/*******************************************************************************
 * Copyright (c) 2014 Jeff Martin.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Jeff Martin - initial API and implementation
 ******************************************************************************/
package cuchaz.enigma.mapping;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class MappingsWriter {
	
	public void write(Writer out, Mappings mappings) throws IOException {
		write(new PrintWriter(out), mappings);
	}
	
	public void write(PrintWriter out, Mappings mappings) throws IOException {
		for (ClassMapping classMapping : sorted(mappings.classes())) {
			write(out, classMapping, 0);
		}
	}
	
	private void write(PrintWriter out, ClassMapping classMapping, int depth) throws IOException {
		if (classMapping.getDeobfName() == null) {
			out.format("%sCLASS %s\n", getIndent(depth), classMapping.getObfFullName());
		} else {
			out.format("%sCLASS %s %s\n", getIndent(depth), classMapping.getObfFullName(), classMapping.getDeobfName());
		}
		
		for (ClassMapping innerClassMapping : sorted(classMapping.innerClasses())) {
			write(out, innerClassMapping, depth + 1);
		}
		
		for (FieldMapping fieldMapping : sorted(classMapping.fields())) {
			write(out, fieldMapping, depth + 1);
		}
		
		for (MethodMapping methodMapping : sorted(classMapping.methods())) {
			write(out, methodMapping, depth + 1);
		}
	}
	
	private void write(PrintWriter out, FieldMapping fieldMapping, int depth) throws IOException {
		out.format("%sFIELD %s %s %s\n", getIndent(depth), fieldMapping.getObfName(), fieldMapping.getDeobfName(), fieldMapping.getObfType().toString());
	}
	
	private void write(PrintWriter out, MethodMapping methodMapping, int depth) throws IOException {
		if (methodMapping.getDeobfName() == null) {
			out.format("%sMETHOD %s %s\n", getIndent(depth), methodMapping.getObfName(), methodMapping.getObfSignature());
		} else {
			out.format("%sMETHOD %s %s %s\n", getIndent(depth), methodMapping.getObfName(), methodMapping.getDeobfName(), methodMapping.getObfSignature());
		}
		
		for (ArgumentMapping argumentMapping : sorted(methodMapping.arguments())) {
			write(out, argumentMapping, depth + 1);
		}
	}
	
	private void write(PrintWriter out, ArgumentMapping argumentMapping, int depth) throws IOException {
		out.format("%sARG %d %s\n", getIndent(depth), argumentMapping.getIndex(), argumentMapping.getName());
	}
	
	private <T extends Comparable<T>> List<T> sorted(Iterable<T> classes) {
		List<T> out = new ArrayList<T>();
		for (T t : classes) {
			out.add(t);
		}
		Collections.sort(out);
		return out;
	}
	
	private String getIndent(int depth) {
		StringBuilder buf = new StringBuilder();
		for (int i = 0; i < depth; i++) {
			buf.append("\t");
		}
		return buf.toString();
	}
}