///////////////////////////////////////////////////////////////////////////////
//                                                                           //
// Copyright (c) 2000-2019 Ericsson Telecom AB                               //
//                                                                           //
// All rights reserved. This program and the accompanying materials          //
// are made available under the terms of the Eclipse Public License v2.0     //
// which accompanies this distribution, and is available at                  //
// https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.html                                 //
///////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////
//  Module: EPTF_CLL_NameService_Functions
// 
//  Purpose:
//    This module contains the implementation of the EPTF_NameService functions.
// 
//  Module depends on:
//    <EPTF_CLL_Base_Functions>
//    <EPTF_CLL_NameService_Definitions>
//    <EPTF_CLL_Logging_Definitions>
//    <EPTF_CLL_Logging_Functions>
// 
//  Module Parameters:
//    tsp_debug_EPTF_NameService_Functions - boolean
//
//  Current Owner:
//    Jozsef Gyurusi (ETHJGI)
// 
//  Last Review Date:
//    2008-05-20
//
//  Detailed Comments:
//    This module contains the interface functions for the EPTF_NameService. 
//
///////////////////////////////////////////////////////////////

module EPTF_CLL_NameService_Functions {

import from EPTF_CLL_NameService_Definitions all;
import from EPTF_CLL_Base_Functions all;
import from EPTF_CLL_Logging_Definitions all;
import from EPTF_CLL_Logging_Functions all;

modulepar boolean tsp_debug_EPTF_NameService_Functions := false;

// INIT

///////////////////////////////////////////////////////////
//  Function: f_EPTF_NS_init_CT
// 
//  Purpose:
//    Initialises the EPTF_NS_CT component
//
//  Parameters:
//    pl_selfName - *in* *charstring*  - name of the component
//
//  Return Value:
//    -
//
//  Errors:
//    -
//
//  Detailed Comments:
//    This function should be called before using the EPTF NS
//    component.
//
///////////////////////////////////////////////////////////
public function f_EPTF_NS_init_CT(in charstring pl_selfName) runs on EPTF_NS_CT {
  if (v_NS_initialized) {
    return;
  }
  f_EPTF_Logging_init_CT(pl_selfName);
  v_NameService_loggingMaskId := f_EPTF_Logging_registerComponentMasks(tsp_EPTF_NameService_loggingComponentMask, c_EPTF_NameService_loggingEventClasses, EPTF_Logging_CLL);
  if(tsp_debug_EPTF_NameService_Functions) {
    f_EPTF_Logging_enableLocalMask(v_NameService_loggingMaskId, c_EPTF_NameService_loggingClassIdx_Debug);
  } else {
    f_EPTF_Logging_disableLocalMask(v_NameService_loggingMaskId, c_EPTF_NameService_loggingClassIdx_Debug);
  }

  
  v_EPTF_NS_RegisteredItems := {};
  v_EPTF_NS_def := activate(as_handle_main_EPTF_NS_MgmtIf());
  v_NS_initialized := true;

  f_EPTF_Base_registerCleanup(refers(f_EPTF_NS_cleanup_CT));

  //log("----NS INIT DONE----");
  f_EPTF_NameService_debug("---- EPTF_NS INIT "&pl_selfName&" DONE----");
  
}

// MAIN

///////////////////////////////////////////////////////////
//  Function: f_EPTF_NS_main_CT
// 
//  Purpose:
//    Behaviour function for the EPTF_NS_CT component
//
//  Parameters:
//    pl_selfName - *in* *charstring*  - name of the component
//
//  Return Value:
//    -
//
//  Errors:
//    -
//
//  Detailed Comments:
//    This function can be started on the EPTF_NS_CT component as a behaviour function.
//
///////////////////////////////////////////////////////////
public function f_EPTF_NS_main_CT(in charstring pl_selfName) runs on EPTF_NS_CT {
  f_EPTF_NS_init_CT(pl_selfName);
  //var default v_def := activate(as_handle_main_EPTF_NS_MgmtIf());
  alt {
    [] as_handle_main_EPTF_NS_MgmtIf();
  }
  f_EPTF_Base_cleanup_CT();
}


//*************************************************************
//  private
//*************************************************************

