/*
 * This file is part of gtkD.
 *
 * gtkD is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version, with
 * some exceptions, please read the COPYING file.
 *
 * gtkD 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with gtkD; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 */

module utils.GtkWrapper;

//debug=copyFile;
//debug=wrapFile;
//debug=wrapParameter;
//debug=createPackage;
//debug=aliases;
//debug=lookup;
//debug=file;
//debug=writeFile;

struct WError
{
	private import std.stdio;

	int lineNumber;
	int code;
	string filename;
	string message;


	static WError* create(string filename, int lineNumber, int code, string message)
	{
		WError* error = new WError;
		error.lineNumber = lineNumber;
		error.code = code;
		error.filename = filename;
		error.message = message;
		return error;
	}

	void print ()
	{
		writefln("%s(%s), code %s: %s.", filename, lineNumber, code, message);
	}
}


private import utils.WrapperIF;
private import utils.HTODConvert;


/*
Paths:
  outputRoot: Where all the wrapper files go.
  srcDir: Wrapper files subdir (src vs srcgl)
  inputRoot: Where the html files are
  apiRoot: Where the API files are

  buildDir: Where the build files go.
  bindingsDir: Where the C Bindings files go.

*/

string joinRootDirFile(string root, string dir, string file)
{
	return std.path.buildPath(std.path.buildPath(root,dir),file);
}

//Moved here because of dsss:
private import utils.DefReader;
private import utils.GtkDClass;
private import utils.convparms;
private import utils.IndentedStringBuilder;

/**
 * converts and wrap the GTK libs
 */
public class GtkWrapper : WrapperIF
{
	private import std.file;
	private import std.path;
	private import std.stdio;
	private import std.string;
	private import std.array;

	private string buildText;   /// to build the build.d
	private string buildTextLibs;   /// to build the build.d libs

	string srcOut = "src";      /// the src output directory
	string srcDir;
	string apiRoot;
	string inputRoot;
	string outputRoot;
	string buildDir = "build";
	string buildPath;
	string buildFile =  "gtkD.d";
	string bindingsDir;

	public static string license;

	private bool currIncludeComments;

	enum {

		ERR_NONE = 1000,
		ERR_UNKNOWNE,
		ERR_NO_LICENSE,
		ERR_INVALID_ALIAS,
		ERR_NO_IN_ROOT,
		ERR_NO_OUT_ROOT,
		ERR_COPY_FILE,
		ERR_FILE_DEFINITION,
		ERR_CREATE_PACKAGE,
	}

	string[string] aliases;

	string[string] enumTypes;

	DefReader defReader;


	string[string] packages;

	WError*[] errors;

	private string[] externalDeclarations;  /// the information to build the loader tables

	private string[] collectedAliases;  /// public, module level type aliases
	private string[] collectedEnums;    /// public, module level definitions of enums
	private string[] stockEnums;        /// special enums for StockID
	private string[] stockChars;        /// the string values for StockIDs
	private string[] gTypes;            /// special enums for G_TYPE_*
	private string[] collectedStructs;  /// public, module level definitions of structs
	private string[] collectedTypes;    /// public, module level definitions of other types
	private string[] collectedFuncts;   /// public, module level definitions of functions
	private string[] collectedUnions;   /// public, module level definitions of unions
	private string[] collectedConstants;/// public, module level type contants

	private string[] lookupTypedefs;    /// lookup file definitions to be included on the typedefs.d
	private string[] lookupAliases;     /// lookup file aliases definitions
	private string[] lookupEnums;       /// lookup file enum definitions
	private string[] lookupStructs;     /// lookup file struct definitions
	private string[] lookupTypes;       /// lookup file type definitions
	private string[] lookupFuncts;      /// lookup file functs definitions
	private string[] lookupUnions;      /// lookup file unions definitions
	private string[] lookupConstants;   /// lookup file constants definitions

	DefReader[] defReaders;

	this(string apiRoot)
	{
		this.apiRoot = apiRoot;
		//srcOut = "src";
		//if (!std.file.exists(std.path.buildPath(outputRoot,srcOut)))
		//{
		//  std.file.mkdir(std.path.buildPath(outputRoot,srcOut));
		//}

