/**
 * vim: set ts=4 :
 * =============================================================================
 * sm-json
 * A pure SourcePawn JSON encoder/decoder.
 * https://github.com/clugg/sm-json
 *
 * sm-json (C)2022 James Dickens. (clug)
 * SourceMod (C)2004-2008 AlliedModders LLC.  All rights reserved.
 * =============================================================================
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, version 3.0, as published by the
 * Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As a special exception, AlliedModders LLC gives you permission to link the
 * code of this program (as well as its derivative works) to "Half-Life 2," the
 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
 * by the Valve Corporation.  You must obey the GNU General Public License in
 * all respects for all other code used.  Additionally, AlliedModders LLC grants
 * this exception to all derivative works.  AlliedModders LLC defines further
 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
 * or <http://www.sourcemod.net/license.php>.
 */

#if defined _json_definitions_included
 #endinput
#endif
#define _json_definitions_included

#include <string>
#include <json/helpers/string>

#define SM_INT64_SUPPORTED SOURCEMOD_V_MAJOR >= 1 \
    && SOURCEMOD_V_MINOR >= 11 \
    && SOURCEMOD_V_REV >= 6861

/**
 * @section Settings
 */

/** Used when no options are desired. */
#define JSON_NONE 0

/**
 * @section json_encode settings
 */

/** Should encoded output be pretty printed? */
#define JSON_ENCODE_PRETTY 1 << 0

/**
 * @section json_decode settings
 */

/** Should single quote wrapped strings be accepted during decoding? */
#define JSON_DECODE_SINGLE_QUOTES 1 << 0

/**
 * @section json_merge settings
 */

/** During merge, should existing keys be replaced if they exist in both objects? */
#define JSON_MERGE_REPLACE 1 << 0

/** During merge, should existing objects be cleaned up if they exist in
 * both objects? (only applies when JSON_MERGE_REPLACE is also set) */
#define JSON_MERGE_CLEANUP 1 << 1

/**
 * @section Pretty Print Constants
 *
 * Used to determine how pretty printed JSON should be formatted when encoded.
 * You can modify these if you prefer your JSON formatted differently.
 */

char JSON_PP_AFTER_COLON[32] = " ";
char JSON_PP_INDENT[32] = "    ";
char JSON_PP_NEWLINE[32] = "\n";

/**
 * @section Buffer Size Constants
 */

/** The longest representable integer ("-2147483648") + NULL terminator */
#define JSON_INT_BUFFER_SIZE 12

#if SM_INT64_SUPPORTED
/** The longest representable int64 ("-9223372036854775808") + NULL terminator */
#define JSON_INT64_BUFFER_SIZE 21
#endif

/** You may need to change this if you are working with large floats. */
#define JSON_FLOAT_BUFFER_SIZE 32

/** "true"|"false" + NULL terminator */
#define JSON_BOOL_BUFFER_SIZE 6

/** "null" + NULL terminator */
#define JSON_NULL_BUFFER_SIZE 5

/**
 * @section Array/Object Constants
 */

#define JSON_ARRAY_KEY "is_array"
#define JSON_ENFORCE_TYPE_KEY "enforce_type"

/**
 * Types of cells within a JSON object
 */
enum JSONCellType {
    JSON_Type_Invalid = -1,
    JSON_Type_String = 0,
    JSON_Type_Int,
    #if SM_INT64_SUPPORTED
    JSON_Type_Int64,
    #endif
    JSON_Type_Float,
    JSON_Type_Bool,
    JSON_Type_Object
};

/**
 * Types of metadata a JSON element can have
 */
enum JSONMetaInfo {
    JSON_Meta_Type = 0,
    JSON_Meta_Size,
    JSON_Meta_Hidden,
    JSON_Meta_Index
}

/**
 * An array of all possible meta info values.
 */
JSONMetaInfo JSON_ALL_METADATA[4] = {
    JSON_Meta_Type, JSON_Meta_Size, JSON_Meta_Hidden, JSON_Meta_Index
};

/**
 * Calculates the length required to store a meta key
 * for a specified key/metainfo combination.
 * @internal
 *
 * @param   key
 * @return  The length required to store the meta key.
 */
stock int json_meta_key_length(const char[] key)
{
    // %s:%d
    return strlen(key) + 1 + JSON_INT_BUFFER_SIZE;
}

/**
 * Formats the key/metainfo combination into a buffer.
 * @internal
 *
 * @param output    String buffer to store output.
 * @param max_size  Maximum size of string buffer.
 * @param key       Key to generate metakey for.
 * @param meta      Meta information to generate metakey for.
 */
stock void json_format_meta_key(
    char[] output,
    int max_size,
    const char[] key,
    JSONMetaInfo meta
)
{
    FormatEx(output, max_size, "k|%s:%d", key, view_as<int>(meta));
}