/*
 * FunctionCore.h
 *
 *  Created on: 18 May 2016
 *      Author: wentzelc
 */

#ifndef REDACORE_FUNCTIONCORE_H_
#define REDACORE_FUNCTIONCORE_H_

// Standard C/C++ Libraries
/* none */

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

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

// Preview
typedef struct SChannel         TChannel;
typedef struct SChannelLink     TChannelLink;
typedef struct SProcessBuffer   TProcessBuffer;
typedef struct SProcessItem     TProcessItem;

class CFunctionCore;

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

struct SChannel
{
    char            * Name;

    TChannelLink    * FirstInput;
    TChannelLink    * FirstOutput;

    bool            InputEnabled;
    bool            OutputEnabled;

    TProcessBuffer  * InputBuffer;

    TChannel        * Next;
};
//---------------------------------------------------------------------------

struct SChannelLink
{
    CFunctionCore   * Function;
    char            * Name;

    SChannelLink    * Next;
};
//---------------------------------------------------------------------------

struct SProcessBuffer
{
    // Process buffer
    char                * Name;                 // Name of buffer;
    CItemBufferCore     Buffer;                 // Message buffer
    unsigned long       LastRefNo;              // Last RefNo for item

    // Input parameters
    bool        PassthroughCallback;            // Send Callback once processed message has been passed on, else once processed

    // Output parameters
    TChannel    * OutputChannel;                // Channel to which to pass buffer output
    bool        OutputCallback;                 // Expect callback on output?

    TProcessBuffer      * Next;                 // Next buffer in list
};
//---------------------------------------------------------------------------

struct SProcessItem
{
    // Input Parameters
    TChannel        * SourceChannel;
    char            * SourceRef;
    bool            SourceCallback;

    // Processing Parameters
    bool            Processed;
    bool            Completed;

    // Output Parameters
    timeval         CallbackTimer;
    TChannelLink    FirstOutput;

    // Input Data
    void            * DataIn;
    int             DataInLen;

    // Output Data
    void            * DataOut;
    int             DateOutLen;
};
//---------------------------------------------------------------------------

class CFunctionCore_not_used
{
protected:
    // Function Definition
    char    * Name;
    char    * Type;

    // Configuration
    CDataTree   * DataTree;
    TDataMember * ConfigMember;
    TDataMember * LinkConfigMember;

    // Channels
    TChannel     * FirstChannel;

    // Processing Queues
    TProcessBuffer  * FirstProcessBuffer;

    // Logging
    CLogCore    * Log;
    EDebugLevel LogLevel;
    int         LogOutput;

    // Stored Output
    char        * StoredOutput;
    int         StoredOutputLen;

    // Manage Channel
    inline TChannel *  GetChannel( const char * Name ) {
        if (!Name) return NULL;
        TChannel * Channel = FirstChannel;
        while (Channel && strcmp( Name, Channel->Name ))
            Channel = Channel->Next;
        return Channel;
    }

    // Load configuration
    virtual bool  LoadConfigData();
    virtual bool  LoadChannelLinkData();

    // Data Input/Output
    virtual int  Output( const TChannel * Channel, const char * Data, int Len );
    virtual bool PullInput( TChannel * Channel );

    // Processing Queue
    TProcessItem *  CreateProcessItem();

public:
    // Life cycle
    CFunctionCore_not_used( const char * pName, const char * Type );
    virtual ~CFunctionCore_not_used();

    // Load Configuration
    virtual bool  Init();

    bool  InitConfig( const char * pConfigPath );
    bool  InitConfig( TDataMember * pConfigMember );

    bool  InitChannelLinks( const char * pLinkConfigPath );
    bool  InitChannelLinks( TDataMember *pLinkConfigMember );

    // Set Parameters Manually
    bool  SetLogParam( EDebugLevel pDebugLevel, int pOutputDisplay );
    bool  SetLogLevel( EDebugLevel pDebugLevel );

    // Miscellaneous
    inline const char * GetName()   { return Name; };
    inline const char * GetType()   { return Type; };

    // Manage Channels
    virtual TChannel *  AddChannel( const char * ChannelName, const bool pInputEnable = true, const bool pOutputEnabled = true );
    inline bool        SetChannelOutEnable( const char * ChannelName, const bool pOutputEnable ) {
        TChannel * Channel = GetChannel( ChannelName );
        if (!Channel) return false;
        Channel->OutputEnabled = pOutputEnable;
        return true;
    }
    inline bool        SetChannelInEnable( const char * ChannelName, const bool pInputEnable ) {
        TChannel * Channel = GetChannel( ChannelName );
        if (!Channel) return false;
        Channel->InputEnabled = pInputEnable;
        return true;
    }
    inline bool         isInputEnabled( const char * ChannelName ) {
        TChannel * Channel = GetChannel( ChannelName );
        return ((Channel)? Channel->InputEnabled : false);
    }
    inline bool         isOutputEnabled( const char * ChannelName ) {
        TChannel * Channel = GetChannel( ChannelName );
        return ((Channel)? Channel->OutputEnabled : false);
    }

    // Pushing Data Output -> Input
    virtual int Output( const char * ChannelName, const char * Data, int Len = -1 );
    virtual int Input( const char * ChannelName, const char * Data, int Len = -1 );

    // Pulling Data Input <- Output
    virtual bool PullInput( const char * ChannelName );
    virtual bool PullOutput( const char * ChannelName, char ** Data, int * Len = NULL );

    // Manages Process Buffers
    TProcessBuffer * CreateProcessBuffer( const char * Name );
    TProcessBuffer * GetProcessBuffer( const char * Name );

    TProcessItem *  CreateProcessItem( const char * BufferName );
    TProcessItem *  GetProcessItem( const char BufferName, const int Ref );
    bool            DestroyProcessItem( const char * BufferName, const int Ref );

    // Queued Output
    virtual bool OutputMessage( TChannel * SourceChannel, const char * TargetChannelName, const int RefNo, bool Callback, const char * Data, int Len = -1 );
    virtual bool OutputMessageCallback( TChannel * SourceChannel, const char * TargetChannelName, const int RefNo, const bool Success, const char * Error );
    virtual bool InputMessage( TChannel * SourceChannel, const char * TargetChannelName, const int RefNo, bool Callback, const char * Data, int Len = -1 );
    virtual bool InputMessageCancel( TChannel * SourceChannel, const char * TargetChannelName, const int RefNo );

    // Automated Data Input/Output
    virtual bool LinkInputChannel( const char * ChannelName, const char * OutFunctionName, const char * OutChannelName, bool Bidirectional );
    virtual bool LinkOutputChannel( const char * ChannelName, const char * InFunctionName, const char * InChannelName, bool Bidirectional );
    virtual bool Process() = 0;
};

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

#endif /* REDACORE_FUNCTIONCORE_H_ */