using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Audio;

namespace SuperPolarity
{
    class MainShip : Ship
    {

        public static Color BlueColor;
        public static Color RedColor;

        ParticleEngine particleEngine;

        protected bool Shooting;
        protected int ShotCooldown;

        protected float CurrentImmortalTime;
        protected float MaxImmortalTime;
        protected bool Flashing;

        protected SoundEffect PolarityChange;
        protected SoundEffect ShootSound;
        protected SoundEffect Hit;

        public MainShip(SuperPolarity newGame) : base(newGame) {}

        ~MainShip()
        {
            particleEngine = null;
        }

        public override void Initialize(Texture2D texture, Vector2 position)
        {
            base.Initialize(texture, position);

            MainShip.BlueColor = new Color(0, 184, 229);
            MainShip.RedColor = new Color(201, 0, 68);

            PolarityChange = game.Content.Load<SoundEffect>("Sound\\polaritychange");
            ShootSound = game.Content.Load<SoundEffect>("Sound\\bullet");
            Hit = game.Content.Load<SoundEffect>("Sound\\hit");

            InitParticleEngine();
            SetPolarity(Polarity.Positive);

            ActVelocity = 2.5f;

            ShotCooldown = 50;
            MaxImmortalTime = 1500;

            BoxDimensions.X = 2;
            BoxDimensions.Y = 2;
            BoxDimensions.W = 2;
            BoxDimensions.Z = 2;
            InitBox();

            BindInput();
        }

        void InitParticleEngine()
        {
            particleEngine = ParticleEffectFactory.CreatePolarCircle(Position);
        }

        void BindInput()
        {
            InputController.Bind("moveX", HandleHorizontalMovement);
            InputController.Bind("moveY", HandleVerticalMovement);
            InputController.Bind("changePolarity", HandleChangePolarity);
            InputController.Bind("shoot", HandleShot);
        }

        protected void HandleShot(float value)
        {

            Shooting = true;
            Timer t = new Timer(new TimerCallback(UnlockShot));
            t.Change(ShotCooldown, Timeout.Infinite);

            if (Children.Count > 10)
            {
                return;
            }

            var bullet = ActorFactory.CreateBullet(Position, Angle);

            Children.Add(bullet);
            bullet.Parent = this;

            ShootSound.Play();
        }

        protected void UnlockShot(object state)
        {
            InputController.Unlock("shoot");
            Shooting = false;
        }

        protected void HandleChangePolarity(float value)
        {
            SwitchPolarity();
        }

        public void HandleHorizontalMovement(float value)
        {
            if (value >= -0.5 && value <= 0.5)
            {
                value = 0;
            }

            Velocity.X = value * MaxVelocity;
        }

        public void HandleVerticalMovement(float value)
        {
            if (value >= -0.5 && value <= 0.5)
            {
                value = 0;
            }

            Velocity.Y = value * MaxVelocity;
        }

        public override void SwitchPolarity()
        {
            base.SwitchPolarity();
            SwitchParticleEngine(CurrentPolarity);
            PolarityChange.Play();
            game.Player.ResetMultiplier();
        }

        public override void SetPolarity(Polarity newPolarity)
        {
            base.SetPolarity(newPolarity);
            SwitchParticleEngine(newPolarity);
        }

        protected void SwitchParticleEngine(Polarity polarity)
        {
            if (polarity == Polarity.Positive)
            {
                particleEngine.Color = MainShip.RedColor;
            }
            else if (polarity == Polarity.Negative)
            {
                particleEngine.Color = MainShip.BlueColor;
            }
            else
            {
                particleEngine.Color = Color.Gray;
            }
        }

        public override void Update(GameTime gameTime)
        {
            base.Update(gameTime);
            particleEngine.EmitterLocation = Position;
            particleEngine.Update();
            ConstrainToEdges();
            UpdateImmortality(gameTime);
        }

        public void UpdateImmortality(GameTime gameTime)
        {
            if (Immortal)
            {
                CurrentImmortalTime += gameTime.ElapsedGameTime.Milliseconds;

                if (Flashing)
                {
                    Color = new Color(255, 255, 255, 128);
                }
                else
                {
                    Color = Color.White;
                }

                Flashing = !Flashing;

                if (CurrentImmortalTime > MaxImmortalTime)
                {
                    Immortal = false;
                    Color = Color.White;
                }
            }
        }

        public override void Move(GameTime gameTime)
        {
            var VelocityLimit = MaxVelocity;
            var SavedVelocity = new Vector2(Velocity.X, Velocity.Y);

            if (Shooting)
            {
                VelocityLimit = ActVelocity;
            }

            if (SavedVelocity.X > VelocityLimit)
            {
                SavedVelocity.X = VelocityLimit;
            }

            if (SavedVelocity.X < -VelocityLimit)
            {
                SavedVelocity.X = -VelocityLimit;
            }

            if (SavedVelocity.Y > VelocityLimit)
            {
                SavedVelocity.Y = VelocityLimit;
            }

            if (SavedVelocity.Y < -VelocityLimit)
            {
                SavedVelocity.Y = -VelocityLimit;
            }

            Position.X = Position.X + SavedVelocity.X;
            Position.Y = Position.Y + SavedVelocity.Y;
        }

        public override void Magnetize(Ship ship, float distance, float angle)
        {
        }

        protected void ConstrainToEdges()
        {
            if (Position.X < 0)
            { 
                Position.X = 0;

                if (Velocity.X < 0)
                {
                    Velocity.X = 0;
                }
            }
            if (Position.X > game.GraphicsDevice.Viewport.Width)
            { 
                Position.X = game.GraphicsDevice.Viewport.Width;

                if (Velocity.X > 0)
                {
                    Velocity.X = 0;
                }
            }
            if (Position.Y < 0) 
            {
                Position.Y = 0;

                if (Velocity.Y < 0)
                {
                    Velocity.Y = 0;
                }
            }
            if (Position.Y > game.GraphicsDevice.Viewport.Height)
            {
                Position.Y = game.GraphicsDevice.Viewport.Height;

                if (Velocity.Y < 0)
                {
                    Velocity.Y = 0;
                }
            }
        }

        public override void Draw(SpriteBatch spriteBatch)
        {
            particleEngine.Draw(spriteBatch);
            base.Draw(spriteBatch);
        }

        public override void Collide(Actor other, Rectangle collision)
        {
            if (other.GetType().IsAssignableFrom(typeof(StandardShip)) &&
                            !Immortal)
            {
                Die();
            }
        }

        protected override void Die()
        {
            game.Player.Lives = game.Player.Lives - 1;
            game.Player.ResetMultiplier();
            if (game.Player.Lives < 0)
            {
                Dying = true;
                game.GameOver();
            }
            else {
                Hit.Play();
                Immortal = true;
                CurrentImmortalTime = 0;
            }
        }

        public override void CleanUp()
        {
            base.CleanUp();
            particleEngine = null;
            InputController.Unbind("moveX", HandleHorizontalMovement);
            InputController.Unbind("moveY", HandleVerticalMovement);
            InputController.Unbind("changePolarity", HandleChangePolarity);
            InputController.Unbind("shoot", HandleShot);
        }
    }
}