using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using SharpDX.Direct3D9;
using System.Windows.Forms.Automation;


namespace Space_invaders_2
{
    public class Game1 : Game
    {
        private GraphicsDeviceManager _graphics;
        private SpriteBatch _spriteBatch;
        Player player = new Player();
        private Texture2D invaderTexture;

        private Texture2D _title;

        private Enemy[,] enemies; // 2D array för enemies
        private int rows = 3;
        private int cols = 5;

        private int _score = 0;

        private Texture2D _liveText;

        private Screen screen;

        private int playerLives = 3;
        private float playerInvincibleTimer = 0f; // Timer för invincibility
        private float invincibilityDuration = 2f; // antal sekunder för invincibility


        public Game1()
        {
            _graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
            IsMouseVisible = true;

            _graphics.PreferredBackBufferWidth = 600;
            _graphics.PreferredBackBufferHeight = 800; // geight på console skräm
        }

        protected override void Initialize()
        {

            screen = new Screen();

            Window.Title = "Space Invaders -   SCORE:" + _score; //score i titel listan


            base.Initialize();
        }

        protected override void LoadContent()
        {
            _spriteBatch = new SpriteBatch(GraphicsDevice);
            player.Load(Content);

            _title = Content.Load<Texture2D>("title");
            invaderTexture = Content.Load<Texture2D>("Invader");

            _liveText = Content.Load<Texture2D>("lives");

            screen.Load(Content);




            Array();


        }

        protected override void Update(GameTime gameTime)
        {

            screen.Update(gameTime);
            bool allEnemiesDestroyed = true;

            //normalisera invincibility timer så att tiden går ner
            if (playerInvincibleTimer > 0)
            {
                playerInvincibleTimer -= (float)gameTime.ElapsedGameTime.TotalSeconds;
            }


            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
                Exit();

            player.Update(gameTime, Content);

            // Update each enemy
            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < cols; col++)
                {
                    Enemy enemy = enemies[row, col];
                    if (enemy != null)
                    {
                        enemy.Update();
                        allEnemiesDestroyed = false;
                    }
                }
            }

            // checha kollision mellan enemy och bullet (foor loop som går genom hela loppen)
            for (int i = player.Bullets.Count - 1; i >= 0; i--)
            {
                Bullet bullet = player.Bullets[i];

                for (int row = 0; row < rows; row++)
                {
                    for (int col = 0; col < cols; col++)
                    {
                        Enemy enemy = enemies[row, col];

                        //collision för enemy och bullet
                        if (enemy != null && enemy.CheckCollision(bullet))
                        {
                            // Remove bullet after colliding with an enemy arry
                            player.Bullets.RemoveAt(i);

                            // remove enemy after geting hit by a bullet boom
                            enemies[row, col] = null;
                            _score++;
                            Window.Title = "Space Invaders -   SCORE:" + _score;

                            break;
                        }
                    }
                }
            }

            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < cols; col++)
                {
                    Enemy enemy = enemies[row, col];

                    //collision med spelare och enemy

                    if (enemy != null && enemy.CheckCollisionPlayer(player))
                    {
                        //logik för collision med enemy och spelare
                     playerLives--;
                        

    }
                }
            }

            // spelet tar slut när liv = 0 eller när antal fiender = 0 och kollar även så att det inte blir null
            if (allEnemiesDestroyed || (enemies[0, 0] != null && enemies[0, 0].Lives <= 0))
            {
                screen.SetGameOver();
            }

            //if (playerLives <= 0)
            //{
            //    screen.SetGameOver();  // End the game when player has no lives left
            //}
            
            //if (playerInvincibleTimer <= 0)
            //        {
            //            // Reduce lives and start invincibility
            //            enemy.Lives--; // Assuming you reduce life here for testing
            //            playerInvincibleTimer = invincibilityDuration; // Reset the timer
            //        }

            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {

            GraphicsDevice.Clear(Color.Gray);

            _spriteBatch.Begin();

            // Only draw non-null enemies
            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < cols; col++)
                {
                    if (enemies[row, col] != null)
                    {
                        enemies[row, col].Draw(_spriteBatch);
                    }
                }
            }

            _spriteBatch.Draw(_title, new Vector2(0, 30), Color.White);
            player.Draw(_spriteBatch);



            screen.Draw(_spriteBatch);
            _spriteBatch.End();

            

            base.Draw(gameTime);
            
        }




        // metod för enemy array
        void Array()
        {

            enemies = new Enemy[rows, cols];

            float totalWidth = (cols - 1) * 120;
            float startX = (_graphics.PreferredBackBufferWidth - totalWidth) / 2; // Center invaders textture i mitten av skärmen
            

            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < cols; col++)
                {

                    //justera start positionen för aenemy rrayn
                    int y = row * 50 + 80;
                    int x = (int)(startX + col * 100);
                    enemies[row, col] = new Enemy(new Vector2(x, y), invaderTexture, _liveText);
                }
            }

        }
    }
}