using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Storage;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;

namespace Tadv01
{
    //inherits from Sprite.cs
    class Tad : Sprite
    {
        //Tad's Constants
        const string TAD_ASSETNAME = "Tad";
        const int START_POSITION_X = 125;
        const int START_POSITION_Y = 245;
        const int TAD_SPEED = 160;
        const int MOVE_UP = -1;
        const int MOVE_DOWN = 1;
        const int MOVE_LEFT = -1;
        const int MOVE_RIGHT = 1;

        //State storage
        enum State
        {
            Walking
        }
        State mCurrentState = State.Walking;

        //direction storage
        Vector2 mDirection = Vector2.Zero;
        //speed storage
        Vector2 mSpeed = Vector2.Zero;

     // Initializing it give you a blank KeyboardState with all keys unpressed - useful for keypresses on first update
     KeyboardState mPreviousKeyboardState = new KeyboardState();
     GamePadState mPreviousGamePadState = new GamePadState();

        public void LoadContent(ContentManager theContentManager)
        {
            Position = new Vector2(START_POSITION_X, START_POSITION_X);
            base.LoadContent(theContentManager, TAD_ASSETNAME);
        }

        public void Update(GameTime theGameTime)
        {
            //update keyboard state
            KeyboardState aCurrentKeyboardState = Keyboard.GetState();
            //update gamepadstate
            GamePadState aCurrentGamepadState = GamePad.GetState(PlayerIndex.One);
            UpdateMovement(aCurrentKeyboardState, aCurrentGamepadState);
            mPreviousKeyboardState = aCurrentKeyboardState;
            mPreviousGamePadState = aCurrentGamepadState;

            base.Update(theGameTime, mSpeed, mDirection);
        }

        private void UpdateMovement(KeyboardState aCurrentKeyboardState,
            GamePadState aCurrentGamepadState)
        {
            if (mCurrentState == State.Walking)
            {
                mSpeed = Vector2.Zero;
                mDirection = Vector2.Zero;

                // Updated to check the left thumbstick, right thumbstick, and Dpad
                if ((aCurrentKeyboardState.IsKeyDown(Keys.Left) == true) ||
                    (aCurrentGamepadState.ThumbSticks.Left.X < 0.0f) ||
                    (aCurrentGamepadState.ThumbSticks.Right.X < 0.0f) ||
                    (aCurrentGamePadState.IsButtonDown(Buttons.DPadLeft))
                {
                    mSpeed.X = TAD_SPEED;
                    mDirection.X = MOVE_LEFT;
                }
                else if ((aCurrentKeyboardState.IsKeyDown(Keys.Right) == true) ||
                    (aCurrentGamepadState.ThumbSticks.Left.X > 0.0f) ||
                    (aCurrentGamepadState.ThumbSticks.Right.X > 0.0f) ||
                    (aCurrentGamePadState.IsButtonDown(Buttons.DPadRight))
                {
                    mSpeed.X = TAD_SPEED;
                    mDirection.X = MOVE_RIGHT;
                }

                if ((aCurrentKeyboardState.IsKeyDown(Keys.Up) == true) ||
                    (aCurrentGamepadState.ThumbSticks.Left.Y > 0.0f) ||
                    (aCurrentGamepadState.ThumbSticks.Right.Y > 0.0f) ||
                    (aCurrentGamePadState.IsButtonDown(Buttons.DPadUp))
                {
                    mSpeed.Y = TAD_SPEED;
                    mDirection.Y = MOVE_UP;
                }
                else if ((aCurrentKeyboardState.IsKeyDown(Keys.Down) == true) ||
                    (aCurrentGamepadState.ThumbSticks.Left.Y < 0.0f) ||
                    (aCurrentGamepadState.ThumbSticks.Right.Y < 0.0f) ||
                    (aCurrentGamePadState.IsButtonDown(Buttons.DPadDown))
                {
                    mSpeed.Y = TAD_SPEED;
                    mDirection.Y = MOVE_DOWN;
                }
            }
        }

    }
}