	}


	private void startBuildText()
	{
		buildText =
			"/*"
			"\n * Automatically generated build imports from"
			"\n * the initial version generouselly given by:"
			"\n * John Reimer"
			"\n */"
			"\n"
			"\nmodule build;"
			"\n"
			"\nversion( build )"
			"\n{"
			"\n pragma (nolink);"
			"\n"
			"\n version (Windows)     pragma (target, \"GtkD.lib\"  );"
			"\n version (linux)   pragma (target, \"libgtkd.a\" );"
			"\n}"
			"\n"
			;

		buildTextLibs.length = 0;

	}

	public void writeBuildText()
	{
		string outfile;

		buildPath = std.path.buildPath(std.path.buildPath(outputRoot,srcDir),buildDir);
		if (!std.file.exists(buildPath))
		{
			std.file.mkdir(buildPath);

		}
		outfile = std.path.buildPath(buildPath,buildFile);
		writefln("writeBuildText: %s",outfile);

		std.file.write(outfile, buildText~"\n\n"~buildTextLibs);
	}

	int process(string apiLookupDefinition)
	{

		startBuildText();

		int status = ERR_NONE;
		defReader = new DefReader(std.path.buildPath(apiRoot,apiLookupDefinition));

		if ( status==ERR_NONE && "license" == defReader.next() )
		{
			loadLicense();
		}
		else
		{
			status = ERR_NO_LICENSE;
			errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status, "Missing license as the first definition");
		}

		if ( "includeComments" == defReader.next() )
		{
			currIncludeComments = defReader.getValueBit();
			defReader.next();
		}

		debug(aliases) writefln("key before alias = ",defReader.getKey());
		while ( "alias" == defReader.getKey() )
		{
			status = loadAA(aliases, defReader, errors);
			defReader.next();
		}

		while ( "enumType" == defReader.getKey() )
		{
			status = loadAA(enumTypes, defReader, errors);
			defReader.next();
		}

		debug(aliases) writefln("key after alias = ",defReader.getKey());

		debug(aliases) foreach(string key ; aliases.keys.sort)
		{
			writefln("alias %s = %s",key, aliases[key]);
		}
		if ( status==ERR_NONE && "inputRoot" == defReader.getKey() )
		{
			inputRoot = defReader.getValue();
		}
		else
		{
			status = ERR_NO_IN_ROOT;
			errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status, "Cannot determine input root");
		}

		if ( status==ERR_NONE && "outputRoot" == defReader.next() )
		{
			outputRoot = defReader.getValue();
		}
		else
		{
			status = ERR_NO_OUT_ROOT;
			errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status, "Cannot determine output root");
		}

		string key = defReader.next();

		while ( status==ERR_NONE && ( "srcdir" ==  key ))
		{
			srcDir = defReader.getValue();
			string chkdir = std.path.buildPath(outputRoot,srcDir);
			if (!std.file.exists(chkdir))
			{
				std.file.mkdir(chkdir);
			}
			key = defReader.next();
			while ( status==ERR_NONE && ( "package" ==  key || "bind" == key ))
			{

				status = createPackage(outputRoot, defReader.getValue());
				key = defReader.next();
			}
		}



		if ( status==ERR_NONE )
		{
			string pack;
			string outPack;
			string prevPack;
			while ( status==ERR_NONE && defReader !is null
					//&& ("wrap" == defReader.getKey() || "lookup" == defReader.getKey())
				  )
			{
				debug(lookup)writefln("(%s) %s=%s", defReader.getFileName(), defReader.getKey(), defReader.getValue() );
				switch ( defReader.getKey() )
				{
					case "alias": loadAA(aliases, defReader, errors); defReader.next(); break;
					case "addTypedefs": lookupTypedefs ~= loadTextMultiLine("addTypedefs"); defReader.next();break;
					case "addAliases": lookupAliases ~= loadTextMultiLine("addAliases"); defReader.next();break;
					case "addEnums": lookupEnums ~= loadTextMultiLine("addEnums"); defReader.next();break;
					case "addStructs": lookupStructs ~= loadTextMultiLine("addStructs"); defReader.next();break;
					case "addTypes": lookupTypes ~= loadTextMultiLine("addTypes"); defReader.next();break;
					case "addFuncts": lookupFuncts ~= loadTextMultiLine("addFuncts"); defReader.next();break;
					case "addUnions": lookupUnions ~= loadTextMultiLine("addUnions"); defReader.next();break;
					case "addConstants": lookupConstants ~= loadTextMultiLine("addConstants"); defReader.next();break;
					case "enumType": loadAA(enumTypes, defReader, errors); defReader.next(); break;
					case "srcout": srcOut =
								   defReader.getValue();defReader.next(); break;
					case "srcdir": srcDir = defReader.getValue();
								   defReader.next();
					case "bindDir": bindingsDir = defReader.getValue();
									defReader.next();break;
					case "wrap":
									//package = key packagename
									//        = pack outpack
									pack = defReader.getValue();

