/*
 * Copyright (c) 2002-2003 MontaVista Software, Inc.
 * Copyright (c) 2006 Ericsson AB.
 * Copyright (c) 2006 Sun Microsystems, Inc.
 *
 * All rights reserved.
 *
 * Author:  Steven Dake (sdake@mvista.com)
 *	    Hans Feldt
 *
 * This software licensed under BSD license, the text of which follows:
 * 
 * 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 of the MontaVista Software, Inc. nor the names of its
 *   contributors 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.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sched.h>
#include <sys/stat.h>
#include <fcntl.h>

#include "saAis.h"
#include "saAmf.h"

SaAmfHandleT handle;

SaAmfHealthcheckKeyT key0 = {
	.key = "key1",
	.keyLen = 4
};
SaNameT compNameGlobal;
int good_health = 0;
int good_health_limit = 0;

void printSaNameT (SaNameT *name)
{
	int i;

	for (i = 0; i < name->length; i++) {
		printf ("%c", name->value[i]);
	}
}

void setSanameT (SaNameT *name, char *str) {
	name->length = strlen (str);
	memcpy (name->value, str, name->length);
}

static unsigned int healthcheck_no = 0;

int stop = 0;

void HealthcheckCallback (SaInvocationT invocation,
	const SaNameT *compName,
	SaAmfHealthcheckKeyT *healthcheckKey)
{
	SaAisErrorT res;

	if( !good_health && healthcheck_no++);

	if (healthcheck_no == good_health_limit ) {
        res = saAmfResponse (handle, invocation, SA_AIS_OK);
        res = saAmfHealthcheckStop (handle,
                                       &compNameGlobal,
                                       &key0);
        printf ("healthcheck stop result %d (should be %d)\n", res, SA_AIS_OK);

        printf ("COMPONENT REPORTING ERROR %s\n", compNameGlobal.value);
		saAmfComponentErrorReport (handle, compName, 0, SA_AMF_COMPONENT_RESTART, 0);
        printf ("COMPONENT DONE REPORTING ERROR\n");
	} else {
		res = saAmfResponse (handle, invocation, SA_AIS_OK);
	}
}

void ComponentTerminateCallback (
	SaInvocationT invocation,
	const SaNameT *compName)
{
	printf ("ComponentTerminateCallback\n");
	saAmfResponse (handle, invocation, SA_AIS_OK);
	exit (0);
}

#if 0
    #include <sys/time.h>
    #define TRU "%d"
    #define TRS "%s" 
    #define TR(format,x) do {                               \
	struct timeval t;\
	gettimeofday(&t,NULL);                                   \
	printf("%s:%d: %s : %d : %u: %u :%s : " format "\n",\
		__FILE__,__LINE__,__FUNCTION__,             \
		(int)getpid(),(int)t.tv_sec, (int)t.tv_usec,#x,x);          \
    }while(0)
#else
    #define TRU "%d"
    #define TRS "%s" 
    #define TR(format,x)
#endif

void CSISetCallback (
	SaInvocationT invocation,
	const SaNameT *compName,
	SaAmfHAStateT haState,
	SaAmfCSIDescriptorT *csiDescriptor)
{
	SaAmfHAStateT state;
	int res;
	switch (haState) {
	case SA_AMF_HA_ACTIVE:
		printf ("%d: Component '%s' requested to enter hastate SA_AMF_ACTIVE"
				" for \n\tCSI '%s'\n",
			(int)getpid(), compName->value, csiDescriptor->csiName.value);
		res = saAmfResponse (handle, invocation, SA_AIS_OK);
		if (res != SA_AIS_OK) {
			fprintf (stderr, "%d: saAmfResponse failed: %d\n", (int)getpid(), res);
			exit (-1);
		}

		res = saAmfHAStateGet (handle, compName, &csiDescriptor->csiName, &state);
		if (res != SA_AIS_OK || haState != state) {
			fprintf (stderr, "saAmfHAStateGet failed: %d\n", res);
			exit (-1);
		}

		int i;
		TR(TRU, csiDescriptor->csiAttr.number);
		for(i=0; i<csiDescriptor->csiAttr.number; i++) {

		    if( strcmp((char*)csiDescriptor->csiAttr.attr[i].attrName, "good_health_limit") == 0){
				good_health = strcmp((char*)csiDescriptor->csiAttr.attr[i].attrValue, "0") ? 0 : 1;
				good_health_limit = atoi((char*)csiDescriptor->csiAttr.attr[i].attrValue);
			
		    }
#if 0
		    TR(TRS,csiDescriptor->csiAttr.attr[i].attrName);
		    TR(TRS, csiDescriptor->csiAttr.attr[i].attrValue);
#endif
		} 

