using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using System.Collections.Generic;
using System;

namespace Asteroids;

public class AllAst
{
    public List<asteroid> As;
    private List<Explosion> EX;
    public List<powerupbox> Pow;
    public Texture2D[] asTextures;
    private Player PL;
    private int wait;
    public AllAst(Player PL)
    {
        this.PL = PL;
        As = new List<asteroid>();
        Pow = new List<powerupbox>();
        EX = new List<Explosion>();
    }
    public void Update(SpriteBatch _spriteBatch)
    {
        foreach (var item in As)
        {
            bullet rm = null;
            foreach (var it in PL.Bullets)
            {
                if (item.Rect.Intersects(it.Rect))
                {
                    item.Health--;
                    AudioEn.playsound(4);
                    rm = it;
                    break;
                }
            }
            if (rm != null)
            {
                PL.Bullets.Remove(rm);
            }
        }
        As.RemoveAll(pred);
        Pow.RemoveAll(PowPred);
        EX.RemoveAll(EXpred);
        wait--;
        if (wait <= 0)
        {
            Random r = new Random();
            float maxpoints = 1000f;
            float t = ((float)vars.Points/maxpoints);
            wait = r.Next((int)MathHelper.Lerp(120, 10, t), (int)MathHelper.Lerp(300, 60, t));
            As.Add(new asteroid(asTextures[r.Next(asTextures.Length)], _spriteBatch));
        }
    }
    private bool pred(asteroid ase)
    {
        if (ase.Health <= 0)
        {
            vars.Points++;
            Random r = new Random();
            if(r.Next(0, 10) == 2)
            {
                Pow.Add(new powerupbox(ase.pos));
            }
            EX.Add(new Explosion(ase.Rect));
            return true;
        }
        if (ase.Rect.Intersects(PL.Rect))
        {
            PL.Health--;
            EX.Add(new Explosion(ase.Rect));
            return true;
        }
        if (!ase.Rect.Intersects(vars.PlayArea))
        {
            return true;
        }
        return false;
    }
    private bool PowPred(powerupbox PO)
    {
        if(PO.Rect.Top >= vars.PlayArea.Bottom)
        {
            return true;
        }
        if(PO.Rect.Intersects(PL.Rect))
        {
            PL.Ups.Add(new powerup());
            vars.Points += 5;
            return true;
        }
        return false;
    }
    private bool EXpred(Explosion E)
    {
        if(E.frame == E.mframe)
        {
            return true;
        }
        return false;
    }
    public void Draw(SpriteBatch _spriteBatch, GameTime gameTime)
    {
        foreach (var item in As)
        {
            item.Draw(_spriteBatch);
        }
        foreach (var item in Pow)
        {
            item.Draw(_spriteBatch);
        }
        foreach (var item in EX)
        {
            item.draw(_spriteBatch, gameTime);
        }
    }
}
public class asteroid
{
    public Texture2D Texture;
    public Rectangle Rect;
    public Vector2 pos;
    public float speed;
    public float rot;
    public float rots;
    public int Health;
    public hpbar bar;
    private float size;
    private int flydir;
    public asteroid(Texture2D Texture, SpriteBatch _spriteBatch)
    {
        this.Texture = Texture;
        Random r = new Random();
        speed = (float)((float)r.Next(5, 30) / 10f);
        rots = (float)((float)r.Next(5, 30) / 10f);
        flydir = r.Next(-25, 25);
        pos = new Vector2(r.Next(vars.PlayArea.X, vars.PlayArea.Right-Texture.Width), 100);
        Health = r.Next(5, 15);
        size = (float)((float)r.Next(50, 300)/100f);
        Rect = new Rectangle((int)pos.X, (int)pos.Y, (int)(Texture.Width*size), (int)(Texture.Height*size));
        bar = new hpbar(Health, _spriteBatch.GraphicsDevice);
    }
    public void Draw(SpriteBatch _spriteBatch)
    {
        Vector2 e = new Vector2(MathF.Cos(MathHelper.ToRadians(flydir)+1.5707963268f) * speed, MathF.Sin(MathHelper.ToRadians(flydir)+1.5707963268f) * speed);
        rot += rots;
        pos += e;
        bar.pos = new Vector2(Rect.Center.X, Rect.Center.Y);
        Rect = new Rectangle((int)pos.X, (int)pos.Y, Rect.Width, Rect.Height);
        _spriteBatch.Draw(Texture, Rect.Center.ToVector2(), null, Color.White, MathHelper.ToRadians(rot), new Vector2(Texture.Width / 2, Texture.Height / 2), new Vector2(size, size), SpriteEffects.None, 0f);
        if(bar.max != Health)
        {
            bar.Draw(_spriteBatch, Health);
        }
    }
}
public class hpbar
{
    public Texture2D ThePixel;
    public float max;
    public Vector2 pos;
    public hpbar(float max, GraphicsDevice gd)
    {
        this.max = max;
        ThePixel = new Texture2D(gd, 1, 1);
        ThePixel.SetData<Color>(new Color[] { Color.White});
    }
    public void Draw(SpriteBatch _spriteBatch, float v)
    {
        int size = (int)((v/max) * 38);
        Rectangle[] rects = new Rectangle[]{
            new Rectangle((int)pos.X-20, (int)pos.Y+20, 40, 10),
            new Rectangle((int)pos.X-19, (int)pos.Y+20, 38, 8),
            new Rectangle((int)pos.X-19, (int)pos.Y+20, size, 8)
        };
        Color[] cs = new Color[]{
            Color.Black,
            Color.Red,
            Color.Green,
        };
        for (int i = 0; i < rects.Length; i++)
        {
            _spriteBatch.Draw(ThePixel, rects[i], null, cs[i]);
        }
    }
}
public class powerupbox
{
    public Texture2D Texture;
    public Vector2 pos;
    public Rectangle Rect;
    public powerupbox(Vector2 pos)
    {
        this.pos = pos;
        Random r = new Random();
        Texture = vars.PowerUpTex[r.Next(0, vars.PowerUpTex.Length)];
        Rect = new Rectangle((int)pos.X, (int)pos.Y, Texture.Width, Texture.Height);
    }
    public void Draw(SpriteBatch _sprtieBatch)
    {
        pos.Y += 1f;
        Rect = new Rectangle((int)pos.X, (int)pos.Y, Rect.Width, Rect.Height);
        _sprtieBatch.Draw(Texture, pos, null, Color.White);
    }
}
public class Explosion
{
    private Rectangle rect;
    private Rectangle source;
    private float time;
    public int mframe;
    public int frame;
    public Explosion(Rectangle ase)
    {
        rect = new Rectangle(ase.X-ase.Width/2, ase.Y-ase.Height/2, 100, 100);
        source = new Rectangle(0, 0, 100, 100);
        frame = 1;
        mframe = 81;
    }
    public void draw(SpriteBatch _spriteBatch, GameTime gameTime)
    {
        frame += 2;
        if(frame == 17)
        {
            AudioEn.playsound(3);
        }
        source.X = source.Width*(frame-1);
        _spriteBatch.Draw(vars.explosionsheet, rect, source, Color.White);
        time += (float)gameTime.ElapsedGameTime.TotalSeconds;
    }
}