using System.Collections.Generic;
using UnityEngine;

public class In : MonoBehaviour
{
    [Header("Выбор источника управления")]

    static InputSource source;

    public void Initialize()
    {
#if UNITY_EDITOR
        source = new KeyboardInput();
#else
        source = new COMinput();
#endif

        var success = source.Initialize();
        if (!success) Debug.LogWarning("Не удалось проинициалзировать источник управления.");
    }

    /// <summary>Возвращает горизонтальную и вертикальную оси выбранного джойстика.</summary>
    public static Vector2Int GetAxis(JoystickSide side, InteractMode interactMode = InteractMode.Discrete)
    {
        if (side == JoystickSide.Both)
        {
            int horizontal = ToAxis(
                IsActive(InSignal.left1, interactMode) || IsActive(InSignal.left2, interactMode),
                IsActive(InSignal.right1, interactMode) || IsActive(InSignal.right2, interactMode));
            int vertical = ToAxis(
                IsActive(InSignal.down1, interactMode) || IsActive(InSignal.down2, interactMode),
                IsActive(InSignal.up1, interactMode) || IsActive(InSignal.up2, interactMode));

            return new Vector2Int(horizontal, vertical);
        }

        bool isLeft = side == JoystickSide.Left;
        InSignal left = isLeft ? InSignal.left1 : InSignal.left2;
        InSignal right = isLeft ? InSignal.right1 : InSignal.right2;
        InSignal down = isLeft ? InSignal.down1 : InSignal.down2;
        InSignal up = isLeft ? InSignal.up1 : InSignal.up2;

        return new Vector2Int(
            ToAxis(IsActive(left, interactMode), IsActive(right, interactMode)),
            ToAxis(IsActive(down, interactMode), IsActive(up, interactMode)));
    }

    /// <summary>Возвращает состояние кнопки Action выбранного джойстика.</summary>
    public static bool GetAction(JoystickSide side, InteractMode interactMode = InteractMode.Discrete)
    {
        if (side == JoystickSide.Both)
            return IsActive(InSignal.action1, interactMode) || IsActive(InSignal.action2, interactMode);

        InSignal action = side == JoystickSide.Left ? InSignal.action1 : InSignal.action2;
        return IsActive(action, interactMode);
    }

    /// <summary>Возвращает текущее состояние сервисной кнопки без обработки Up/Down.</summary>
    public static bool GetService() => GetButton(InSignal.service);


    public static bool GetButton(InSignal button) => source.GetButton(button);

    public static bool GetButtonDown(InSignal button) => source.GetButtonDown(button);

    public static bool GetButtonDown(IEnumerable<InSignal> signals)
    {
        foreach (var signal in signals)
            if (GetButtonDown(signal))
                return true;

        return false;
    }

    public static bool AnyButton() => source.AnyButton();

    private static bool IsActive(InSignal signal, InteractMode interactMode)
        => interactMode == InteractMode.Discrete ? GetButtonDown(signal) : GetButton(signal);

    private static int ToAxis(bool negative, bool positive)
        => (positive ? 1 : 0) - (negative ? 1 : 0);
}

public enum Axis
{
    Horizontal,
    Vertical
}

public enum JoystickSide
{
    Left,
    Right,
    Both
}

public enum InteractMode
{
    Discrete,
    Continious
}