/*
    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.

   Original Idea Copyright (c) 2006,2007 HPC2N, Umeå University, Sweden
   Modifications Copyright (c) 2012-2013 by Deon George
*/

/* Enable Large File Support stuff */
#define _FILE_OFFSET_BITS 64
#define _LARGEFILE_SOURCE 1
#define _LARGE_FILES 1

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <limits.h>

#include "dsmrc.h"
#include "dsmapitd.h"
#include "dsmapifp.h"
#include "tsmpipe.h"

int verbose=0;

int copy_env(const char *from, const char *to) {
	char *e;
	char n[PATH_MAX+1];

	e = getenv(from);
	if (!e) {
		fprintf(stderr,"tsmpipe: Environment variable %s not set\n",from);
		return 0;
	}

	n[PATH_MAX] = '\0';
	snprintf(n, PATH_MAX, "%s=%s", to, e);

	if (putenv(strdup(n))) {
		perror("tsmpipe: Setting up environment");
		return 0;
	}

	return 1;
}

void usage(void) {
	fprintf(stderr,
		"tsmpipe %s, usage:\n"
		"\n"
		"tsmpipe [-i]|[[-A|-B] [-c|-x|-d|-t] -s fsname -f filepath [-l len] ...]\n"
		"   -i Show session information:\n"
		"   -A and -B are mutually exclusive:\n"
		"       -A  Use Archive objects\n"
		"       -B  Use Backup objects\n"
		"   -c, -x, -d and -t are mutually exclusive:\n"
		"       -c  Create:  Read from stdin and store in TSM\n"
		"       -x  eXtract: Recall from TSM and write to stdout\n"
		"       -d  Delete:  Delete object from TSM\n"
		"       -t  lisT:    Print filelist to stdout\n"
		"   -s and -f are required arguments for (-A/ -B operations):\n"
		"       -s fsname   Name of filesystem in TSM\n"
		"       -f filepath Path to file within filesystem in TSM\n"
		"   -l length   Length of object to store. If guesstimating, too large\n"
		"               is better than too small\n"
		"   -D desc     Description of archive object\n"
		"   -P pitdate  PITDate (mmddYYYY[:HHMMSS]) (BACKUP Objects)\n"
		"   -n insdate  Insert Date lower bound (mmddYYYY[:HHMMSS]) (ARCHIVE Objects)\n"
		"   -N insdate  Insert Date upper bound (mmddYYYY[:HHMMSS]) (ARCHIVE Objects)\n"
		"   -e expdate  Expire Date lower bound (mmddYYYY[:HHMMSS]) (ARCHIVE Objects)\n"
		"   -E expdate  Expire Date upper bound (mmddYYYY[:HHMMSS]) (ARCHIVE Objects)\n"
		"   -O options  Extra options to pass to dsmInitEx\n"
#ifdef USE_DIGEST
		"   -m digest   Calculate digest for data being stored in TSM, eg: md5, sha1...\n"
#endif
		"   -v          Verbose. More -v's gives more verbosity\n"
	,_TSMPIPE_VERSION);

	exit(1);
}

void usage_action(void) {
	fprintf(stderr, "tsmpipe: ERROR: Must give one of -i, -c, -x, -d, -t\n");
	exit(1);
}


int main(int argc, char *argv[]) {
	int c;
	extern int optopt;
	extern char *optarg;
	int action=0;
	char *space=NULL, *filename=NULL, *lenstr=NULL, *desc=NULL, *pitdate=NULL, *options=NULL, *expdate_low=NULL, *expdate_high=NULL, *insdate_low=NULL, *insdate_high=NULL;
	off_t length;
	dsUint32_t dsmHandle;
	dsmQueryType qType=0xff; // We set this to an unlikely value, it should be set correctly via our getopt
	qryArchiveData qaData;
	qryBackupData qbData;
	dsmObjName objName;
	int rc=0;
#ifdef USE_DIGEST
	char *digest=NULL;
#endif

