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/*
 * Copyright (c) 2022, 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,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.oracle.graal.python.nodes.bytecode;

import com.oracle.graal.python.builtins.objects.PNone;
import com.oracle.graal.python.builtins.objects.exception.ExceptionNodes;
import com.oracle.graal.python.builtins.objects.function.PArguments;
import com.oracle.graal.python.builtins.objects.type.SpecialMethodSlot;
import com.oracle.graal.python.lib.PyObjectIsTrueNode;
import com.oracle.graal.python.nodes.PNodeWithContext;
import com.oracle.graal.python.nodes.call.special.CallQuaternaryMethodNode;
import com.oracle.graal.python.nodes.object.GetClassNode;
import com.oracle.graal.python.runtime.exception.PException;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.Bind;
import com.oracle.truffle.api.dsl.Cached;
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.NeverDefault;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.exception.AbstractTruffleException;
import com.oracle.truffle.api.frame.Frame;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.Node;

@GenerateUncached
@ImportStatic(SpecialMethodSlot.class)
@GenerateInline(false) // Used in BCI
public abstract class ExitWithNode extends PNodeWithContext {
    public abstract int execute(Frame frame, int stackTop, boolean rootNodeVisible);

    @Specialization
    int exit(VirtualFrame virtualFrame, int stackTopIn, boolean rootNodeVisible,
                    @Bind("this") Node inliningTarget,
                    @Cached CallQuaternaryMethodNode callExit,
                    @Cached GetClassNode getClassNode,
                    @Cached ExceptionNodes.GetTracebackNode getTracebackNode,
                    @Cached PyObjectIsTrueNode isTrueNode) {
        int stackTop = stackTopIn;
        Object exception = virtualFrame.getObject(stackTop);
        virtualFrame.setObject(stackTop--, null);
        Object exit = virtualFrame.getObject(stackTop);
        virtualFrame.setObject(stackTop--, null);
        Object contextManager = virtualFrame.getObject(stackTop);
        virtualFrame.setObject(stackTop--, null);
        if (exception == PNone.NONE) {
            callExit.execute(virtualFrame, exit, contextManager, PNone.NONE, PNone.NONE, PNone.NONE);
        } else {
            PException savedExcState = PArguments.getException(virtualFrame);
            try {
                Object pythonException = exception;
                if (exception instanceof PException) {
                    PArguments.setException(virtualFrame, (PException) exception);
                    pythonException = ((PException) exception).getEscapedException();
                }
                Object excType = getClassNode.execute(inliningTarget, pythonException);
                Object excTraceback = getTracebackNode.execute(inliningTarget, pythonException);
                Object result = callExit.execute(virtualFrame, exit, contextManager, excType, pythonException, excTraceback);
                if (!isTrueNode.execute(virtualFrame, inliningTarget, result)) {
                    if (exception instanceof PException) {
                        throw ((PException) exception).getExceptionForReraise(rootNodeVisible);
                    } else if (exception instanceof AbstractTruffleException) {
                        throw (AbstractTruffleException) exception;
                    } else {
                        throw CompilerDirectives.shouldNotReachHere("Exception not on stack");
                    }
                }
            } finally {
                PArguments.setException(virtualFrame, savedExcState);
            }
        }
        return stackTop;
    }

    @NeverDefault
    public static ExitWithNode create() {
        return ExitWithNodeGen.create();
    }

    public static ExitWithNode getUncached() {
        return ExitWithNodeGen.getUncached();
    }
}