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* modification, are permitted provided that the following conditions are met:
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*  - Redistributions of source code must retain the above copyright notice,
*    this list of conditions and the following disclaimer.
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*    contributors may be used to endorse or promote products derived from this
*    software without specific prior written permission.
*
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*******************************************************************************/

/**
 * @author Liang Hou
 */
#include "wsman-faults.h"
#include "wsman-soap.h"
#include "wsman-names.h"
#include "wsman-soap-message.h"
#include "wsman-soap-envelope.h"
#include "wsman-xml-api.h"
#include "wsman-xml.h"
#include "wsman-event-pool.h"
#include "wsman-cimindication-processor.h"

static int isvalidCIMIndicationExport(WsXmlDocH doc){
	if(doc == NULL) return 0;
	WsXmlNodeH node = ws_xml_get_doc_root(doc);
	WsXmlNodeH temp = NULL;
	node = ws_xml_get_child(node, 0, NULL, CIMXML_MESSAGE);
	temp = ws_xml_get_child(node, 0, NULL, CIMXML_SIMPLEEXPREQ);
	if(temp == NULL) {
		temp = ws_xml_get_child(node, 0, NULL, CIMXML_MULTIEXPREQ);
		if(temp == NULL) return 0;
	}
	return 1;
}

static void cimxml_build_response_msg(WsXmlDocH indoc, WsXmlDocH *outdoc) {
	WsXmlDocH doc = NULL;
	WsXmlNodeH outnode = NULL;
	WsXmlNodeH innode = NULL;
	WsXmlNodeH temp = NULL;
	WsXmlNodeH temp2 = NULL;
	doc = ws_xml_create_doc(NULL, CIMXML_CIM);
	outnode = ws_xml_get_doc_root(doc);
	innode = ws_xml_get_doc_root(indoc);
//	char *value = ws_xml_get_node_attr(WsXmlNodeH node, int index)
	ws_xml_add_node_attr(outnode, NULL, CIMXML_CIMVERSION, "2.0");
	ws_xml_add_node_attr(outnode, NULL, CIMXML_DTDVERSION, "2.0");
	outnode = ws_xml_add_child(outnode, NULL, CIMXML_MESSAGE, NULL);
	innode = ws_xml_get_child(innode, 0, NULL, CIMXML_MESSAGE);
	int n = ws_xml_get_node_attr_count(innode);
	int i = 0;
	while(i < n) {
		WsXmlAttrH attr = ws_xml_get_node_attr(innode, i);
	 	char *name = ws_xml_get_attr_name(attr);
	 	char *value = ws_xml_get_attr_value(attr);
	 	ws_xml_add_node_attr(outnode, NULL, name, value);
	 	i++;
	}
	temp = ws_xml_get_child(innode, 0, NULL, CIMXML_SIMPLEEXPREQ);
	if(temp) {
		outnode = ws_xml_add_child(outnode, NULL, CIMXML_SIMPLEEXPRSP, NULL);
		outnode = ws_xml_add_child(outnode, NULL, CIMXML_EXPMETHODRESPONSE, NULL);
		ws_xml_add_node_attr(outnode, NULL, CIMXML_NAME, "ExportIndication");
		ws_xml_add_child(outnode, NULL, CIMXML_IRETURNVALUE, NULL);
	}
	else {
		temp = ws_xml_get_child(innode, 0, NULL, CIMXML_MULTIEXPREQ);
		outnode = ws_xml_add_child(outnode, NULL, CIMXML_MULTIEXPRSQ, NULL);
		n = ws_xml_get_child_count(temp);
		i = 0;
		while(i < n) {
			innode = ws_xml_get_child(temp, i, NULL, CIMXML_SIMPLEEXPREQ);
			temp2 = ws_xml_add_child(outnode, NULL, CIMXML_EXPMETHODRESPONSE, NULL);
			ws_xml_add_node_attr(temp2, NULL, CIMXML_NAME, "ExportIndication");
			ws_xml_add_child(temp2, NULL, CIMXML_IRETURNVALUE, NULL);
			i++;
		}
	}
	*outdoc = doc;
}

static
char * get_cim_indication_namespace(WsSubscribeInfo *subsInfo, char *classname) {
	hscan_t hs;
	hnode_t *hn;
	char *sub;
	if (strstr(subsInfo->uri, XML_NS_CIM_CLASS) != NULL) {
	   	return u_strdup(subsInfo->uri);
	}
	hash_t *namespaces = subsInfo->vendor_namespaces;
	if (namespaces) {
		hash_scan_begin(&hs, namespaces);
		while ((hn = hash_scan_next(&hs))) {
			debug("namespace=%s", (char *) hnode_get(hn));
			if ((sub =  strstr(classname, (char *) hnode_getkey(hn)))) {
				return u_strdup((char *)hnode_get(hn));
			}
		}
	}
	return NULL;
}

