/**
 * 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.generators;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.function.Consumer;

import org.eclipse.app4mc.amalthea.model.ActivityGraph;
import org.eclipse.app4mc.amalthea.model.ActivityGraphItem;
import org.eclipse.app4mc.slg.commons.m2t.transformers.sw.ActivityGraphItemTransformer;
import org.eclipse.app4mc.transformation.util.OutputBuffer;
import org.eclipse.emf.common.util.EList;
import org.eclipse.xtend2.lib.StringConcatenation;
import org.eclipse.xtext.xbase.lib.StringExtensions;

public class RunnableTranslationUnit extends TranslationUnit {
	public static String getModulePathStatic() {
		return "synthetic_gen" + "/" + getModuleNameStatic();
	}

	public static String getMakeFilePathStatic() {
		return getModulePathStatic() + "/" + "CMakeLists.txt";
	}

	public static String getModuleNameStatic() {
		return "runnables";
	}

	public static String getLibName() {
		return "RUNNABLES_LIB";
	}

	public String getModuleName() {
		return RunnableTranslationUnit.getModuleNameStatic();
	}

	@Override
	public String getCall() {
		StringConcatenation builder = new StringConcatenation();
		builder.append("run_");
		builder.append(this.runnable.getName());
		builder.append("()");
		return builder.toString();
	}

	@Override
	public String getIncFile() {
		return getModuleName() + ".h";
	}

	public ActivityGraphItemTransformer callGraphItemTransformer;

	public org.eclipse.app4mc.amalthea.model.Runnable runnable;

	private OutputBuffer outputBuffer;

	public RunnableTranslationUnit(final OutputBuffer outputBuffer,
			final ActivityGraphItemTransformer callGraphItemTransformer,
			final org.eclipse.app4mc.amalthea.model.Runnable runnable) {
		super();
		this.callGraphItemTransformer = callGraphItemTransformer;
		this.runnable = runnable;
		this.outputBuffer = outputBuffer;

		this.genFiles();
	}

	public void genFiles() {
		if (isSrcFileEmpty()) {
			srcAppend("#include \"" + getIncFile() + "\"\n");
		}
		final LinkedHashSet<String> includes = new LinkedHashSet<>();
		final ArrayList<String> calls = new ArrayList<>();
		ActivityGraph _activityGraph = null;
		if (this.runnable != null) {
			_activityGraph = this.runnable.getActivityGraph();
		}
		EList<ActivityGraphItem> _items = null;
		if (_activityGraph != null) {
			_items = _activityGraph.getItems();
		}
		final Consumer<ActivityGraphItem> _function = new Consumer<ActivityGraphItem>() {
			@Override
			public void accept(final ActivityGraphItem item) {
				final TranslationUnit tmp = RunnableTranslationUnit.this.callGraphItemTransformer.transform(item);
				if (((!StringExtensions.isNullOrEmpty(tmp.getIncFile()))
						&& (!RunnableTranslationUnit.this.getIncFile().equals(tmp.getIncFile())))) {
					includes.add(tmp.getIncFile());
				}
				final String call = tmp.getCall();
				if (!StringExtensions.isNullOrEmpty(call)) {
					calls.add(call);
				}
			}
		};
		_items.forEach(_function);

		incAppend("\n//Runnable " + runnable.getName() + "----\n");
		toH(includes);

		srcAppend("\n//Runnable " + runnable.getName() + "----\n");
		toCpp(includes, calls);
	}

	public void toH(final HashSet<String> includes) {
		final Consumer<String> _function = new Consumer<String>() {
			@Override
			public void accept(final String include) {
				RunnableTranslationUnit.this.incAppend((("#include \"" + include) + "\"\n"));
			}
		};
		includes.forEach(_function);
		StringConcatenation builder = new StringConcatenation();
		builder.append("void ");
		builder.append(this.getCall());
		builder.append(";");
		builder.newLineIfNotEmpty();
		this.incAppend(builder.toString());
	}

	public void toCpp(final HashSet<String> includes, final List<String> calls) {
		srcAppend("void " + getCall() + "{\n");

		final Consumer<String> _function = new Consumer<String>() {
			@Override
			public void accept(final String call) {
				RunnableTranslationUnit.this.srcAppend((("\t" + call) + ";\n"));
			}
		};
		calls.forEach(_function);

		srcAppend("}\n\n");
	}

	public String getBasePath() {
		return "synthetic_gen";
	}

	public String getModulePath() {
		return getBasePath() + "/" + getModuleName();
	}

	@Override
	public String getSrcFile() {
		return getModuleName() + ".cpp";
	}

	public String getIncPath() {
		return getModulePath() + "/_inc/" + getIncFile();
	}

	public String getSrcPath() {
		return getModulePath() + "/_src/" + getSrcFile();
	}

	public boolean isIncFileEmpty() {
		return !outputBuffer.bufferExists("INC", getModulePath() + "/_inc/" + getModuleName());
	}

	public boolean isSrcFileEmpty() {
		return !outputBuffer.bufferExists("SRC", getModulePath() + "/_src/" + getModuleName());
	}

	public void incAppend(final String str) {
		outputBuffer.appendTo("INC", getModulePath() + "/_inc/" + getModuleName(), str);
	}

	public void srcAppend(final String str) {
		outputBuffer.appendTo("SRC", getModulePath() + "/_src/" + getModuleName(), str);
	}
}