									outPack = packages[pack];
									debug(lookup)writefln("wrap %s", outPack);
									if ( outPack !is null )
									{
										buildText ~= "\n";
										if ( outPack != "lib" )
										{
											buildTextLibs ~= "private import "~bindingsDir~"."~outPack~";\n";
										}
										if ( outPack == "glgtk" )
										{
											buildTextLibs ~= "private import "~bindingsDir~".gl;\n";
											buildTextLibs ~= "private import "~bindingsDir~".glu;\n";
										}
										status = wrapFile(pack, outPack);
									}
									if ( prevPack.length>0 && outPack!=prevPack )
									{
										buildTypedefs(outPack);
										buildLoaderTable(outPack, externalDeclarations);
										externalDeclarations.length = 0;
									}
									prevPack = outPack;
									break;

					case "lookup":
									defReaders ~= defReader;
									defReader = new DefReader(std.path.buildPath(apiRoot,defReader.getValue()));
									defReader.next();
									debug(lookup)writefln("lookup on file %s (%s=%s)", defReader.getFileName(), defReader.getKey(), defReader.getValue() );
									break;

					case "htod":
									// not as clean as lookup...
									// WARNING!!! writefln's are needed to avoid hang.
									writefln("start htod");
									new
										HTODConvert(defReader.getValue(),outputRoot,apiRoot);
									writefln("end htod");
									defReader.next();
									break;

					default:
									if ( defReader.getKey().length == 0 )
									{
										if ( defReaders.length > 0 )
										{
											defReader = defReaders[defReaders.length-1];
											defReaders.length = defReaders.length -1;
											debug(lookup)writefln("lookup back to %s (%s=%s)", defReader.getFileName(), defReader.getKey(), defReader.getValue() );
											defReader.next();
											debug(lookup)writefln("lookup next == %s (%s=%s)", defReader.getFileName(), defReader.getKey(), defReader.getValue() );
										}
										else
										{
											defReader = null;
										}
									}
									break;
				}
				debug(lookup)if(defReader!is null)writefln("loop (%s) %s=%s", defReader.getFileName(), defReader.getKey(), defReader.getValue() );
			}
		}
		else
		{
			//writefln("status = %s",status);
		}

		return status;
	}

	/**
	 * Creates an entry on a string[string] associative array
	 * Params:
	 *      aa =
	 *      defReader =
	 * Returns:
	 */
	private static int loadAA(ref string[string] aa, DefReader defReader, WError*[] errors = null)
	{
		int status = ERR_NONE;
		string[] vals = std..string.split(defReader.getValue());
		if ( vals.length == 1 )
		{
			vals ~= "";
		}
		if ( vals.length == 2 )
		{
			aa[vals[0]] = vals[1];
			debug(aa) writefln("added alias %s = %s", vals[0], vals[1]);
		}
		else
		{
			status = ERR_INVALID_ALIAS;
			if ( errors !is null )
			{
				errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status, "Invalid alias");
			}
		}
		return status;
	}

