/*
 * This file is a part of EZC -- Easy templating in C++
 * and is distributed under the (new) BSD licence.
 * Author: Tomasz Sowa <t.sowa@ttmath.org>
 */

/* 
 * Copyright (c) 2007-2011, Tomasz Sowa
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *    
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *    
 *  * Neither the name Tomasz Sowa nor the names of contributors to this
 *    project may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */


#ifndef headerfile_ezc_pattern
#define headerfile_ezc_pattern

#include <string>
#include "item.h"
#include "functions.h"
#include "stringconv.h"
#include "utf8.h"

#ifdef EZC_USE_WINIX_LOGGER
#include "core/log.h"
#endif


namespace Ezc
{


class Pattern
{
public:

	Pattern();

	/*!
		clearing only the tree
	*/
	void Clear();


	// first we're trying to read a file from directory dir
	// if there is no such a file there then we try read from dir2
	// (the second dir2 can be empty - it will not be used)
	void Directory(const char * dir, const char * dir2 = 0);
	void Directory(const std::string & dir);
	void Directory(const std::string & dir, const std::string & dir2);

	void Directory(const wchar_t * dir, const wchar_t * dir2 = 0);
	void Directory(const std::wstring & dir);
	void Directory(const std::wstring & dir, const std::wstring & dir2);

	void ParseFile(const char * file_name);
	void ParseFile(const std::string & file_name);

	void ParseFile(const wchar_t * file_name);
	void ParseFile(const std::wstring & file_name);


	void ParseString(const char * str);
	void ParseString(const std::string & str);
	void ParseString(const wchar_t * str);
	void ParseString(const std::wstring & str);

	void AllowInclude(bool allow);
	void DeleteWhiteTextItems(bool del);
	void SetIncludeMax(int include_max);

	// files and strings (only char* and std::string) are treated 
	// as UTF-8
	void UTF8(bool utf8);

	void SetCommentary(const char * com_start, const char * com_stop);
	void SetCommentary(const std::string & com_start, const std::string & com_stop);
	void SetCommentary(const wchar_t * com_start, const wchar_t * com_stop);
	void SetCommentary(const std::wstring & com_start, const std::wstring & com_stop);
	
	void CreateMsg(std::wstring & out, const wchar_t * type, const wchar_t * arg = 0);
	static bool IsWhite(wchar_t c);

	Item item_root;

	template<class StreamType>
	void CacheFunctions(Functions<StreamType> & fun)
	{
		CacheFunctions(item_root, fun);
	}

	void ClearCache();

private:

	// the main pointer to the parsed text
	const wchar_t * itext;


	// allowing include tag
	// default: true
	bool allow_include;

	// if true all text-items which have only white characters (with new lines as well)
	// will be deleted - useful in *.txt templates
	// this not actually delete the whole item but only the string
	// the item will be present with an empty string
	// default: false
	bool delete_white_text_items;

	// first we're trying to read a file from 'directory'
	// if there is no such a file there then we try read from 'directory2'
	// we read from these directories only if they are not empty
	std::wstring directory, directory2;

	
	bool input_as_utf8;

	int include_level, include_level_max;



	std::wstring commentary_start, commentary_stop;


	// temporary content for ParseString(const char*) method
	std::wstring string_content;
	
	// temporary object for a file name
	std::wstring file_name;

	// temporary object for a file name
	std::string afile_name;

	// temporary object for a EZC function's parameter
	std::wstring temp_param;

	// temporary object for a EZC function
	Item::Function temp_function;



	void ReadFile(const std::wstring & name, std::wstring & result);
	void ReadFile(const wchar_t * name, std::wstring & result);
	bool HasFileAtBeginning(const wchar_t * path, const wchar_t * file);
	bool IsFileCorrect(const wchar_t * name);
	bool ReadFileFromDir(const std::wstring & dir, const wchar_t * name, std::wstring & result);
	void ReadFile(std::ifstream & file, std::wstring & result);
	void ReadFileContent(std::ifstream & file, std::wstring & result);

	int  ReadCharInText();
	void SkipWhite();
	void CheckWhiteAndDelete(std::wstring & s);
	
	bool IsNameChar(wchar_t c);
	bool IsDigit(wchar_t c);
	bool IsPositiveNumber(const std::wstring & str);

	bool ReadName(std::wstring & name);
	bool ReadString(std::wstring & str);
	bool ReadParams(Item::Function & function);
	bool ReadFunction(Item::Function & function);
	bool ReadFunctions(Item & item);

	void ReadDirectiveIf(Item & item);
	void ReadDirectiveIfno(Item & item);
	void ReadDirectiveIfany(Item & item);
	void ReadDirectiveIfone(Item & item);
	void ReadDirectiveIfanyno(Item & item);
	void ReadDirectiveIfoneno(Item & item);
	void ReadDirectiveIs(Item & item);
	void ReadDirectiveIsno(Item & item);
	void ReadDirectiveIfindex(Item & item);
	void ReadDirectiveFor(Item & item);
	void ReadDirectiveComment(Item & item);
	void ReadDirectiveInclude(Item & item);
	void ReadDirectiveDef(Item & item);
	void ReadDirectiveFilter(Item & item);
	void ReadDirectiveNormal(const std::wstring & name, Item & item);

	void CreateTreeReadItemDirectiveCheckEnding(Item & item);
	void CreateTreeReadItemDirective(Item & item);
	void CreateTreeReadItemText(Item & item);
	bool CreateTreeReadItem(Item & item);
	void CreateTreeReadIf(Item & item);
	void CreateTreeReadFor(Item & item);
	void CreateTree(Item & item);
	void CreateTreeReadInclude(Item & item);
	void CreateTreeReadIncludeSkipAllowFlag(Item & item);


	template<class StreamType>
	void CacheFunctions(Item & item, Functions<StreamType> & fun)
	{
		typename Functions<StreamType>::Function * ezc_fun;

		// one exception (if_index is putting its argument on the functions stack)
		if( item.type != Item::item_ifindex )
		{
			for(size_t f=0; f < item.functions.size() ; ++f)
			{
				if( fun.Find(item.functions[f].name, &ezc_fun) )
				{
					item.functions[f].fun_cache = ezc_fun;
				}
				else
				{
					item.functions[f].fun_cache = 0;

					#ifdef EZC_USE_WINIX_LOGGER
					log << log1 << "Ezc: unknown function: " << item.functions[f].name << logend;
					#endif
				}
			}
		}

		for(size_t i=0; i < item.item_tab.size() ; ++i)
			CacheFunctions(*item.item_tab[i], fun);
	}


	void ClearCache(Item & item);

}; // class Pattern









} // namespace Ezc


#endif