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

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

// redA Libraries
#include "ApplicationCore.h"
#include "FunctionCore.h"

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

// Global Vars
extern char         * ProcessName;
extern CApplication * Application;

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

// Function Constructor
//CFunctionCore * NewFunctionCore( const char * Name ) {
//    return new CFunctionCore( Name, "Function" );
//}
//---------------------------------------------------------------------------

// Life cycle
CFunctionCore::CFunctionCore( const char * pName, const char * pType ) : Type( pType )
{
    // Set name
    if (pName)
        Name = strdup( pName );

    // Logging
    Log         = Application->Log;
    LogLevel    = dlNone;
    LogOutput   = loNormal;
}
//---------------------------------------------------------------------------

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

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

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

        // Destroy Channel
        NextChannel = FirstChannel->Next;
        delete FirstChannel;
        FirstChannel = NextChannel;
    }

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

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

bool  CFunctionCore::Init( CDataMember * FunctionConfig )
{
    // Load configuration
    CDataMember     * LogConfig;
    CDataMember     * ChannelConfig;
    EDebugLevel     pLogLevel;
    int             pLogOutput;
    char            * ConfigName    = NULL;

    // Validate
    if (!FunctionConfig )
        return false;

    // Set Type
    FunctionConfig->SetChStr( "Type", Type );

    // Configure Logging/Debugging
    LogConfig  = FunctionConfig->GetChild( "Log", true );
    pLogLevel  = Log->ReadLogLevel( LogConfig );
    pLogOutput = Log->ReadLogOutput( LogConfig );
    SetLogParam( pLogLevel, pLogOutput );

    // Load Channels
    ChannelConfig = FunctionConfig->GetChFirstChild( "Channels", true );
    while (ChannelConfig)
    {
        if (ChannelConfig->GetName()) {
            AddChannel( ChannelConfig->GetName(),
                        ChannelConfig->GetChBool( "InputEnabled", true, true ),
                        ChannelConfig->GetChBool( "OutputEnabled", false, true ));
        }
        ChannelConfig = ChannelConfig->GetNextPeer();
    }

    // Get main configuration
    if ((Config = FunctionConfig->GetChild( "Config", true )) && Config->isString()) {
        ConfigName = (char*)FunctionConfig->GetChStr( "Config" );
        Config = Application->Config->GetChild( ConfigName, true );
    }
    if (Config->isNull()) Config->SetObject();

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

bool  CFunctionCore::InitChannelLinks( CDataMember * LinkConfig )
{
    TChannel        * Channel;
    CDataMember     * ChannelMember;
    CDataMember     * FunctionMember;

    // Validate
    if (!LinkConfig)
        return false;

    // Process each Channel
    ChannelMember = LinkConfig->GetFirstChild();
    while (ChannelMember)
    {
        if ((Channel = GetChannel( ChannelMember->GetName() )))
        {
            FunctionMember = ChannelMember->GetElement( 0 );
            while (FunctionMember)
            {
                // Get Parameters
                LinkChannel( Channel->Name,
                                   FunctionMember->GetChStr( "Function" ),
                                   FunctionMember->GetChStr( "Channel" ),
                                   FunctionMember->GetChBool( "Bidirectional" ) );
                FunctionMember = FunctionMember->GetNextPeer();
            }
        }
        ChannelMember = ChannelMember->GetNextPeer();
    }

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

bool  CFunctionCore::SetLogParam( EDebugLevel pDebugLevel, int pOutputDisplay )
{
    // Output
    LogLevel    = pDebugLevel;
    LogOutput   = pOutputDisplay;

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

bool  CFunctionCore::SetLogLevel( EDebugLevel pDebugLevel )
{
    LogLevel    = pDebugLevel;
    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 = new TChannel;

        // Set Name
        (*Channel)->Name = strdup( ChannelName );
        sprintf( (*Channel)->Ref, "%s/%s", Name, ChannelName );

