package org.nullbool.editor.impl.model.code;

import java.io.InputStream;
import java.util.concurrent.atomic.AtomicReference;

import org.nullbool.editor.model.code.ICompiler;
import org.nullbool.editor.util.PrefixedStringBuilder;
import org.objectweb.asm.tree.ClassNode;

/**
 * @author Bibl (don't ban me pls)
 * @created 27 Aug 2015 23:39:57
 */
public class InCompilerImpl implements ICompiler<ClassNode> {

	public static final char TAB_CHAR = '\t';
	public static final String TAB = Character.toString(TAB_CHAR);

	@Override
	public void compile(InputStream is, ClassNode cn) {
		AtomicReference<String> prefix = new AtomicReference<String>("");
		PrefixedStringBuilder sb = new PrefixedStringBuilder();
		enterSection(sb, "class");


	}

	public void enterSection(PrefixedStringBuilder sb, String name) {
		sb.append('.').append(name);
		incrementTabIndex(sb.getPrefix());
		sb.ln();
	}

	public void exitSection(PrefixedStringBuilder sb) {
		decrementTabIndex(sb.getPrefix());
		sb.ln();
		sb.appendLn("}");
	}

	public static String incrementTabIndex(String oldPrefix) {
		return oldPrefix + TAB;
	}

	public static String decrementTabIndex(String oldPrefix) {
		if(oldPrefix != null && !oldPrefix.isEmpty()) {
			// assumption: prefix string only contains tabs
			if(oldPrefix.replace(TAB, "").length() != 0) {
				throw new IllegalArgumentException("Prefix contains chars other than tabs: " + oldPrefix);
			} else {
				return oldPrefix.substring(0, oldPrefix.length() - 1); // remove last tab
			}
		} else {
			return "";
		}
	}
}