using Avalonia;
using Avalonia.Headless;
using Avalonia.Controls;
using TovarV2;
using Avalonia.Media.Imaging;
using System.IO;
using System.Linq;

namespace TestTovarV2
{
    [TestFixture]
    public class AddTovarTests
    {
        private AddTovar _addTovar;

        [OneTimeSetUp]
        public void OneTimeSetup()
        {
            AppBuilder.Configure<App>()
                .UseHeadless(new AvaloniaHeadlessPlatformOptions())
                .SetupWithoutStarting();
        }

        [SetUp]
        public void Setup()
        {
            ListPr.ListProd.Clear();
            ListPr.b = 0;
            _addTovar = new AddTovar();
            _addTovar.Show();
        }

        [TearDown]
        public void TearDown()
        {
            _addTovar.Close();
            ListPr.ListProd.Clear();
        }
        
        [Test]
        public void AddTovarOkClick_ShouldAddProduct_WhenFieldsIsValid()
        {
            _addTovar.GetNameTov.Text = "New Product";
            _addTovar.GetPriceTov.Text = "100";
            _addTovar.GetQuantityTov.Text = "10";
            _addTovar.bitmapToBind = new Bitmap(Path.Combine("Assets", "test_image.png"));

            _addTovar.AddTovarOk_Click(null, null);

            Assert.That(ListPr.ListProd.Count, Is.EqualTo(1));
            Assert.That(ListPr.ListProd[0].nameProd, Is.EqualTo("New Product"));
            Assert.That(ListPr.ListProd[0].priceProd, Is.EqualTo(100));
            Assert.That(ListPr.ListProd[0].quantityProd, Is.EqualTo(10));
            Assert.That(ListPr.ListProd[0].bitmapProd, Is.Not.Null);
            Assert.That(ProductEdit.IsOpen, Is.True);
        }
        
        [Test]
        public void AddTovarOkClick_ShouldShowError_WhenProductNameExists()
        {
            ListPr.ListProd.Add(new Product { nameProd = "Existing Product" });
            
            _addTovar.GetNameTov.Text = "Existing Product";
            _addTovar.AddTovarOk_Click(null, null);

            Assert.That(ListPr.ListProd.Count, Is.EqualTo(1));
            Assert.That(_addTovar.GetErrorMsg.Text, Is.EqualTo("Товар с таким именем уже имеется в каталоге"));
        }

        [Test]
        public void AddTovarOkClick_ShouldAddProduct_WhenImageNotSelected()
        {
            _addTovar.GetNameTov.Text = "Product Without Image";
            _addTovar.GetPriceTov.Text = "200";
            _addTovar.GetQuantityTov.Text = "20";
            _addTovar.bitmapToBind = null;

            _addTovar.AddTovarOk_Click(null, null);

            Assert.That(ListPr.ListProd[0].nameProd, Is.EqualTo("Product Without Image"));
            Assert.That(ListPr.ListProd[0].bitmapProd, Is.Null);
        }

        [Test]
        public void AddTovarOkClick_ShouldHandleInvalidNumberFormat_WhenFieldsIsInvalid()
        {
            _addTovar.GetNameTov.Text = "Invalid Input Product";
            _addTovar.GetPriceTov.Text = "invalid";
            _addTovar.GetQuantityTov.Text = "invalid";

            Assert.DoesNotThrow(() => _addTovar.AddTovarOk_Click(null, null));
        }

        [Test]
        public void AddTovarImgClick_ShouldUpdateImage_WhenFileSelected()
        {
            var testBitmap = new Bitmap(Path.Combine("Assets", "test_image.png"));
            _addTovar.bitmapToBind = testBitmap;

            _addTovar.AddTovarImg_Click(null, null);

            Assert.That(_addTovar.GetImagePath.Source, Is.EqualTo(testBitmap));
        }
        
        [Test]
        public void AddTovarOkClick_ShouldIncrementIdCounter_WhenFieldsIsValid()
        {
            var initialCounter = ListPr.b;
            
            _addTovar.GetNameTov.Text = "Product 1";
            _addTovar.GetPriceTov.Text = "100";
            _addTovar.GetQuantityTov.Text = "10";
            _addTovar.AddTovarOk_Click(null, null);

            _addTovar.GetNameTov.Text = "Product 2";
            _addTovar.AddTovarOk_Click(null, null);

            Assert.That(ListPr.ListProd[0].Id, Is.EqualTo(initialCounter));
            Assert.That(ListPr.ListProd[1].Id, Is.EqualTo(initialCounter + 1));
        }
        
        [Test]
        public void AddTovarOkClick_ShouldHandleEmptyFields_WhenFieldsIsEmpty()
        {
            _addTovar.GetNameTov.Text = "";
            _addTovar.GetPriceTov.Text = "";
            _addTovar.GetQuantityTov.Text = "";

            Assert.DoesNotThrow(() => _addTovar.AddTovarOk_Click(null, null));
        }

        [Test]
        public void AddTovarOkClick_ShouldCloseWindow_WhenSuccessful()
        {
            _addTovar.GetNameTov.Text = "Test Close";
            _addTovar.GetPriceTov.Text = "100";
            _addTovar.GetQuantityTov.Text = "10";

            _addTovar.AddTovarOk_Click(null, null);

            Assert.That(AddTovar.IsOpen, Is.False);
        }
        
        [Test]
        public void AddTovarOkClick_ShouldOpenProductEdit_WhenSuccessful()
        {
            _addTovar.GetNameTov.Text = "Test Open Edit";
            _addTovar.GetPriceTov.Text = "100";
            _addTovar.GetQuantityTov.Text = "10";

            _addTovar.AddTovarOk_Click(null, null);

            Assert.That(ProductEdit.IsOpen, Is.True);
        }
    }
}