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

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

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

// Automated Data Input/Output
bool CFunctionCore::LinkChannel( const char * ChannelName, const char * LinkFunctionName, const char * LinkChannelName, bool Bidirectional )
{
    TChannel        * OutChannel        = NULL;
    CFunctionCore   * InFunction        = NULL;
    TChannel        * InChannel         = NULL;
    TChannelLink    ** LinkedChannel    = NULL;

    // Check if Channels & Function exist
    if (!(OutChannel = GetChannel( ChannelName )) ||
        !(InFunction = Application->GetFunction( LinkFunctionName )) ||
        !(InChannel = InFunction->GetChannel( LinkChannelName )) ) {
        return false;
    }

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

    // Create if not found
    if (!*LinkedChannel)
    {
        // Create
        *LinkedChannel = new TChannelLink;

        // Set Parameters
        (*LinkedChannel)->Function = InFunction;
        (*LinkedChannel)->Name     = strdup( LinkChannelName );
        sprintf( (*LinkedChannel)->Ref, "%s/%s", LinkFunctionName, LinkChannelName );

        // Log Event
        if (Log)  Log->Message( LogLevel, dlLow, "%s/%s: Output Linked - '%s/%s' --> '%s/%s'",
                                ProcessName, Name, Name, ChannelName, LinkFunctionName, LinkChannelName );
    }

    // Link return direction as well
    if (Bidirectional) {
        return InFunction->LinkChannel( LinkChannelName, Name, ChannelName, false );
    }

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

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

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

    // Get Channel
    if (!(Channel = GetChannel( ChannelName ))) {
        // Channel not found
        if (Log)  Log->Message( LogLevel, dlHigh, "%s/%s: Channel '%s'->'%s' - Input rejected, Channel not found",
                                ProcessName, Name, ((SourceRef && *SourceRef)? SourceRef : "(Any)"), ChannelName );
        return 0;
    }
    else if (!Channel->InputEnabled) {
        // Channel disabled
        if (Log)  Log->Message( LogLevel, dlHigh, "%s/%s: Channel '%s'-'%s' - Input rejected, Channel input disabled",
                                ProcessName, Name, ((SourceRef && *SourceRef)? SourceRef : "(Any)"), ChannelName );
        return 0;
    }

    // Return processed bytes
    if (Len == -1) {
        Len = strlen( Data );
    }
    if (Log)  Log->Output( LogLevel, dlHigh, LogOutput, Data, Len, "%s/%s: Channel '%s'->'%s' - IN:",
                           ProcessName, Name, ((SourceRef && *SourceRef)? SourceRef : "(Any)"), ChannelName );
    return Len;

}
//---------------------------------------------------------------------------

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

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

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

int CFunctionCore::Output( const TChannel * Channel, const char * TargetRef, const bool SourceRef, const char * Data, int Len, int OutputFormat )
{
    TChannelLink    * OutChannel    = NULL;
    int             TempLen         = 0;
    int             OutLen          = 0;

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

    // Check if enabled
    if (!Channel->OutputEnabled) {
        if (Log)  Log->Message( LogLevel, dlHigh, "%s/%s: Channel '%s' - Output rejected, Channel output disabled",
                                ProcessName, Name, Channel->Name, ((TargetRef && *TargetRef)? TargetRef : "(All)") );
        return 0;
    }

    // Log event
    if (Log)  Log->Output( LogLevel, dlHigh, ((!OutputFormat)? LogOutput : OutputFormat), Data, Len, "%s/%s: Channel '%s' - OUT:",
                           ProcessName, Name, Channel->Name, ((TargetRef && *TargetRef)? TargetRef : "(All)") );

    // Pass output to all linked inputs
    if (Len == -1)
        Len = strlen( Data );
    OutChannel = Channel->FirstLink;
    while (OutChannel) {
        if (!TargetRef || !*TargetRef || !strcasecmp( TargetRef, OutChannel->Ref )) {
            TempLen = OutChannel->Function->Input( OutChannel->Name, ((SourceRef)? Channel->Ref : NULL), Data, Len );
            OutLen = (TempLen > OutLen)? TempLen : OutLen;
        }
        OutChannel = OutChannel->Next;
    }

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