/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.tools.headers;

import java.io.BufferedWriter;
import java.io.File;
import java.io.OutputStreamWriter;
import java.util.ArrayList;

import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.tools.FileProcessor;

public class HeaderFixer {
	static int filesScanned;
	static int filesChanged;
	static class HeaderFileProcessor extends FileProcessor {
		final String header;

		public HeaderFileProcessor () {
			header = new FileHandle("assets/licence-header.txt").readString();
			addInputSuffix(".java");
			setFlattenOutput(false);
			setRecursive(true);
		}

		@Override
		protected void processFile (Entry inputFile) throws Exception {
			filesScanned++;
			String content = new FileHandle(inputFile.inputFile).readString();
			if (content.trim().startsWith("package")) {
				System.out.println("File '" + inputFile.inputFile + "' header fixed");
				filesChanged++;
				BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileHandle(inputFile.outputFile).write(false)));

				writer.write(header + "\n\n" + content);
				writer.close();
			}
		}

		@Override
		protected void processDir (Entry inputDir, ArrayList<Entry> value) throws Exception {
		}
	}

	public static void process (String directory) throws Exception {
		HeaderFileProcessor processor = new HeaderFileProcessor();
		processor.process(new File(directory), new File(directory));
	}

	public static void main (String[] args) throws Exception {
		if (args.length != 1) {
			HeaderFixer.process("../../gdx/");
			HeaderFixer.process("../../backends/");
			HeaderFixer.process("../../tests/");
			HeaderFixer.process("../../extensions/");
		} else {
			HeaderFixer.process(args[0]);
		}
		System.out.println("Changed " + filesChanged + " / " + filesScanned + " files.");
	}
}