/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.skywalking.oal.rt.parser;

import java.util.ArrayList;
import java.util.List;
import lombok.Getter;
import lombok.Setter;
import org.apache.skywalking.oal.rt.util.ClassMethodUtil;
import org.apache.skywalking.oal.rt.util.TypeCastUtil;

@Getter
@Setter
public class EntryMethod {
    static final int LITERAL_TYPE = 1;
    static final int ATTRIBUTE_EXP_TYPE = 2;
    static final int EXPRESSION_TYPE = 3;

    private String methodName;
    private List<Integer> argTypes = new ArrayList<>();
    private List<Object> argsExpressions = new ArrayList<>();

    void addArg(Class<?> parameterType, Argument arg) {
        if (arg.getType() == LITERAL_TYPE) {
            // As literal type, there is always one element.
            addArg(parameterType, arg.getType(), arg.getText().get(0));
            return;
        }
        addArg(parameterType, arg.getType(), parameterType.equals(boolean.class) ?
            TypeCastUtil.withCast(arg.getCastType(), "source." + ClassMethodUtil.toIsMethod(arg.getText()))
            :
            TypeCastUtil.withCast(arg.getCastType(), "source." + ClassMethodUtil.toGetMethod(arg.getText())));
    }

    void addArg(Class<?> parameterType, String expression) {
        addArg(parameterType, LITERAL_TYPE, expression);
    }

    void addArg(Expression expression) {
        argTypes.add(EXPRESSION_TYPE);
        argsExpressions.add(expression);
    }

    private void addArg(Class<?> parameterType, int type, String expression) {
        if (parameterType.equals(int.class)) {
            expression = "(int)(" + expression + ")";
        } else if (parameterType.equals(long.class)) {
            expression = "(long)(" + expression + ")";
        } else if (parameterType.equals(double.class)) {
            expression = "(double)(" + expression + ")";
        } else if (parameterType.equals(float.class)) {
            expression = "(float)(" + expression + ")";
        }
        argTypes.add(type);
        argsExpressions.add(expression);
    }
}
