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

partial class GAME : Game
{
	static void Main() { new GAME().Run(); }
	
    GraphicsDeviceManager graphics;
    SpriteBatch sprite_batch;
	
	int draw_scale = 3;
	Matrix scale_matrix;
	
	const int NES_W = 256;
	const int NES_H = 224;
	const int HUD_H = 56;
	XY SCREEN_SIZE = new XY(16, 11) * new XY(16, 16);
	
	Dictionary<string, Texture2D> pngs;
	
	Texture2D bg_png;
	Vector2 link_pos;
	XY link_dir;
	float link_speed;
	bool using_sword;
	Vector2 sword_pos;
	ANIM link_anim;
	ANIM sword_anim;
	
	class FRAME
	{
		public string png;
		public XY xy;
		public static FRAME EMPTY = new FRAME("", 0, 0);
		public FRAME() { }
		public FRAME(string png, int x, int y) { this.png = png; xy.x = x; xy.y = y; }
	}
	class ANIM
	{
		public bool repeats;
		public int frame;
		public FRAME[] frames;
		public ANIM() { }
		public ANIM(FRAME[] frames) { this.frames = frames; }
	}
	Dictionary<string, ANIM> anims;
	void reset_anim(ANIM anim) { anim.frame = 0; }
	void update_anim(ANIM anim)
	{
		if (anim.frame < anim.frames.Length) anim.frame++;
		if (anim.frame == anim.frames.Length && anim.repeats) anim.frame = 0;
	}
	bool anim_done(ANIM anim) { return anim.frame >= anim.frames.Length; }
	string anim_png(ANIM anim)
	{ 
		if (anim.frame >= anim.frames.Length) return null;
		return anim.frames[anim.frame].png; 
	}
	XY anim_offset(ANIM anim)
	{ 
		if (anim.frame >= anim.frames.Length) return XY.ZERO;
		return anim.frames[anim.frame].xy; 
	}
	
// from anims.cs //

	void init_anims()
	{
		anims = new Dictionary<string, ANIM>();
		
// just pulled one dir of each //
		anims.Add("link_walk_e", new ANIM(new FRAME[]
		{
			new FRAME("link_walk_e1", 0, 0), // 0
			new FRAME("link_walk_e1", 0, 0), // 1
			new FRAME("link_walk_e1", 0, 0), // 2
			new FRAME("link_walk_e1", 0, 0), // 3
			new FRAME("link_walk_e1", 0, 0), // 4
			new FRAME("link_walk_e1", 0, 0), // 5
			new FRAME("link_walk_e2", 0, 0), // 6
			new FRAME("link_walk_e2", 0, 0), // 7
			new FRAME("link_walk_e2", 0, 0), // 8
			new FRAME("link_walk_e2", 0, 0), // 9
			new FRAME("link_walk_e2", 0, 0), // 10
			new FRAME("link_walk_e2", 0, 0), // 11
		})); anims["link_walk_e"].repeats = true;
		anims.Add("link_attack_e", new ANIM(new FRAME[]
		{
			new FRAME("link_attack_e", 0, 0), // 0
			new FRAME("link_attack_e", 0, 0), // 1
			new FRAME("link_attack_e", 0, 0), // 2
			new FRAME("link_attack_e", 0, 0), // 3
			new FRAME("link_attack_e", 0, 0), // 4
			new FRAME("link_attack_e", 0, 0), // 5
			new FRAME("link_attack_e", 0, 0), // 6
			new FRAME("link_attack_e", 0, 0), // 7
			new FRAME("link_attack_e", 0, 0), // 8
			new FRAME("link_attack_e", 0, 0), // 9
			new FRAME("link_attack_e", 0, 0), // 10
			new FRAME("link_attack_e", 0, 0), // 11
			new FRAME("link_walk_e2", 0, 0), // 12
			new FRAME("link_walk_e1", 0, 0), // 13
		}));
		anims.Add("sword_e", new ANIM(new FRAME[]
		{
			FRAME.EMPTY, // 0
			FRAME.EMPTY, // 1
			FRAME.EMPTY, // 2
			FRAME.EMPTY, // 3
			new FRAME("sword_e", +11, 0), // 4
			new FRAME("sword_e", +11, 0), // 5
			new FRAME("sword_e", +11, 0), // 6
			new FRAME("sword_e", +11, 0), // 7
			new FRAME("sword_e", +11, 0), // 8
			new FRAME("sword_e", +11, 0), // 9
			new FRAME("sword_e", +11, 0), // 10
			new FRAME("sword_e", +11, 0), // 11
			new FRAME("sword_e", +8, 0), // 12
			new FRAME("sword_e", +4, 0), // 13
		}));
	}

