/*      $NetBSD: main.c,v 1.18 2020/06/07 05:49:05 thorpej Exp $        */

/*-
 * Copyright (c) 2008 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: main.c,v 1.18 2020/06/07 05:49:05 thorpej Exp $");
#endif /* !lint */

#include <sys/module.h>
#include <sys/queue.h>

#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <err.h>

#include <prop/proplib.h>

#include "prog_ops.h"

static void     parse_bool_param(prop_dictionary_t, const char *,
                                 const char *);
static void     parse_int_param(prop_dictionary_t, const char *,
                                const char *);
static void     parse_param(prop_dictionary_t, const char *,
                            void (*)(prop_dictionary_t, const char *,
                            const char *));
static void     parse_string_param(prop_dictionary_t, const char *,
                                   const char *);
static void     usage(void) __dead;
static void     merge_dicts(prop_dictionary_t, const prop_dictionary_t);

int
main(int argc, char **argv)
{
        SIMPLEQ_HEAD(del_head, del_item) del_head;
        modctl_load_t cmdargs;
        prop_dictionary_t ext_props, props;
        bool del_props, merge_props, output_props;
        const char *ext_file;
        char *propsstr;
        int ch;
        int flags;

        struct del_item {
                SIMPLEQ_ENTRY(del_item) del_items;
                const char *del_key;
        } *delp;

        SIMPLEQ_INIT(&del_head);
        ext_file = NULL;
        ext_props = NULL;
        props = prop_dictionary_create();
        del_props = merge_props = output_props = false;
        flags = 0;

        while ((ch = getopt(argc, argv, "Pb:d:fi:m:ps:")) != -1) {
                switch (ch) {
                case 'P':
                        flags |= MODCTL_NO_PROP;
                        break;
                case 'b':
                        parse_param(props, optarg, parse_bool_param);
                        break;

                case 'd':
                        del_props = true;
                        delp = malloc(sizeof(struct del_item));
                        if (delp == NULL)
                                errx(EXIT_FAILURE, "Out of memory");
                        delp->del_key = optarg;
                        SIMPLEQ_INSERT_TAIL(&del_head, delp, del_items);
                        break;

                case 'f':
                        flags |= MODCTL_LOAD_FORCE;
                        break;

                case 'i':
                        parse_param(props, optarg, parse_int_param);
                        break;

                case 'm':
                        merge_props = true;
                        ext_file = optarg;
                        break;

                case 'p':
                        output_props = true;
                        break;

                case 's':
                        parse_param(props, optarg, parse_string_param);
                        break;

                default:
                        usage();
                        /* NOTREACHED */
                }
        }

        argc -= optind;
        argv += optind;

        propsstr = prop_dictionary_externalize(props);
        if (propsstr == NULL)
                errx(EXIT_FAILURE, "Failed to process properties");

        if (output_props) {
                if (merge_props) {
                        ext_props =
                            prop_dictionary_internalize_from_file(ext_file);
                        if (ext_props == NULL) {
                                errx(EXIT_FAILURE, "Failed to read existing "
                                    "property list");
                        }

                        free(propsstr);
                        merge_dicts(ext_props, props);

                        if (del_props)
                                SIMPLEQ_FOREACH(delp, &del_head, del_items)
                                        prop_dictionary_remove(ext_props,
                                            delp->del_key);

                        propsstr = prop_dictionary_externalize(ext_props);
                        if (propsstr == NULL)
                                errx(EXIT_FAILURE, "Failed to process "
                                    "properties");
                }
                                
                fputs(propsstr, stdout);
        } else {
                if (argc != 1)
                        usage();
                if (prog_init && prog_init() == -1)
                        err(1, "prog init failed");
                cmdargs.ml_filename = argv[0];
                cmdargs.ml_flags = flags;
                cmdargs.ml_props = propsstr;
                cmdargs.ml_propslen = strlen(propsstr);

                if (prog_modctl(MODCTL_LOAD, &cmdargs)) {
                        err(EXIT_FAILURE, "%s", cmdargs.ml_filename);
                }
        }

        free(propsstr);
        prop_object_release(props);

        exit(EXIT_SUCCESS);
}

static void
parse_bool_param(prop_dictionary_t props, const char *name,
                 const char *value)
{
        bool boolvalue;

        assert(name != NULL);
        assert(value != NULL);

        if (strcasecmp(value, "1") == 0 ||
            strcasecmp(value, "true") == 0 ||
            strcasecmp(value, "yes") == 0)
                boolvalue = true;
        else if (strcasecmp(value, "0") == 0 ||
            strcasecmp(value, "false") == 0 ||
            strcasecmp(value, "no") == 0)
                boolvalue = false;
        else
                errx(EXIT_FAILURE, "Invalid boolean value `%s'", value);

        if (!prop_dictionary_set_bool(props, name, boolvalue))
                err(EXIT_FAILURE, "prop_dictionary_set_bool");
}

static void
parse_int_param(prop_dictionary_t props, const char *name,
                const char *value)
{
        int64_t intvalue;

        assert(name != NULL);
        assert(value != NULL);

        if (dehumanize_number(value, &intvalue) != 0)
                err(EXIT_FAILURE, "Invalid integer value `%s'", value);

        if (!prop_dictionary_set_int64(props, name, intvalue))
                err(EXIT_FAILURE, "prop_dictionary_set_int64");
}

static void
parse_param(prop_dictionary_t props, const char *origstr,
            void (*fmt_handler)(prop_dictionary_t, const char *, const char *))
{
        char *name, *value;

        name = strdup(origstr);

        value = strchr(name, '=');
        if (value == NULL) {
                free(name);
                errx(EXIT_FAILURE, "Invalid parameter `%s'", origstr);
        }
        *value++ = '\0';

        fmt_handler(props, name, value);

        free(name);
}

static void
parse_string_param(prop_dictionary_t props, const char *name,
                   const char *value)
{

        assert(name != NULL);
        assert(value != NULL);

        if (!prop_dictionary_set_string(props, name, value))
                err(EXIT_FAILURE, "prop_dictionary_set_string");
}

static void
usage(void)
{

        (void)fprintf(stderr,
            "Usage: %s [-fP] [-b var=boolean] [-i var=integer] "
            "[-s var=string] module\n"
            "       %s -p [-b var=boolean] [-d var] [-i var=integer] "
            "[-m plist]\n               [-s var=string]\n",
            getprogname(), getprogname());
        exit(EXIT_FAILURE);
}

static void
merge_dicts(prop_dictionary_t existing_dict, const prop_dictionary_t new_dict)
{
        prop_dictionary_keysym_t props_keysym;
        prop_object_iterator_t props_iter;
        prop_object_t props_obj;
        const char *props_key;

        props_iter = prop_dictionary_iterator(new_dict);
        if (props_iter == NULL) {
                errx(EXIT_FAILURE, "Failed to iterate new property list");
        }

        while ((props_obj = prop_object_iterator_next(props_iter)) != NULL) {
                props_keysym = (prop_dictionary_keysym_t)props_obj;
                props_key = prop_dictionary_keysym_value(props_keysym);
                props_obj = prop_dictionary_get_keysym(new_dict, props_keysym);
                if ((props_obj == NULL) || !prop_dictionary_set(existing_dict,
                    props_key, props_obj)) {
                        errx(EXIT_FAILURE, "Failed to copy "
                            "existing property list");
                }
        }
        prop_object_iterator_release(props_iter);

        return;
}