using VoxelEngine.World;
using VoxelEngine.World.Blocks;
using Xunit;

namespace VoxelEngine.Tests;

public class BlockRegistryTests
{
    [Fact]
    public void Get_ReturnsRegisteredBlockById()
    {
        var registry = new BlockRegistry();

        Assert.IsType<AirBlock>(registry.Get(0));
        Assert.IsType<StoneBlock>(registry.Get(1));
        Assert.IsType<DirtBlock>(registry.Get(2));
        Assert.IsType<GrassBlock>(registry.Get(3));
    }

    [Fact]
    public void Air_IsNotOpaqueOrSolid_OthersAre()
    {
        var registry = new BlockRegistry();

        Assert.False(registry.Get(0).IsOpaque);
        Assert.False(registry.Get(0).IsSolid);
        Assert.True(registry.Get(1).IsOpaque);
        Assert.True(registry.Get(1).IsSolid);
    }

    [Fact]
    public void Grass_HasDifferentTexturesPerFace()
    {
        var registry = new BlockRegistry();
        IBlock grass = registry.Get(3);

        Assert.Equal(new TileCoord(0, 1), grass.GetTextureTile(BlockFace.Top));
        Assert.Equal(new TileCoord(0, 0), grass.GetTextureTile(BlockFace.Bottom));
        Assert.Equal(new TileCoord(1, 1), grass.GetTextureTile(BlockFace.North));
    }

    [Fact]
    public void NamedAccessors_MatchIds()
    {
        var registry = new BlockRegistry();

        Assert.Equal((ushort)0, registry.Air.Id);
        Assert.Equal((ushort)1, registry.Stone.Id);
        Assert.Equal((ushort)2, registry.Dirt.Id);
        Assert.Equal((ushort)3, registry.Grass.Id);
    }
}