// GfxEd interface
// Copyright (C) 2004  Ian Cowburn
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//
// $Id$
//
using System;
using System.Collections;
using System.Drawing;
using System.Windows.Forms;
using System.IO;

namespace GfxEdInterface
{
	/// <summary>
	/// Defines the interface a plugin must follow
	/// </summary>
	public interface IPlugin
	{
		/// <summary>
		/// The description for this plugin
		/// </summary>
		string			Description		{get;}
		
		/// <summary>
		/// The short name (for drop down list use) of this plugin
		/// </summary>
		string			ShortName		{get;}
		
		/// <summary>
		/// The copyright and author information for this plugin
		/// </summary>
		string			Author			{get;}

		/// <summary>
		/// The URL where this plugin can be found
		/// </summary>
		string			URL				{get;}

		/// <summary>
		/// The maximum number of colours for a sprite
		/// </summary>
		uint			MaxColours		{get;}
		
		/// <summary>
		/// The machines palette.  Sprite colours are selected from this.
		/// </summary>
		/// <remarks>
		/// Note that colour zero is considered the transparent/background
		/// colour and cannot be selected for drawing.  On platforms where the
		/// actual colour could be used, duplicate it and weight your palette
		/// routines when outputing accordingly.
		/// </remarks>
		Colour[]		Palette			{get;}
		
		/// <summary>
		/// An array indicating that that colour in the sprite can be changed.
		/// </summary>
		bool[]			SprPalEditable	{get;}
		
		/// <summary>
		/// An array indicating that that colour in the sprite is common to all.
		/// </summary>
		bool[]			SprPalCommon	{get;}
		
		/// <summary>
		/// The allowable sprite sizes.
		/// </summary>
		SpriteSize[]	AllowedSizes	{get;}

		/// <summary>
		/// The default extension for exports 
		/// </summary>
		string			ExportExtension	{get;}

		/// <summary>
		/// Exports the sprites.
		/// </summary>
		/// <param name="path">The exported filename</param>
		/// <param name="sprites">A list of sprites to export</param>
		/// <returns></returns>
		bool			Export(string path, SpriteList sprites);
		
		/// <summary>
		/// Get the configuration object for the plugin.
		/// </summary>
		/// <remarks>
		/// If there is no configuration required for the plugin, null can be
		/// returned.
		/// </remarks>
		IConfig			Config			{get;}
		
		/// <summary>
		/// Get the processing object for the plugin.
		/// </summary>
		/// <remarks>
		/// If there is no processing supplied by the plugin, null can be
		/// returned.
		/// </remarks>
		IProcess			Process			{get;}
	}

	
	/// <summary>
	/// Defines the configuration interface for a plugin.
	/// </summary>
	public interface IConfig
	{
		/// <summary>
		/// Shows the configuration dialog.
		/// </summary>
		void	Settings(Form parent);
		
		/// <summary>
		/// Outputs the configuration to the suppluied stream.
		/// </summary>
		/// <remarks>
		/// All file operations are done using text files.
		/// </remarks>
		/// <param name="stream">The output stream</param>
		void	Output(TextWriter stream);
		
		/// <summary>
		/// Inputs the configuration from the suppluied stream.
		/// </summary>
		/// <remarks>
		/// All file operations are done using text files.
		/// </remarks>
		/// <param name="stream">The output stream</param>
		void	Input(TextReader stream);
	}

	
	/// <summary>
	/// Defines the processing interface for a plugin.
	/// </summary>
	public interface IProcess
	{
		/// <summary>
		/// Process the sprite.
		/// </summary>
		void	Single(Sprite s);
		
		/// <summary>
		/// Process all the sprites.
		/// </summary>
		void	All(SpriteList s);
	}

	
	/// <summary>
	/// Defines the allowable sizes for a sprite and their aspect ratios
	/// </summary>
	public class SpriteSize
	{
		public SpriteSize(uint w, uint h, uint xaspect, uint yaspect)
		{
			m_width=w;
			m_height=h;
			m_xaspect=xaspect;
			m_yaspect=yaspect;
		}
		
		public uint Width	{get {return m_width;}}
		public uint Height	{get {return m_height;}}
		public uint XAspect	{get {return m_xaspect;}}
		public uint YAspect	{get {return m_yaspect;}}
		
		public override string ToString()
		{
			return m_width.ToString()+","+m_height.ToString();
		}

		private uint	m_width;
		private uint	m_height;
		private uint	m_xaspect;
		private uint	m_yaspect;
	}