// LOGGING

// log everything in EPTF_Var_CT
private function f_EPTF_NS_CT_LogAll(in charstring pl_msg) runs on EPTF_NS_CT {

  if (pl_msg!="") //{log(pl_msg)};
  {f_EPTF_NameService_debug(pl_msg);}

  //log("EPTF_NS_CT.v_EPTF_NS_RegisteredItems: ", v_EPTF_NS_RegisteredItems);
  f_EPTF_NameService_debug(log2str("EPTF_NS_CT.v_EPTF_NS_RegisteredItems: ",v_EPTF_NS_RegisteredItems));
  
  if (pl_msg!="") //{log(pl_msg)};
  {f_EPTF_NameService_debug(pl_msg);}
}

// log a given EPTF_NS_RegisteredItem
private function f_EPTF_NS_Log(in charstring pl_msg, in integer pl_idx) runs on EPTF_NS_CT {

  if (pl_msg!="") //{log(pl_msg)};
  {f_EPTF_NameService_debug(pl_msg);}
  
  //log("EPTF_NS_CT.v_EPTF_NS_RegisteredItems[",pl_idx,"]: ", v_EPTF_NS_RegisteredItems[pl_idx]);
  f_EPTF_NameService_debug(log2str("EPTF_NS_CT.v_EPTF_NS_RegisteredItems[",pl_idx,"]: ", v_EPTF_NS_RegisteredItems[pl_idx]));
  
  if (pl_msg!="") //{log(pl_msg)};
  {f_EPTF_NameService_debug(pl_msg);}
}

// SEND FUNCTION

private function f_EPTF_NS_send(in EPTF_NS_MgmtMsg pl_EPTF_NS_MgmtMsg, in EPTF_NS_Client_CT pl_remoteCompRef) runs on EPTF_NS_CT {
  EPTF_NS_MgmtIf.send(pl_EPTF_NS_MgmtMsg) to pl_remoteCompRef;
}

private function f_EPTF_NS_cleanup_CT() runs on EPTF_NS_CT {
  if (v_NS_initialized == false) {
    return;
  }
  v_NS_initialized := false;
  //log("----NS CLEANUP DONE----");
  f_EPTF_NameService_debug("----NS CLEANUP DONE----");
}

// REGISTER

// removes all registered entry made by the given component
private function f_EPTF_NS_RemoveAllByOwner(in EPTF_NS_Client_CT pl_owner) runs on EPTF_NS_CT {
  var EPTF_NS_RegisteredItems vl_newRegisteredItems := {};
  for(var integer i:=0; i<sizeof(v_EPTF_NS_RegisteredItems); i:=i+1) {
    if (v_EPTF_NS_RegisteredItems[i].ownerComp != pl_owner) {
      vl_newRegisteredItems[sizeof(vl_newRegisteredItems)] := v_EPTF_NS_RegisteredItems[i];
    }
  }
  v_EPTF_NS_RegisteredItems := vl_newRegisteredItems;
}

// searches the database for the name and returns its index in pl_idx
// returns -1 if not found
private function f_EPTF_NS_QueryName(in charstring pl_name, out integer pl_idx) runs on EPTF_NS_CT {
  pl_idx := -1;
  for(var integer i:=0; i<sizeof(v_EPTF_NS_RegisteredItems); i:=i+1) {
    if (v_EPTF_NS_RegisteredItems[i].name == pl_name) {
      pl_idx := i;
      return;
    }
  }
}

// HANDLER FUNCTIONS

private function f_EPTF_NS_handle_RegisterName(in EPTF_NS_RegisterName pl_registerName, in EPTF_NS_Client_CT pl_EPTF_NS_MgmtIf_msg_sender) runs on EPTF_NS_CT {
  var integer vl_idx;
  f_EPTF_NS_QueryName(pl_registerName.name,vl_idx);
  if (vl_idx!=-1) {
    // name already registered

    //log("WARNING:","The name already registered in msg: ", pl_registerName,
    //  " Original item is at ",vl_idx," : ",v_EPTF_NS_RegisteredItems[vl_idx]);
    f_EPTF_NameService_warning(log2str( "The name already registered in msg: ", pl_registerName," Original item is at ",vl_idx," : ",v_EPTF_NS_RegisteredItems[vl_idx]));
    
    f_EPTF_NS_send({registerNAck:=pl_registerName},pl_EPTF_NS_MgmtIf_msg_sender);
    return;
  }
  v_EPTF_NS_RegisteredItems[sizeof(v_EPTF_NS_RegisteredItems)] := {
    name := pl_registerName.name,
    ownerComp := pl_EPTF_NS_MgmtIf_msg_sender,
    id := pl_registerName.id
  }
  f_EPTF_NS_CT_LogAll("---------REGISTER NAME RECEIVED-----------");
}

