using Microsoft.AspNetCore.Mvc;
using Microsoft.eShopOnContainers.WebMVC.Controllers;
using Microsoft.eShopOnContainers.WebMVC.Services;
using Microsoft.eShopOnContainers.WebMVC.ViewModels;
using Microsoft.eShopOnContainers.WebMVC.ViewModels.CatalogViewModels;
using Moq;
using System.Collections.Generic;
using System.Threading.Tasks;
using Xunit;
using CatalogModel = Microsoft.eShopOnContainers.WebMVC.ViewModels.Catalog;

namespace UnitTest.Catalog.Application
{
    public class CatalogControllerTest
    {
        private readonly Mock<ICatalogService> _catalogServiceMock;

        public CatalogControllerTest()
        {
            _catalogServiceMock = new Mock<ICatalogService>();
        }

        [Fact]
        public async Task Get_catalog_items_success()
        {
            //Arrange
            var fakeBrandFilterApplied = 1;
            var fakeTypesFilterApplied = 2;
            var fakePage = 2;
            var fakeCatalog = GetFakeCatalog();

            var expectedNumberOfPages = 5;
            var expectedTotalPages = 50;
            var expectedCurrentPage = 2;

            _catalogServiceMock.Setup(x => x.GetCatalogItems
            (
                It.Is<int>(y => y == fakePage),
                It.IsAny<int>(),
                It.Is<int?>(y => y == fakeBrandFilterApplied),
                It.Is<int?>(y => y == fakeTypesFilterApplied)
             ))
             .Returns(Task.FromResult(fakeCatalog));

            //Act
            var orderController = new CatalogController(_catalogServiceMock.Object);
            var actionResult = await orderController.Index(fakeBrandFilterApplied, fakeTypesFilterApplied, fakePage, null);

            //Assert
            var viewResult = Assert.IsType<ViewResult>(actionResult);
            var model = Assert.IsAssignableFrom<IndexViewModel>(viewResult.ViewData.Model);
            Assert.Equal(model.PaginationInfo.TotalPages, expectedNumberOfPages);
            Assert.Equal(model.PaginationInfo.TotalItems, expectedTotalPages);
            Assert.Equal(model.PaginationInfo.ActualPage, expectedCurrentPage);
            Assert.Empty(model.PaginationInfo.Next);
            Assert.Empty(model.PaginationInfo.Previous);
        }   
        
        private CatalogModel GetFakeCatalog()
        {
            return new CatalogModel()
            {
                PageSize = 10,
                Count = 50,
                PageIndex = 2,
                Data = new List<CatalogItem>()
                {
                    new CatalogItem()
                    {
                        Id = 1,
                        Name = "fakeItemA",
                        CatalogTypeId = 1
                    },
                    new CatalogItem()
                    {
                        Id = 2,
                        Name = "fakeItemB",
                        CatalogTypeId = 1
                    },
                    new CatalogItem()
                    {
                        Id = 3,
                        Name = "fakeItemC",
                        CatalogTypeId = 1
                    }
                }
            };
        }
    }
}