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/*****************************************************************************

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 *

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 * $Id$

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 *

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 ****************************************************************************/

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#include <getopt.h>

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#include <iostream>

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#include <string>

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using namespace std;

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#include "Master.h"

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/*****************************************************************************/

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#define DEFAULT_MASTER 0

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#define DEFAULT_COMMAND "slaves"

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#define DEFAULT_SLAVEPOSITION -1

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static unsigned int masterIndex = DEFAULT_MASTER;

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static int slavePosition = DEFAULT_SLAVEPOSITION;

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static string command = DEFAULT_COMMAND;

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/*****************************************************************************/

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void printUsage()

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{

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    cerr

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        << "Usage: ethercat <COMMAND> [OPTIONS]" << endl

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		<< "Commands:" << endl

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        << "  list (ls, slaves)  List all slaves (former 'lsec')." << endl

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        << "  pdos               List Pdo mapping of given slaves." << endl

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		<< "Global options:" << endl

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        << "  --master  -m <master>  Index of the master to use. Default: "

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		<< DEFAULT_MASTER	<< endl

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        << "  --slave   -s <slave>   Positive numerical ring position,"

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        << endl

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        << "                         or 'all' for all slaves. Default: 'all'."

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        << endl

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        << "  --help    -h           Show this help." << endl;

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}

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/*****************************************************************************/

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void getOptions(int argc, char **argv)

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{

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    int c, argCount, optionIndex, number;

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	char *remainder;

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    static struct option longOptions[] = {

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        //name,    has_arg,           flag, val

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        {"master", required_argument, NULL, 'm'},

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        {"slave",  required_argument, NULL, 's'},

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        {"help",   no_argument,       NULL, 'h'},

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        {}

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    };

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    do {

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        c = getopt_long(argc, argv, "m:s:h", longOptions, &optionIndex);

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        switch (c) {

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            case 'm':

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                number = strtoul(optarg, &remainder, 0);

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                if (remainder == optarg || *remainder || number < 0) {

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                    cerr << "Invalid master number " << optarg << "!" << endl;

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                    printUsage();

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                    exit(1);

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                }

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				masterIndex = number;

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                break;

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            case 's':

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                if (!strcmp(optarg, "all")) {

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                    slavePosition = -1;

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                } else {

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                    number = strtoul(optarg, &remainder, 0);

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                    if (remainder == optarg || *remainder

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                            || number < 0 || number > 0xFFFF) {

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                        cerr << "Invalid slave position "

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                            << optarg << "!" << endl;

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                        printUsage();

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                        exit(1);

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                    }

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                    slavePosition = number;

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                }

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                break;

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            case 'h':

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            case '?':

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                printUsage();

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                exit(0);

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            default:

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                break;

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        }

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    }

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    while (c != -1);

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	argCount = argc - optind;

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	if (!argCount) {

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        cerr << "Please specify a command!" << endl;

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		printUsage();

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        exit(1);

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	}

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    command = argv[optind];

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}

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/****************************************************************************/

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int main(int argc, char **argv)

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{

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    Master master;

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	getOptions(argc, argv);

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    try {

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        master.open(masterIndex);

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        if (command == "list" || command == "ls" || command == "slaves") {

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            master.listSlaves();

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        } else if (command == "pdos") {

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            master.listPdos(slavePosition);

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        } else {

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            cerr << "Unknown command " << command << "!" << endl;

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            printUsage();

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            exit(1);

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        }

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    } catch (MasterException &e) {

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        cerr << e.what() << endl;

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        exit(1);

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    }

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	return 0;

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}

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/****************************************************************************/