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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package com.oracle.truffle.js.nodes.function;

import java.util.Set;

import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.api.nodes.ExplodeLoop;
import com.oracle.truffle.api.profiles.InlinedBranchProfile;
import com.oracle.truffle.js.nodes.JavaScriptNode;
import com.oracle.truffle.js.nodes.instrumentation.JSInputGeneratingNodeWrapper;
import com.oracle.truffle.js.runtime.JSConfig;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.util.SimpleArrayList;

public class JSFunctionArgumentsNode extends AbstractFunctionArgumentsNode {

    @Children protected final JavaScriptNode[] args;

    public static AbstractFunctionArgumentsNode create(JSContext context, JavaScriptNode[] args) {
        assert args.length <= context.getFunctionArgumentsLimit();
        for (JavaScriptNode arg : args) {
            if (arg instanceof SpreadArgumentNode) {
                return SpreadFunctionArgumentsNodeGen.create(args);
            }
        }
        if (args.length == 0) {
            return new JSFunctionZeroArgumentsNode();
        } else if (args.length == 1) {
            return JSFunctionOneArgumentNode.create(args[0]);
        }
        return new JSFunctionArgumentsNode(args);
    }

    protected JSFunctionArgumentsNode(JavaScriptNode[] args) {
        this.args = args;
    }

    @Override
    public int getCount(VirtualFrame frame) {
        return args.length;
    }

    @Override
    @ExplodeLoop
    public Object[] executeFillObjectArray(VirtualFrame frame, Object[] arguments, int delta) {
        for (int i = 0; i < args.length; i++) {
            arguments[i + delta] = args[i].execute(frame);
        }
        return arguments;
    }

    @Override
    protected AbstractFunctionArgumentsNode copyUninitialized(Set> materializedTags) {
        return new JSFunctionArgumentsNode(JavaScriptNode.cloneUninitialized(args, materializedTags));
    }

    @Override
    public void materializeInstrumentableArguments() {
        for (int i = 0; i < args.length; i++) {
            if (!(args[i] instanceof SpreadArgumentNode) && !args[i].isInstrumentable()) {
                args[i] = insert(JSInputGeneratingNodeWrapper.create(args[i]));
            }
        }
    }

}

class JSFunctionZeroArgumentsNode extends AbstractFunctionArgumentsNode {
    protected JSFunctionZeroArgumentsNode() {
    }

    @Override
    public int getCount(VirtualFrame frame) {
        return 0;
    }

    @Override
    public Object[] executeFillObjectArray(VirtualFrame frame, Object[] arguments, int delta) {
        return arguments;
    }

    @Override
    protected AbstractFunctionArgumentsNode copyUninitialized(Set> materializedTags) {
        return new JSFunctionZeroArgumentsNode();
    }

    @Override
    public void materializeInstrumentableArguments() {
        // No-op
    }

}

class JSFunctionOneArgumentNode extends AbstractFunctionArgumentsNode {
    @Child private JavaScriptNode child;

    protected JSFunctionOneArgumentNode(JavaScriptNode child) {
        this.child = child;
    }

    public static AbstractFunctionArgumentsNode create(JavaScriptNode child) {
        return new JSFunctionOneArgumentNode(child);
    }

    @Override
    public int getCount(VirtualFrame frame) {
        return 1;
    }

    @Override
    public Object[] executeFillObjectArray(VirtualFrame frame, Object[] arguments, int delta) {
        arguments[delta] = child.execute(frame);
        return arguments;
    }

    @Override
    protected AbstractFunctionArgumentsNode copyUninitialized(Set> materializedTags) {
        return new JSFunctionOneArgumentNode(JavaScriptNode.cloneUninitialized(child, materializedTags));
    }

    @Override
    public void materializeInstrumentableArguments() {
        if (!child.isInstrumentable()) {
            child = insert(JSInputGeneratingNodeWrapper.create(child));
        }
    }
}

abstract class SpreadFunctionArgumentsNode extends JSFunctionArgumentsNode {

    protected SpreadFunctionArgumentsNode(JavaScriptNode[] args) {
        super(args);
    }

    @Override
    public int getCount(VirtualFrame frame) {
        return args.length;
    }

    @ExplodeLoop
    @Specialization
    protected final Object[] fillObjectArray(VirtualFrame frame, Object[] arguments, int fixedArgumentsLength,
                    @Cached InlinedBranchProfile growBranch) {
        // assume size that avoids growing
        SimpleArrayList