/*
 * Copyright (C) 2010-2015 Mamadou Diop.
 *	
 * This file is part of Open Source Doubango Framework.
 *
 * DOUBANGO 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 3 of the License, or
 * (at your option) any later version.
 *	
 * DOUBANGO 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 DOUBANGO.
 *
 */
 
 
 /**@file tsdp_header_Z.c
  * @brief SDP "z=" header (Time Zones).
  *
  */
 #include "tinysdp/headers/tsdp_header_Z.h"
 
 #include "tsk_debug.h"
 #include "tsk_memory.h"
 #include "tsk_string.h"
 
 #include <string.h>
 
 /***********************************
 *	Ragel state machine.
 */
 %%{
 	machine tsdp_machine_parser_header_Z;
 
 	# Includes
 	include tsdp_machine_utils "./ragel/tsdp_machine_utils.rl";
 	
 	action tag{
 		tag_start = p;
 	}
 
 	action create_zone{
 		if(!zone){
 			zone = tsdp_zone_create_null();
 		}
 	}
 
 	action add_zone{
 		if(zone){
 			tsk_list_push_back_data(hdr_Z->zones,(void**)&zone);
 		}
 	}
 
 	action parse_time{
 		if(zone){
 			TSK_PARSER_SET_INTEGER_EX(zone->time, uint64_t, atoi64);
 		}
 	}
 
 	action parse_typed_time{
 		if(zone){
 			TSK_PARSER_SET_STRING(zone->typed_time);
 		}
 	}
 
 	action shifted{
 		if(zone){
 			zone->shifted_back = tsk_true;
 		}
 	}	
 
 	fixed_len_time_unit	=  	"d" | "h" | "m" | "s";
 
 	time = DIGIT+ >tag %parse_time;
 	typed_time = (DIGIT+ fixed_len_time_unit?) >tag %parse_typed_time;
 
 	Z = 'z' SP* "=" (time SP ("-"%shifted)? typed_time) >create_zone %add_zone 
 		(SP time SP ("-"%shifted)? typed_time)* >create_zone %add_zone;
 	
 	# Entry point
 	main := Z :>CRLF?;
 
 }%%
 
 
 tsdp_header_Z_t* tsdp_header_Z_create(uint64_t time, tsk_bool_t shifted_back, const char* typed_time)
 {
 	return tsk_object_new(TSDP_HEADER_Z_VA_ARGS(time, shifted_back, typed_time));
 }
 
 tsdp_header_Z_t* tsdp_header_Z_create_null()
 {
 	return tsdp_header_Z_create(0L, tsk_false, tsk_null);
 }
 
 
 tsdp_zone_t* tsdp_zone_create(uint64_t time, tsk_bool_t shifted_back, const char* typed_time) 
 {
 	return tsk_object_new(tsdp_zone_def_t, time, shifted_back, typed_time);
 }
 
 tsdp_zone_t* tsdp_zone_create_null()
 {
 	return tsdp_zone_create(0L, tsk_false, tsk_null);
 }
 
 int tsdp_header_Z_tostring(const tsdp_header_t* header, tsk_buffer_t* output)
 {
 	if(header){
 		const tsdp_header_Z_t *Z = (const tsdp_header_Z_t *)header;
 		const tsk_list_item_t *item;
 		const tsdp_zone_t* zone;
 		
 		tsk_list_foreach(item, Z->zones){
 			zone = (const tsdp_zone_t*)item->data;
 			// time  SP ["-"] typed-time
 			tsk_buffer_append_2(output, "%s%llu %s%s",
 				TSK_LIST_IS_FIRST(Z->zones, item) ? "" : " ",
 				zone->time,
 				zone->shifted_back ? "-" : "",
 				zone->typed_time
 			);
 		}
 	}
 
 	return -1;
 }
 
 tsdp_header_Z_t *tsdp_header_Z_parse(const char *data, tsk_size_t size)
 {
 	int cs = 0;
 	const char *p = data;
 	const char *pe = p + size;
 	const char *eof = pe;
 	tsdp_header_Z_t *hdr_Z = tsdp_header_Z_create_null();
 	tsdp_zone_t* zone = tsk_null;
 	
 	const char *tag_start = tsk_null;
 
