/**
 * Aptana Studio
 * Copyright (c) 2005-2012 by Appcelerator, Inc. All Rights Reserved.
 * Licensed under the terms of the GNU Public License (GPL) v3 (with exceptions).
 * Please see the license.html included with this distribution for details.
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.ruby.internal.core.build;

import java.util.ArrayList;
import java.util.Collection;

import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.jrubyparser.CompatVersion;

import com.aptana.core.build.IProblem;
import com.aptana.core.build.IProblem.Severity;
import com.aptana.core.build.Problem;
import com.aptana.core.build.RequiredBuildParticipant;
import com.aptana.index.core.build.BuildContext;
import com.aptana.parsing.ast.IParseError;
import com.aptana.ruby.core.RubyParseState;
import com.aptana.ruby.launching.RubyLaunchingPlugin;

/**
 * Parses the file with the correct ruby parser given the project setup. Marks syntax errors/warnings.
 * 
 * @author cwilliams
 */
public class RubyValidator extends RequiredBuildParticipant
{
	private CompatVersion version;

	@Override
	public void buildStarting(IProject project, int kind, IProgressMonitor monitor)
	{
		super.buildStarting(project, kind, monitor);

		String rubyVersion = RubyLaunchingPlugin.getRubyVersionForProject(project);
		if (rubyVersion != null && rubyVersion.startsWith("ruby 1.9")) //$NON-NLS-1$
		{
			version = CompatVersion.RUBY1_9;
		}
		else if (rubyVersion != null && rubyVersion.startsWith("ruby 1.8")) //$NON-NLS-1$
		{
			version = CompatVersion.RUBY1_8;
		}
		else
		{
			version = CompatVersion.BOTH;
		}
	}

	@Override
	public void buildEnding(IProgressMonitor monitor)
	{
		version = CompatVersion.BOTH;
		super.buildEnding(monitor);
	}

	public void buildFile(BuildContext context, IProgressMonitor monitor)
	{
		if(context==null){
			return;
		}
		if(!context.isFullBuild()&&!context.isSave()){
			return;
		}
		String contents = null;
		String uri = context.getName();
		try
		{
			contents = context.getContents();

			RubyParseState parseState = new RubyParseState(contents, uri, 1, version);
			uri = context.getURI().toString();
			context.getAST(parseState);
		}
		catch (CoreException e)
		{
			// ignore, just forcing a parse
		}

		Collection<IProblem> problems = new ArrayList<IProblem>();
		for (IParseError parseError : context.getParseErrors())
		{
			int severity = parseError.getSeverity().getCode();
			int line = -1;
			if (contents != null)
			{
				line = getLineNumber(parseError.getOffset(), contents);
			}
			problems.add(new Problem(severity, parseError.getMessage(), parseError.getOffset(), parseError.getLength(),
					line, uri));
		}
		context.putProblems(IMarker.PROBLEM, problems);
	}

	public void deleteFile(BuildContext context, IProgressMonitor monitor)
	{
		context.removeProblems(IMarker.PROBLEM);
	}

}