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package io.hyperfoil.tools.horreum.svc;

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

import org.graalvm.polyglot.Value;
import org.graalvm.polyglot.proxy.ProxyExecutable;
import org.graalvm.polyglot.proxy.ProxyObject;

import com.fasterxml.jackson.databind.node.ObjectNode;

public class ProxyJacksonObject implements ProxyObject {

    public static class InstanceCheck implements ProxyExecutable {

        @Override
        public Object execute(Value... args) {
            if (args.length < 1) {
                return false;
            } else {
                Value obj = args[0];
                return obj.isProxyObject() && obj.asProxyObject() instanceof ProxyJacksonObject
                        || Util.convert(obj) instanceof ObjectNode;
            }
        }
    }

    private ObjectNode node;

    public ProxyJacksonObject(ObjectNode node) {
        this.node = node;
    }

    public ObjectNode getJsonNode() {
        return node;
    }

    @Override
    public Object getMember(String key) {
        Object rtrn = Util.convertFromJson(node.get(key));
        return rtrn;

    }

    @Override
    public Object getMemberKeys() {
        Iterator iter = node.fieldNames();
        List rtrn = new ArrayList<>();
        while (iter.hasNext()) {
            rtrn.add(iter.next());
        }
        return rtrn;
    }

    @Override
    public boolean hasMember(String key) {
        return node.has(key);
    }

    @Override
    public void putMember(String key, Value value) {
        node.put(key, Util.convertToJson(value));
    }

    @Override
    public boolean removeMember(String key) {
        return node.remove(key) != null;
    }

}