	/**
	 * Creates an entry on a string[][string] associative array
	 * Params:
	 *      aa =
	 *      defReader =
	 * Returns:
	 */
	private static int loadAA(ref string[][string] aa, DefReader defReader, WError*[] errors = null)
	{
		int status = ERR_NONE;
		string[] vals = std..string.split(defReader.getValue());
		if ( vals.length == 1 )
		{
			vals ~= "";
		}
		if ( vals.length == 2 )
		{
			aa[vals[0]] ~= vals[1];
			debug(aa) writefln("added alias %s = %s", vals[0], vals[1]);
		}
		else
		{
			status = ERR_INVALID_ALIAS;
			if ( errors !is null )
			{
				errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status, "Invalid alias");
			}
		}
		return status;
	}

	/**
	 * Creates an entry on a string[][string] associative array
	 * Params:
	 *      aa =
	 *      defReader =
	 * Returns:
	 */
	private static int loadAAA(ref string[string][string] aa, DefReader defReader, WError*[] errors = null)
	{
		int status = ERR_NONE;
		string[] vals = std..string.split(defReader.getValue());
		if ( vals.length == 1 )
		{
			vals ~= "";
		}
		if ( vals.length == 2 )
		{
			vals ~= "";
		}
		if ( vals.length == 3 )
		{
			aa[vals[0]][vals[1]] ~= vals[2];
			debug(aa) writefln("added alias [%s][%s] = %s", vals[0], vals[1], vals[2]);
		}
		else
		{
			status = ERR_INVALID_ALIAS;
			if ( errors !is null )
			{
				errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status, "Invalid alias");
			}
		}
		return status;
	}

	private string loadLicense()
	{
		license = loadText("license");
		return license;
	}

	private string loadText(string key)
	{
		string text;

		while ( key!=defReader.next(false) && "end"!=defReader.getValue() )
		{
			if ( text.length > 0 )
			{
				text ~= "\n" ~ defReader.getFullLine();
			}
			else
			{
				text ~= defReader.getFullLine();
			}
		}

		return text;
	}

	private string[] loadTextMultiLine(string key)
	{
		string[] text;

		while ( key!=defReader.next(false) && "end"!=defReader.getValue() )
		{
			text ~= defReader.getFullLine();
		}

		return text;
	}

	private int copyFile(string fromDir, string toDir, string fileName)
	{
		debug(writeFile)writefln("GtkWrapper.copyFile %s", fileName);
		int status = ERR_NONE;
		debug(file)writefln("(1)GtkWrapper.copyFile %s %s", fromDir, fileName);
		void[] text = std.file.read(std.path.buildPath(fromDir, fileName));
		try
		{
			//debug(copyFile)
			writefln("copying file [%s] to [%s]", std.path.buildPath(fromDir, fileName), std.path.buildPath(toDir, fileName));
			if (!std.file.exists(toDir))
			{
				std.file.mkdir(toDir);
			}
			std.file.write(std.path.buildPath(toDir, fileName), text);
		}
		catch ( Exception e)
		{
			status = ERR_COPY_FILE;
			errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status, "Cannot copy  file "~fileName);
		}

		writefln("Wrappde %s", fileName);

		return status;
	}

	private int wrapFile(string pack, string outPack)
	{
		debug(file)writefln("GtkWrapper.wrapFile pack=%s outPack=%s", pack, outPack);
		int status = ERR_NONE;

		GtkDClass gtkDClass;

		ConvParms* convParms = new ConvParms;

		string text;

		string key = defReader.next();

		string keys = " file text struct realStruct ctorStruct class template interface extend implements prefix strictPrefix"
			" openFile mergeFile closeFile outFile"
			" copy import import(tango) structWrap alias moduleAlias override"
			" noprefix nostruct nocode nosignal"
			" code interfaceCode"
			" srcout out inout array"
			;
		if (outPack == "lib") {string tmp = pack; pack = outPack; outPack = tmp;} //undo Bind hack...oupPack now holds bind dir.
		convParms.outPack = outPack;
		convParms.bindDir = bindingsDir;