static WsNotificationInfoH
create_notification_entity(WsSubscribeInfo *subsInfo, WsXmlNodeH node)
{
	char *classname = NULL;
	char *class_namespace = NULL;
	WsXmlNodeH indicationnode = NULL;
	WsNotificationInfoH notificationinfo = NULL;
	notificationinfo = u_zalloc(sizeof(*notificationinfo));
	if (notificationinfo == NULL) {
		return NULL;
	}
	WsXmlNodeH instance = ws_xml_get_child(node, 0, NULL, CIMXML_EXPMETHODCALL);
	if (instance == NULL) {
		u_free(notificationinfo);
		return NULL;
	}
	instance = ws_xml_get_child(instance, 0, NULL, CIMXML_EXPPARAMVALUE);
	if (instance == NULL) {
		u_free(notificationinfo);
		return NULL;
	}
	instance = ws_xml_get_child(instance, 0, NULL, CIMXML_INSTANCE);
	if (instance == NULL) {
		u_free(notificationinfo);
		return NULL;
	}
	WsXmlAttrH attr = ws_xml_find_node_attr(instance, NULL, CIMXML_CLASSNAME);
	if (attr) {
		classname = ws_xml_get_attr_value(attr);
		class_namespace = get_cim_indication_namespace(subsInfo, classname);
		notificationinfo->EventAction = u_strdup_printf("%s/%s", class_namespace, classname);
	}
	notificationinfo->EventContent = ws_xml_create_doc(notificationinfo->EventAction, classname);
	indicationnode = ws_xml_get_doc_root(notificationinfo->EventContent);
	int m = ws_xml_get_child_count(instance);
	int n = 0;
	while(n < m) {
		//only parse tag "Property" temporarily
		node = ws_xml_get_child(instance, n, NULL, CIMXML_PROPERTY);
		attr = ws_xml_find_node_attr(node, NULL, CIMXML_NAME);
		char *property = NULL;
		char *value = NULL;
		if(attr) {
			property = ws_xml_get_attr_value(attr);
		}
		value = ws_xml_get_node_text(node);
		ws_xml_add_child(indicationnode, notificationinfo->EventAction, property, value);
		n++;
	}
	if (class_namespace)
		u_free(class_namespace);
	return notificationinfo;
}


static
void create_indication_event(WsXmlDocH indoc, WsSubscribeInfo *subsInfo, EventPoolOpSetH opset) {
	int count, i;
	int retval;
	WsNotificationInfoH notificationinfo = NULL;
	WsXmlNodeH node = ws_xml_get_doc_root(indoc);
	node = ws_xml_get_child(node, 0, NULL, CIMXML_MESSAGE);
	WsXmlNodeH tmp = ws_xml_get_child(node, 0, NULL, CIMXML_MULTIEXPREQ);
	if(tmp) {
		count = ws_xml_get_child_count(tmp);
		i = 0;
		while(i < count) {
			node = ws_xml_get_child(tmp, i,  NULL, CIMXML_SIMPLEEXPREQ);
			notificationinfo = create_notification_entity(subsInfo, node);
			if(notificationinfo == NULL) {
				i++;
				continue;
			}
			if(subsInfo->deliveryMode == WS_EVENT_DELIVERY_MODE_PULL)
				retval = opset->addpull(subsInfo->subsId, notificationinfo);
			else
				retval = opset->add(subsInfo->subsId, notificationinfo);
			if(retval) {
				u_free(notificationinfo->EventAction);
				ws_xml_destroy_doc(notificationinfo->EventContent);
				u_free(notificationinfo);
			}
			i++;
		}

	}
	else {
		tmp = ws_xml_get_child(node, 0, NULL, CIMXML_SIMPLEEXPREQ);
		notificationinfo = create_notification_entity(subsInfo, tmp);
		if(subsInfo->deliveryMode == WS_EVENT_DELIVERY_MODE_PULL)
			retval = opset->addpull(subsInfo->subsId, notificationinfo);
		else
			retval = opset->add(subsInfo->subsId, notificationinfo);
		if(retval) {
			u_free(notificationinfo->EventAction);
			ws_xml_destroy_doc(notificationinfo->EventContent);
			u_free(notificationinfo);
		}
	}

