// Tencent is pleased to support the open source community by making RapidJSON available.
//
// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip.
//
// Licensed under the MIT License (the "License"); you may not use this file except
// in compliance with the License. You may obtain a copy of the License at
//
// http://opensource.org/licenses/MIT
//
// 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 RAPIDJSON_ERROR_ERROR_H_
#define RAPIDJSON_ERROR_ERROR_H_

#include "../rapidjson.h"

#ifdef __clang__
RAPIDJSON_DIAG_PUSH
RAPIDJSON_DIAG_OFF(padded)
#endif

/*! \file error.h */

/*! \defgroup RAPIDJSON_ERRORS RapidJSON error handling */

///////////////////////////////////////////////////////////////////////////////
// RAPIDJSON_ERROR_CHARTYPE

//! Character type of error messages.
/*! \ingroup RAPIDJSON_ERRORS
    The default character type is \c char.
    On Windows, user can define this macro as \c TCHAR for supporting both
    unicode/non-unicode settings.
*/
#ifndef RAPIDJSON_ERROR_CHARTYPE
#define RAPIDJSON_ERROR_CHARTYPE char
#endif

///////////////////////////////////////////////////////////////////////////////
// RAPIDJSON_ERROR_STRING

//! Macro for converting string literal to \ref RAPIDJSON_ERROR_CHARTYPE[].
/*! \ingroup RAPIDJSON_ERRORS
    By default this conversion macro does nothing.
    On Windows, user can define this macro as \c _T(x) for supporting both
    unicode/non-unicode settings.
*/
#ifndef RAPIDJSON_ERROR_STRING
#define RAPIDJSON_ERROR_STRING(x) x
#endif

RAPIDJSON_NAMESPACE_BEGIN

///////////////////////////////////////////////////////////////////////////////
// ParseErrorCode

//! Error code of parsing.
/*! \ingroup RAPIDJSON_ERRORS
    \see GenericReader::Parse, GenericReader::GetParseErrorCode
*/
enum ParseErrorCode
{
    kParseErrorNone = 0, //!< No error.

    kParseErrorDocumentEmpty,           //!< The document is empty.
    kParseErrorDocumentRootNotSingular, //!< The document root must not follow by other values.

    kParseErrorValueInvalid, //!< Invalid value.

    kParseErrorObjectMissName,                //!< Missing a name for object member.
    kParseErrorObjectMissColon,               //!< Missing a colon after a name of object member.
    kParseErrorObjectMissCommaOrCurlyBracket, //!< Missing a comma or '}' after an object member.

    kParseErrorArrayMissCommaOrSquareBracket, //!< Missing a comma or ']' after an array element.

    kParseErrorStringUnicodeEscapeInvalidHex, //!< Incorrect hex digit after \\u escape in string.
    kParseErrorStringUnicodeSurrogateInvalid, //!< The surrogate pair in string is invalid.
    kParseErrorStringEscapeInvalid,           //!< Invalid escape character in string.
    kParseErrorStringMissQuotationMark,       //!< Missing a closing quotation mark in string.
    kParseErrorStringInvalidEncoding,         //!< Invalid encoding in string.

    kParseErrorNumberTooBig,       //!< Number too big to be stored in double.
    kParseErrorNumberMissFraction, //!< Miss fraction part in number.
    kParseErrorNumberMissExponent, //!< Miss exponent in number.

    kParseErrorTermination,          //!< Parsing was terminated.
    kParseErrorUnspecificSyntaxError //!< Unspecific syntax error.
};

//! Result of parsing (wraps ParseErrorCode)
/*!
    \ingroup RAPIDJSON_ERRORS
    \code
        Document doc;
        ParseResult ok = doc.Parse("[42]");
        if (!ok) {
            fprintf(stderr, "JSON parse error: %s (%u)",
                    GetParseError_En(ok.Code()), ok.Offset());
            exit(EXIT_FAILURE);
        }
    \endcode
    \see GenericReader::Parse, GenericDocument::Parse
*/
struct ParseResult
{
    //!! Unspecified boolean type
    typedef bool (ParseResult::*BooleanType)() const;

    public:
    //! Default constructor, no error.
    ParseResult() : code_(kParseErrorNone), offset_(0) {}
    //! Constructor to set an error.
    ParseResult(ParseErrorCode code, size_t offset) : code_(code), offset_(offset) {}

    //! Get the error code.
    ParseErrorCode Code() const { return code_; }
    //! Get the error offset, if \ref IsError(), 0 otherwise.
    size_t Offset() const { return offset_; }