private function f_EPTF_NS_handle_DeregisterName(in EPTF_NS_DeregisterName pl_deregisterName, in EPTF_NS_Client_CT pl_EPTF_NS_MgmtIf_msg_sender) runs on EPTF_NS_CT {
  var integer vl_idx;
  f_EPTF_NS_QueryName(pl_deregisterName.name,vl_idx);
  if (vl_idx==-1) {
    // name is not registered
    //log("WARNING:","The name is not registered in msg: ", pl_deregisterName);
    f_EPTF_NameService_warning(log2str("The name is not registered in msg: ", pl_deregisterName));
    return;
  }
  var EPTF_NS_RegisteredItems vl_newRegisteredItems := {};
  for(var integer i:=0; i<sizeof(v_EPTF_NS_RegisteredItems); i:=i+1) {
    if (i != vl_idx) {
      vl_newRegisteredItems[sizeof(vl_newRegisteredItems)] := v_EPTF_NS_RegisteredItems[i];
    }
  }
  v_EPTF_NS_RegisteredItems := vl_newRegisteredItems;
  f_EPTF_NS_CT_LogAll("---------DEREGISTER NAME RECEIVED-----------");
}

private function f_EPTF_NS_handle_Query(in EPTF_NS_Query pl_queryName, in EPTF_NS_Client_CT pl_EPTF_NS_MgmtIf_msg_sender) runs on EPTF_NS_CT {
  var integer vl_idx;
  f_EPTF_NS_QueryName(pl_queryName.name,vl_idx);
  if (vl_idx==-1) {
    // name is not registered
    //log("WARNING:","The name is not registered in msg: ", pl_queryName);
    f_EPTF_NameService_warning(log2str("The name is not registered in msg: ", pl_queryName));

    
    f_EPTF_NS_send({queryResp:={ pl_queryName.name, omit,omit}},pl_EPTF_NS_MgmtIf_msg_sender);
    return;
  }
  f_EPTF_NS_send({queryResp:= {
    name := v_EPTF_NS_RegisteredItems[vl_idx].name,
    ownerComp := v_EPTF_NS_RegisteredItems[vl_idx].ownerComp,
    id := v_EPTF_NS_RegisteredItems[vl_idx].id
   }},pl_EPTF_NS_MgmtIf_msg_sender);
  f_EPTF_NS_CT_LogAll("---------QUERY NAME RECEIVED-----------");
}

private function f_EPTF_NS_handle_Bye(in EPTF_NS_Client_CT pl_EPTF_NS_MgmtIf_msg_sender) runs on EPTF_NS_CT {
  f_EPTF_NS_RemoveAllByOwner(pl_EPTF_NS_MgmtIf_msg_sender);
  f_EPTF_NS_send({byeAck:={}},pl_EPTF_NS_MgmtIf_msg_sender);
  f_EPTF_NS_CT_LogAll("---------BYE RECEIVED-----------");
}

// the main handler function of the EPTF_NS_MgmtIf.
// returns true if the repeat, false to exit from the main altsep
function f_handle_main_EPTF_NS_MgmtIf(
  in EPTF_NS_MgmtMsg vl_EPTF_NS_MgmtIf_msg,
  in EPTF_NS_Client_CT vl_EPTF_NS_MgmtIf_msg_sender) runs on EPTF_NS_CT return boolean {
  if (ischosen(vl_EPTF_NS_MgmtIf_msg.registerName)) {
    f_EPTF_NS_handle_RegisterName(vl_EPTF_NS_MgmtIf_msg.registerName, vl_EPTF_NS_MgmtIf_msg_sender);
    return true;
  }
  if (ischosen(vl_EPTF_NS_MgmtIf_msg.deregisterName)) {
    f_EPTF_NS_handle_DeregisterName(vl_EPTF_NS_MgmtIf_msg.deregisterName, vl_EPTF_NS_MgmtIf_msg_sender);
    return true;
  }
  if (ischosen(vl_EPTF_NS_MgmtIf_msg.query)) {
    f_EPTF_NS_handle_Query(vl_EPTF_NS_MgmtIf_msg.query, vl_EPTF_NS_MgmtIf_msg_sender);
    return true;
  }
  if (ischosen(vl_EPTF_NS_MgmtIf_msg.bye)) {
    f_EPTF_NS_handle_Bye(vl_EPTF_NS_MgmtIf_msg_sender);
    return true;
  }
  //log("ERROR:","Unexpected message received from ",vl_EPTF_NS_MgmtIf_msg_sender,": ",vl_EPTF_NS_MgmtIf_msg);
  f_EPTF_NameService_warning(log2str("Unexpected message received from ",vl_EPTF_NS_MgmtIf_msg_sender,": ",vl_EPTF_NS_MgmtIf_msg));

