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

// redA Libraries
#include "FunctionCore.h"
#include "TimingCore.h"
#include "LogCore.h"

// Standard C/C++ Libraries
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

extern char * ProcessName;

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

// Life cycle
CFunctionCore::CFunctionCore( const char * FunctionName, CLogCore * pLog, EDebugLevel pDebugLevel, int pOuputDisplay )
{
    // Set name
    if (FunctionName) {
        Name = (char*)malloc( strlen(FunctionName)+1 );
        strcpy( Name, FunctionName );
    }
    else {
        Name = NULL;
    }

    // Data Tree
    DataTree        = NULL;
    BaseMember      = NULL;

    // Channels
    FirstChannel    = NULL;

    // Output
    Log             = pLog;
    OutputDisplay   = pOuputDisplay;
    DebugLevel      = pDebugLevel;

    // Report status
    if (Log)  Log->Message( DebugLevel, dlLow, "%s: Function '%s' - Created", ProcessName, FunctionName );
}
//---------------------------------------------------------------------------

CFunctionCore::~CFunctionCore()
{
    TChannel        * NextChannel           = NULL;
    TChannelLink    * NextLinkedChannel     = NULL;

    // Destroy Channels
    while (FirstChannel)
    {
        // Destroy Parameters
        if (FirstChannel->Name) {
            free( FirstChannel->Name );
        }

        // Destroy Linked Inputs
        while (FirstChannel->FirstInput) {
            if (FirstChannel->FirstInput->Name) {
                free( FirstChannel->FirstInput->Name );
            }
            NextLinkedChannel = FirstChannel->FirstInput->Next;
            free( FirstChannel->FirstInput );
            FirstChannel->FirstInput = NextLinkedChannel;
        }

        // Destroy Linked Outputs
        while (FirstChannel->FirstOutput) {
            if (FirstChannel->FirstOutput->Name) {
                free( FirstChannel->FirstOutput->Name );
            }
            NextLinkedChannel = FirstChannel->FirstOutput->Next;
            free( FirstChannel->FirstOutput );
            FirstChannel->FirstOutput = NextLinkedChannel;
        }

        // Destroy Channel
        NextChannel = FirstChannel->Next;
        free( FirstChannel );
        FirstChannel = NextChannel;
    }

    // Report status
    if (Log)  Log->Message( DebugLevel, dlLow, "%s: Function '%s' - Destroyed", ProcessName, Name );

    // Destroy Name
    if (Name) {
        free( Name );
    }
}
//---------------------------------------------------------------------------

bool  CFunctionCore::LoadConfig( CDataTree * pDataTree, const char * pBasePath )
{
    if (!(DataTree = pDataTree))
        return false;
    if (!(BaseMember = DataTree->GetMember( NULL, pBasePath, true )))
        return false;

    return true;
}
//---------------------------------------------------------------------------

TChannel * CFunctionCore::AddChannel( const char * ChannelName, const bool pInputEnable, const bool pOutputEnable )
{
    TChannel    ** Channel  = NULL;

    // Validate
    if (!ChannelName) {
        return NULL;
    }

    // Check if exists
    Channel = &FirstChannel;
    while (*Channel && strcmp( ChannelName, (*Channel)->Name )) {
        Channel = &((*Channel)->Next);
    }

    // Create if not exist
    if (!*Channel) {
        // Create
        *Channel = (TChannel*)malloc( sizeof(TChannel) );
        memset( *Channel, 0, sizeof(TChannel) );

        // Set Name
        (*Channel)->Name = (char*)malloc( strlen(ChannelName)+1 );
        strcpy( (*Channel)->Name, ChannelName );

        // Log Event
        if (Log)  Log->Message( DebugLevel, dlLow, "%s: Channel '%s' - Created", Name, ChannelName );
    }

    // Set parameters
    (*Channel)->InputEnabled    = pInputEnable;
    (*Channel)->OutputEnabled   = pOutputEnable;

    return *Channel;
}
//---------------------------------------------------------------------------

// Automated Data Input/Output
bool CFunctionCore::LinkInputChannel( const char * ChannelName, CFunctionCore * OutFunction, const char * OutChannelName, bool Bidirectional )
{
    TChannel        * Channel           = NULL;
    TChannelLink    ** LinkedChannel    = NULL;

    // Get Channel
    if (!OutFunction || !OutFunction || !(Channel = GetChannel( ChannelName ))) {
        return false;
    }

    // Check if linked Channel exists
    LinkedChannel = &(Channel->FirstInput);
    while (*LinkedChannel && (((*LinkedChannel)->Function != OutFunction) || strcmp( (*LinkedChannel)->Name, OutChannelName ) )) {
        LinkedChannel = &((*LinkedChannel)->Next);
    }

    // Create if not found
    if (!*LinkedChannel)
    {
        // Create
        *LinkedChannel = (TChannelLink*)malloc( sizeof(TChannelLink) );
        memset( *LinkedChannel, 0, sizeof( TChannelLink ));

