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package com.github.fge.avro;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.JsonNodeFactory;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.github.fge.jsonschema.jsonpointer.JsonPointer;
import com.github.fge.jsonschema.util.AsJson;
import com.github.fge.jsonschema.util.JacksonUtils;
import com.github.fge.jsonschema.util.NodeType;
import net.jcip.annotations.NotThreadSafe;

@NotThreadSafe
public final class MutableTree
    implements AsJson
{
    private static final JsonNodeFactory FACTORY = JacksonUtils.nodeFactory();

    private final ObjectNode baseNode = FACTORY.objectNode();

    private JsonPointer pointer = JsonPointer.empty();

    private ObjectNode currentNode = baseNode;

    public void setType(final NodeType type)
    {
        currentNode.put("type", type.toString());
    }

    public ObjectNode getBaseNode()
    {
        return baseNode;
    }

    public ObjectNode getCurrentNode()
    {
        return currentNode;
    }

    public JsonPointer getPointer()
    {
        return pointer;
    }

    public void setPointer(final JsonPointer pointer)
    {
        this.pointer = pointer;
        currentNode = (ObjectNode) pointer.get(baseNode);
    }

    public boolean hasDefinition(final String name)
    {
        boolean ret = true;

        if (!baseNode.has("definitions")) {
            ret = false;
            baseNode.put("definitions", FACTORY.objectNode());
        }

        final ObjectNode definitions = (ObjectNode) baseNode.get("definitions");

        if (!definitions.has(name)) {
            ret = false;
            definitions.put(name, FACTORY.objectNode());
        }

        return ret;
    }

    @Override
    public JsonNode asJson()
    {
        return FACTORY.objectNode().put("pointer", pointer.toString());
    }
}