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/*******************************************************************************
 * Copyright (c) 2011 protos software gmbh (http://www.protos.de).
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * CONTRIBUTORS:
 * 		Henrik Rentz-Reichert (initial contribution)
 * 
 *******************************************************************************/

package org.eclipse.etrice.generator.java.gen

import com.google.inject.Inject
import com.google.inject.Singleton
import org.eclipse.etrice.core.room.Message
import org.eclipse.etrice.core.room.ProtocolClass
import org.eclipse.etrice.core.room.PrimitiveType
import org.eclipse.etrice.core.room.DataClass
import org.eclipse.etrice.generator.base.ILogger
import org.eclipse.etrice.generator.etricegen.Root
import org.eclipse.xtext.generator.JavaIoFileSystemAccess

import org.eclipse.etrice.generator.extensions.RoomExtensions
import org.eclipse.etrice.generator.generic.ProcedureHelpers
import org.eclipse.etrice.generator.generic.TypeHelpers
import org.eclipse.etrice.generator.generic.GenericProtocolClassGenerator


@Singleton
class ProtocolClassGen extends GenericProtocolClassGenerator {

	@Inject extension JavaIoFileSystemAccess fileAccess
	@Inject extension JavaExtensions stdExt
	@Inject extension RoomExtensions roomExt
	@Inject extension ProcedureHelpers helpers
	@Inject extension TypeHelpers
	@Inject ILogger logger
	
	def doGenerate(Root root) {
		for (pc: root.usedProtocolClasses) {
			var path = pc.generationTargetPath+pc.getPath
			var file = pc.getJavaFileName
			logger.logInfo("generating ProtocolClass implementation '"+file+"' in '"+path+"'")
			fileAccess.setOutputPath(path)
			fileAccess.generateFile(file, root.generate(pc))
		}
	}
	
	def generate(Root root, ProtocolClass pc) {'''
		package pc.getPackage();
		
		import java.util.ArrayList;
		
		import org.eclipse.etrice.runtime.java.messaging.Address;
		import org.eclipse.etrice.runtime.java.messaging.Message;
		import org.eclipse.etrice.runtime.java.modelbase.*;
		import org.eclipse.etrice.runtime.java.debugging.DebuggingService;
		
		helpers.userCode(pc.userCode1)
		
		var models = root.getReferencedModels(pc)
		FOR model : modelsimport model.name.*;
		ENDFOR
		
		public class pc.name {
			// message IDs
			genMessageIDs(pc)
		
			helpers.userCode(pc.userCode2)
		
			private static String messageStrings[] = {"MIN", FOR m : pc.getAllOutgoingMessages()"m.name",ENDFOR FOR m : pc.getAllIncomingMessages()"m.name",ENDFOR"MAX"};
		
			public String getMessageString(int msg_id) {
				if (msg_id<MSG_MIN || msg_id>MSG_MAX+1){
					// id out of range
					return "Message ID out of range";
				}
				else{
					return messageStrings[msg_id];
				}
			}
		
			portClass(pc, false)
			portClass(pc, true)
		}
	'''
	}
	
	def portClass(ProtocolClass pc, Boolean conj) {
		var pclass = pc.getPortClass(conj)
		var portClassName = pc.getPortClassName(conj)
		var replPortClassName = pc.getPortClassName(conj, true)
	'''
		
		// port class
		static public class portClassName extends PortBase {
			IF pclass!=null
				helpers.userCode(pclass.userCode)
			ENDIF
			// constructors
			public portClassName(IEventReceiver actor, String name, int localId, Address addr, Address peerAddress) {
				super(actor, name, localId, 0, addr, peerAddress);
				DebuggingService.getInstance().addPortInstance(this);
			}
			public portClassName(IEventReceiver actor, String name, int localId, int idx, Address addr, Address peerAddress) {
				super(actor, name, localId, idx, addr, peerAddress);
				DebuggingService.getInstance().addPortInstance(this);
			}
		
			@Override
			public void receive(Message m) {
					if (!(m instanceof EventMessage))
						return;
					EventMessage msg = (EventMessage) m;
					if (msg.getEvtId() <= 0 || msg.getEvtId() >= MSG_MAX)
						System.out.println("unknown");
					else {
						if (messageStrings[msg.getEvtId()] != "timerTick"){
							TODOTS: model switch for activation
							DebuggingService.getInstance().addMessageAsyncIn(getPeerAddress(), getAddress(), messageStrings[msg.getEvtId()]);
						}
						IF pc.handlesReceive(conj)
						switch (msg.getEvtId()) {
							FOR hdlr : pc.getReceiveHandlers(conj)
								case hdlr.msg.getCodeName():
								{
									FOR command : hdlr.detailCode.commands
										command
									ENDFOR
								}
								break;
							ENDFOR
							default:
						ENDIF
							if (msg instanceof EventWithDataMessage)
								getActor().receiveEvent(this, msg.getEvtId(), ((EventWithDataMessage)msg).getData());
							else
								getActor().receiveEvent(this, msg.getEvtId(), null);
						IF pc.handlesReceive(conj)
						}
						ENDIF
					}
			}
		