}

CimxmlMessage *cimxml_message_new() {
	CimxmlMessage *cimxml_msg = u_zalloc(sizeof(CimxmlMessage));
	u_buf_create(&cimxml_msg->request);
	u_buf_create(&cimxml_msg->response);
	cimxml_msg->status.code = CIMXML_STATUS_OK;
	return cimxml_msg;
}

void cimxml_message_destroy(CimxmlMessage *msg) {
	u_buf_free(msg->request);
	u_buf_free(msg->response);
	u_free(msg->charset);
	u_free(msg);
}

static
void cimxml_set_fault(CimxmlMessage *message, CIMXMLKnownStatusCode status) {
	struct cimxml_code_map {
		int code;
		char *reason_phrase;
	};
	struct cimxml_code_map maps[] = {
        {CIMXML_STATUS_UNSUPPORTED_PROTOCOL_VERSIOIN, "unsupported-protocol-version"},
        {CIMXML_STATUS_MULTIPLE_REQUESTS_UNSUPPORTED, "multiple-requests-unsupported"},
        {CIMXML_STATUS_UNSUPPORTED_CIM_VERSION, "unsupported-cim-version"},
        {CIMXML_STATUS_UNSUPPORTED_DTD_VERSION, "unsupported-dtd-version"},
        {CIMXML_STATUS_REQUEST_NOT_VALID, "request-not-valid"},
        {CIMXML_STATUS_REQUEST_NOT_WELL_FORMED, "request-not-well-formed"},
        {CIMXML_STATUS_REQUEST_NOT_LOOSELY_VALID, "request-not-loosely-valid"},
        {CIMXML_STATUS_HEADER_MISMATCH, "header-mismatch"},
        {CIMXML_STATUS_UNSUPPORTED_OPERATION, "unsupported-operatioin"},
        {0, NULL}
	};
	int i = 0;
	if(message == NULL) return;
	while(maps[i].code) {
		if(maps[i].code == status) {
        	message->status.code = status;
		message->status.fault_msg = maps[i].reason_phrase;
		break;
        }
        i++;
    }
}

void CIM_Indication_call(cimxml_context *cntx, CimxmlMessage *message, void *opaqueData) {
	char *response = NULL;
	int len;
	WsXmlDocH indicationRequest = NULL;
	WsXmlDocH indicationResponse = NULL;
	SoapH soap = cntx->soap;
	char *uuid = cntx->uuid;
	WsContextH soapCntx = ws_get_soap_context(soap);
	debug("**********in CIM_Indication_call:: %s", u_buf_ptr(message->request));
	indicationRequest = ws_xml_read_memory(u_buf_ptr(message->request), u_buf_len(message->request),
		message->charset, 0);
	if(indicationRequest == NULL) {
		debug("error, request cannot be parsed !");
		message->http_code = WSMAN_STATUS_BAD_REQUEST;
		cimxml_set_fault(message, CIMXML_STATUS_REQUEST_NOT_VALID);
		goto DONE;
	}
	if(!isvalidCIMIndicationExport(indicationRequest)) {
		debug("error, invalid cim indication");
		message->http_code = WSMAN_STATUS_FORBIDDEN;
		cimxml_set_fault(message, CIMXML_STATUS_UNSUPPORTED_OPERATION);
		goto DONE;
	}
	//to do here: put indication in event pool
	WsSubscribeInfo *subsInfo = NULL;
	list_t *subslist = soapCntx->subscriptionMemList;
	lnode_t *node = list_first(subslist);
	while(node) {
		subsInfo = (WsSubscribeInfo *)node->list_data;
		if(!strcmp(subsInfo->subsId, uuid)) break;
		node = list_next(subslist, node);
	}
	if(node == NULL) {
		message->http_code = WSMAN_STATUS_NOT_FOUND;
		cimxml_set_fault(message, CIMXML_STATUS_REQUEST_NOT_VALID);
		debug("error. uuid:%s not registered!", uuid);
		goto DONE;
	}
	EventPoolOpSetH opset = soap->eventpoolOpSet;
	create_indication_event(indicationRequest, subsInfo, opset);
	cimxml_build_response_msg(indicationRequest, &indicationResponse);
	ws_xml_dump_memory_enc(indicationResponse, &response, &len, "utf-8");
	u_buf_construct(message->response, response, len, len);
DONE:
	u_free(cntx);
	ws_xml_destroy_doc(indicationRequest);
	ws_xml_destroy_doc(indicationResponse);
}