		while ( std..string.indexOf(keys, key) > 0 )
		{
			debug(wrapParameter)writefln("wrapFile [%s] = %s", key, defReader.getValue());
			switch ( key )
			{
				case "copy": status = copyFile(apiRoot,std.path.buildPath(srcOut,outPack),defReader.getValue());
							 buildTextLibs ~= "private import " ~outPack~ "." ~defReader.getValue()[0..$-2]~ ";\n";
							 break;
				case "srcout": srcOut = defReader.getValue(); break;
				case "struct": convParms.strct = defReader.getValue(); break;
				case "realStruct": convParms.realStrct = defReader.getValue(); break;
				case "ctorStruct": convParms.ctorStrct = defReader.getValue(); break;
				case "class": convParms.clss = defReader.getValue(); break;
				case "extend": convParms.extend = defReader.getValue(); break;
				case "implements": convParms.impl ~= defReader.getValue(); break;
				case "template": convParms.templ ~= defReader.getValue(); break;
				case "prefix": convParms.prefixes ~= defReader.getValue(); break;
				case "strictPrefix": convParms.strictPrefix = defReader.getValueBit(); break;
				case "noprefix": convParms.noPrefixes ~= defReader.getValue(); break;
				case "nocode": convParms.noCode ~= defReader.getValue(); break;
				case "nosignal": convParms.noSignals ~= defReader.getValue(); break;
				case "nostruct": convParms.noStructs ~= defReader.getValue(); break;
				case "import": convParms.imprts ~= defReader.getValue(); break;
				case "import(tango)": /*ignore for now*/defReader.getValue(); break;
				case "structWrap": loadAA(convParms.structWrap, defReader, errors); break;
				case "alias": loadAA(convParms.aliases, defReader, errors); break;
				case "moduleAlias": loadAA(convParms.mAliases, defReader, errors); break;
				case "override": convParms.overrides ~= defReader.getValue(); break;
				case "out": loadAA(convParms.outParms, defReader, errors); break;
				case "inout": loadAA(convParms.inoutParms, defReader, errors); break;
				case "array": loadAAA(convParms.array, defReader, errors); break;
				case "text":
							  convParms.text ~= loadTextMultiLine("text");
							  break;
				case "code":
							  convParms.classCode ~= loadText("code");
							  break;
				case "interfaceCode":
							  convParms.interfaceCode ~= loadText("interfaceCode");
							  break;

				case "openFile":
							  gtkDClass = openFile(outPack, text, convParms);
							  text.length = 0;
							  break;
				case "mergeFile":
							  gtkDClass.mergeGtkDClass(text, convParms);
							  text.length = 0;
							  break;
				case "closeFile":
							  buildText ~= "\nprivate import "
								  ~convParms.outPack~"."
								  ~defReader.getValue()~";";
							  closeFile(text, gtkDClass, convParms);
							  text.length = 0;
							  break;
				case "interface":
							  convParms.interf = defReader.getValue();
							  string saveClass = convParms.clss;
							  string[] saveTempl = convParms.templ;
							  convParms.templ.length = 0;
							  convParms.outFile = convParms.interf;
							  convParms.isInterface = true;
							  buildText ~= "\nprivate import "
								  ~convParms.outPack~"."
								  ~defReader.getValue()~";";
							  outFile(outPack, text, convParms);
							  convParms.clss = saveClass;
							  convParms.templ = saveTempl;
							  // mark not interface (anymore)
							  convParms.isInterface = false;
							  // as outFile is always the last definition
							  // there is no need to restore it
							  break;
				case "outFile":
							  buildText ~= "\nprivate import "
								  ~convParms.outPack~"."
								  ~defReader.getValue()~";";
							  outFile(outPack, text, convParms);
							  break;
				case "file":
							  convParms.inFile = std..string.strip(defReader.getValue());
							  if ( convParms.inFile.length > 0 )
							  {
								  if ( startsWith(convParms.inFile, "/") )
								  {
									  debug(file)writefln("GtkWrapper.wrapFile convParms:\n%s", convParms.toString());
									  debug(file)writefln("GtkWrapper.wrapFile convParms:\n%s", defReader.toString());
									  debug(file)writefln("(2)GtkWrapper.wrapFile %s", convParms.inFile);
									  text = cast(string) std.file.read(convParms.inFile);
								  }
								  else
								  {
									  debug(file)writefln("(3)GtkWrapper.wrapFile %s", convParms.inFile);
									  text = cast(string) std.file.read(std.path.buildPath(std.path.buildPath(inputRoot,pack),convParms.inFile));
								  }
							  }
							  else
							  {
								  text.length = 0;
							  }
							  break;
				default:
							  status = ERR_FILE_DEFINITION;
							  errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status, "Invalid file definition");
							  break;
			}
			key = defReader.next();
		}

		return status;
	}

	/**
	 * Opens, reads and closes a file
	 * Params:
	 *      outPack =
	 *      text =
	 *      convParms =
	 */
	private void outFile(string outPack, string text, ConvParms* convParms)
	{
		GtkDClass gtkDClass = openFile(outPack, text, convParms);
		closeFile("", gtkDClass, convParms);
	}