		TR(TRU, csiDescriptor->csiFlags);


		printSaNameT((SaNameT*) &csiDescriptor->csiStateDescriptor.activeDescriptor.activeCompName);
		TR(TRU, csiDescriptor->csiStateDescriptor.activeDescriptor.transitionDescriptor);

		break;  
         
	case SA_AMF_HA_STANDBY:
		printf ("%d: Component '%s' requested to enter hastate SA_AMF_STANDBY "
				"for \n\tCSI '%s'\n",
			(int)getpid(), compName->value, csiDescriptor->csiName.value);
		res = saAmfResponse (handle, invocation, SA_AIS_OK);
		
		TR(TRU,csiDescriptor->csiAttr.number);
		for(i=0; i<csiDescriptor->csiAttr.number; i++) {
		    if(!strcmp((char*)csiDescriptor->csiAttr.attr[i].attrName, "good_health") && 
		       !strcmp((char*)csiDescriptor->csiAttr.attr[i].attrValue, "true")){
			good_health = 1;
		    }
		    TR(TRS,csiDescriptor->csiAttr.attr[i].attrName);
		    TR(TRS,csiDescriptor->csiAttr.attr[i].attrValue);
		} 
		TR(TRU,csiDescriptor->csiFlags);

		printSaNameT((SaNameT*) &csiDescriptor->csiStateDescriptor.standbyDescriptor.activeCompName);
		TR(TRU,csiDescriptor->csiStateDescriptor.standbyDescriptor.standbyRank);

		break;
	case SA_AMF_HA_QUIESCED:
		printf ("%d: Component '%s' requested to enter hastate SA_AMF_HA_QUIESCED "
				"for \n\tCSI '%s'\n",
			(int)getpid(), compName->value, csiDescriptor->csiName.value);
		res = saAmfResponse (handle, invocation, SA_AIS_OK);
		break;
	case SA_AMF_HA_QUIESCING:
		break;
	}
}

void CSIRemoveCallback (
	SaInvocationT invocation,
	const SaNameT *compName,
	const SaNameT *csiName,
	SaAmfCSIFlagsT csiFlags)
{
	int res;

	printf ("CSIRemoveCallback for component '");
	printSaNameT ((SaNameT *)compName);
	printf ("' in CSI '");
	printSaNameT ((SaNameT *)csiName);
	printf ("'\n");
	res = saAmfResponse (handle, invocation, SA_AIS_OK);
}

#ifdef COMPILE_OUT
void ProtectionGroupTrackCallback (
	const SaNameT *csiName,
	SaAmfProtectionGroupNotificationT *notificationBuffer,
	SaUint32T numberOfItems,
	SaUint32T numberOfMembers,
	SaAisErrorT error)
{
	int i;

	printf ("ProtectionGroupTrackCallback items %d members %d\n", (int)numberOfItems, (int)numberOfMembers);
	printf ("buffer is %p\n", notificationBuffer);
	for (i = 0; i < numberOfItems; i++) {
		printf ("component name");
		printSaNameT (&notificationBuffer[i].member.compName);
		printf ("\n");
		printf ("\treadiness state is %d\n",  notificationBuffer[i].member.readinessState);
		printf ("\thastate %d\n",  notificationBuffer[i].member.haState);
		printf ("\tchange is %d\n",  notificationBuffer[i].change);

	}
}

#endif

SaAmfCallbacksT amfCallbacks = {
	.saAmfHealthcheckCallback = HealthcheckCallback,
	.saAmfComponentTerminateCallback = ComponentTerminateCallback,
	.saAmfCSISetCallback = CSISetCallback,
	.saAmfCSIRemoveCallback = CSIRemoveCallback,
};

SaAmfCallbacksT amfCallbacks;

SaVersionT version = { 'B', 1, 1 };

#if ! defined(TS_CLASS) && (defined(OPENAIS_BSD) || defined(OPENAIS_LINUX) || defined(OPENAIS_SOLARIS))
static struct sched_param sched_param = {
    sched_priority: 99
};
#endif

void sigintr_handler (int signum) {
	exit (0);
}
 
void write_pid (void) {
	char pid[256];
	char filename[256];
	int fd;
	int res;
	
	sprintf (filename,  "/var/run/openais_cleanup_%s", compNameGlobal.value);
	fd = open (filename, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU);
	if (fd == -1) {
		printf("%d: Failed using /var/run for pid file, using /tmp\n", (int)getpid());
		sprintf (filename,  "/tmp/openais_cleanup_%s", compNameGlobal.value);
		fd = open (filename, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU);
	}
	sprintf (pid, "%d", (int)getpid());
	res = write (fd, pid, strlen (pid));
	close (fd);
}

int main (int argc, char **argv) {
	int result;
	SaSelectionObjectT select_fd;
	fd_set read_fds;
	extern char *optarg;
	extern int optind;
	char *name = getenv ("SA_AMF_COMPONENT_NAME");
	char *env;

	printf("%d: Hello world from %s\n", (int)getpid(), name);