	/// <summary>
	/// Describes a colour.  And yes, a *very* dumb class name.
	/// </summary>
	public class Colour
	{
		public Colour(string name, byte red, byte green, byte blue)
		{
			m_name=name;
			m_red=red;
			m_blue=blue;
			m_green=green;
		}
		
		public override string ToString()
		{
			return Name;
		}

		public string Name
		{
			get {return m_name;}
			set {m_name=value;}
		}
		
		public byte Red
		{
			get {return m_red;}
			set {m_red=value;}
		}
		
		public byte Green
		{
			get {return m_green;}
			set {m_green=value;}
		}
		
		public byte Blue
		{
			get {return m_blue;}
			set {m_blue=value;}
		}
		
		public Color DrawCol
		{
			get {return Color.FromArgb(m_red,m_green,m_blue);}
		}
		
		private string	m_name;
		private byte	m_red;
		private byte	m_green;
		private byte	m_blue;
	}


	/// <summary>
	/// Describes a sprite
	/// </summary>
	public class Sprite
	{
		public Sprite(string name, uint width, uint height, uint maxcol)
		{
			m_name=name;
			m_width=width;
			m_height=height;
			m_data=new uint[m_width,m_height];
			m_pal=new uint[maxcol];
			
			for(uint f=0;f<maxcol;f++)
			{
				m_pal[f]=f;
			}
		}
		
		public Sprite(string name, SpriteSize size, uint maxcol)
		{
			m_name=name;
			m_width=size.Width;
			m_height=size.Height;
			m_data=new uint[m_width,m_height];
			m_pal=new uint[maxcol];
			
			for(uint f=0;f<maxcol;f++)
			{
				m_pal[f]=f;
			}
		}
		
		public Sprite(Sprite old)
		{
			m_name=old.m_name;
			m_width=old.m_width;
			m_height=old.m_height;
			m_data=new uint[m_width,m_height];
			m_pal=new uint[old.m_pal.Length];
			
			for(int x=0;x<m_width;x++)
				for(int y=0;y<m_height;y++)
					m_data[x,y]=old.m_data[x,y];
			
			for(int f=0;f<m_pal.Length;f++)
				m_pal[f]=old.m_pal[f];
		}
		
		public string Name
		{
			get {return m_name;}
			set {m_name=value;}
		}
		
		public uint Width
		{
			get {return m_width;}
		}
		
		public uint Height
		{
			get {return m_height;}
		}
		
		public void Resize(uint width, uint height)
		{
			uint[,] data=new uint[width,height];
			uint mx=Math.Min(width,m_width);
			uint my=Math.Min(height,m_height);
			
			for(int x=0;x<mx;x++)
				for(int y=0;y<my;y++)
					data[x,y]=m_data[x,y];
			
			m_width=width;
			m_height=height;
			m_data=data;
		}
		
		public uint this [uint x, uint y]
		{
			set {m_data[x,y]=value;}
			get {return m_data[x,y];}
		}
		
		public uint Pal(uint i)
		{
			return m_pal[i];
		}
		
		public void Pal(uint i, uint c)
		{
			m_pal[i]=c;
		}
		
		public void Clear()
		{
			for(int y=0;y<m_height;y++)
				for(int x=0;x<m_width;x++)
					m_data[x,y]=0;
		}
		
		public void MirrorHorizontal()
		{
			uint[,] d=new uint[m_width,m_height];
			
			for(int y=0;y<m_height;y++)
				for(int x=0;x<m_width;x++)
				d[x,y]=m_data[m_width-x-1,y];
			
			m_data=d;
		}

		public void MirrorVertical()
		{
			uint[,] d=new uint[m_width,m_height];
			
			for(int y=0;y<m_height;y++)
				for(int x=0;x<m_width;x++)
				d[x,y]=m_data[x,m_height-y-1];
			
			m_data=d;
		}
		
		public void Scroll(int dx, int dy)
		{
			uint[,] d=new uint[m_width,m_height];
			
			for(int y=0;y<m_height;y++)
				for(int x=0;x<m_width;x++)
				d[Mod(x+dx,m_width),Mod(y+dy,m_height)]=m_data[x,y];
			
			m_data=d;
		}
		
		public void RotateRight()
		{
			uint[,] d=new uint[m_width,m_height];
			uint min=Math.Min(m_width,m_height);
			