			IF pclass!=null
				helpers.attributes(pclass.attributes)
				helpers.operationsImplementation(pclass.operations, portClassName)
			ENDIF
			
			// sent messages
			FOR m : pc.getOutgoing(conj)
				sendMessage(m, conj)
			ENDFOR
		}
		
		// replicated port class
		static public class replPortClassName {
			private ArrayList<portClassName> ports;
			private int replication;
		
			public replPortClassName(IEventReceiver actor, String name, int localId, Address[] addr,
					Address[] peerAddress) {
				replication = addr.length;
				ports = new ArrayList<pc.name.portClassName>(replication);
				for (int i=0; i<replication; ++i) {
					ports.add(new portClassName(
							actor, name+i, localId, i, addr[i], peerAddress[i]));
				}
			}
			
			public int getReplication() {
				return replication;
			}
			
			public int getIndexOf(InterfaceItemBase ifitem){
					return ifitem.getIdx();
				}
			
			public portClassName get(int i) {
				return ports.get(i);
			}
			
			IF conj
			// incoming messages
			FOR m : pc.getAllIncomingMessages()
			messageSignature(m){
				for (int i=0; i<replication; ++i) {
					ports.get(i).messageCall(m);
				}
			}
			ENDFOR
			ELSE
			// outgoing messages
			FOR m : pc.getAllOutgoingMessages()
			messageSignature(m){
				for (int i=0; i<replication; ++i) {
					ports.get(i).messageCall(m);
				}
			}
			ENDFOR
			ENDIF
		}
		
		// interface for port class
		public interface Iname{
			IF conj
			// outgoing messages
			FOR m : pc.getAllOutgoingMessages() messageSignature(m);
			ENDFOR
			ELSE
			// incoming messages
			FOR m : pc.getAllIncomingMessages() messageSignature(m);
			ENDFOR
			ENDIF
		}
	'''
	}

	def messageSignature(Message m) {
		'''IF m.privprivateELSEpublicENDIF void m.name(IF m.data!=nullm.data.refType.type.typeName m.data.nameENDIF)'''
	}

	def messageSignatureExplicit(Message m) {
		var dc = (m.data.refType.type as DataClass)
		'''public void m.name(IF dc.base!=nulldc.base.typeName _super, ENDIFFOR a : dc.attributes SEPARATOR ", "a.refType.type.typeNameIF a.size>1[]ENDIF a.nameENDFOR)'''
	}

	def messageCall(Message m) {
		'''m.name(IF m.data!=null m.data.nameENDIF)'''
	}
	
	def sendMessage(Message m, boolean conj) {
		var dir = if (conj) "IN" else "OUT"
		var hdlr = m.getSendHandler(conj)
		'''
			messageSignature(m) {
				IF hdlr!=null
					FOR command : hdlr.detailCode.commands	command
					ENDFOR
				ELSE
					if (messageStrings[ dir_m.name] != "timerTick"){
						TODOTS: model switch for activation
					DebuggingService.getInstance().addMessageAsyncOut(getAddress(), getPeerAddress(), messageStrings[dir_m.name]);
					}
					if (getPeerAddress()!=null)
						IF m.data==nullgetPeerMsgReceiver().receive(new EventMessage(getPeerAddress(), dir_m.name));
						ELSEgetPeerMsgReceiver().receive(new EventWithDataMessage(getPeerAddress(), dir_m.name, m.data.nameIF (!m.data.refType.ref && !(m.data.refType.type instanceof PrimitiveType)).deepCopy()ENDIF));
					ENDIF
				ENDIF
			}
			IF m.data!=null && m.data.refType.type instanceof DataClass
				messageSignatureExplicit(m) {
					m.name(new m.data.refType.type.name(IF (m.data.refType.type as DataClass).base!=null_super, ENDIFFOR a : (m.data.refType.type as DataClass).attributes SEPARATOR ", "a.nameENDFOR));
				}
			ENDIF
		'''
	}
}

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