package slangc.model.statements;

import slangc.api.BytecodeInstructionWriter;
import slangc.api.Reporter;
import slangc.model.ExpressionModel;
import slangc.model.ExpressionOwner;
import slangc.model.InnerTypeScope;
import slangc.model.MemberModel;
import slangc.model.StatementModel;
import slangc.model.StatementOwner;
import slangc.model.TypeModel;
import slangc.parser.Branch;
import slangc.parser.Node;

public class SynchronizedStatement extends StatementModel implements StatementOwner, ExpressionOwner {
	private ExpressionModel condition;
	private StatementModel innerStatement;

	public SynchronizedStatement(StatementOwner owner, Branch source) {
		super(owner, source);
		condition = ExpressionModel.construct(this, source.getSubnode(1));
		innerStatement = StatementModel.construct(this, source.getSubnode(2));
	}

	@Override
	public void dump(Reporter reporter, String indent, String incr) {
		reporter.note("DUMP", indent + "> Synchronized:");
		condition.dump(reporter, indent + incr, incr);
		innerStatement.dump(reporter, indent + incr, incr);
	}
	
	@Override
	public int resolveExpressions() {
		return condition.resolveExpressions() + innerStatement.resolveExpressions();
	}

	//@Override
	public TypeModel resolveType(Node subnode) {
		return getOwner().resolveType(subnode);
	}

	public MethodModel[] lookupSimpleMethod(String name) {
		// TODO: Better interface support
		return super.lookupSimpleMethod(name);
	}

	public slangc.model.Named lookupSimpleName(String name) {
		// TODO: Better interface support
		return super.lookupSimpleName(name);
	}

	//@Override
	public MemberModel getMethodOrField() {
		return getOwner().getMethodOrField();
	}

	//@Override
	public InnerTypeScope getTypeScope() {
		return getOwner().getTypeScope();
	}
	
	//@Override
	public TypeModel getExpectedResult(ExpressionModel e) {
		// TODO Should probably be Object or some configurable target
		return null;
	}
	
	@Override
	public void innerGenerate(BytecodeInstructionWriter w) {
		BytecodeInstructionWriter.Label begin = w.newLabel("sync_begin");
		BytecodeInstructionWriter.Label catchEnd = w.newLabel("sync_end");
		BytecodeInstructionWriter.FinallyLabel fin = w.newFinallyLabel("sync_finally", begin, catchEnd);
		
		condition.generate(w);
		w.genLock();
		
		w.labelHere(begin);
		innerStatement.generate(w);
		w.labelHere(catchEnd);
		
		w.labelHere(fin);
		condition.generate(w);
		w.genCheckRethrow();
		w.genUnlock();
	}
}