrderDataModel(
                id,
                "John Doe",
                DateTime.Now,
                100.50m,
                10.50m,
                Guid.NewGuid().ToString(),
                Guid.NewGuid().ToString(),
                StatusType.Pending
            );
            var flag = false;
            _orderStorageContact.Setup(x => x.DeleteElement(It.Is<OrderDataModel>(o => o.Id == id)))
                .Callback(() => { flag = true; });
            _orderStorageContact.Setup(x => x.GetOrders()).Returns(new List<OrderDataModel> { order });

            // Act
            _orderBusinessLogicContract.DeleteOrder(id);

            // Assert
            _orderStorageContact.Verify(x => x.DeleteElement(It.Is<OrderDataModel>(o => o.Id == id)), Times.Once);
            Assert.That(flag);
        }

        [Test]
        public void DeleteOrder_RecordNotFound_ThrowException_Test()
        {
            // Arrange
            var id = "nonexistent";
            _orderStorageContact.Setup(x => x.GetOrders()).Returns(new List<OrderDataModel>());
            _orderStorageContact.Setup(x => x.DeleteElement(It.Is<OrderDataModel>(o => o.Id == id)))
                .Throws(new ElementNotFoundException("Order not found"));

            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.DeleteOrder(id), Throws.TypeOf<ElementNotFoundException>());
            _orderStorageContact.Verify(x => x.DeleteElement(It.Is<OrderDataModel>(o => o.Id == id)), Times.Once);
        }

        [Test]
        public void DeleteOrder_NullOrEmptyId_ThrowException_Test()
        {
            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.DeleteOrder(null), Throws.TypeOf<ArgumentNullException>());
            Assert.That(() => _orderBusinessLogicContract.DeleteOrder(string.Empty),
                Throws.TypeOf<ArgumentNullException>());
            _orderStorageContact.Verify(x => x.DeleteElement(It.IsAny<OrderDataModel>()), Times.Never);
        }

        [Test]
        public void DeleteOrder_InvalidId_ThrowException_Test()
        {
            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.DeleteOrder("invalid"), Throws.TypeOf<ValidationException>());
            _orderStorageContact.Verify(x => x.DeleteElement(It.IsAny<OrderDataModel>()), Times.Never);
        }

        [Test]
        public void DeleteOrder_StorageThrowError_ThrowException_Test()
        {
            // Arrange
            _orderStorageContact.Setup(x => x.DeleteElement(It.IsAny<OrderDataModel>()))
                .Throws(new StorageException(new InvalidOperationException()));

            // Act & Assert
            Assert.That(() => _orderBusinessLogicContract.DeleteOrder(Guid.NewGuid().ToString()),
                Throws.TypeOf<StorageException>());
            _orderStorageContact.Verify(x => x.DeleteElement(It.IsAny<OrderDataModel>()), Times.Once);
        }
    }
}