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;

namespace Follow
{

    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        SpriteFont MainText;
        Texture2D Player;
        Texture2D Enemy;
        Vector2 playerPosition;
        Vector2 enemyPosition;
        Rectangle enemyBound;
        Rectangle playerBound;

        bool moveableright = true;
        bool moveableleft = true;
        bool moveabledown = true;
        bool moveableup = true;
        bool spacerespond = true;
        bool spaceinstrucshow = true;
        bool enterinstrucshow = false;
        bool moveable = false;
        bool followinstrucshow = false;
        bool fpressable = false;
        bool rectanglefollow = false;
        bool tryagainshow = false;
        bool epressable = false;

        int n = 1;
        int listcount = 0;

        List<float> xMovement = new List<float>();
        List<float> yMovement = new List<float>();

        Random EnemyStartPos = new Random();



        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }

        protected override void Initialize()
        {
            // TODO: Add your initialization logic here
            playerPosition = new Vector2(130, 30);
            enemyPosition = new Vector2(20, 30);

            base.Initialize();
        }

        protected override void LoadContent()
        {
            // Create a new SpriteBatch, which can be used to draw textures.
            spriteBatch = new SpriteBatch(GraphicsDevice);

            // TODO: use this.Content to load your game content here
            Player = Content.Load<Texture2D>("Player");
            Enemy = Content.Load<Texture2D>("block");

            playerBound = new Rectangle((int)playerPosition.X, (int)playerPosition.Y, Player.Width, Player.Height);
            enemyBound = new Rectangle((int)enemyPosition.X, (int)enemyPosition.Y, Enemy.Width, Enemy.Height);

            MainText = Content.Load<SpriteFont>("MainFont");

        }



        protected override void UnloadContent()
        {
            // TODO: Unload any non ContentManager content here
        }


        protected override void Update(GameTime gameTime)
        {
            // Allows the game to exit
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();

            KeyboardState keyboardState = Keyboard.GetState();
            enemyBound.X = (int)enemyPosition.X;
            enemyBound.Y = (int)enemyPosition.Y;

            playerBound.X = (int)playerPosition.X;
            playerBound.Y = (int)playerPosition.Y;



            if (keyboardState.IsKeyDown(Keys.Space) && spacerespond ==true)
            {
                moveable = true;
                spaceinstrucshow = false;
                enterinstrucshow = true;
                spacerespond = false;

            }

            if (keyboardState.IsKeyDown(Keys.Enter) && spaceinstrucshow == false)
            {
                moveable = false;
                enterinstrucshow = false;
                followinstrucshow = true;
                fpressable = true;
            }

            if (keyboardState.IsKeyDown(Keys.F) && fpressable == true)
            {
                rectanglefollow = true;
                followinstrucshow = false;
            }

            if (keyboardState.IsKeyDown(Keys.E) && fpressable == true)
            {
                xMovement.Clear();
                yMovement.Clear();
                moveableright = true;
                moveableleft = true;
                moveabledown = true;
                moveableup = true;
                spacerespond = true;
                spaceinstrucshow = true;
                enterinstrucshow = false;
                moveable = false;
                followinstrucshow = false;
                fpressable = false;
                rectanglefollow = false;
                tryagainshow = false;
                epressable = false;
                playerPosition.X = 130;
                playerPosition.Y = 30;
                enemyPosition.X = 20;
                enemyPosition.Y = 30;
                n = 1;
                listcount = 0;
            }


            if (moveable == true)
            {
                if (playerPosition.X > 760)
                {
                    moveableright = false;
                }

                if (playerPosition.X < 5)
                {
                    moveableleft = false;
                }

                if (playerPosition.Y > 439)
                {
                    moveabledown = false;
                }

                if (playerPosition.Y < 5)
                {
                    moveableup = false;
                }

                if (keyboardState.IsKeyDown(Keys.W) && moveableup == true)
                {
                    playerPosition.Y -= 3;
                }

                if (keyboardState.IsKeyDown(Keys.S) && moveabledown == true)
                {
                    playerPosition.Y += 3;
                }

                if (keyboardState.IsKeyDown(Keys.A) && moveableleft == true)
                {
                    playerPosition.X -= 3;
                }

                if (keyboardState.IsKeyDown(Keys.D) && moveableright == true)
                {
                    playerPosition.X += 3;
                }

                xMovement.Add(playerPosition.X);
                yMovement.Add(playerPosition.Y);
                listcount++;
            }

            if (rectanglefollow == true)
            {
                if (n < listcount)
                {
                    enemyPosition.X = xMovement[n] - 110;
                    enemyPosition.Y = yMovement[n];
                    n++;
                }

                else
                {
                    rectanglefollow = false;
                    tryagainshow = true;
                    epressable = true;
                }

            }

            moveableright = true;
            moveableleft = true;
            moveabledown = true;
            moveableup = true;

            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.Yellow);

            // TODO: Add your drawing code here
            spriteBatch.Begin();
            spriteBatch.Draw(Player, playerPosition, Color.White);
            spriteBatch.Draw(Enemy, enemyPosition, Color.White);

            if (spaceinstrucshow == true)
            {
                spriteBatch.DrawString(MainText, "PRESS SPACE TO GIVE PATH", new Vector2(100, 150), Color.Gray);
            }

            if (enterinstrucshow == true)
            {
                spriteBatch.DrawString(MainText, "PRESS ENTER TO FINISH GIVING PATH", new Vector2(100, 150), Color.Gray);
            }

            if (followinstrucshow == true)
            {
                spriteBatch.DrawString(MainText, "PRESS F TO BEGIN FOLLOW", new Vector2(100, 150), Color.Gray);
            }

            if (tryagainshow == true)
            {
                spriteBatch.DrawString(MainText, "PRESS E TO TRY AGAIN", new Vector2(100, 150), Color.Gray);
            }
            spriteBatch.End();

            base.Draw(gameTime);
        }
    }
}