 	TSK_RAGEL_DISABLE_WARNINGS_BEGIN()
 	%%write data;
 	(void)(tsdp_machine_parser_header_Z_first_final);
 	(void)(tsdp_machine_parser_header_Z_error);
 	(void)(tsdp_machine_parser_header_Z_en_main);
 	%%write init;
 	%%write exec;
 	TSK_RAGEL_DISABLE_WARNINGS_END()
 	
 	if(zone){
 		TSK_OBJECT_SAFE_FREE(zone);
 	}
 
 	if( cs < %%{ write first_final; }%% ){
 		TSK_DEBUG_ERROR("Failed to parse \"z=\" header.");
 		TSK_OBJECT_SAFE_FREE(hdr_Z);
 	}
 	
 	return hdr_Z;
 }
 
 
 
 
 
 
 
 //========================================================
 //	Z header object definition
 //
 
 static tsk_object_t* tsdp_header_Z_ctor(tsk_object_t *self, va_list * app)
 {
 	tsdp_header_Z_t *Z = self;
 	if(Z){
 		TSDP_HEADER(Z)->type = tsdp_htype_Z;
 		TSDP_HEADER(Z)->tostring = tsdp_header_Z_tostring;
 		TSDP_HEADER(Z)->rank = TSDP_HTYPE_Z_RANK;
 		
 		if((Z->zones = tsk_list_create())){
 			uint64_t time = va_arg(*app, uint64_t);
 			unsigned shifted_back = va_arg(*app, unsigned);
 			const char* typed_time = va_arg(*app, const char*);
 
 			if(typed_time){
 				tsdp_zone_t *zone;
 				if((zone = tsdp_zone_create(time, shifted_back, typed_time))){
 					tsk_list_push_back_data(Z->zones,(void**)&zone);
 				}
 			}
 		}
 	}
 	else{
 		TSK_DEBUG_ERROR("Failed to create new Z header.");
 	}
 	return self;
 }
 
 static tsk_object_t* tsdp_header_Z_dtor(tsk_object_t *self)
 {
 	tsdp_header_Z_t *Z = self;
 	if(Z){
 		TSK_OBJECT_SAFE_FREE(Z->zones);
 	}
 	else{
 		TSK_DEBUG_ERROR("Null Z header.");
 	}
 
 	return self;
 }
 static int tsdp_header_Z_cmp(const tsk_object_t *obj1, const tsk_object_t *obj2)
 {
 	if(obj1 && obj2){
 		return tsdp_header_rank_cmp(obj1, obj2);
 	}
 	else{
 		return -1;
 	}
 }
 
 static const tsk_object_def_t tsdp_header_Z_def_s = 
 {
 	sizeof(tsdp_header_Z_t),
 	tsdp_header_Z_ctor,
 	tsdp_header_Z_dtor,
 	tsdp_header_Z_cmp
 };
 
 const tsk_object_def_t *tsdp_header_Z_def_t = &tsdp_header_Z_def_s;
 
 
 
 
 //========================================================
 //	Zone object definition
 //
 
 static tsk_object_t* tsdp_zone_ctor(tsk_object_t *self, va_list * app)
 {
 	tsdp_zone_t *zone = self;
 	if(zone){
 		zone->time = va_arg(*app, uint64_t);
 		zone->shifted_back = va_arg(*app, tsk_bool_t);
 		zone->typed_time = tsk_strdup( va_arg(*app, const char*) );
 	}
 	else{
 		TSK_DEBUG_ERROR("Failed to create new zone object.");
 	}
 	return self;
 }
 
 static tsk_object_t* tsdp_zone_dtor(tsk_object_t *self)
 {
 	tsdp_zone_t *zone = self;
 	if(zone){
 		TSK_FREE(zone->typed_time);
 	}
 	else{
 		TSK_DEBUG_ERROR("Null zone object.");
 	}
 
 	return self;
 }
 
 static const tsk_object_def_t tsdp_zone_def_s = 
 {
 	sizeof(tsdp_zone_t),
 	tsdp_zone_ctor,
 	tsdp_zone_dtor,
 	tsk_null
 };
 
 const tsk_object_def_t *tsdp_zone_def_t = &tsdp_zone_def_s;