/*
 * JSONparseCore.h
 *
 *  Created on: 5 Mar 2017
 *      Author: wentzelc
 */

#ifndef REDACORE_JSONPARSECORE_H_
#define REDACORE_JSONPARSECORE_H_

// Standard C/C++ Libraries
#include <string.h>
#include <ctype.h>
#include <unistd.h>

// redA Libraries
#include "DataTreeCore.h"
#include "CharBufferCore.h"

//---------------------------------------------------------------------------

// Pointer template for File/String Output functions
class CJSONparse;
inline ssize_t JSONstrOutput( CJSONparse * JSONparse, const char * Data, size_t Len );
inline ssize_t JSONfileOutput( CJSONparse * JSONparse, const char * Data, size_t Len );

typedef ssize_t (*FOutput)( CJSONparse * JSONparse, const char * Data, size_t Len );

//---------------------------------------------------------------------------

class CJSONparse
{
protected:
    CDataMember     * DataTree  = NULL;

    // File operation
    int     InputHandle     = -1;
    int     OutputHandle    = -1;
    char    * OutputStr     = NULL;
    size_t  OutputMaxLen    = 0;
    size_t  OutputPos       = 0;

    CShiftBuffer    * Buffer    = NULL;

    // Parsing operation
    char    * BufPos        = NULL;
    char    * Mark          = NULL;
    int     LineNo          = 0;
    int     CharNo          = 0;
    bool    RefillBuffer    = false;

    // Printing Operation
    FOutput Print           = NULL;
    char    Spacer[100]     = "";
    int     SpacerLen       = 0;

    // Error
    bool    Error           = false;
    char    ErrorText[100]  = "";

    // Parsing functions
    void SkipWhiteSpace();
    bool ParseString( char ** Value, int &pLen );
    bool ParseObject( CDataMember * Object );
    bool ParseArray( CDataMember * Array );
    bool ParseString( CDataMember * Member );
    bool ParsePrimitive( CDataMember * Member );

    bool PrintString( char * String, int Len );
    bool PrintObject( CDataMember * Object, const int Indent );
    bool PrintArray( CDataMember * Object, const int Indent );

public:
    CJSONparse();
    CJSONparse( CDataMember * pDataTree );
    ~CJSONparse();

    // Tree
    bool SetBase( CDataMember * Object );

    // Buffer operation
    bool CreateBuffer( int pBufLen );
    bool FillBuffer();
    void FreeBuffer();
    bool ReadFromBuffer( const char * BasePath );

    // Input
    bool ReadFromString( const char * BasePath, const char * InString, const int Len );
    bool ReadFromHandle( const char * BasePath, const int Handle, bool pRefillBuffer );
    bool ReadFromFile( const char * BasePath, const char * Path, const char * FileName );
    bool ReadFromFile( const char * BasePath, const char * FilePath );

    // Output
    bool WriteToString( const char * BasePath, char * TargetStr, int &MaxLen, const int Indent = 0 );
    bool WriteToHandle( const char * BasePath, const int Handle, const int Indent = 2 );
    bool WriteToScreen( const char * BasePath, const int Indent = 2 );
    bool WriteToFile( const char * BasePath, const char * Path, const char * FileName, const int Indent = 2 );
    bool WriteToFile( const char * BasePath, const char * FilePath, const int Indent = 2 );

    const char * GetError() { return ((Error)? ErrorText : "Success"); };

    friend inline ssize_t JSONstrOutput( CJSONparse * JSONparse, const char * Data, size_t Len );
    friend inline ssize_t JSONfileOutput( CJSONparse * JSONparse, const char * Data, size_t Len );
};
//---------------------------------------------------------------------------

inline ssize_t JSONstrOutput( CJSONparse * JSONparse, const char * Data, size_t Len )
{
    if (JSONparse->OutputPos + Len > JSONparse->OutputMaxLen) return -1;
    memcpy( &JSONparse->OutputStr[JSONparse->OutputPos], Data, Len );
    JSONparse->OutputPos += Len;
    JSONparse->OutputStr[JSONparse->OutputPos] = 0;
    return Len;
}
//---------------------------------------------------------------------------

inline ssize_t JSONfileOutput( CJSONparse * JSONparse, const char * Data, size_t Len )
{
    return write( JSONparse->OutputHandle, Data, Len );
}
//---------------------------------------------------------------------------

#endif /* REDACORE_JSONPARSECORE_H_ */