/*
* Copyright (C) 2009 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
*	
* 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 txcap_action.c
 * @brief XCAP actions.
 *
 * @author Mamadou Diop <diopmamadou(at)doubango.org>
 *
 * @date Created: Sat Nov 8 16:54:58 2009 mdiop
 */
#include "tinyxcap/txcap_action.h"

#include "tsk_options.h"
#include "tsk_params.h"
#include "tinyxcap/txcap_selector.h"

/**@defgroup txcap_action_group XDMC (Sending Requests)
*/

#define	TXCAP_MIME_TYPE_ELEMENT			"application/xcap-el+xml" /**< as per rfc 4825 subclause 15.2.1 */
#define	TXCAP_MIME_TYPE_ATTRIBUTE		"application/xcap-att+xml" /**< as per rfc 4825 subclause 15.2.2 */
#define	TXCAP_MIME_TYPE_NS				"application/xcap-ns+xml" /**< as per rfc 4825 subclause 15.2.3 */
#define	TXCAP_MIME_TYPE_ERROR			"application/xcap-error+xml" /**< as per rfc 4825 subclause 15.2.4 */

extern char* __txcap_selector_get_url(const txcap_stack_handle_t* stack, const char* auid_id, va_list* app);


/** Sends HTTP/HTTPS request to the XDMS.
*/
int txcap_action_perform(txcap_stack_handle_t* stack, txcap_action_type_t type, txcap_action_target_t target, ...)
{
	tsk_options_L_t* options = tsk_null;
	tsk_params_L_t* headers = tsk_null;
	char* urlstring = tsk_null;
	thttp_action_t* action;
	thttp_dialog_t* dialog;
	int ret = -1;
	txcap_action_param_type_t curr;
	const char* method = "GET";
	const char* mime_type = tsk_null;
	const char* AUID_STR = tsk_null;
	const void* PAY_PTR = tsk_null;
	size_t PAY_SIZE = 0;
	va_list ap;
	txcap_stack_t* xcap_stack = stack;

	if(!xcap_stack){
		goto bail;
	}
	else{
		xcap_stack = tsk_object_ref(stack);
		options = tsk_list_create();
		headers = tsk_list_create();
	}

	va_start(ap, target);
	while((curr = va_arg(ap, txcap_action_param_type_t)) != txcap_apt_null){
		switch(curr){
			case txcap_apt_option:
				{	/*(thttp_action_option_t)ID_INT, (const char*)VALUE_STR*/
					thttp_action_option_t ID_INT = va_arg(ap, thttp_action_option_t);
					const char* VALUE_STR = va_arg(ap, const char *);
					tsk_options_add_option(&options, ID_INT, VALUE_STR);
					break;
				}
			case txcap_apt_header:
				{	/* (const char*)NAME_STR, (const char*)VALUE_STR */
					const char* NAME_STR = va_arg(ap, const char *);
					const char* VALUE_STR = va_arg(ap, const char *);
					tsk_params_add_param(&headers, NAME_STR, VALUE_STR);
					break;
				}
			case txcap_apt_payload:
				{	/*(const void*)PAY_PTR, (size_t)PAY_SIZE*/
					PAY_PTR = va_arg(ap, const void *);
					PAY_SIZE = va_arg(ap, size_t);
					break;
				}
			case txcap_apt_selector:
				{	/*(const char*)AUID_STR, __VA_ARGS__*/
					AUID_STR = va_arg(ap, const char *);
					if(!urlstring){
						urlstring = __txcap_selector_get_url(stack, AUID_STR, &ap);
					}
					break;
				}
			case txcap_apt_urlstring:
				{	/* (const char*)URI_STR */
					const char* URI_STR = va_arg(ap, const char *);
					if(!urlstring){
						urlstring = tsk_strdup(URI_STR);
					}
					break;
				}
			default:
				{
					TSK_DEBUG_ERROR("NOT SUPPORTED.");
					goto done;
				}
		}/* switch */
	} /* while */

done:
	va_end(ap);

	/* checks urlstring */
	if(!urlstring){
		TSK_DEBUG_ERROR("Failed to compute XCAP URL");
		goto bail;
	}

	/* HTTP method */
	switch(type){
		case txcap_atp_create:
		case txcap_atp_replace:
			method = "PUT"; break;
		case txcap_atp_fetch:
			method = "GET"; break;
		case txcap_atp_delete:
			method = "DELETE"; break;
	}

	/*content-type*/
	switch(target){
		case txcap_atg_element:
			mime_type = TXCAP_MIME_TYPE_ELEMENT; break;
		case txcap_atg_document:
			{
				if(AUID_STR){
					txcap_auid_t* auid;
					if((auid = txcap_auid_get_by_id(xcap_stack->auids, AUID_STR))){
						mime_type = (const char*)auid->mime_type; // (cont char*) do not strdup()
						TSK_OBJECT_SAFE_FREE(auid);
					}
					else{
						TSK_DEBUG_WARN("Failed to find auid with id=%s", AUID_STR);
					}
				}
				break;
			}
		case txcap_atg_attribute:
			mime_type = TXCAP_MIME_TYPE_ATTRIBUTE; break;
	}

	/* HTTP action */
	if((action = thttp_action_create(atype_o_request, urlstring, method, tsk_null))){
		const tsk_list_item_t* item;
		if((dialog = thttp_dialog_new(xcap_stack->http_session))){
			/* copy options */
			tsk_list_foreach(item, options){
				tsk_options_add_option(&action->options, ((const tsk_option_t*)item->data)->id, ((const tsk_option_t*)item->data)->value);
			}
			/* copy action-level headers */
			tsk_list_foreach(item, headers){
				tsk_params_add_param(&action->headers, ((const tsk_param_t*)item->data)->name, ((const tsk_param_t*)item->data)->value);
			}
			/* copy session-level headers ==> will be added by thttp_dialog_send_request()*/
			//--tsk_list_pushback_list(action->headers, ((thttp_session_t*)xcap_stack->http_session)->headers);

			/* Content-Type */
			if(mime_type){
				if(!tsk_params_have_param(action->headers, "Content-Type")){
					tsk_params_add_param(&action->headers, "Content-Type", mime_type);
				}
			}

			/* payload */
			if(PAY_PTR && PAY_SIZE){
				action->payload = tsk_buffer_create(PAY_PTR, PAY_SIZE);
			}
			
			/* performs */
			ret = thttp_dialog_fsm_act(dialog, action->type, tsk_null, action);
			tsk_object_unref(dialog);
		}
		else{
			TSK_DEBUG_ERROR("Failed to create new HTTP/HTTPS dialog.");
			ret = -2;
		}
		TSK_OBJECT_SAFE_FREE(action);
	}

bail:
	TSK_FREE(urlstring);
	TSK_OBJECT_SAFE_FREE(options);
	TSK_OBJECT_SAFE_FREE(headers);
	tsk_object_unref(xcap_stack);
	return ret;
}

