/*************************************************************************/
/*  config_file.cpp                                                      */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "config_file.h"
#include "os/keyboard.h"
#include "os/file_access.h"
#include "variant_parser.h"

StringArray ConfigFile::_get_sections() const {

	List<String> s;
	get_sections(&s);
	StringArray arr;
	arr.resize(s.size());
	int idx=0;
	for(const List<String>::Element *E=s.front();E;E=E->next()) {

		arr.set(idx++,E->get());
	}

	return arr;
}

StringArray ConfigFile::_get_section_keys(const String& p_section) const{

	List<String> s;
	get_section_keys(p_section,&s);
	StringArray arr;
	arr.resize(s.size());
	int idx=0;
	for(const List<String>::Element *E=s.front();E;E=E->next()) {

		arr.set(idx++,E->get());
	}

	return arr;

}


void ConfigFile::set_value(const String& p_section, const String& p_key, const Variant& p_value){

	if (p_value.get_type()==Variant::NIL) {
		//erase
		if (!values.has(p_section))
			return; // ?
		values[p_section].erase(p_key);
		if (values[p_section].empty()) {
			values.erase(p_section);
		}

	} else {
		if (!values.has(p_section)) {
			values[p_section]=Map<String, Variant>();
		}

		values[p_section][p_key]=p_value;

	}

}
Variant ConfigFile::get_value(const String& p_section, const String& p_key, Variant p_default) const {

	ERR_FAIL_COND_V(!values.has(p_section),p_default);
	ERR_FAIL_COND_V(!values[p_section].has(p_key),p_default);
	return values[p_section][p_key];

}

bool ConfigFile::has_section(const String& p_section) const {

	return values.has(p_section);
}
bool ConfigFile::has_section_key(const String& p_section,const String& p_key) const {

	if (!values.has(p_section))
		return false;
	return values[p_section].has(p_key);
}

void ConfigFile::get_sections(List<String> *r_sections) const{

	for(const Map< String, Map<String, Variant> >::Element *E=values.front();E;E=E->next()) {
		r_sections->push_back(E->key());
	}
}
void ConfigFile::get_section_keys(const String& p_section,List<String> *r_keys) const{

	ERR_FAIL_COND(!values.has(p_section));

	for(const Map<String, Variant> ::Element *E=values[p_section].front();E;E=E->next()) {
		r_keys->push_back(E->key());
	}

}



Error ConfigFile::save(const String& p_path){

	Error err;
	FileAccess *file = FileAccess::open(p_path,FileAccess::WRITE,&err);

	if (err) {
		if (file)
			memdelete(file);
		return err;
	}


	for(Map< String, Map<String, Variant> >::Element *E=values.front();E;E=E->next()) {

		if (E!=values.front())
			file->store_string("\n");
		file->store_string("["+E->key()+"]\n\n");

		for(Map<String, Variant>::Element *F=E->get().front();F;F=F->next()) {

			String vstr;
			VariantWriter::write_to_string(F->get(),vstr);
			file->store_string(F->key()+"="+vstr+"\n");
		}
	}

	memdelete(file);

	return OK;
}


Error ConfigFile::load(const String& p_path) {

	Error err;
	FileAccess *f= FileAccess::open(p_path,FileAccess::READ,&err);

	if (!f)
		return ERR_CANT_OPEN;

	VariantParser::StreamFile stream;
	stream.f=f;

	String assign;
	Variant value;
	VariantParser::Tag next_tag;

	int lines=0;
	String error_text;

	String section;

	while(true) {

		assign=Variant();
		next_tag.fields.clear();
		next_tag.name=String();

		err = VariantParser::parse_tag_assign_eof(&stream,lines,error_text,next_tag,assign,value,NULL,true);
		if (err==ERR_FILE_EOF) {
			memdelete(f);
			return OK;
		}
		else if (err!=OK) {
			ERR_PRINTS("ConfgFile::load - "+p_path+":"+itos(lines)+" error: "+error_text);
			memdelete(f);
			return err;
		}

		if (assign!=String()) {
			set_value(section,assign,value);
		} else if (next_tag.name!=String()) {
			section=next_tag.name;
		}
	}

	memdelete(f);

	return OK;
}



void ConfigFile::_bind_methods(){

	ClassDB::bind_method(_MD("set_value","section","key","value"),&ConfigFile::set_value);
	ClassDB::bind_method(_MD("get_value:Variant","section","key","default"),&ConfigFile::get_value,DEFVAL(Variant()));

	ClassDB::bind_method(_MD("has_section","section"),&ConfigFile::has_section);
	ClassDB::bind_method(_MD("has_section_key","section","key"),&ConfigFile::has_section_key);

	ClassDB::bind_method(_MD("get_sections"),&ConfigFile::_get_sections);
	ClassDB::bind_method(_MD("get_section_keys","section"),&ConfigFile::_get_section_keys);

	ClassDB::bind_method(_MD("load:Error","path"),&ConfigFile::load);
	ClassDB::bind_method(_MD("save:Error","path"),&ConfigFile::save);

}


ConfigFile::ConfigFile()
{
}