    //! Explicit conversion to \c bool, returns \c true, iff !\ref IsError().
    operator BooleanType() const { return !IsError() ? &ParseResult::IsError : NULL; }
    //! Whether the result is an error.
    bool IsError() const { return code_ != kParseErrorNone; }

    bool operator==(const ParseResult& that) const { return code_ == that.code_; }
    bool operator==(ParseErrorCode code) const { return code_ == code; }
    friend bool operator==(ParseErrorCode code, const ParseResult& err)
    {
        return code == err.code_;
    }

    bool operator!=(const ParseResult& that) const { return !(*this == that); }
    bool operator!=(ParseErrorCode code) const { return !(*this == code); }
    friend bool operator!=(ParseErrorCode code, const ParseResult& err) { return err != code; }

    //! Reset error code.
    void Clear() { Set(kParseErrorNone); }
    //! Update error code and offset.
    void Set(ParseErrorCode code, size_t offset = 0)
    {
        code_   = code;
        offset_ = offset;
    }

    private:
    ParseErrorCode code_;
    size_t offset_;
};

//! Function pointer type of GetParseError().
/*! \ingroup RAPIDJSON_ERRORS

    This is the prototype for \c GetParseError_X(), where \c X is a locale.
    User can dynamically change locale in runtime, e.g.:
\code
    GetParseErrorFunc GetParseError = GetParseError_En; // or whatever
    const RAPIDJSON_ERROR_CHARTYPE* s = GetParseError(document.GetParseErrorCode());
\endcode
*/
typedef const RAPIDJSON_ERROR_CHARTYPE* (*GetParseErrorFunc)(ParseErrorCode);

///////////////////////////////////////////////////////////////////////////////
// ValidateErrorCode

//! Error codes when validating.
/*! \ingroup RAPIDJSON_ERRORS
    \see GenericSchemaValidator
*/
enum ValidateErrorCode
{
    kValidateErrors    = -1, //!< Top level error code when kValidateContinueOnErrorsFlag set.
    kValidateErrorNone = 0,  //!< No error.

    kValidateErrorMultipleOf,       //!< Number is not a multiple of the 'multipleOf' value.
    kValidateErrorMaximum,          //!< Number is greater than the 'maximum' value.
    kValidateErrorExclusiveMaximum, //!< Number is greater than or equal to the 'maximum' value.
    kValidateErrorMinimum,          //!< Number is less than the 'minimum' value.
    kValidateErrorExclusiveMinimum, //!< Number is less than or equal to the 'minimum' value.

    kValidateErrorMaxLength, //!< String is longer than the 'maxLength' value.
    kValidateErrorMinLength, //!< String is longer than the 'maxLength' value.
    kValidateErrorPattern,   //!< String does not match the 'pattern' regular expression.

    kValidateErrorMaxItems,        //!< Array is longer than the 'maxItems' value.
    kValidateErrorMinItems,        //!< Array is shorter than the 'minItems' value.
    kValidateErrorUniqueItems,     //!< Array has duplicate items but 'uniqueItems' is true.
    kValidateErrorAdditionalItems, //!< Array has additional items that are not allowed by the
                                   //!< schema.

    kValidateErrorMaxProperties, //!< Object has more members than 'maxProperties' value.
    kValidateErrorMinProperties, //!< Object has less members than 'minProperties' value.
    kValidateErrorRequired,      //!< Object is missing one or more members required by the schema.
    kValidateErrorAdditionalProperties, //!< Object has additional members that are not allowed by
                                        //!< the schema.
    kValidateErrorPatternProperties,    //!< See other errors.
    kValidateErrorDependencies,         //!< Object has missing property or schema dependencies.

    kValidateErrorEnum, //!< Property has a value that is not one of its allowed enumerated values.
    kValidateErrorType, //!< Property has a type that is not allowed by the schema.

    kValidateErrorOneOf, //!< Property did not match any of the sub-schemas specified by 'oneOf'.
    kValidateErrorOneOfMatch, //!< Property matched more than one of the sub-schemas specified by
                              //!< 'oneOf'.
    kValidateErrorAllOf, //!< Property did not match all of the sub-schemas specified by 'allOf'.
    kValidateErrorAnyOf, //!< Property did not match any of the sub-schemas specified by 'anyOf'.
    kValidateErrorNot,   //!< Property matched the sub-schema specified by 'not'.

    kValidateErrorReadOnly, //!< Property is read-only but has been provided when validation is for
                            //!< writing
    kValidateErrorWriteOnly //!< Property is write-only but has been provided when validation is for
                            //!< reading
};