	/**
	 * Opens and reads a file
	 * Params:
	 *      outPack =
	 *      text =
	 *      convParms =
	 * Returns:
	 */
	private GtkDClass openFile(string outPack, string text, ConvParms* convParms)
	{
		convParms.outFile = defReader.getValue();
		debug(wrapFile)writefln("######### gtkDClass for %s.%s (%s)
				bound at %s", outPack, convParms.clss,
				convParms.outFile,convParms.bindDir);
		GtkDClass gtkDClass = new GtkDClass(this);
		convParms.bindDir = bindingsDir;
		gtkDClass.openGtkDClass(text, convParms);

		return gtkDClass;
	}

	private void closeFile(string text, GtkDClass gtkDClass, ConvParms* convParms)
	{
		debug(writeFile)writefln("GtkWrapper.closeFile %s",
				gtkDClass.getOutFile(outputRoot, srcDir));
		string gtkDText = gtkDClass.closeGtkDClass(text, convParms);
		string writeDir = std.path.buildPath(outputRoot, srcDir);
		if ( gtkDClass.getError() == 0 )
		{
			if (!std.file.exists(writeDir))
			{
				std.file.mkdir(writeDir);
			}
			std.file.write(gtkDClass.getOutFile(outputRoot,srcDir),gtkDText);
		}
		writefln("gtk Wrapped %s", gtkDClass.getOutFile(outputRoot, srcDir));
		if ( !convParms.isInterface )
		{
			convParms.clearAll();
		}

		externalDeclarations ~= gtkDClass.getExternalDeclarations();
		collectedAliases ~= gtkDClass.getAliases();
		collectedEnums ~=   gtkDClass.getEnums();
		collectedFuncts ~=  gtkDClass.getFuncts();
		collectedStructs ~= gtkDClass.getStructs();
		collectedTypes ~=   gtkDClass.getTypes();
		collectedUnions ~=  gtkDClass.getUnions();
		collectedConstants ~=   gtkDClass.getConstants();
		stockEnums ~= gtkDClass.getStockEnums();
		stockChars ~= gtkDClass.getStockChars();
		gTypes ~= gtkDClass.getGTypes();
	}

	/**
	 * Assumes input and output packages contains no spaces and are separated by a space
	 * Params:
	 *      outputRoot =
	 *      pack =
	 * Returns:
	 */
	private int createPackage(string outputRoot, string packagevalue)
	{
		int status = ERR_NONE;

		string[] packages = std..string.split(packagevalue, " ");
		string packageDir;

		if ( packages.length == 1 && "bind" == defReader.getKey() )
		{
			packages ~="lib";
			packageDir = packages[0];
		}
		else if ( packages.length == 2 && "package" == defReader.getKey() )
		{
			packageDir = packages[1];
			// nothing here
		}
		else
		{
			status = ERR_CREATE_PACKAGE;
		}

		if ( status==ERR_NONE )
		{
			debug(createPackage)writefln("adding (%s) %s %s", defReader.getKey(), packages[0], packages[1]);
			this.packages[packages[0]] = packages[1];
			try
			{
				std.file.mkdir(joinRootDirFile(outputRoot,srcDir,packageDir));
			}
			catch ( Exception e)
			{
				//status = 4;
				//errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status, "Cannot create src package: "~pack);
			}
			try
			{
				std.file.mkdir(joinRootDirFile(outputRoot,"obj",
							packageDir));
			}
			catch ( Exception e)
			{
				//status = 5;
				//errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status, "Cannot create obj package: "~pack);
			}
		}

