// Copyright 2015-2021 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef UTIL_H_
#define UTIL_H_

#include "natsp.h"

#define JSON_MAX_NEXTED 100

extern int jsonMaxNested;

#define TYPE_NOT_SET    (0)
#define TYPE_STR        (1)
#define TYPE_BOOL       (2)
#define TYPE_NUM        (3)
#define TYPE_INT        (4)
#define TYPE_UINT       (5)
#define TYPE_DOUBLE     (6)
#define TYPE_ARRAY      (7)
#define TYPE_OBJECT     (8)
#define TYPE_NULL       (9)

typedef struct
{
    void    **values;
    int     typ;
    int     eltSize;
    int     size;
    int     cap;

} nats_JSONArray;

typedef struct
{
    char        *str;
    natsStrHash *fields;

} nats_JSON;

typedef struct
{
    char    *name;
    int     typ;
    union
    {
            char            *vstr;
            bool            vbool;
            uint64_t        vuint;
            int64_t         vint;
            long double     vdec;
            nats_JSONArray  *varr;
            nats_JSON       *vobj;
    } value;
    int     numTyp;

} nats_JSONField;

typedef natsStatus (*jsonRangeCB)(void *userInfo, const char *fieldName, nats_JSONField *f);

#define snprintf_truncate(d, szd, f, ...) if (snprintf((d), (szd), (f), __VA_ARGS__) >= (int) (szd)) { \
    int offset = (int) (szd) - 2;         \
    if (offset > 0) (d)[offset--] = '.';  \
    if (offset > 0) (d)[offset--] = '.';  \
    if (offset > 0) (d)[offset--] = '.';  \
}

int64_t
nats_ParseInt64(const char *d, int dLen);

natsStatus
nats_Trim(char **pres, const char *s);

natsStatus
nats_ParseControl(natsControl *control, const char *line);

natsStatus
nats_CreateStringFromBuffer(char **newStr, natsBuffer *buf);

const char*
nats_GetBoolStr(bool value);

void
nats_NormalizeErr(char *error);

natsStatus
nats_JSONParse(nats_JSON **json, const char *str, int strLen);

natsStatus
nats_JSONGetField(nats_JSON *json, const char *fieldName, int fieldType, nats_JSONField **retField);

natsStatus
nats_JSONGetStr(nats_JSON *json, const char *fieldName, char **value);

natsStatus
nats_JSONGetStrPtr(nats_JSON *json, const char *fieldName, const char **str);

natsStatus
nats_JSONGetBytes(nats_JSON *json, const char *fieldName, unsigned char **value, int *len);

natsStatus
nats_JSONGetInt(nats_JSON *json, const char *fieldName, int *value);

natsStatus
nats_JSONGetInt32(nats_JSON *json, const char *fieldName, int32_t *value);

natsStatus
nats_JSONGetUInt16(nats_JSON *json, const char *fieldName, uint16_t *value);

natsStatus
nats_JSONGetBool(nats_JSON *json, const char *fieldName, bool *value);

natsStatus
nats_JSONGetLong(nats_JSON *json, const char *fieldName, int64_t *value);

natsStatus
nats_JSONGetULong(nats_JSON *json, const char *fieldName, uint64_t *value);

natsStatus
nats_JSONGetDouble(nats_JSON *json, const char *fieldName, long double *value);

natsStatus
nats_JSONGetObject(nats_JSON *json, const char *fieldName, nats_JSON **value);

natsStatus
nats_JSONGetTime(nats_JSON *json, const char *fieldName, int64_t *timeUTC);

natsStatus
nats_JSONGetArrayField(nats_JSON *json, const char *fieldName, int fieldType, nats_JSONField **retField);

natsStatus
nats_JSONArrayAsStrings(nats_JSONArray *arr, char ***array, int *arraySize);

natsStatus
nats_JSONGetArrayStr(nats_JSON *json, const char *fieldName, char ***array, int *arraySize);

natsStatus
nats_JSONArrayAsBools(nats_JSONArray *arr, bool **array, int *arraySize);

natsStatus
nats_JSONGetArrayBool(nats_JSON *json, const char *fieldName, bool **array, int *arraySize);

natsStatus
nats_JSONArrayAsDoubles(nats_JSONArray *arr, long double **array, int *arraySize);

natsStatus
nats_JSONGetArrayDouble(nats_JSON *json, const char *fieldName, long double **array, int *arraySize);

natsStatus
nats_JSONArrayAsInts(nats_JSONArray *arr, int **array, int *arraySize);

natsStatus
nats_JSONGetArrayInt(nats_JSON *json, const char *fieldName, int **array, int *arraySize);

natsStatus
nats_JSONArrayAsLongs(nats_JSONArray *arr, int64_t **array, int *arraySize);

natsStatus
nats_JSONGetArrayLong(nats_JSON *json, const char *fieldName, int64_t **array, int *arraySize);

natsStatus
nats_JSONArrayAsULongs(nats_JSONArray *arr, uint64_t **array, int *arraySize);

natsStatus
nats_JSONGetArrayULong(nats_JSON *json, const char *fieldName, uint64_t **array, int *arraySize);

natsStatus
nats_JSONArrayAsObjects(nats_JSONArray *arr, nats_JSON ***array, int *arraySize);

natsStatus
nats_JSONGetArrayObject(nats_JSON *json, const char *fieldName, nats_JSON ***array, int *arraySize);

natsStatus
nats_JSONArrayAsArrays(nats_JSONArray *arr, nats_JSONArray ***array, int *arraySize);

natsStatus
nats_JSONGetArrayArray(nats_JSON *json, const char *fieldName, nats_JSONArray ***array, int *arraySize);

natsStatus
nats_JSONRange(nats_JSON *json, int expectedType, int expectedNumType, jsonRangeCB cb, void *userInfo);

void
nats_JSONDestroy(nats_JSON *json);

natsStatus
nats_EncodeTimeUTC(char *buf, size_t bufLen, int64_t timeUTC);

void
nats_Base32_Init(void);

natsStatus
nats_Base32_DecodeString(const char *src, char *dst, int dstMax, int *dstLen);

natsStatus
nats_Base64RawURL_EncodeString(const unsigned char *src, int srcLen, char **pDest);

natsStatus
nats_Base64_Encode(const unsigned char *src, int srcLen, char **pDest);

natsStatus
nats_Base64_DecodeLen(const char *src, int *srcLen, int *dstLen);

void
nats_Base64_DecodeInPlace(const char *src, int l, unsigned char *dst);

natsStatus
nats_Base64_Decode(const char *src, unsigned char **dst, int *dstLen);

uint16_t
nats_CRC16_Compute(unsigned char *data, int len);

bool
nats_CRC16_Validate(unsigned char *data, int len, uint16_t expected);

natsStatus
nats_ReadFile(natsBuffer **buffer, int initBufSize, const char *fn);

bool
nats_HostIsIP(const char *host);

natsStatus
nats_GetJWTOrSeed(char **val, const char *content, int item);

void
nats_FreeAddrInfo(struct addrinfo *res);

natsStatus
nats_marshalLong(natsBuffer *buf, bool comma, const char *fieldName, int64_t lval);

natsStatus
nats_marshalULong(natsBuffer *buf, bool comma, const char *fieldName, uint64_t uval);

bool
nats_IsSubjectValid(const char *subject, bool wcAllowed);

natsStatus
nats_parseTime(char *str, int64_t *timeUTC);

#endif /* UTIL_H_ */