  return false;
}


// MAIN ALTSTEP
private altstep as_handle_main_EPTF_NS_MgmtIf() runs on EPTF_NS_CT {
  var EPTF_NS_MgmtMsg vl_EPTF_NS_MgmtIf_msg;
  var EPTF_NS_Client_CT vl_EPTF_NS_MgmtIf_msg_sender;
  [] EPTF_NS_MgmtIf.receive(?) -> value vl_EPTF_NS_MgmtIf_msg sender vl_EPTF_NS_MgmtIf_msg_sender {
    if (f_handle_main_EPTF_NS_MgmtIf(vl_EPTF_NS_MgmtIf_msg,vl_EPTF_NS_MgmtIf_msg_sender)) {repeat;}
  }
}

///////////////////////////////////////////////////////////
// Group: Private
//
// Purpose:
//   Private functions. These functions must not be called by the user of <EPTF_NameService_CT>
//
// Elements:
///////////////////////////////////////////////////////////

group Private {
group Logging {

  ///////////////////////////////////////////////////////////
  //  Function: f_EPTF_NameService_error
  // 
  //  Purpose:
  //    Function to log an error from NameService feature.
  //
  //  Parameters:
  //    - pl_message - *in* *charstring* - the message to log
  //
  //  Return Value:
  //    -
  //
  //  Errors & assertions:
  //    - 
  //
  //  Detailed Comments:
  //    -
  //
  ///////////////////////////////////////////////////////////
  private function f_EPTF_NameService_error(in charstring pl_message)
  runs on EPTF_NS_CT
  {
    f_EPTF_Logging_error(true, tsp_EPTF_NameService_loggingComponentMask&": "&pl_message);
    f_EPTF_Base_stopAll();
  }
  
  ///////////////////////////////////////////////////////////
  //  Function: f_EPTF_NameService_warning
  // 
  //  Purpose:
  //    Function to log a warning from NameService feature.
  //
  //  Parameters:
  //    - pl_message - *in* *charstring* - the message to log
  //
  //  Return Value:
  //    -
  //
  //  Errors & assertions:
  //    - 
  //
  //  Detailed Comments:
  //    -
  //
  ///////////////////////////////////////////////////////////
  private function f_EPTF_NameService_warning(in @lazy charstring pl_message)
  runs on EPTF_NS_CT
  {
    f_EPTF_Logging_warningV2(pl_message, v_NameService_loggingMaskId, {c_EPTF_NameService_loggingClassIdx_Warning});
  }
  
  ///////////////////////////////////////////////////////////
  //  Function: f_EPTF_NameService_debug
  // 
  //  Purpose:
  //    Function to log a debug message from NameService feature.
  //
  //  Parameters:
  //    - pl_message - *in* *charstring* - the message to log
  //
  //  Return Value:
  //    -
  //
  //  Errors & assertions:
  //    - 
  //
  //  Detailed Comments:
  //    -
  //
  ///////////////////////////////////////////////////////////
  private function f_EPTF_NameService_debug(in @lazy charstring pl_message)
  runs on EPTF_NS_CT
  {
    f_EPTF_Logging_debugV2(pl_message, v_NameService_loggingMaskId, {c_EPTF_NameService_loggingClassIdx_Debug});
  }
  
  ///////////////////////////////////////////////////////////
  //  Function: f_EPTF_NameService_debugEnabled
  // 
  //  Purpose:
  //    Function to check if debug is enabled for NameService
  //
  //  Parameters:
  //    -
  //
  //  Return Value:
  //    *boolean* - true if debug enalbed
  //
  //  Errors & assertions:
  //    - 
  //
  //  Detailed Comments:
  //    -
  //
  ///////////////////////////////////////////////////////////
  private function f_EPTF_NameService_debugEnabled()
  runs on EPTF_NS_CT
  return boolean
  {
    return f_EPTF_Logging_isEnabled(v_NameService_loggingMaskId, c_EPTF_NameService_loggingClassIdx_Debug);
  }
} // group Logging

} // group Private

} // end of module