    public GAME()
    {
        graphics = new GraphicsDeviceManager(this);
		set_backbuffer_size(NES_W * draw_scale, NES_H * draw_scale);
        IsMouseVisible = true;
    }

    protected override void LoadContent()
    {
        sprite_batch = new SpriteBatch(GraphicsDevice);
		scale_matrix = Matrix.CreateScale(draw_scale);
		pngs = load_pngs(".");
		pngs.Add("", null);
		init_anims();
		bg_png = pngs["background"];
		link_anim = anims["link_walk_n"];
		link_dir = XY.UP;
		link_pos = new Vector2(120, 136);
		link_speed = 1.5f;
		using_sword = false;
    }
	
    protected override void Update(GameTime gameTime)
    {
		update_keyboard();
		
		if (using_sword)
		{
			update_anim(link_anim);
			update_anim(sword_anim);
			sword_pos = link_pos + anim_offset(sword_anim);
			if (anim_done(sword_anim))
			{
				using_sword = false;
				if (link_dir == XY.UP) link_anim = anims["link_walk_n"];
				else if (link_dir == XY.DOWN) link_anim = anims["link_walk_s"];
				else if (link_dir == XY.LEFT) link_anim = anims["link_walk_w"];
				else if (link_dir == XY.RIGHT) link_anim = anims["link_walk_e"];
				reset_anim(link_anim);
			}
		}
		if (!using_sword)
		{
			if (keydown(Keys.X))
			{
				using_sword = true;
				char dir_c = '\0';
				if (link_dir == XY.UP) dir_c = 'n';
				else if (link_dir == XY.DOWN) dir_c = 's';
				else if (link_dir == XY.LEFT) dir_c = 'w';
				else if (link_dir == XY.RIGHT) dir_c = 'e';
				link_anim = anims["link_attack_" + dir_c];
				sword_anim = anims["sword_" + dir_c]; 
				reset_anim(link_anim);
				reset_anim(sword_anim);
				sword_pos = link_pos + anim_offset(sword_anim);
			}
			else if (keydown(Keys.Up))
			{
				update_anim(link_anim);
				if (link_dir != XY.UP)
				{
					link_dir = XY.UP;
					link_anim = anims["link_walk_n"];
					reset_anim(link_anim);
				}
				link_pos += link_dir * link_speed;
			}
			else if (keydown(Keys.Down))
			{
				update_anim(link_anim);
				if (link_dir != XY.DOWN)
				{
					link_dir = XY.DOWN;
					link_anim = anims["link_walk_s"];
					reset_anim(link_anim);
				}
				link_pos += link_dir * link_speed;
			}
			else if (keydown(Keys.Left))
			{
				update_anim(link_anim);
				if (link_dir != XY.LEFT)
				{
					link_dir = XY.LEFT;
					link_anim = anims["link_walk_w"];
					reset_anim(link_anim);
				}
				link_pos += link_dir * link_speed;
			}
			else if (keydown(Keys.Right))
			{
				update_anim(link_anim);
				if (link_dir != XY.RIGHT)
				{
					link_dir = XY.RIGHT;
					link_anim = anims["link_walk_e"];
					reset_anim(link_anim);
				}
				link_pos += link_dir * link_speed;
			}
		}
		
        base.Update(gameTime);
    }

    protected override void Draw(GameTime gameTime)
    {
        GraphicsDevice.Clear(Color.Black);

		start_batch(scale_matrix);
		draw_sprite(bg_png, Vector2.Zero, null, Color.White);
		if (using_sword) draw_sprite(pngs[anim_png(sword_anim)], (XY)sword_pos, null, Color.White);
		draw_sprite(pngs[anim_png(link_anim)], (XY)link_pos, null, Color.White);
		end_batch();

        base.Draw(gameTime);
    }
}