        // Set Parameters
        (*LinkedChannel)->Function = OutFunction;
        (*LinkedChannel)->Name = (char*)malloc( strlen(OutChannelName)+1 );
        strcpy( (*LinkedChannel)->Name, OutChannelName );

        // Log Event
        if (Log)  Log->Message( DebugLevel, dlLow, "%s: Input Linked - '%s'/'%s' <-- '%s'/'%s'", Name, Name, ChannelName, OutFunction->GetName(), OutChannelName );
    }

    // Link Return direction as well
    if (Bidirectional) {
        return OutFunction->LinkInputChannel( OutChannelName, this, ChannelName, false );
    }

    return true;
}
//---------------------------------------------------------------------------

bool CFunctionCore::LinkOutputChannel( const char * ChannelName, CFunctionCore * InFunction, const char * InChannelName, bool Bidirectional )
{
    TChannel        * Channel           = NULL;
    TChannelLink    ** LinkedChannel    = NULL;

    // Get Channel
    if (!InFunction || !InChannelName || !(Channel = GetChannel( ChannelName ))) {
        return false;
    }

    // Check if linked Channel exists
    LinkedChannel = &(Channel->FirstOutput);
    while (*LinkedChannel && (((*LinkedChannel)->Function != InFunction) || strcmp( (*LinkedChannel)->Name, InChannelName ) )) {
        LinkedChannel = &((*LinkedChannel)->Next);
    }

    // Create if not found
    if (!*LinkedChannel)
    {
        // Create
        *LinkedChannel = (TChannelLink*)malloc( sizeof(TChannelLink) );
        memset( *LinkedChannel, 0, sizeof( TChannelLink ));

        // Set Parameters
        (*LinkedChannel)->Function = InFunction;
        (*LinkedChannel)->Name = (char*)malloc( strlen(InChannelName)+1 );
        strcpy( (*LinkedChannel)->Name, InChannelName );

        // Log Event
        if (Log)  Log->Message( DebugLevel, dlLow, "%s: Output Linked - '%s'/'%s' --> '%s'/'%s'", Name, Name, ChannelName, InFunction->GetName(), InChannelName );
    }

    // Link return direction as well
    if (Bidirectional) {
        return InFunction->LinkOutputChannel( InChannelName, this, ChannelName, false );
    }

    return true;
}
//---------------------------------------------------------------------------

// Manual Data Input/Output
int CFunctionCore::Input( const char * ChannelName, const char * Data, int MaxLen )
{
    TChannel    * Channel   = NULL;

    // Validate
    if (!ChannelName || !Data) {
        return 0;
    }

    // Get Channel
    if (!(Channel = GetChannel( ChannelName ))) {
        // Channel not found
        if (Log)  Log->Message( DebugLevel, dlHigh, "%s: Channel '%s' - Input rejected, Channel not found", Name, ChannelName );
        return 0;
    }
    else if (!Channel->InputEnabled) {
        // Channel disabled
        if (Log)  Log->Message( DebugLevel, dlHigh, "%s: Channel '%s' - Input rejected, Channel input disabled", Name, ChannelName );
        return 0;
    }
    else {
        // Return processed bytes
        if (MaxLen == -1) {
            MaxLen = strlen( Data );
        }
        if (Log)  Log->Output( DebugLevel, dlHigh, OutputDisplay, Data, MaxLen, "%s: Channel '%s' - IN:", Name, ChannelName );
        return MaxLen;
    }
}
//---------------------------------------------------------------------------

int CFunctionCore::Output( const char * ChannelName, const char * Data, int Len )
{
    TChannel    * Channel   = NULL;

    // Validate
    if (!ChannelName) {
        return 0;
    }

    // Get Channel
    if (!(Channel = GetChannel( ChannelName ))) {
        if (Log)  Log->Message( DebugLevel, dlHigh, "%s: Channel '%s' - Output rejected, Channel not found", Name, ChannelName );
        return 0;
    }
    else {
        // Return processed bytes
        return Output( Channel, Data, Len );
    }
}
//---------------------------------------------------------------------------

int CFunctionCore::Output( const TChannel * Channel, const char * Data, int Len )
{
    TChannelLink   * OutChannel    = NULL;

    // Validate
    if (!Channel || !Data) {
        return 0;
    }

    // Check if enabled
    if (!Channel->OutputEnabled) {
        if (Log)  Log->Message( DebugLevel, dlHigh, "%s: Channel '%s' - Output rejected, Channel output disabled", Name, Channel->Name );
        return 0;
    }

    // Log event
    if (Log)  Log->Output( DebugLevel, dlHigh, OutputDisplay, Data, Len, "%s: Channel '%s' - OUT:", Name, Channel->Name );

    // Pass output to all linked inputs
    if (Len == -1) {
        Len = strlen( Data );
    }
    OutChannel = Channel->FirstOutput;
    while (OutChannel) {
        OutChannel->Function->Input( OutChannel->Name, Data, Len );
        OutChannel = OutChannel->Next;
    }

    // Return processed bytes
    return Len;
}
//---------------------------------------------------------------------------