using Microsoft.Xna.Framework.Input;
using MrGameEng.Input;
using Xunit;

namespace MrGameEng.Input.Tests;

public class ActionMapTests
{
    private enum GameAction
    {
        Jump,
        MoveLeft,
        MoveRight,
    }

    private static void Frame(InputManager input, params Keys[] keys) =>
        input.Apply(new KeyboardState(keys), default, GamePadState.Default);

    [Fact]
    public void IsDown_TrueWhenAnyBindingIsHeld()
    {
        var input = new InputManager();
        var map = new ActionMap<GameAction>(input)
            .Bind(GameAction.Jump, Keys.Space)
            .Bind(GameAction.Jump, Keys.W);

        Frame(input, Keys.W);

        Assert.True(map.IsDown(GameAction.Jump));
    }

    [Fact]
    public void IsPressed_EdgeTriggered()
    {
        var input = new InputManager();
        var map = new ActionMap<GameAction>(input).Bind(GameAction.Jump, Keys.Space);

        Frame(input, Keys.Space);
        Assert.True(map.IsPressed(GameAction.Jump));

        Frame(input, Keys.Space);
        Assert.False(map.IsPressed(GameAction.Jump));
        Assert.True(map.IsDown(GameAction.Jump));
    }

    [Fact]
    public void Unbind_RemovesAllBindings()
    {
        var input = new InputManager();
        var map = new ActionMap<GameAction>(input).Bind(GameAction.Jump, Keys.Space);

        map.Unbind(GameAction.Jump);
        Frame(input, Keys.Space);

        Assert.False(map.IsDown(GameAction.Jump));
    }

    [Fact]
    public void GetAxis_CombinesTwoActions()
    {
        var input = new InputManager();
        var map = new ActionMap<GameAction>(input)
            .Bind(GameAction.MoveLeft, Keys.A)
            .Bind(GameAction.MoveRight, Keys.D);

        Frame(input, Keys.A);
        Assert.Equal(-1f, map.GetAxis(GameAction.MoveLeft, GameAction.MoveRight));

        Frame(input, Keys.A, Keys.D);
        Assert.Equal(0f, map.GetAxis(GameAction.MoveLeft, GameAction.MoveRight));

        Frame(input, Keys.D);
        Assert.Equal(1f, map.GetAxis(GameAction.MoveLeft, GameAction.MoveRight));
    }
}