			for(int y=0;y<m_height;y++)
				for(int x=0;x<m_width;x++)
				{
					long nx=min-y-1;
					long ny=x;
					
					if (nx>=0 && nx<m_width && ny>=0 && ny<m_height)
					{
						d[nx,ny]=m_data[x,y];
					}
				}
			
			m_data=d;
		}

		public void RotateLeft()
		{
			uint[,] d=new uint[m_width,m_height];
			uint min=Math.Min(m_width,m_height);
			
			for(int y=0;y<m_height;y++)
				for(int x=0;x<m_width;x++)
				{
					long nx=y;
					long ny=min-x-1;
					
					if (nx>=0 && nx<m_width && ny>=0 && ny<m_height)
					{
						d[nx,ny]=m_data[x,y];
					}
				}
			
			m_data=d;
		}

		public void Output(TextWriter stream)
		{
			stream.WriteLine(m_name);
			stream.WriteLine(m_width);
			stream.WriteLine(m_height);

			stream.Write(m_pal.Length);
			
			for(int f=0;f<m_pal.Length;f++)
			{
				stream.Write(","+m_pal[f]);
			}
			
			stream.WriteLine();
			
			for(int y=0;y<m_height;y++)
			{
				for(int x=0;x<m_width;x++)
				{
					if (x==0)
					{
						stream.Write(m_data[x,y]);
					}
					else
					{
						stream.Write(","+m_data[x,y]);
					}
				}
				
				stream.WriteLine();
			}
		}
		
		public static Sprite Input(TextReader stream)
		{
			string name=stream.ReadLine();
			uint width=Convert.ToUInt32(stream.ReadLine());
			uint height=Convert.ToUInt32(stream.ReadLine());
			string[] pal=stream.ReadLine().Split(new Char[1] {','});
			
			Sprite s=new Sprite(name, width, height, Convert.ToUInt32(pal[0]));
			
			for(int f=0;f<s.m_pal.Length;f++)
			{
				s.m_pal[f]=Convert.ToUInt32(pal[f+1]);
			}
			
			for(uint y=0;y<height;y++)
			{
				string[] data=stream.ReadLine().Split(new Char[1] {','});
				
				for(uint x=0;x<width;x++)
				{
					s[x,y]=Convert.ToUInt32(data[x]);
				}
			}
			
			return s;
		}
		
		// ------------------------------------------------
		// PRIVATE
		//
		private string		m_name;
		private uint		m_width;
		private uint		m_height;
		private uint[,]		m_data;
		private uint[]		m_pal;
		
		private int Mod(int v, uint max)
		{
			while(v<0)
				v+=(int)max;
			
			v=v%(int)max;
			
			return v;
		}
	}


	/// <summary>
	/// Describes a list of sprites
	/// </summary>
	public class SpriteList : IEnumerable
	{
		public SpriteList()
		{
			m_list=new ArrayList();
			m_changed=false;
		}
		
		public Sprite this [int i]
		{
			get {return (Sprite)m_list[i];}
			set
			{
				m_list[i]=value;
				m_changed=true;
			}
		}
		
		public void Add(Sprite s)
		{
			m_list.Add(s);
			m_changed=true;
		}
		
		public void Insert(int i, Sprite s)
		{
			m_list.Insert(i,s);
			m_changed=true;
		}
		
		public void RemoveAt(int i)
		{
			m_list.RemoveAt(i);
		}
		
		public int Count
		{
			get {return m_list.Count;}
		}
		
		public void Clear()
		{
			m_list.Clear();
		}
		
		public bool Changed
		{
			get {return m_changed;}
			set {m_changed=value;}
		}
		
		public IEnumerator GetEnumerator()
		{
			return m_list.GetEnumerator();
		}
		
		public void Output(TextWriter stream)
		{
			stream.WriteLine(m_list.Count);
			
			foreach (Sprite s in m_list)
			{
				s.Output(stream);
			}
		}
		
		public static SpriteList Input(TextReader stream)
		{
			SpriteList l=new SpriteList();
			int count=Convert.ToInt32(stream.ReadLine());
			
			for(int f=0;f<count;f++)
			{
				l.Add(Sprite.Input(stream));
			}
			
			return l;
		}
		
		// ------------------------------------------------
		// PRIVATE
		//
		private ArrayList	m_list;
		private bool		m_changed;
	}
}