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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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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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package com.oracle.truffle.js.runtime.interop;

import java.util.ArrayList;
import java.util.List;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.interop.ArityException;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.InvalidArrayIndexException;
import com.oracle.truffle.api.interop.UnknownIdentifierException;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.interop.UnsupportedTypeException;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.js.nodes.interop.ExportValueNode;
import com.oracle.truffle.js.nodes.interop.ImportValueNode;
import com.oracle.truffle.js.runtime.Errors;
import com.oracle.truffle.js.runtime.JSRuntime;
import com.oracle.truffle.js.runtime.objects.Null;

Utility class for interop operations. Provides methods that can be used in Cached annotations of
the TruffleDSL to create interop nodes just for specific specializations.
/**
 * Utility class for interop operations. Provides methods that can be used in Cached annotations of
 * the TruffleDSL to create interop nodes just for specific specializations.
 *
 */
public final class JSInteropUtil {
    private JSInteropUtil() {
        // this class should not be instantiated
    }

    public static long getArraySize(Object foreignObj, InteropLibrary interop, Node originatingNode) {
        try {
            return interop.getArraySize(foreignObj);
        } catch (UnsupportedMessageException e) {
            throw Errors.createTypeErrorInteropException(foreignObj, e, "getArraySize", originatingNode);
        }
    }

    public static Object readMemberOrDefault(Object obj, Object member, Object defaultValue) {
        if (!(member instanceof String)) {
            return defaultValue;
        }
        try {
            return JSRuntime.importValue(InteropLibrary.getFactory().getUncached().readMember(obj, (String) member));
        } catch (UnknownIdentifierException e) {
            return defaultValue;
        } catch (UnsupportedMessageException e) {
            throw Errors.createTypeErrorInteropException(obj, e, "readMember", member, null);
        }
    }

    public static Object readMemberOrDefault(Object obj, Object member, Object defaultValue, InteropLibrary interop, ImportValueNode importValue, Node originatingNode) {
        if (!(member instanceof String)) {
            return defaultValue;
        }
        try {
            return importValue.executeWithTarget(interop.readMember(obj, (String) member));
        } catch (UnknownIdentifierException e) {
            return defaultValue;
        } catch (UnsupportedMessageException e) {
            throw Errors.createTypeErrorInteropException(obj, e, "readMember", member, originatingNode);
        }
    }

    public static Object readArrayElementOrDefault(Object obj, long index, Object defaultValue, InteropLibrary interop, ImportValueNode importValue, Node originatingNode) {
        try {
            return importValue.executeWithTarget(interop.readArrayElement(obj, index));
        } catch (InvalidArrayIndexException e) {
            return defaultValue;
        } catch (UnsupportedMessageException e) {
            throw Errors.createTypeErrorInteropException(obj, e, "readArrayElement", index, originatingNode);
        }
    }

    public static Object readArrayElementOrDefault(Object obj, long index, Object defaultValue) {
        try {
            return JSRuntime.importValue(InteropLibrary.getFactory().getUncached().readArrayElement(obj, index));
        } catch (InvalidArrayIndexException e) {
            return defaultValue;
        } catch (UnsupportedMessageException e) {
            throw Errors.createTypeErrorInteropException(obj, e, "readArrayElement", index, null);
        }
    }

    public static void writeMember(Object obj, Object member, Object value) {
        if (!(member instanceof String)) {
            return;
        }
        try {
            InteropLibrary.getFactory().getUncached().writeMember(obj, (String) member, JSRuntime.exportValue(value));
        } catch (UnsupportedMessageException | UnknownIdentifierException | UnsupportedTypeException e) {
            throw Errors.createTypeErrorInteropException(obj, e, "writeMember", member, null);
        }
    }

    public static void writeMember(Object obj, Object member, Object value, InteropLibrary interop, ExportValueNode exportValue, Node originatingNode) {
        if (!(member instanceof String)) {
            return;
        }
        try {
            interop.writeMember(obj, (String) member, exportValue.execute(value));
        } catch (UnsupportedMessageException | UnknownIdentifierException | UnsupportedTypeException e) {
            throw Errors.createTypeErrorInteropException(obj, e, "writeMember", member, originatingNode);
        }
    }

    public static Object toPrimitiveOrDefault(Object obj, Object defaultValue, InteropLibrary interop, Node originatingNode) {
        if (interop.isNull(obj)) {
            return Null.instance;
        }
        try {
            if (interop.isBoolean(obj)) {
                return interop.asBoolean(obj);
            } else if (interop.isString(obj)) {
                return interop.asString(obj);
            } else if (interop.isNumber(obj)) {
                if (interop.fitsInInt(obj)) {
                    return interop.asInt(obj);
                } else if (interop.fitsInLong(obj)) {
                    return interop.asLong(obj);
                } else if (interop.fitsInDouble(obj)) {
                    return interop.asDouble(obj);
                }
            }
        } catch (UnsupportedMessageException e) {
            throw Errors.createTypeErrorUnboxException(obj, e, originatingNode);
        }
        return defaultValue;
    }

    @TruffleBoundary
    public static List<Object> keys(Object obj) {
        try {
            Object keysObj = InteropLibrary.getFactory().getUncached().getMembers(obj);
            InteropLibrary keysInterop = InteropLibrary.getFactory().getUncached(keysObj);
            long size = keysInterop.getArraySize(keysObj);
            if (size < 0 || size >= Integer.MAX_VALUE) {
                throw Errors.createRangeErrorInvalidArrayLength();
            }
            List<Object> keys = new ArrayList<>((int) size);
            for (int i = 0; i < size; i++) {
                Object key = keysInterop.readArrayElement(keysObj, i);
                assert InteropLibrary.getFactory().getUncached().isString(key);
                keys.add(key);
            }
            return keys;
        } catch (UnsupportedMessageException | InvalidArrayIndexException e) {
            throw Errors.createTypeErrorInteropException(obj, e, "readArrayElement", null);
        }
    }

    @TruffleBoundary
    public static boolean hasProperty(Object obj, Object key) {
        if (key instanceof String) {
            return InteropLibrary.getFactory().getUncached().isMemberExisting(obj, (String) key);
        } else {
            return false;
        }
    }

    @TruffleBoundary
    public static boolean remove(Object obj, Object key) {
        if (key instanceof String) {
            try {
                InteropLibrary.getFactory().getUncached().removeMember(obj, (String) key);
            } catch (UnsupportedMessageException | UnknownIdentifierException e) {
                throw Errors.createTypeErrorInteropException(obj, e, "removeMember", key, null);
            }
            return true;
        } else {
            return false;
        }
    }

    @TruffleBoundary
    public static Object call(Object function, Object[] args) {
        Object[] exportedArgs = JSRuntime.exportValueArray(args);
        try {
            return JSRuntime.importValue(InteropLibrary.getFactory().getUncached().execute(function, exportedArgs));
        } catch (UnsupportedMessageException | UnsupportedTypeException | ArityException e) {
            throw Errors.createTypeErrorInteropException(function, e, "execute", null);
        }
    }

    @TruffleBoundary
    public static Object construct(Object target, Object[] args) {
        Object[] exportedArgs = JSRuntime.exportValueArray(args);
        try {
            return JSRuntime.importValue(InteropLibrary.getFactory().getUncached().instantiate(target, exportedArgs));
        } catch (UnsupportedMessageException | UnsupportedTypeException | ArityException e) {
            throw Errors.createTypeErrorInteropException(target, e, "instantiate", null);
        }
    }
}