using System.Drawing;
using Lithnet.CredentialProvider;
using Xunit;

namespace SGU.CredentialProvider.Tests;

public sealed class ProviderTileIconTests
{
    [Fact]
    public void ProviderPublishesAHighResolutionLogoForSignInOptions()
    {
        SguCredentialProvider provider = new();

        CredentialProviderLogoControl logo = Assert.Single(
            provider.GetControls(UsageScenario.Logon).OfType<CredentialProviderLogoControl>());

        Assert.Equal(ProviderTileIcon.Size, logo.Bitmap.Width);
        Assert.Equal(ProviderTileIcon.Size, logo.Bitmap.Height);
        Assert.Equal(0, logo.Bitmap.GetPixel(0, 0).A);
        Assert.Equal(0, logo.Bitmap.GetPixel(ProviderTileIcon.Size - 1, 0).A);
        Assert.Equal(0, logo.Bitmap.GetPixel(0, ProviderTileIcon.Size - 1).A);
        Assert.Equal(0, logo.Bitmap.GetPixel(ProviderTileIcon.Size - 1, ProviderTileIcon.Size - 1).A);
        int redPixels = 0;
        int navyPixels = 0;
        for (int x = 0; x < logo.Bitmap.Width; x++)
        {
            for (int y = 0; y < logo.Bitmap.Height; y++)
            {
                Color pixel = logo.Bitmap.GetPixel(x, y);
                if (pixel.R > 160 && pixel.G < 100 && pixel.B < 100)
                {
                    redPixels++;
                }

                if (pixel.B > pixel.R && pixel.B > pixel.G && pixel.R < 70)
                {
                    navyPixels++;
                }
            }
        }

        Assert.InRange(redPixels, 1_000, 30_000);
        Assert.InRange(navyPixels, 1_000, 50_000);
    }

    [Fact]
    public void ProviderPublishesASingleBrandedImageAndLargeHeading()
    {
        SguCredentialProvider provider = new();
        ControlBase[] controls = provider.GetControls(UsageScenario.Logon).ToArray();

        Assert.Empty(controls.OfType<UserTileControl>());
        Assert.Single(controls.OfType<CredentialProviderLogoControl>());
        CredentialProviderLabelControl providerLabel = Assert.Single(controls.OfType<CredentialProviderLabelControl>());
        LargeLabelControl heading = Assert.Single(controls.OfType<LargeLabelControl>());
        SguCredentialTile tile = Assert.IsType<SguCredentialTile>(provider.CreateGenericTile());

        Assert.Equal("La Salle · Acceso SGU", providerLabel.Label);
        Assert.Equal("Acceso institucional SGU", heading.Label);
        Assert.Equal(FieldState.DisplayInSelectedTile, heading.State);
        Assert.Equal(GenericTileDisplayMode.DisplayAsDedicatedTile, tile.GenericTileDisplayMode);
        Assert.IsAssignableFrom<CredentialTile3>(tile);
    }
}