#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>

#include "capture.h"
#include "replay.h"
#include "can2dump.h"
#include "pcap2can.h"
#include "pcapreplay.h"
#include "dash2can.h"

typedef struct {
    const char *name;
    char *(*arglist)(void);
    int (*main)(int argc, char **argv);
} hexagram_app;

hexagram_app apps[] = {
    { "capture",    hexagram_arglist_capture,    hexagram_main_capture    },
    { "replay",     hexagram_arglist_replay,     hexagram_main_replay     },
    { "can2dump",   hexagram_arglist_can2dump,   hexagram_main_can2dump   },
    { "pcap2can",   hexagram_arglist_pcap2can,   hexagram_main_pcap2can   },
    { "pcapreplay", hexagram_arglist_pcapreplay, hexagram_main_pcapreplay },
    { "dash2can",   hexagram_arglist_dash2can,   hexagram_main_dash2can   },
    { NULL, NULL, NULL }
};

static int usage(int argc, char **argv, const char *message, ...) {
    hexagram_app *app;

    if (message) {
        va_list args;

        va_start(args, message);
        vfprintf(stderr, message, args);
        va_end(args);
    }

    fprintf(stderr, "usage: %s [command args ...]\n", argv[0]);

    for (app = apps; app->name != NULL; app++) {
        fprintf(stderr, "       %s %s %s\n", argv[0], app->name, app->arglist());
    }

    exit(1);
}

int main(int argc, char **argv) {
    hexagram_app *app;

    if (argc < 2) {
        return usage(argc, argv, "No command provided\n");
    }

    for (app = apps; app->name != NULL; app++) {
        if (strcmp(argv[1], app->name) == 0) {
            return app->main(--argc, ++argv);
        }
    }

    return usage(argc, argv, NULL);
}