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 *
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 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
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 * unmodified Software as contributed to or provided by such licensor, or (ii)
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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.builtins;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.js.builtins.MapFunctionBuiltinsFactory.MapGroupByNodeGen;
import com.oracle.truffle.js.nodes.access.GroupByNode;
import com.oracle.truffle.js.nodes.function.JSBuiltin;
import com.oracle.truffle.js.nodes.function.JSBuiltinNode;
import com.oracle.truffle.js.runtime.JSConfig;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.JSRealm;
import com.oracle.truffle.js.runtime.builtins.BuiltinEnum;
import com.oracle.truffle.js.runtime.builtins.JSArray;
import com.oracle.truffle.js.runtime.builtins.JSArrayObject;
import com.oracle.truffle.js.runtime.builtins.JSMap;
import com.oracle.truffle.js.runtime.builtins.JSMapObject;
import com.oracle.truffle.js.runtime.objects.JSObject;
import com.oracle.truffle.js.runtime.util.JSHashMap;
import java.util.List;
import java.util.Map;

public class MapFunctionBuiltins extends JSBuiltinsContainer.SwitchEnum {
    public static final JSBuiltinsContainer BUILTINS = new MapFunctionBuiltins();

    protected MapFunctionBuiltins() {
        super(JSMap.CLASS_NAME, MapFunction.class);
    }

    public enum MapFunction implements BuiltinEnum {
        // staging
        groupBy(2);

        private final int length;

        MapFunction(int length) {
            this.length = length;
        }

        @Override
        public int getLength() {
            return length;
        }

        @Override
        public int getECMAScriptVersion() {
            if (this == groupBy) {
                return JSConfig.ECMAScript2024;
            }
            return BuiltinEnum.super.getECMAScriptVersion();
        }
    }

    @Override
    protected Object createNode(JSContext context, JSBuiltin builtin, boolean construct, boolean newTarget, MapFunction builtinEnum) {
        switch (builtinEnum) {
            case groupBy:
                return MapGroupByNodeGen.create(context, builtin, args().fixedArgs(2).createArgumentNodes(context));
        }
        return null;
    }

    public abstract static class MapGroupByNode extends JSBuiltinNode {

        public MapGroupByNode(JSContext context, JSBuiltin builtin) {
            super(context, builtin);
        }

        @Specialization
        protected JSObject groupBy(Object items, Object callbackfn,
                        @Cached("create(getContext(), false)") GroupByNode groupByNode) {
            Map> groups = groupByNode.execute(items, callbackfn);
            JSMapObject map = JSMap.create(getContext(), getRealm());
            setGroups(map, groups);
            return map;
        }

        @TruffleBoundary
        protected void setGroups(JSMapObject map, Map> groups) {
            JSHashMap internalMap = JSMap.getInternalMap(map);
            JSRealm realm = getRealm();
            JSContext context = getContext();
            for (Map.Entry> entry : groups.entrySet()) {
                JSArrayObject elements = JSArray.createConstant(context, realm, entry.getValue().toArray());
                internalMap.put(entry.getKey(), elements);
            }
        }

    }

}