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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.array.dyn;

import static com.oracle.truffle.js.runtime.builtins.JSAbstractArray.arraySetArray;
import static com.oracle.truffle.js.runtime.builtins.JSAbstractArray.arraySetLength;
import static com.oracle.truffle.js.runtime.builtins.JSAbstractArray.arraySetUsedLength;

import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.js.runtime.JSConfig;
import com.oracle.truffle.js.runtime.array.ScriptArray;
import com.oracle.truffle.js.runtime.objects.JSDynamicObject;

public final class ZeroBasedJSObjectArray extends AbstractJSObjectArray {

    private static final ZeroBasedJSObjectArray ZERO_BASED_JSOBJECT_ARRAY = new ZeroBasedJSObjectArray(INTEGRITY_LEVEL_NONE, createCache());

    public static <T> ZeroBasedJSObjectArray makeZeroBasedJSObjectArray(DynamicObject object, int length, int usedLength, T[] array, int integrityLevel) {
        ZeroBasedJSObjectArray arrayType = createZeroBasedJSObjectArray().setIntegrityLevel(integrityLevel);
        arraySetLength(object, length);
        arraySetUsedLength(object, usedLength);
        arraySetArray(object, array);
        return arrayType;
    }

    public static ZeroBasedJSObjectArray createZeroBasedJSObjectArray() {
        return ZERO_BASED_JSOBJECT_ARRAY;
    }

    private ZeroBasedJSObjectArray(int integrityLevel, DynamicArrayCache cache) {
        super(integrityLevel, cache);
    }

    @Override
    public boolean isSupported(DynamicObject object, long index) {
        return isSupportedZeroBased(object, (int) index);
    }

    @Override
    public DynamicObject getInBoundsFastJSObject(DynamicObject object, int index) {
        return castNonNull(getArray(object)[index]);
    }

    @Override
    public void setInBoundsFast(DynamicObject object, int index, JSDynamicObject value) {
        getArray(object)[index] = checkNonNull(value);
        if (JSConfig.TraceArrayWrites) {
            traceWriteValue("InBoundsFast", index, value);
        }
    }

    @Override
    protected int prepareInBoundsFast(DynamicObject object, long index) {
        return (int) index;
    }

    @Override
    protected int prepareInBounds(DynamicObject object, int index, ProfileHolder profile) {
        prepareInBoundsZeroBased(object, index, profile);
        return index;
    }

    @Override
    protected int prepareSupported(DynamicObject object, int index, ProfileHolder profile) {
        prepareSupportedZeroBased(object, index, profile);
        return index;
    }

    @Override
    protected void setLengthLess(DynamicObject object, long length, ProfileHolder profile) {
        setLengthLessZeroBased(object, length, profile);
    }

    @Override
    public ContiguousJSObjectArray toContiguous(DynamicObject object, long index, Object value) {
        JSDynamicObject[] array = getArray(object);
        int length = lengthInt(object);
        int usedLength = getUsedLength(object);
        ContiguousJSObjectArray newArray = ContiguousJSObjectArray.makeContiguousJSObjectArray(object, length, array, 0, 0, usedLength, integrityLevel);
        if (JSConfig.TraceArrayTransitions) {
            traceArrayTransition(this, newArray, index, value);
        }
        return newArray;
    }

    @Override
    public HolesJSObjectArray toHoles(DynamicObject object, long index, Object value) {
        JSDynamicObject[] array = getArray(object);
        int length = lengthInt(object);
        int usedLength = getUsedLength(object);
        HolesJSObjectArray newArray = HolesJSObjectArray.makeHolesJSObjectArray(object, length, array, 0, 0, usedLength, 0, integrityLevel);
        if (JSConfig.TraceArrayTransitions) {
            traceArrayTransition(this, newArray, index, value);
        }
        return newArray;
    }

    @Override
    public ZeroBasedObjectArray toObject(DynamicObject object, long index, Object value) {
        JSDynamicObject[] array = getArray(object);
        int length = lengthInt(object);
        int usedLength = getUsedLength(object);
        Object[] doubleCopy = ArrayCopy.jsobjectToObject(array, 0, usedLength);
        ZeroBasedObjectArray newArray = ZeroBasedObjectArray.makeZeroBasedObjectArray(object, length, usedLength, doubleCopy, integrityLevel);
        if (JSConfig.TraceArrayTransitions) {
            traceArrayTransition(this, newArray, index, value);
        }
        return newArray;
    }

    @Override
    public Object[] toArray(DynamicObject object) {
        return toArrayZeroBased(object);
    }

    @Override
    public long firstElementIndex(DynamicObject object) {
        return 0;
    }

    @Override
    public long lastElementIndex(DynamicObject object) {
        return getUsedLength(object) - 1;
    }

    @Override
    public ScriptArray removeRangeImpl(DynamicObject object, long start, long end) {
        JSDynamicObject[] array = getArray(object);
        int usedLength = getUsedLength(object);
        System.arraycopy(array, (int) end, array, (int) start, Math.max(0, (int) (usedLength - end)));
        return this;
    }

    @Override
    public ScriptArray addRangeImpl(DynamicObject object, long offset, int size) {
        return addRangeImplZeroBased(object, offset, size);
    }

    @Override
    public boolean hasHoles(DynamicObject object) {
        int length = lengthInt(object);
        int usedLength = getUsedLength(object);
        return usedLength < length;
    }

    @Override
    protected ZeroBasedJSObjectArray withIntegrityLevel(int newIntegrityLevel) {
        return new ZeroBasedJSObjectArray(newIntegrityLevel, cache);
    }

    @Override
    public long nextElementIndex(DynamicObject object, long index) {
        return nextElementIndexZeroBased(object, index);
    }
}