		if ( status != ERR_NONE )
		{
			errors ~= WError.create(defReader.fileName, defReader.getLineNumber(), status,
					"Invalid package/src definition (need in and out packages or lib name): "~packagevalue);
		}

		return status;
	}

	public void printErrors()
	{
		writefln("printing %s errors", errors.length);
		foreach ( WError* error ; errors)
		{
			error.print();
		}
	}

	public string getLicense()
	{
		return license;
	}

	public string[string] getAliases()
	{
		return aliases;
	}

	public string[string] getEnumTypes()
	{
		return enumTypes;
	}

	public bool includeComments()
	{
		return currIncludeComments;
	}

	void buildLoaderTable(string loaderTableName, string[] declarations)
	{
		string externalText = license;

		externalText ~= "\nmodule "~bindingsDir~"."~loaderTableName~";\n"
			"\nversion(Tango)"
			"\n	private import tango.stdc.stdio;"
			"\nelse"
			"\n	private import std.stdio;\n"
			"\nprivate import "~bindingsDir~"." ~loaderTableName~"types;";

		if ( loaderTableName == "glib" )
		{
			externalText ~= "\nprivate import "~bindingsDir~".gthreadtypes;";
		}
		if ( loaderTableName == "gdk" || loaderTableName == "pango" )
		{
			externalText ~= "\nprivate import "~bindingsDir~".cairotypes;";
		}

		if ( loaderTableName != "gl" &&
				loaderTableName != "glu" &&
				loaderTableName != "glx"
		   )
		{
			externalText ~= "\nprivate import gtkc.Loader;"
				"\nprivate import gtkc.paths;\n"
				"\nmixin( _shared ~ \"static this()"
				"\n{";

			string library = "LIBRARY."~ toUpper(loaderTableName);

			//Returns an array of libraries to try and link with.
			string getLibrary(string funct)
			{
				if ( GtkDClass.startsWith(funct, "gdk") )
					return library ~ ", LIBRARY.GDKPIXBUF";
				else if	( GtkDClass.startsWith(funct, "pango_cairo") )
					return library ~ ", LIBRARY.PANGOCAIRO";
				else if	( GtkDClass.startsWith(funct, "g_module") )
					return library ~ ", LIBRARY.GMODULE";
				else
					return library;
			}
			
			string getUtfPostfix(string funct)
			{
				if ( funct == "g_module_open" ||
					funct == "g_module_name" )
					return "\"~ _utfPostfix ~\"";
					
				return "";
			}

			//Generate the static this, where the linking takes place
			foreach ( string declaration; declarations )
			{
				string dec = std..string.strip(declaration);
				sizediff_t pos = std..string.lastIndexOf(dec,')');

				if (dec.length == 0)
					continue;

				if ( GtkDClass.startsWith(dec, "//") )
					externalText ~= "\n\t"~ dec ~"\n\n";

				if ( pos > 0 )
				{
					externalText ~= '\t';

					if ( dec[0]=='#' )
					{
						externalText ~= "// ";
					}
					else
					{
						string functName = std..string.strip(dec[pos+1..$]);
						if ( functName.length > 0 )
						{
							externalText ~= "Linker.link("~ functName ~", \\\""~ functName ~ getUtfPostfix(functName) ~"\\\", "~ getLibrary(functName) ~");";
						}
					}
					externalText ~= '\n';
				}
			}

			externalText ~= "}\");\n\n"
				"mixin( gshared ~\"extern(C)\n"
				"{";

			//Generate the functions.
			foreach(string declaration ; declarations)
			{
				string dec = std..string.strip(declaration);

				if (dec.length == 0)
					continue;

				if ( GtkDClass.startsWith(dec, "//") )
				{
					externalText ~= "\n\t"~ dec ~"\n\n";
					continue;
				}

				if ( loaderTableName == "glib" || loaderTableName == "pango" ) 
					dec = replace(dec, "FILE*", "void*"); //Phobos workaround.

				sizediff_t pos = std..string.lastIndexOf(dec,')') + 1;
				externalText ~= '\t';

				if ( dec[0]=='#' )
					externalText ~= "// ";

				if ( !GtkDClass.startsWith(dec, "//") && dec[0]!='#' )
					externalText ~= dec[0..pos] ~" c_"~ dec[pos..$] ~';';
				else
					externalText ~= dec;

				externalText ~= '\n';
			}

			externalText ~= "}\");\n";

