using System; 
using System.Timers;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Input;
using Input = Microsoft.Xna.Framework.Input;// to provide shorthand to clear up ambiguities

namespace LegoControl
{
    public class XInput
    {
        
        Timer updateTimer;
        GamePadState gamePadState;
        GamePadState previousState;
        PlayerIndex playerIndex = PlayerIndex.One;
        int vibrationCountdown = 0;

        public bool Connected { get { return gamePadState.IsConnected;} }
        public double UpdateInterval { get; set; }

        public bool A { get; set; }
        public bool B { get; set; }
        public bool X { get; set; }
        public bool Y { get; set; }
        public bool LeftShoulder { get; set; }
        public bool RightShoulder { get; set; }
        public bool Start { get; set; }
        public bool Back { get; set; }
        public bool LeftStickPressed { get; set; }
        public bool RightStickPressed { get; set; }
        public bool Up { get; set; }
        public bool Down { get; set; }
        public bool Left { get; set; }
        public bool Right { get; set; }

        public int LeftThumbX { get; set; }
        public int LeftThumbY { get; set; }
        public int RightThumbX { get; set; }
        public int RightThumbY { get; set; }
        public int LeftTrigger { get; set; }
        public int RightTrigger { get; set; }
        

        public XInput(){
            gamePadState = GamePad.GetState(playerIndex);
            UpdateInterval = 50;
            updateTimer = new Timer(UpdateInterval);
            updateTimer.Elapsed += new ElapsedEventHandler(updateTimer_Elapsed);
           
        }

        private void SelectedIndexChanged(int index)
        {
            switch (index)
            {
                case 0: playerIndex = PlayerIndex.One; break;
                case 1: playerIndex = PlayerIndex.Two; break;
                case 2: playerIndex = PlayerIndex.Three; break;
                case 3: playerIndex = PlayerIndex.Four; break;
                default: playerIndex = PlayerIndex.One; break;
            }
            this.StopAllVibration();

        }

        private void StopAllVibration()
        {
            GamePad.SetVibration(PlayerIndex.One, 0.0f, 0.0f);
            GamePad.SetVibration(PlayerIndex.Two, 0.0f, 0.0f);
            GamePad.SetVibration(PlayerIndex.Three, 0.0f, 0.0f);
            GamePad.SetVibration(PlayerIndex.Four, 0.0f, 0.0f);

        }

        private void Vibration(float amount)
        {
            GamePad.SetVibration(playerIndex, amount, amount);
            vibrationCountdown = 30;
            

        }

        private void CheckVibrationTimeout()
        {
            if (vibrationCountdown > 0)
            {
                --vibrationCountdown;
                if (vibrationCountdown == 0.0f)
                {
                    GamePad.SetVibration(playerIndex, 0.0f, 0.0f);
                }
            }

        }

        private void UpdateControllerState()
        {
            this.previousState = this.gamePadState;
            this.gamePadState = GamePad.GetState(this.playerIndex);

            if (!this.gamePadState.Buttons.Equals(this.previousState.Buttons))
            {
                this.A = (this.gamePadState.Buttons.A == Input.ButtonState.Pressed);
                this.B = (this.gamePadState.Buttons.B == Input.ButtonState.Pressed);
                this.X = (this.gamePadState.Buttons.X == Input.ButtonState.Pressed);
                this.Y = (this.gamePadState.Buttons.Y == Input.ButtonState.Pressed);
                this.LeftShoulder = (this.gamePadState.Buttons.LeftShoulder == Input.ButtonState.Pressed);
                this.RightShoulder = (this.gamePadState.Buttons.RightShoulder == Input.ButtonState.Pressed);
                this.Start = (this.gamePadState.Buttons.Start == Input.ButtonState.Pressed);
                this.Back = (this.gamePadState.Buttons.Back == Input.ButtonState.Pressed);
                this.LeftStickPressed = (this.gamePadState.Buttons.LeftStick == Input.ButtonState.Pressed);
                this.RightStickPressed = (this.gamePadState.Buttons.RightStick == Input.ButtonState.Pressed);
           }
            
           if (!this.gamePadState.DPad.Equals(this.previousState.DPad))
           {
                this.Up = (this.gamePadState.DPad.Up == Input.ButtonState.Pressed);
                this.Down = (this.gamePadState.DPad.Down == Input.ButtonState.Pressed);
                this.Left = (this.gamePadState.DPad.Left == Input.ButtonState.Pressed);
                this.Right = (this.gamePadState.DPad.Right == Input.ButtonState.Pressed);                
           }

            this.LeftThumbX = (int)((this.gamePadState.ThumbSticks.Left.X) * 100.0f);
            this.LeftThumbY = (int)((this.gamePadState.ThumbSticks.Left.Y) * 100.0f);
            this.RightThumbX = (int)((this.gamePadState.ThumbSticks.Right.X) * 100.0f);
            this.RightThumbY = (int)((this.gamePadState.ThumbSticks.Right.Y) * 100.0f);


            //The triggers return a value between 0.0 and 1.0.
            this.LeftTrigger = (int)((this.gamePadState.Triggers.Left * 100f));
            this.RightTrigger = (int)(this.gamePadState.Triggers.Right * 100f);

       }

        private void updateTimer_Elapsed(object sender, EventArgs e)
        {
            this.CheckVibrationTimeout();
            this.UpdateControllerState();
        }

        public void StartController()
        {
            this.updateTimer.Start();
        }

        public void StopController()
        {
            this.StopAllVibration();
        }
    }
}