/* main.c */

/*
    This program demonstrates a simple application of JSON_parser. It reads
    a JSON text from STDIN, producing an error message if the text is rejected.

        % JSON_parser <test/pass1.json
*/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <locale.h>

#include "json.h"

#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>

static int level = 0;
static int got_key = 0;

static void print_indent()
{
    printf ("%*s", 2 * level, "");
}
 
static bool array_begin (void *data)
{
    if (!got_key) print_indent(); else got_key = 0;
    printf ("[\n");
    ++level;
    return true;
}

static bool array_end (void *data)
{
    --level;
    print_indent ();
    printf ("]\n");
    return true;
}

static bool object_begin (void *data)
{
    if (!got_key) print_indent(); else got_key = 0;
    printf ("{\n");
    ++level;
    return true;
}

static bool object_end (void *data)
{
    --level;
    print_indent ();
    printf ("}\n");
    return true;
}

static bool key (void *data, const char *buf, size_t n)
{
    got_key = 1;
    print_indent ();
    if (buf)
	printf ("key = '%s', value = ", buf);
    else
	printf ("user key = %%%c, value = ", getchar());
    return true;
}

static bool value_integer (void *data, long long ll)
{
    if (!got_key) print_indent(); else got_key = 0;
    printf ("integer: %lld\n", ll);
    return true;
}

static bool value_float (void *data, double d)
{
    if (!got_key) print_indent(); else got_key = 0;
    printf ("float: %f\n", d);
    return true;
}

static bool value_null (void *data)
{
    if (!got_key) print_indent(); else got_key = 0;
    printf ("null\n");
    return true;
}

static bool value_boolean (void *data, int val)
{
    if (!got_key) print_indent(); else got_key = 0;
    printf ("%s\n", val ? "true" : "false");
    return true;
}

static bool value_string (void *data, const char *buf, size_t n)
{
    if (!got_key) print_indent(); else got_key = 0;
    printf ("string: '%s'\n", buf);
    return true;
}

static bool value_user (void *data)
{
    if (!got_key) print_indent(); else got_key = 0;
    printf ("user: %%%c\n", getchar());
    return true;
}



int main(int argc, char* argv[]) {
    static struct json_parser_config parser_config = {
        .array_begin = array_begin,
        .array_end = array_end,
        .object_begin = object_begin,
        .object_end = object_end,
        .key = key,
        .value_integer = value_integer,
        .value_float = value_float,
        .value_null = value_null,
        .value_boolean = value_boolean,
        .value_string = value_string,
        .value_user = value_user,
    };

    struct json_parser *p = json_parser_new(&parser_config);
    int count = 0;
    int ch;
    while ((ch = getchar ()) != EOF && json_parser_char (p, ch))
	count++;

    if (ch != EOF) {
	fprintf (stderr, "error at character %d\n", count);
	exit (1);
    }
    if (!json_parser_destroy (p)) {
	fprintf (stderr, "error at end of file\n");
	exit (1);
    }

    exit (0);
}