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/*
 * Copyright (c) 2020, 2023, 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
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 * SOFTWARE.
 */
package com.oracle.graal.python.nodes.util;

import static com.oracle.graal.python.builtins.PythonBuiltinClassType.TypeError;

import java.math.BigInteger;

import com.oracle.graal.python.builtins.modules.MathGuards;
import com.oracle.graal.python.builtins.objects.ints.PInt;
import com.oracle.graal.python.lib.PyIndexCheckNode;
import com.oracle.graal.python.lib.PyNumberIndexNode;
import com.oracle.graal.python.nodes.ErrorMessages;
import com.oracle.graal.python.nodes.PRaiseNode;
import com.oracle.graal.python.nodes.object.GetClassNode;
import com.oracle.graal.python.nodes.truffle.PythonArithmeticTypes;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.GenerateCached;
import com.oracle.truffle.api.dsl.GenerateInline;
import com.oracle.truffle.api.dsl.GenerateUncached;
import com.oracle.truffle.api.dsl.ImportStatic;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.dsl.TypeSystemReference;
import com.oracle.truffle.api.nodes.Node;

@TypeSystemReference(PythonArithmeticTypes.class)
@GenerateUncached
@GenerateInline(inlineByDefault = true)
@GenerateCached
@ImportStatic(MathGuards.class)
public abstract class CastToJavaBigIntegerNode extends Node {
    public abstract BigInteger execute(Node inliningTarget, boolean x);

    public abstract BigInteger execute(Node inliningTarget, int x);

    public abstract BigInteger execute(Node inliningTarget, long x);

    public abstract BigInteger execute(Node inliningTarget, Object x);

    @Specialization
    @TruffleBoundary
    protected static BigInteger fromBoolean(boolean x) {
        return x ? BigInteger.ONE : BigInteger.ZERO;
    }

    @Specialization
    @TruffleBoundary
    protected static BigInteger fromInt(int x) {
        return BigInteger.valueOf(x);
    }

    @Specialization
    @TruffleBoundary
    protected static BigInteger fromLong(long x) {
        return BigInteger.valueOf(x);
    }

    @Specialization
    protected static BigInteger fromPInt(PInt x) {
        return x.getValue();
    }

    @Specialization
    protected static BigInteger generic(Node inliningTarget, Object x,
                    @Cached PRaiseNode.Lazy raise,
                    @Cached(inline = false) CastToJavaBigIntegerNode rec,
                    @Cached GetClassNode getClassNode,
                    @Cached PyIndexCheckNode indexCheckNode,
                    @Cached PyNumberIndexNode indexNode) {
        if (indexCheckNode.execute(inliningTarget, x)) {
            return rec.execute(null, indexNode.execute(null, inliningTarget, x));
        }
        throw raise.get(inliningTarget).raise(TypeError, ErrorMessages.OBJ_CANNOT_BE_INTERPRETED_AS_INTEGER, getClassNode.execute(inliningTarget, x));
    }
}