using System.IO;
using System.Threading.Tasks;
using MalwareMultiScan.Api.Controllers;
using MalwareMultiScan.Api.Data.Models;
using MalwareMultiScan.Api.Services.Interfaces;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Moq;
using NUnit.Framework;

namespace MalwareMultiScan.Tests
{
    public class ControllersTests
    {
        private DownloadController _downloadController;
        private QueueController _queueController;
        private ScanResultsController _scanResultsController;
        private Mock<IScanResultService> _scanResultServiceMock;
        
        [SetUp]
        public void SetUp()
        {
            _scanResultServiceMock = new Mock<IScanResultService>();

            _scanResultServiceMock
                .Setup(x => x.ObtainFile("existing"))
                .Returns(Task.FromResult(new MemoryStream() as Stream));
            
            _scanResultServiceMock
                .Setup(x => x.ObtainFile("non-existing"))
                .Returns(Task.FromResult((Stream) null));

            _scanResultServiceMock
                .Setup(x => x.GetScanResult("existing"))
                .Returns(Task.FromResult(new ScanResult
                {
                    Id = "existing"
                }));
            
            _scanResultServiceMock
                .Setup(x => x.GetScanResult("non-existing"))
                .Returns(Task.FromResult((ScanResult) null));
            
            _scanResultServiceMock
                .Setup(x => x.ObtainFile("non-existing"))
                .Returns(Task.FromResult((Stream) null));
            
            _scanResultServiceMock
                .Setup(x => x.CreateScanResult())
                .Returns(Task.FromResult(new ScanResult()));

            _downloadController = new DownloadController(_scanResultServiceMock.Object);
            _scanResultsController = new ScanResultsController(_scanResultServiceMock.Object);
            
            _queueController = new QueueController(_scanResultServiceMock.Object)
            {
                Url = Mock.Of<IUrlHelper>()
            };
        }

        [Test]
        public async Task TestFileDownload()
        {
            Assert.True(await _downloadController.Index("existing") is FileStreamResult);
            Assert.True(await _downloadController.Index("non-existing") is NotFoundResult);
        }

        [Test]
        public async Task TestScanResults()
        {
            Assert.True(
                await _scanResultsController.Index("existing") is OkObjectResult okObjectResult &&
                okObjectResult.Value is ScanResult scanResult && scanResult.Id == "existing");
            
            Assert.True(await _scanResultsController.Index("non-existing") is NotFoundResult);
        }

        [Test]
        public async Task TestFileQueue()
        {
            Assert.True(await _queueController.ScanFile(
                Mock.Of<IFormFile>(x =>
                    x.FileName == "test.exe" &&
                    x.OpenReadStream() == new MemoryStream())
            ) is CreatedAtActionResult);

            _scanResultServiceMock.Verify(
                x => x.StoreFile("test.exe", It.IsAny<Stream>()), Times.Once);
            
            _scanResultServiceMock.Verify(
                x => x.QueueUrlScan(It.IsAny<ScanResult>(), It.IsAny<string>()), Times.Once);
        }
        
        [Test]
        public async Task TestUrlQueue()
        {
            Assert.True(await _queueController.ScanUrl("http://test.com") is CreatedAtActionResult);
            
            _scanResultServiceMock.Verify(
                x => x.QueueUrlScan(It.IsAny<ScanResult>(), "http://test.com"), Times.Once);
        }
    }
}