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ArangoDB Java Driver
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/*
 * DISCLAIMER
 *
 * Copyright 2016 ArangoDB GmbH, Cologne, Germany
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright holder is ArangoDB GmbH, Cologne, Germany
 */

package com.arangodb.internal;

import java.util.Collection;

import com.arangodb.entity.EdgeDefinition;
import com.arangodb.entity.GraphEntity;
import com.arangodb.internal.ArangoExecutor.ResponseDeserializer;
import com.arangodb.model.OptionsBuilder;
import com.arangodb.model.VertexCollectionCreateOptions;
import com.arangodb.velocypack.Type;
import com.arangodb.velocypack.exception.VPackException;
import com.arangodb.velocystream.Request;
import com.arangodb.velocystream.RequestType;
import com.arangodb.velocystream.Response;

/**
 * @author Mark Vollmary
 *
 */
public abstract class InternalArangoGraph, D extends InternalArangoDatabase, E extends ArangoExecutor>
		extends ArangoExecuteable {

	protected static final String PATH_API_GHARIAL = "/_api/gharial";
	private static final String GRAPH = "graph";
	private static final String VERTEX = "vertex";
	private static final String EDGE = "edge";

	private final D db;
	private final String name;

	protected InternalArangoGraph(final D db, final String name) {
		super(db.executor, db.util, db.context);
		this.db = db;
		this.name = name;
	}

	public D db() {
		return db;
	}

	public String name() {
		return name;
	}

	protected Request dropRequest() {
		return dropRequest(false);
	}

	protected Request dropRequest(final boolean dropCollections) {
		final Request request = request(db.name(), RequestType.DELETE, PATH_API_GHARIAL, name);
		if (dropCollections) {
			request.putQueryParam("dropCollections", dropCollections);
		}
		return request;
	}

	protected Request getInfoRequest() {
		return request(db.name(), RequestType.GET, PATH_API_GHARIAL, name);
	}

	protected ResponseDeserializer getInfoResponseDeserializer() {
		return addVertexCollectionResponseDeserializer();
	}

	protected Request getVertexCollectionsRequest() {
		return request(db.name(), RequestType.GET, PATH_API_GHARIAL, name, VERTEX);
	}

	protected ResponseDeserializer> getVertexCollectionsResponseDeserializer() {
		return new ResponseDeserializer>() {
			@Override
			public Collection deserialize(final Response response) throws VPackException {
				return util().deserialize(response.getBody().get("collections"), new Type>() {
				}.getType());
			}
		};
	}

	protected Request addVertexCollectionRequest(final String name) {
		final Request request = request(db.name(), RequestType.POST, PATH_API_GHARIAL, name(), VERTEX);
		request.setBody(util().serialize(OptionsBuilder.build(new VertexCollectionCreateOptions(), name)));
		return request;
	}

	protected ResponseDeserializer addVertexCollectionResponseDeserializer() {
		return addEdgeDefinitionResponseDeserializer();
	}

	protected Request getEdgeDefinitionsRequest() {
		return request(db.name(), RequestType.GET, PATH_API_GHARIAL, name, EDGE);
	}

	protected ResponseDeserializer> getEdgeDefinitionsDeserializer() {
		return new ResponseDeserializer>() {
			@Override
			public Collection deserialize(final Response response) throws VPackException {
				return util().deserialize(response.getBody().get("collections"), new Type>() {
				}.getType());
			}
		};
	}

	protected Request addEdgeDefinitionRequest(final EdgeDefinition definition) {
		final Request request = request(db.name(), RequestType.POST, PATH_API_GHARIAL, name, EDGE);
		request.setBody(util().serialize(definition));
		return request;
	}

	protected ResponseDeserializer addEdgeDefinitionResponseDeserializer() {
		return new ResponseDeserializer() {
			@Override
			public GraphEntity deserialize(final Response response) throws VPackException {
				return util().deserialize(response.getBody().get(GRAPH), GraphEntity.class);
			}
		};
	}

	protected Request replaceEdgeDefinitionRequest(final EdgeDefinition definition) {
		final Request request = request(db.name(), RequestType.PUT, PATH_API_GHARIAL, name, EDGE,
			definition.getCollection());
		request.setBody(util().serialize(definition));
		return request;
	}

	protected ResponseDeserializer replaceEdgeDefinitionResponseDeserializer() {
		return new ResponseDeserializer() {
			@Override
			public GraphEntity deserialize(final Response response) throws VPackException {
				return util().deserialize(response.getBody().get(GRAPH), GraphEntity.class);
			}
		};
	}

	protected Request removeEdgeDefinitionRequest(final String definitionName) {
		return request(db.name(), RequestType.DELETE, PATH_API_GHARIAL, name, EDGE, definitionName);
	}

	protected ResponseDeserializer removeEdgeDefinitionResponseDeserializer() {
		return new ResponseDeserializer() {
			@Override
			public GraphEntity deserialize(final Response response) throws VPackException {
				return util().deserialize(response.getBody().get(GRAPH), GraphEntity.class);
			}
		};
	}

}