//! Function pointer type of GetValidateError().
/*! \ingroup RAPIDJSON_ERRORS

    This is the prototype for \c GetValidateError_X(), where \c X is a locale.
    User can dynamically change locale in runtime, e.g.:
\code
    GetValidateErrorFunc GetValidateError = GetValidateError_En; // or whatever
    const RAPIDJSON_ERROR_CHARTYPE* s = GetValidateError(validator.GetInvalidSchemaCode());
\endcode
*/
typedef const RAPIDJSON_ERROR_CHARTYPE* (*GetValidateErrorFunc)(ValidateErrorCode);

///////////////////////////////////////////////////////////////////////////////
// SchemaErrorCode

//! Error codes when validating.
/*! \ingroup RAPIDJSON_ERRORS
    \see GenericSchemaValidator
*/
enum SchemaErrorCode
{
    kSchemaErrorNone = 0, //!< No error.

    kSchemaErrorStartUnknown, //!< Pointer to start of schema does not resolve to a location in the
                              //!< document
    kSchemaErrorRefPlainName, //!< $ref fragment must be a JSON pointer
    kSchemaErrorRefInvalid,   //!< $ref must not be an empty string
    kSchemaErrorRefPointerInvalid,   //!< $ref fragment is not a valid JSON pointer at offset
    kSchemaErrorRefUnknown,          //!< $ref does not resolve to a location in the target document
    kSchemaErrorRefCyclical,         //!< $ref is cyclical
    kSchemaErrorRefNoRemoteProvider, //!< $ref is remote but there is no remote provider
    kSchemaErrorRefNoRemoteSchema,   //!< $ref is remote but the remote provider did not return a
                                     //!< schema
    kSchemaErrorRegexInvalid,    //!< Invalid regular expression in 'pattern' or 'patternProperties'
    kSchemaErrorSpecUnknown,     //!< JSON schema draft or OpenAPI version is not recognized
    kSchemaErrorSpecUnsupported, //!< JSON schema draft or OpenAPI version is not supported
    kSchemaErrorSpecIllegal,     //!< Both JSON schema draft and OpenAPI version found in document
    kSchemaErrorReadOnlyAndWriteOnly //!< Property must not be both 'readOnly' and 'writeOnly'
};

//! Function pointer type of GetSchemaError().
/*! \ingroup RAPIDJSON_ERRORS

    This is the prototype for \c GetSchemaError_X(), where \c X is a locale.
    User can dynamically change locale in runtime, e.g.:
\code
    GetSchemaErrorFunc GetSchemaError = GetSchemaError_En; // or whatever
    const RAPIDJSON_ERROR_CHARTYPE* s = GetSchemaError(validator.GetInvalidSchemaCode());
\endcode
*/
typedef const RAPIDJSON_ERROR_CHARTYPE* (*GetSchemaErrorFunc)(SchemaErrorCode);

///////////////////////////////////////////////////////////////////////////////
// PointerParseErrorCode

//! Error code of JSON pointer parsing.
/*! \ingroup RAPIDJSON_ERRORS
    \see GenericPointer::GenericPointer, GenericPointer::GetParseErrorCode
*/
enum PointerParseErrorCode
{
    kPointerParseErrorNone = 0, //!< The parse is successful

    kPointerParseErrorTokenMustBeginWithSolidus, //!< A token must begin with a '/'
    kPointerParseErrorInvalidEscape,             //!< Invalid escape
    kPointerParseErrorInvalidPercentEncoding,    //!< Invalid percent encoding in URI fragment
    kPointerParseErrorCharacterMustPercentEncode //!< A character must percent encoded in URI
                                                 //!< fragment
};

//! Function pointer type of GetPointerParseError().
/*! \ingroup RAPIDJSON_ERRORS

    This is the prototype for \c GetPointerParseError_X(), where \c X is a locale.
    User can dynamically change locale in runtime, e.g.:
\code
    GetPointerParseErrorFunc GetPointerParseError = GetPointerParseError_En; // or whatever
    const RAPIDJSON_ERROR_CHARTYPE* s = GetPointerParseError(pointer.GetParseErrorCode());
\endcode
*/
typedef const RAPIDJSON_ERROR_CHARTYPE* (*GetPointerParseErrorFunc)(PointerParseErrorCode);

RAPIDJSON_NAMESPACE_END

#ifdef __clang__
RAPIDJSON_DIAG_POP
#endif

#endif // RAPIDJSON_ERROR_ERROR_H_
