package slangc.model.expressions;

import slangc.api.BytecodeInstructionWriter;
import slangc.api.Reporter;
import slangc.bytecode.TypeSignature;
import slangc.model.ClauseModel;
import slangc.model.ExpressionModel;
import slangc.model.ExpressionOwner;
import slangc.model.ExpressionResult;
import slangc.model.MethodModel;
import slangc.model.TypeModel;
import slangc.model.UserTypeModel;
import slangc.model.clauses.Arguments;
import slangc.parser.Branch;
import slangc.parser.Node;

public class AutomaticMethodCallExpression extends ExpressionModel /*implements ExpressionOwner*/ {
	private String name;
	private Arguments arguments;
	private MethodModel targetMethod;

	public AutomaticMethodCallExpression(ExpressionOwner owner, Node source) {
		super(owner, source);
		name = UserTypeModel.plainName(((Branch)((Branch)source).getSubnode(0)).getSubnode(0));

		arguments = (Arguments)ClauseModel.construct(this, ((Branch)source).getSubnode(1));
		//sourceFile.annotate(ErrorType.INTERNAL_ERROR, "Unrecognised expression (Internal error/TODO)");
	}

	@Override
	public void dump(Reporter reporter, String indent, String incr) {
		reporter.note("DUMP", indent + "> Automatic method call expression '" + name + "' of:");
		dumpResolved(reporter, indent + incr, incr);
		arguments.dump(reporter, indent + incr, incr);
	}
	
	public String getName() {
		return name;
	}

	@Override
	public TypeModel getExpectedResult(ExpressionModel e) {
		// TODO Auto-generated method stub
		return null;
	}
	
	public Arguments getArguments() {
		return arguments;
	}
	
	@Override
	public ExpressionModel[] getSubexpressions() {
		return arguments.getSubexpressions();
	}
	
	@Override
	protected ExpressionResult resolveResult() {
		targetMethod = bestTargetMethod(lookupSimpleMethod(name), arguments);
		return ExpressionResult.fromMethodResult(targetMethod);
	}
	
	@Override
	public boolean hasTargetMethod() {
		return true;
	}
	
	@Override
	public MethodModel getTargetMethod() {
		return targetMethod;
	}
	
	@Override
	public TypeSignature innerGenerate(BytecodeInstructionWriter w) {
		arguments.generate(w, getTargetMethod(), true);
		if (!getTargetMethod().isStatic()) {
			OuterThisExpression.generatePossibleOuterThis(w, (UserTypeModel)getMethodOrField().getOwner(), getTargetMethod().getOwner());
		}
		w.genCall(getTargetMethod().getMethodSignature());
		return getTargetMethod().getMethodSignature().returnType;
	}

	public TypeModel resolveType(Node n) {
		return super.resolveType(n); // TODO: Better support for interfaces
	}
}