	/* test that it exist */
	if (name == NULL) {
		fprintf(stderr, "SA_AMF_COMPONENT_NAME missing\n");
		exit (1);
	}

	env = getenv ("var1");
	if (env == NULL) {
		printf("var1 missing\n");
		exit (2);
	}
	if (strcmp (env, "val1") != 0) {
		fprintf(stderr, "var1 value wrong\n");
		exit (3);
	}
	env = getenv ("var2");
	if (env == NULL) {
		fprintf(stderr, "var2 wrong\n");
		exit (4);
	}
	if (strcmp (env, "val2") != 0) {
		fprintf(stderr, "var2 value wrong\n");
		exit (5);
	}

	/* test for correct value */
#if 0
	if (strstr (name, "safComp=A,safSu=SERVICE_X_") == NULL) {
		fprintf(stderr, "SA_AMF_COMPONENT_NAME value wrong\n");
		exit (-2);
	}
#endif

	signal (SIGINT, sigintr_handler);
#if ! defined(TS_CLASS) && (defined(OPENAIS_BSD) || defined(OPENAIS_LINUX) || defined(OPENAIS_SOLARIS))
	result = sched_setscheduler (0, SCHED_RR, &sched_param);
	if (result == -1) {
		printf ("%d: couldn't set sched priority\n", (int)getpid());
 	}
#endif

	result = saAmfInitialize (&handle, &amfCallbacks, &version);
	if (result != SA_AIS_OK) {
		printf ("initialize result is %d\n", result);
		exit (6);
	}

	FD_ZERO (&read_fds);
	saAmfSelectionObjectGet (handle, &select_fd);
	FD_SET (select_fd, &read_fds);
	saAmfComponentNameGet (handle, &compNameGlobal);
	write_pid ();
	
	result = saAmfHealthcheckStart (handle,
		&compNameGlobal,
		&key0,
		SA_AMF_HEALTHCHECK_AMF_INVOKED,
		SA_AMF_COMPONENT_FAILOVER);
	if (result != SA_AIS_OK) {
		printf ("Error: healthcheck start result %d\n", result);
	}

    {
        SaNameT badname;
        strcpy ((char*)badname.value, "badname");
        badname.length = 7;
		do {
			result = saAmfComponentRegister (handle, &badname, NULL);
			if (result == SA_AIS_ERR_TRY_AGAIN) {
				printf("%d: TRY_AGAIN received\n", getpid());
				sleep (1);
			}
		} while (result == SA_AIS_ERR_TRY_AGAIN);
		if (result != SA_AIS_ERR_INVALID_PARAM) {
			printf ("Error: register result is %d\n", result);
		}
    }

	do {
		result = saAmfComponentRegister (handle, &compNameGlobal, NULL);
		if (result == SA_AIS_ERR_TRY_AGAIN) {
			printf("%d: TRY_AGAIN received\n", getpid());
			sleep (1);
		}
	} while (result == SA_AIS_ERR_TRY_AGAIN);
	if (result != SA_AIS_OK) {
		printf ("Error: register result is %d\n", result);
	}

    /*
     * Test already started healthcheck
     */
    result = saAmfHealthcheckStart (handle,
        &compNameGlobal,
        &key0,
        SA_AMF_HEALTHCHECK_AMF_INVOKED,
        SA_AMF_COMPONENT_FAILOVER);
	if (result != SA_AIS_ERR_EXIST) {
		printf ("Error: healthcheck start result %d\n", result);
	}

	do {
		select (select_fd + 1, &read_fds, 0, 0, 0);
		result = saAmfDispatch (handle, SA_DISPATCH_ALL);

		if (result != SA_AIS_OK) {
			exit (7);
		}
	} while (result && stop == 0);


	printf ("healthchecks stopped for 5 seconds\n");
	sleep (5);
	result = saAmfHealthcheckStart (handle,
		&compNameGlobal,
		&key0,
		SA_AMF_HEALTHCHECK_AMF_INVOKED,
		SA_AMF_COMPONENT_FAILOVER);

	do {
		select (select_fd + 1, &read_fds, 0, 0, 0);
		result = saAmfDispatch (handle, SA_DISPATCH_ALL);
	} while (result);

	saAmfFinalize (handle);

	exit (0);
}