using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;
using Microsoft.Xna.Framework.Net;
using Microsoft.Xna.Framework.Storage;

namespace STGED.STGEngine
{
    public class InputManager : Microsoft.Xna.Framework.GameComponent
    {
        // Current input states
        public static GamePadState currentGPState = GamePad.GetState(PlayerIndex.One);
        public static KeyboardState currentKBState = Keyboard.GetState();

        // Previous input states
        public static GamePadState previousGPState;
        public static KeyboardState previousKBState;

        public override void Initialize()
        {
            previousGPState = GamePad.GetState(PlayerIndex.One);
            previousKBState = Keyboard.GetState();

            base.Initialize();
        }

        #region GamePad
        public static bool ButtonPush(Buttons button)
        {
            return (currentGPState.IsConnected && previousGPState.IsConnected && currentGPState.IsButtonDown(button) && previousGPState.IsButtonUp(button));
        }

        public static bool ButtonPull(Buttons button)
        {
            return (currentGPState.IsConnected && previousGPState.IsConnected && currentGPState.IsButtonUp(button) && previousGPState.IsButtonDown(button));
        }

        public static bool ButtonHold(Buttons button)
        {
            return (currentGPState.IsConnected && previousGPState.IsConnected && currentGPState.IsButtonDown(button) && previousGPState.IsButtonDown(button));
        }

        public static bool ButtonFree(Buttons button)
        {
            return (currentGPState.IsConnected && previousGPState.IsConnected && currentGPState.IsButtonUp(button) && previousGPState.IsButtonUp(button));
        }
        #endregion

        #region Keyboard
        public static bool KeyPush(Keys key)
        {
            return (currentKBState.IsKeyDown(key) && previousKBState.IsKeyUp(key));
        }

        public static bool KeyPull(Keys key)
        {
            return (currentKBState.IsKeyUp(key) && previousKBState.IsKeyDown(key));
        }

        public static bool KeyHold(Keys key)
        {
            return (currentKBState.IsKeyDown(key) && previousKBState.IsKeyDown(key));
        }

        public static bool KeyFree(Keys key)
        {
            return (currentKBState.IsKeyUp(key) && previousKBState.IsKeyUp(key));
        }
        #endregion

        #region Virtual keyboard
        public static bool VKPush(VirtualKey VK)
        {
            return (ButtonPush(VK.Button) || KeyPush(VK.Key));
        }

        public static bool VKPull(VirtualKey VK)
        {
            return (ButtonPull(VK.Button) || KeyPull(VK.Key));
        }

        public static bool VKHold(VirtualKey VK)
        {
            return (ButtonHold(VK.Button) || KeyHold(VK.Key));
        }

        public static bool VKFree(VirtualKey VK)
        {
            return (ButtonFree(VK.Button) || KeyFree(VK.Key));
        }
        #endregion

        public override void Update(GameTime gameTime)
        {
            previousGPState = currentGPState;
            previousKBState = currentKBState;

            currentGPState = GamePad.GetState(PlayerIndex.One);
            currentKBState = Keyboard.GetState();

            base.Update(gameTime);
        }
    }
}