/*=============================================================================#
 # Copyright (c) 2008, 2017 Stephan Wahlbrink and others.
 # 
 # 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, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.r.core.rsource.ast;

import org.junit.Assert;
import org.junit.Test;

import org.eclipse.statet.ecommons.text.core.input.StringParserInput;

import org.eclipse.statet.ltk.model.core.IModelManager;
import org.eclipse.statet.r.core.model.ArgsDefinition;
import org.eclipse.statet.r.core.rsource.ast.FCall.Args;
import org.eclipse.statet.r.core.rsource.ast.RAst.FCallArgMatch;


public class RArgumentMatchingTest {
	
	
	private final RScanner scanner= new RScanner(IModelManager.MODEL_FILE);
	
	private final StringParserInput input= new StringParserInput();
	
	
	@Test
	public void simple() {
		final ArgsDefinition argsDef = new ArgsDefinition("test1", "test2");
		
		assertArgs(argsDef, "1, 2", new int[] { 0, 1 });
		assertArgs(argsDef, "test1=1, 2", new int[] { 0, 1 });
		assertArgs(argsDef, "1, test1=2", new int[] { 1, 0 });
		assertArgs(argsDef, "test2=1, 2", new int[] { 1, 0 });
		assertArgs(argsDef, "test1=1, test2=2", new int[] { 0, 1 });
		assertArgs(argsDef, "test2=1, test1=2", new int[] { 1, 0 });
	}
	
	@Test
	public void empty1() {
		final ArgsDefinition argsDef = new ArgsDefinition("test1", "test2");
		
		assertArgs(argsDef, ", 2", new int[] { 0, 1 });
		assertArgs(argsDef, "test1=, 2", new int[] { 0, 1 });
		assertArgs(argsDef, ", test1=2", new int[] { 1, 0 });
		assertArgs(argsDef, "test2=, 2", new int[] { 1, 0 });
		assertArgs(argsDef, "test1=, test2=2", new int[] { 0, 1 });
		assertArgs(argsDef, "test2=, test1=2", new int[] { 1, 0 });
	}
	
	@Test
	public void empty2() {
		final ArgsDefinition argsDef = new ArgsDefinition("test1", "test2");
		
		assertArgs(argsDef, "1, ", new int[] { 0, 1 });
		assertArgs(argsDef, "test1=1, ", new int[] { 0, 1 });
		assertArgs(argsDef, "1, test1=", new int[] { 1, 0 });
		assertArgs(argsDef, "test2=1, ", new int[] { 1, 0 });
		assertArgs(argsDef, "test1=1, test2=", new int[] { 0, 1 });
		assertArgs(argsDef, "test2=1, test1=", new int[] { 1, 0 });
	}
	
	@Test
	public void partialMatch() {
		final ArgsDefinition argsDef = new ArgsDefinition("b", "aaa", "aa");
		
		assertArgs(argsDef, "aaa=1, a=2, 3", new int[] { 1, 2, 0 });
		assertArgs(argsDef, "aaa=1, a=2, a=3", new int[] { 1, 2, -1 });
		assertArgs(argsDef, "a=1, 2", new int[] { -1, 0 });
	}
	
	
	private void assertArgs(final ArgsDefinition argsDef, final String code, final int[] expected) {
		final Args callArgs = this.scanner.scanFCallArgs(this.input.reset(code).init(), true);
		
		final FCallArgMatch readedArgs = RAst.matchArgs(callArgs, argsDef);
		
		Assert.assertArrayEquals(expected, readedArgs.argsNode2argsDef);
	}
	
}