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 XNA_Game_Try_2
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        private Texture2D megaman;
        private Texture2D megamanFlip;
        private Texture2D background;
        private KeyboardState keyBoard;
        private AnimatedSprite megamanRun;
        private AnimatedSprite megamanJump;
        private AnimatedSprite megamanJumpFlip;
        int timeSinceLastFrame = 0;     // two vars to control
        int millisecondsPerFrame = 100; // the speed of the movement
        public string xScale = "Right"; //sprite state var
        public string yScale = "Up"; //sprite state var
        Vector2 megamanPosition;
        Vector2 megamanStartingPosition = Vector2.Zero;
        float speed = 4;
        bool jumping; //Is the character jumping?
        float startY, jumpspeed = 0; //startY to tell us //where it lands, jumpspeed to see how fast it jumps










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

        /// <summary>
        /// Allows the game to perform any initialization it needs to before starting to run.
        /// This is where it can query for any required services and load any non-graphic
        /// related content.  Calling base.Initialize will enumerate through any components
        /// and initialize them as well.
        /// </summary>
        protected override void Initialize()
        {
            // TODO: Add your initialization logic here

            base.Initialize();


        }

        /// <summary>
        /// LoadContent will be called once per game and is the place to load
        /// all of your content.
        /// </summary>
        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
            megaman = Content.Load<Texture2D>("MegamanX"); // Stand sprite facing to the right
            megamanFlip = Content.Load<Texture2D>("MegamanX_Flip"); // Stand sprite facing to the left
            background = Content.Load<Texture2D>("stage1"); // The temp background
            Texture2D texture = Content.Load<Texture2D>("Megaman Tileset"); // Character's running sprite loaded
            Texture2D texture2 = Content.Load<Texture2D>("MegamanX_Jump"); // Character's jumping sprite loaded
            megamanRun = new AnimatedSprite(texture, 1, 5); // Character's running sprite in a var
            megamanJump = new AnimatedSprite(texture2, 1, 7); // Character's jumping sprite in a var
            megamanPosition = new Vector2(150, 170); // Character's position upon starting the game
            startY = megamanPosition.Y;//Starting position
            jumping = false;//Init jumping to false
            jumpspeed = 0;//Default no speed




        }

        /// <summary>
        /// UnloadContent will be called once per game and is the place to unload
        /// all content.
        /// </summary>
        protected override void UnloadContent()
        {
            // TODO: Unload any non ContentManager content here
        }

        /// <summary>
        /// Allows the game to run logic such as updating the world,
        /// checking for collisions, gathering input, and playing audio.
        /// </summary>
        /// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Update(GameTime gameTime)
        {
            // Allows the game to exit
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();

            keyBoard = Keyboard.GetState();

            if (keyBoard.IsKeyDown(Keys.Right))
            {
                megamanPosition.X += speed;
                xScale = "Right";
                //Walk to the right
            }

            if (keyBoard.IsKeyDown(Keys.Left))
            {
                megamanPosition.X -= speed;
                xScale = "Left";
                //Walk to the left
            }





            if (keyBoard.Equals(new KeyboardState()))
            {
                if (xScale == "Right")
                {
                    xScale = "StandRight";
                }
                else if (xScale == "Left")
                {
                    xScale = "StandLeft";
                }


                //No keys are pressed.
            }





            //movment control speed
            timeSinceLastFrame += gameTime.ElapsedGameTime.Milliseconds;
            if (timeSinceLastFrame > millisecondsPerFrame)
            {
                timeSinceLastFrame -= millisecondsPerFrame;
                megamanRun.Update();
            }


            if (jumping)
            {
                megamanPosition.Y += jumpspeed;//Making it go up
                jumpspeed += 1;

                if (megamanPosition.Y >= startY)
                //If it's farther than ground
                {
                    megamanPosition.Y = startY;//Then set it on
                    jumping = false;

                }
            }
            else
            {
                if (keyBoard.IsKeyDown(Keys.Up))
                {
                    jumping = true;
                    jumpspeed = -14;//Give it upward thrust

                }
            }

            base.Update(gameTime);
        }

        /// <summary>
        /// This is called when the game should draw itself.
        /// </summary>
        /// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);

            spriteBatch.Begin();
            spriteBatch.Draw(background, new Rectangle(0, 0, 800, 480), Color.White);
            spriteBatch.End();

            if (xScale == "Right" || xScale == "Left")
            {
                megamanRun.Draw(spriteBatch, megamanPosition, xScale);
            }

            else if (xScale == "StandRight")
            {
                spriteBatch.Begin();
                spriteBatch.Draw(megaman, megamanPosition, Color.White);
                spriteBatch.End();

            }
            else if(xScale == "StandLeft")
            {
                spriteBatch.Begin();
                spriteBatch.Draw(megamanFlip, megamanPosition, Color.White);
                spriteBatch.End();
            }

            else if (jumping)
            {
                megamanJump.Draw(spriteBatch, megamanPosition, xScale);
            }






            base.Draw(gameTime);
        }
    }
}