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 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
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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.runtime.builtins;

import com.oracle.truffle.api.object.Shape;
import com.oracle.truffle.api.strings.TruffleString;
import com.oracle.truffle.js.builtins.MapFunctionBuiltins;
import com.oracle.truffle.js.builtins.MapPrototypeBuiltins;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.JSRealm;
import com.oracle.truffle.js.runtime.Strings;
import com.oracle.truffle.js.runtime.Symbol;
import com.oracle.truffle.js.runtime.objects.JSAttributes;
import com.oracle.truffle.js.runtime.objects.JSDynamicObject;
import com.oracle.truffle.js.runtime.objects.JSObject;
import com.oracle.truffle.js.runtime.objects.JSObjectUtil;
import com.oracle.truffle.js.runtime.util.JSHashMap;

public final class JSMap extends JSNonProxy implements JSConstructorFactory.Default.WithFunctionsAndSpecies, PrototypeSupplier {

    public static final JSMap INSTANCE = new JSMap();

    public static final TruffleString CLASS_NAME = Strings.constant("Map");
    public static final TruffleString PROTOTYPE_NAME = Strings.constant("Map.prototype");

    private JSMap() {
    }

    public static JSMapObject create(JSContext context, JSRealm realm) {
        JSObjectFactory factory = context.getMapFactory();
        return create(factory, realm, factory.getPrototype(realm));
    }

    public static JSMapObject create(JSContext context, JSRealm realm, JSDynamicObject proto) {
        JSObjectFactory factory = context.getMapFactory();
        return create(factory, realm, proto);
    }

    private static JSMapObject create(JSObjectFactory factory, JSRealm realm, JSDynamicObject proto) {
        JSHashMap internalMap = new JSHashMap();
        var shape = factory.getShape(realm, proto);
        var newObj = factory.initProto(new JSMapObject(shape, proto, internalMap), realm, proto);
        return factory.trackAllocation(newObj);
    }

    public static JSHashMap getInternalMap(JSDynamicObject obj) {
        assert isJSMap(obj);
        return ((JSMapObject) obj).getMap();
    }

    public static int getMapSize(JSDynamicObject obj) {
        assert isJSMap(obj);
        return getInternalMap(obj).size();
    }

    @Override
    public JSDynamicObject createPrototype(final JSRealm realm, JSFunctionObject ctor) {
        JSObject prototype = JSObjectUtil.createOrdinaryPrototypeObject(realm);
        JSObjectUtil.putConstructorProperty(prototype, ctor);
        // sets the size just for the prototype
        JSObjectUtil.putAccessorsFromContainer(realm, prototype, MapPrototypeBuiltins.BUILTINS);
        JSObjectUtil.putFunctionsFromContainer(realm, prototype, MapPrototypeBuiltins.BUILTINS);
        JSObjectUtil.putToStringTag(prototype, CLASS_NAME);
        // The initial value of the @@iterator property is the same function object as
        // the initial value of the entries property.
        Object entriesFunction = JSDynamicObject.getOrNull(prototype, Strings.ENTRIES);
        JSObjectUtil.putDataProperty(prototype, Symbol.SYMBOL_ITERATOR, entriesFunction, JSAttributes.getDefaultNotEnumerable());
        return prototype;
    }

    @Override
    public Shape makeInitialShape(JSContext context, JSDynamicObject prototype) {
        Shape initialShape = JSObjectUtil.getProtoChildShape(prototype, JSMap.INSTANCE, context);
        return initialShape;
    }

    public static JSConstructor createConstructor(JSRealm realm) {
        return INSTANCE.createConstructorAndPrototype(realm, MapFunctionBuiltins.BUILTINS);
    }

    @Override
    public TruffleString getClassName() {
        return CLASS_NAME;
    }

    public static boolean isJSMap(Object obj) {
        return obj instanceof JSMapObject;
    }

    @Override
    public JSDynamicObject getIntrinsicDefaultProto(JSRealm realm) {
        return realm.getMapPrototype();
    }

}