using Infrastructure.FileSystem;
using Microsoft.AspNetCore.Hosting;
using System.IO;
using Xunit;
using Moq;

namespace IntegrationTests.Infrastructure.File
{
public class LocalFileImageServiceGetImageBytesById
{
    private byte[] _testBytes = new byte[] { 0x01, 0x02, 0x03 };
    private readonly Mock<IHostingEnvironment> _mockEnvironment = new Mock<IHostingEnvironment>();
    private int _testImageId = 123;
    private string _testFileName = "123.png";

    public LocalFileImageServiceGetImageBytesById()
    {
        // create folder if necessary
        Directory.CreateDirectory(Path.Combine(GetFileDirectory(), "Pics"));

        string filePath = GetFilePath(_testFileName);
        System.IO.File.WriteAllBytes(filePath, _testBytes);
        _mockEnvironment.SetupGet<string>(m => m.ContentRootPath).Returns(GetFileDirectory());
    }

    private string GetFilePath(string fileName)
    {
        return Path.Combine(GetFileDirectory(), "Pics", fileName);
    }

    private string GetFileDirectory()
    {
        var location = System.Reflection.Assembly.GetEntryAssembly().Location;
        return Path.GetDirectoryName(location);
    }

    [Fact]
    public void ReturnsFileContentResultGivenValidId()
    {
        var fileService = new LocalFileImageService(_mockEnvironment.Object);

        var result = fileService.GetImageBytesById(_testImageId);

        Assert.Equal(_testBytes, result);
    }
}
}