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

namespace SGU.CredentialProvider.Tests;

public sealed class ProviderTileIconTests
{
    [Fact]
    public void ProviderPublishesASeventyTwoPixelLogoForSignInOptions()
    {
        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(Color.FromArgb(0, 83, 155).ToArgb(), logo.Bitmap.GetPixel(0, 0).ToArgb());
        int lightPixels = 0;
        for (int x = 0; x < logo.Bitmap.Width; x++)
        {
            for (int y = 0; y < logo.Bitmap.Height; y++)
            {
                if (logo.Bitmap.GetPixel(x, y).GetBrightness() > 0.7f)
                {
                    lightPixels++;
                }
            }
        }

        Assert.InRange(lightPixels, 200, 2_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>());
        LargeLabelControl heading = Assert.Single(controls.OfType<LargeLabelControl>());
        SguCredentialTile tile = Assert.IsType<SguCredentialTile>(provider.CreateGenericTile());

        Assert.Equal("Acceso institucional SGU", heading.Label);
        Assert.Equal(FieldState.DisplayInBoth, heading.State);
        Assert.Equal(GenericTileDisplayMode.DisplayAsDedicatedTile, tile.GenericTileDisplayMode);
    }
}