using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Media;
using Microsoft.Xna.Framework.Input;

namespace SuperPolarity
{
    class GameScreen : Screen
    {
        public GameScreen(SuperPolarity newGame) : base(newGame) {}

        protected List<BasicGenerator> Generators;

        protected int LivesRate;
        protected int CurrentLivesRate;
        protected int BombRate;
        protected int CurrentBombRate;
        protected SoundEffect BombSound;
        protected SoundEffect LifeSound;
        
        protected bool Flashing;

        protected bool IsPaused;
        protected Texture2D PauseScreen;

        public override void Initialize()
        {
            Generators = new List<BasicGenerator>();

            CurrentBombRate = 1;
            BombRate = 6000;

            LivesRate = 10000;
            CurrentLivesRate = 1;

            InputController.RegisterEventForButton("changePolarity", Buttons.A);
            InputController.RegisterEventForKey("changePolarity", Keys.Z);

            InputController.RegisterEventForButton("shoot", Buttons.X);
            InputController.RegisterEventForKey("shoot", Keys.X);

            InputController.Bind("pause", HandlePause);

            PauseScreen = Game.Content.Load<Texture2D>("Graphics\\pause-screen");
        }

        protected void HandlePause(float value)
        {
            Console.WriteLine("Paused");
            IsPaused = !IsPaused;

            if (IsPaused)
            {
                MediaPlayer.Volume = 0.05f;
            }
            else
            {
                MediaPlayer.Volume = 1;
            }
        }

        public override void LoadContent()
        {
            CreateGenerators();

            Vector2 playerPosition = new Vector2(Game.GraphicsDevice.Viewport.TitleSafeArea.X + Game.GraphicsDevice.Viewport.Width / 2, Game.GraphicsDevice.Viewport.TitleSafeArea.Y + Game.GraphicsDevice.Viewport.TitleSafeArea.Height / 2);

            BombSound = Game.Content.Load<SoundEffect>("Sound\\bomb");
            LifeSound = Game.Content.Load<SoundEffect>("Sound\\life");

            Renderer.CheckIn(ActorFactory.CreateMainShip(playerPosition));

            Game.PlaySong("game");
        }
        
        protected void CalculateBomb()
        {
            if (Game.Player.Score >= BombRate * CurrentBombRate)
            {
                ActorManager.Bomb();
                Flashing = true;
                BombSound.Play();
                CurrentBombRate = CurrentBombRate + 1;
            }
        }

        protected void CalculateLife()
        {
            if (Game.Player.Score >= LivesRate * CurrentLivesRate)
            {
                Game.Player.Lives = Game.Player.Lives + 1;
                LifeSound.Play();
                CurrentLivesRate = CurrentLivesRate + 1;
            }
        }

        public override void Update(GameTime gameTime)
        {
            CalculateBomb();
            CalculateLife();
            InputController.UpdateInput(IsPaused);
            if (IsPaused)
            {
                return;
            }
            ActorManager.Update(gameTime);

            foreach (BasicGenerator generator in Generators)
            {
                generator.Update(gameTime);
            }
        }

        public override void Draw(SpriteBatch spriteBatch)
        {
            Renderer.Draw(spriteBatch);
            Game.Player.Draw(spriteBatch);

            if (IsPaused)
            {
                spriteBatch.Draw(PauseScreen, new Vector2(0, 0), Color.White);
            }

            if (Flashing)
            {
                Game.GraphicsDevice.Clear(Color.Black);
                Flashing = false;
            }
        }

        protected void CreateGenerators()
        {
            // The basic ship generators.
            var gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(-50, -50), BasicGenerator.Ships.Ship, 3000, 0);
            Generators.Add(gen); 
            
            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(-50, Game.GraphicsDevice.Viewport.Height + 50), BasicGenerator.Ships.Ship, 3000, 0);
            Generators.Add(gen); 
            
            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(Game.GraphicsDevice.Viewport.Width + 50, -50), BasicGenerator.Ships.Ship, 3000, 0);
            Generators.Add(gen);

            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(Game.GraphicsDevice.Viewport.Width + 50, Game.GraphicsDevice.Viewport.Height + 50), BasicGenerator.Ships.Ship, 3000, 0);
            Generators.Add(gen);

            // After 1.5k liberate some sporadic Scouts, and add two more ship generators.
            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(Game.GraphicsDevice.Viewport.Width / 2, -50), BasicGenerator.Ships.Ship, 3000, 1500);
            Generators.Add(gen);

            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(Game.GraphicsDevice.Viewport.Width / 2, Game.GraphicsDevice.Viewport.Height + 50), BasicGenerator.Ships.Ship, 3000, 1500);
            Generators.Add(gen);

            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(-50, Game.GraphicsDevice.Viewport.Height / 2), BasicGenerator.Ships.Scout, 6000, 1500);
            Generators.Add(gen);

            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(Game.GraphicsDevice.Viewport.Width + 50, Game.GraphicsDevice.Viewport.Height / 2), BasicGenerator.Ships.Scout, 6000, 1500);
            Generators.Add(gen);


            // After 3k add more scouts.
            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(Game.GraphicsDevice.Viewport.Width / 2, -50), BasicGenerator.Ships.Scout, 3000, 3000);
            Generators.Add(gen);

            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(Game.GraphicsDevice.Viewport.Width / 2, Game.GraphicsDevice.Viewport.Height + 50), BasicGenerator.Ships.Scout, 3000, 5000);
            Generators.Add(gen);

            // After 5k release more ships and a cruiser.
            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(Game.GraphicsDevice.Viewport.Width / 2, -50), BasicGenerator.Ships.Ship, 1500, 5000);
            Generators.Add(gen);

            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(Game.GraphicsDevice.Viewport.Width / 2, Game.GraphicsDevice.Viewport.Height + 50), BasicGenerator.Ships.Ship, 1500, 5000);
            Generators.Add(gen);

            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(-50, Game.GraphicsDevice.Viewport.Height / 2), BasicGenerator.Ships.Battlecruiser, 10000, 5000);
            Generators.Add(gen);

            gen = new BasicGenerator();
            gen.Initialize(Game, new Vector2(Game.GraphicsDevice.Viewport.Width + 50, Game.GraphicsDevice.Viewport.Height / 2), BasicGenerator.Ships.Battlecruiser, 10000, 5000);
            Generators.Add(gen);
        }

        public override void CleanUp()
        {
            base.CleanUp();
            Generators.Clear();
            InputController.Unbind("pause", HandlePause);
            Renderer.Empty();
            ActorManager.Empty();
        }
    }
}