	while ((c = getopt(argc, argv, "hiABcxdtve:E:f:l:m:n:N:s:D:O:P:")) != -1) {
		switch(c) {
			case 'h': usage(); break;
			case 'A': qType = qtArchive; break;
			case 'B': qType = qtBackup; break;

			case 'i': if (action != 0) usage_action(); action = ACTION_INFO; break;
			case 'c': if (action != 0) usage_action(); action = ACTION_CREATE; break;
			case 'x': if (action != 0) usage_action(); action = ACTION_EXTRACT; break;
			case 'd': if (action != 0) usage_action(); action = ACTION_DELETE; break;
			case 't': if (action != 0) usage_action(); action = ACTION_LIST; break;

			case 'v': verbose++; break;
			case 's': space = optarg; break;
			case 'f': filename = optarg; break;
			case 'l': lenstr = optarg; break;
			case 'D': desc = optarg; break;

#ifdef USE_DIGEST
			case 'm': digest = optarg; break;
#endif
			case 'O': options = optarg; break;

			case 'P': pitdate = optarg; break;
			case 'e': expdate_low = optarg; break;
			case 'E': expdate_high = optarg; break;
			case 'n': insdate_low = optarg; break;
			case 'N': insdate_high = optarg; break;

			case ':':
				fprintf(stderr, "tsmpipe: Option -%c requires an operand\n", optopt);
				exit(1);
			case '?':
				fprintf(stderr, "tsmpipe: Unrecognized option: -%c\n", optopt);
				exit(1);
		}
	}

	// Arguement Validation
	if (action == 0) {
		fprintf(stderr, "tsmpipe: ERROR: Must give one of -i, -c, -x, -d, -t\n");
		exit(1);
	}

	if (pitdate && qType != qtBackup) {
		fprintf(stderr, "tsmpipe: ERROR: -P can only be used with -B\n");
		exit(1);
	}

	if ((insdate_low|| insdate_high || expdate_low || expdate_high) && qType != qtArchive) {
		fprintf(stderr, "tsmpipe: ERROR: -e, -E, -n, -N can only be used with -A\n");
		exit(1);
	}

	if (action != ACTION_INFO) {
		if (! space) {
			fprintf(stderr, "tsmpipe: ERROR: Must give -s filespacename\n");
			exit(1);
		}

		if (! filename) {
			fprintf(stderr, "tsmpipe: ERROR: Must give -f filename\n");
			exit(1);
		}

		if (action == ACTION_CREATE && ! lenstr) {
			fprintf(stderr, "tsmpipe: ERROR: Must give -l length with -c\n");
			exit(1);
		}

		if (action != ACTION_CREATE && lenstr) {
			fprintf(stderr, "tsmpipe: ERROR: -l length useless without -c\n");
			exit(1);
		}

		if (desc && qType != qtArchive) {
			fprintf(stderr, "tsmpipe: ERROR: -D desc useless without -A\n");
			exit(1);
		}
	}

	/* Let the TSM api get the signals */
	signal(SIGPIPE, SIG_IGN);
	signal(SIGINT, SIG_IGN);
	signal(SIGUSR1, SIG_IGN);

	if (getenv("DSM_DIR") && ((! copy_env("DSM_DIR", "DSMI_DIR")) || (! copy_env("DSM_CONFIG", "DSMI_CONFIG"))))
		exit(1);

	// OK, we are ready to talk to TSM
	debugLog(1,stderr,"tsmpipe: Create TSM session",0);

	dsmHandle = tsm_initsess(options);
	if (! dsmHandle)
		debugLog(0,stderr,"tsmpipe: Unable to create TSM session?",2);

	debugLog(2,stderr,"tsmpipe: Session Initiated",0);

	switch (action) {
		// Show our session information
		case ACTION_INFO:
			debugLog(2,stderr,"tsmpipe: INFO Operation",0);

			rc = tsm_sessioninfo(dsmHandle);
			break;

