/*
 * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
 *
 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
 * derivative works of, display, perform, and distribute the Software and make,
 * use, sell, offer for sale, import, export, have made, and have sold the
 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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 * SOFTWARE.
 */
package com.oracle.truffle.js.nodes.cast;

import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.js.nodes.JavaScriptBaseNode;
import com.oracle.truffle.js.runtime.BigInt;
import com.oracle.truffle.js.runtime.Errors;
import com.oracle.truffle.js.runtime.JSRuntime;
import com.oracle.truffle.js.runtime.SafeInteger;
import com.oracle.truffle.js.runtime.Symbol;

This node is intended to be used only by comparison operators.
/**
 * This node is intended to be used only by comparison operators.
 */
public abstract class JSToStringOrNumberNode extends JavaScriptBaseNode {

    public abstract Object execute(Object operand);

    public static JSToStringOrNumberNode create() {
        return JSToStringOrNumberNodeGen.create();
    }

    @Specialization
    protected int doInteger(int value) {
        return value;
    }

    @Specialization
    protected SafeInteger doSafeInteger(SafeInteger value) {
        return value;
    }

    @Specialization
    protected int doBoolean(boolean value) {
        return doBooleanStatic(value);
    }

    private static int doBooleanStatic(boolean value) {
        return JSRuntime.booleanToNumber(value);
    }

    @Specialization
    protected boolean doLong(long value) {
        return value != 0L;
    }

    @Specialization
    protected double doDouble(double value) {
        return value;
    }

    @Specialization
    protected String doString(String value) {
        return value;
    }

    @Specialization(guards = "isJSObject(value)")
    protected double doJSObject(DynamicObject value,
                    @Cached("create()") JSToDoubleNode toDoubleNode) {
        return toDoubleNode.executeDouble(value);
    }

    @Specialization(guards = "isJSNull(value)")
    protected int doNull(@SuppressWarnings("unused") Object value) {
        return 0;
    }

    @Specialization
    protected Object doSymbol(@SuppressWarnings("unused") Symbol value) {
        throw Errors.createTypeErrorCannotConvertToNumber("a Symbol value", this);
    }

    @Specialization(guards = "isUndefined(value)")
    protected double doUndefined(@SuppressWarnings("unused") Object value) {
        return Double.NaN;
    }

    @Specialization
    protected static BigInt doBigInt(BigInt value) {
        return value;
    }
}