/**
 * *******************************************************************************
 * Copyright (c) 2020 Robert Bosch GmbH.
 * 
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 * 
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     Robert Bosch GmbH - initial API and implementation
 * *******************************************************************************
 */

package org.eclipse.app4mc.slg.commons.m2t.transformers.sw

import com.google.inject.Inject
import com.google.inject.Singleton
import java.util.LinkedHashSet
import org.eclipse.app4mc.amalthea.model.Component
import org.eclipse.app4mc.amalthea.model.Group
import org.eclipse.app4mc.slg.commons.m2t.generators.TranslationUnit
import org.eclipse.app4mc.transformation.util.OutputBuffer

@Singleton
class GroupHeaderTransformer extends ActivityGraphItemTransformer {

	@Inject OutputBuffer outputBuffer
	@Inject ActivityGraphItemTransformer psCallGraphItemTransformer

	static def getModuleName(Group group) {
		return "groups"
	}

	static def getFunctionDef(Group group) {
		return "group_" + group.name + "()"
	}

	def create new TranslationUnit()
		transform(Group group, Component component) {

		it.path = GroupHeaderTransformer.getModuleName(group)
		it.call = GroupHeaderTransformer.getFunctionDef(group)

		val groupItemIncludes = new LinkedHashSet<String>
		val groupItemCalls = new LinkedHashSet<String>
		group?.items.forEach [ item |
			val tmp = psCallGraphItemTransformer.transform(item)
			if (!tmp.extendedIncPath.isNullOrEmpty && !(it.extendedIncPath.equals(tmp.extendedIncPath)))
				groupItemIncludes.add(tmp.extendedIncPath)
			if (!tmp.call.isNullOrEmpty)
				groupItemCalls.add(tmp.call)
		]

		// remove file extension
		val index = it.extendedIncPath.lastIndexOf('.')
		val trimmedIncPath = it.extendedIncPath.substring(0, index)

		outputBuffer.appendTo("INC", trimmedIncPath, "\n//Group " + group.name + "----\n")
		groupItemIncludes.forEach [ include |
			outputBuffer.appendTo("INC", trimmedIncPath, "#include \"" + include + ".h\"\n")
		]
		outputBuffer.appendTo("INC", trimmedIncPath, "void " + it.call + ";\n")
	}

}