		// If we are backing up or archiving
		case ACTION_CREATE:
			debugLog(2,stderr,"tsmpipe: CREATE Operation",0);

			length = atof(lenstr);
			if (length <= 0)
				debugLog(0,stderr,"tsmpipe: ERROR: Provide positive length, overestimate if guessing",1);

#ifdef USE_DIGEST
			rc = tsm_sendfile(dsmHandle,space,filename,length,desc,((qType == qtArchive) ? stArchiveMountWait : stBackupMountWait),digest);
#else
			rc = tsm_sendfile(dsmHandle,space,filename,length,desc,((qType == qtArchive) ? stArchiveMountWait : stBackupMountWait));
#endif
			break;

		case ACTION_DELETE:
		case ACTION_LIST:
		case ACTION_EXTRACT:
			memset(&qaData,0x00,sizeof(qryArchiveData));
			memset(&qbData,0x00,sizeof(qryBackupData));
			objName = dsmNameToObjname(space,filename);

			// Setup our Query Object
			switch (qType) {
				case qtBackup:
					qbData.stVersion = qryBackupDataVersion;
					qbData.objName = &objName;
					qbData.owner = "";

					switch (action) {
						case ACTION_DELETE:
							qbData.objState = DSM_ACTIVE;
							break;

						case ACTION_EXTRACT:
							qbData.objState = pitdate ? DSM_ANY_MATCH : DSM_ACTIVE;
							break;

						case ACTION_LIST:
							qbData.objState = DSM_ANY_MATCH;
							break;
					}

					if (action == ACTION_DELETE || ! pitdate) {
						qbData.pitDate.year = DATE_MINUS_INFINITE;
					} else {
						qbData.pitDate = dsmStrToDate(pitdate);
					}

					break;

				case qtArchive:
					qaData.stVersion = qryArchiveDataVersion;
					qaData.objName = &objName;
					qaData.owner = "";
					qaData.descr = desc ? desc : "*";

					qaData.insDateLowerBound.year = DATE_MINUS_INFINITE;
					qaData.insDateUpperBound.year = DATE_PLUS_INFINITE;
					qaData.expDateLowerBound.year = DATE_MINUS_INFINITE;
					qaData.expDateUpperBound.year = DATE_PLUS_INFINITE;

					if (insdate_low)
						qaData.insDateLowerBound = dsmStrToDate(insdate_low);

					if (insdate_high)
						qaData.insDateUpperBound = dsmStrToDate(insdate_high);

					if (expdate_low)
						qaData.expDateLowerBound = dsmStrToDate(expdate_low);

					if (expdate_high)
						qaData.expDateUpperBound = dsmStrToDate(expdate_high);
					break;

				default:
					fprintf(stderr,"tsmpipe: UNKNOWN Type %d",qType);
					exit(2);
			}

			switch (action) {
				case ACTION_DELETE:
					debugLog(2,stderr,"tsmpipe: DELETE Operation",0);
					rc = tsm_deletefile(dsmHandle,qType,qaData,qbData);
					break;

				case ACTION_EXTRACT:
					debugLog(2,stderr,"tsmpipe: EXTRACT Operation",0);
					rc = tsm_restorefile(dsmHandle,qType,qaData,qbData);
					break;

				case ACTION_LIST:
					debugLog(2,stderr,"tsmpipe: LIST Operation",0);
					rc = tsm_listfile(dsmHandle,qType,qaData,qbData);
					break;

				default:
					fprintf(stderr,"tsmpipe: Action not yet programmed for%d",action);
					exit(2);
			}
			break;

		default:
			fprintf(stderr,"tsmpipe: UNKNOWN Operation %d",action);
			exit(2);
	}

	debugLog(1,stderr,"tsmpipe: Terminate TSM session",0);

	dsmTerminate(dsmHandle);

	if (! rc)
		debugLog(0,stderr,"tsmpipe: Operation Failed",3);
	else
		debugLog(1,stderr,"tsmpipe: Operation Success",0);

	return 0;
}