			//Generate the aliases.
			foreach ( string declaration; declarations )
			{
				string dec = std..string.strip(declaration);
				sizediff_t pos = std..string.lastIndexOf(dec,')');

				if (dec.length == 0)
					continue;

				if ( GtkDClass.startsWith(dec, "//") )
					externalText ~= '\n'~ dec ~"\n\n";

				if ( pos > 0 )
				{
					if ( dec[0]=='#' )
					{
						externalText ~= "// ";
					}
					else
					{
						string functName = std..string.strip(dec[pos+1..$]);
						if ( functName.length > 0 )
						{
							externalText ~= "alias c_"~ functName ~"  "~ functName ~";";
						}
					}
					externalText ~= '\n';
				}
			}
		}

		string pathname = joinRootDirFile(std.path.buildPath(outputRoot,srcDir),bindingsDir,loaderTableName~".d");
		std.file.write(pathname,externalText);
	}

	void buildTypedefs(string outPack)
	{

		string def = license;
		def ~= "module "~bindingsDir~"."~outPack~"types;\n\n";

		auto indenter = new IndentedStringBuilder();

		def ~= indenter.format(lookupTypedefs);

		if ( gTypes.length > 0 )
		{
			def ~= "\n\n// G_TYPE_*";
			def ~= "\nenum GType : size_t";
			def ~= "\n{\n";
			indenter.setIndent("\t");
			def ~= indenter.format(gTypes);
			def ~= "\n}\n\n";
		}
		indenter.setIndent("");

		def ~= indenter.format(lookupConstants);
		def ~= indenter.format(lookupAliases);
		def ~= indenter.format(collectedAliases);

		indenter.setIndent("");
		def ~= indenter.format(lookupEnums);
		def ~= indenter.format(collectedEnums);

		indenter.setIndent("");
		def ~= indenter.format(lookupStructs);
		def ~= indenter.format(collectedStructs);

		indenter.setIndent("");
		def ~= indenter.format(lookupTypes);
		def ~= indenter.format(collectedTypes);

		indenter.setIndent("");
		def ~= indenter.format(lookupFuncts);
		def ~= indenter.format(collectedFuncts);

		indenter.setIndent("");
		def ~= indenter.format(lookupUnions);
		def ~= indenter.format(collectedUnions);

		if ( stockEnums.length > 0 )
		{
			def ~= "\n\n// StockIDs";
			def ~= "\nenum StockID";
			def ~= "\n{\n";
			indenter.setIndent("\t");
			def ~= indenter.format(stockEnums);
			def ~= "\n}";
			def ~= "\n\n// Stock strings";
			def ~= "\nstring[] StockDesc = ";
			def ~= "\n[";
			indenter.setIndent("\t");
			def ~= indenter.format(stockChars);
			def ~= "\n];";
		}
		indenter.setIndent("");
		def ~= indenter.format(collectedConstants);

		string pathname =
			joinRootDirFile(std.path.buildPath(outputRoot,srcDir), bindingsDir, outPack~"types.d");
		std.file.write(pathname,def);

		lookupTypedefs.length = 0;
		lookupAliases.length = 0;
		lookupEnums.length = 0;
		lookupStructs.length = 0;
		lookupTypes.length = 0;
		lookupFuncts.length = 0;
		lookupUnions.length = 0;
		lookupConstants.length = 0;

		collectedAliases.length = 0;
		collectedEnums.length = 0;
		collectedStructs.length = 0;
		collectedTypes.length = 0;
		collectedFuncts.length = 0;
		collectedUnions.length = 0;
		collectedConstants.length = 0;

		stockEnums.length = 0;
		stockChars.length = 0;
		gTypes.length = 0;
	}
}

int main()
{
	GtkWrapper wrapper = new GtkWrapper("./"); //Run gtkwrapper from the project directory... Make this a config option later.
	int status = wrapper.process("APILookup.txt");
	wrapper.printErrors();
	if ( wrapper.errors.length == 0 )
	{
		wrapper.writeBuildText();
	}
	return status;
}