/*-
 * ============LICENSE_START=======================================================
 * org.openecomp.aai
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.aai.parsers.uri;

import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;

import javax.ws.rs.core.MultivaluedMap;

import org.openecomp.aai.exceptions.AAIException;
import org.openecomp.aai.introspection.Introspector;
import org.openecomp.aai.introspection.Loader;
import org.openecomp.aai.restcore.HttpMethod;
import com.google.common.base.CaseFormat;
import com.google.common.base.Joiner;

/**
 * The Class URIToExtensionInformation.
 */
public class URIToExtensionInformation implements Parsable {

	private String namespace = "";
	
	private String methodName = "";
	
	private String topObject = "";
	
	private List<String> pieces = null;
	
	/**
	 * Instantiates a new URI to extension information.
	 *
	 * @param loader the loader
	 * @param uri the uri
	 * @throws IllegalArgumentException the illegal argument exception
	 * @throws AAIException the AAI exception
	 * @throws UnsupportedEncodingException the unsupported encoding exception
	 */
	public URIToExtensionInformation(Loader loader, URI uri) throws IllegalArgumentException, AAIException, UnsupportedEncodingException {
		pieces = new ArrayList<>();
		URIParser parser = new URIParser(loader, uri);
		parser.parse(this);
		
		this.methodName = Joiner.on("").join(this.pieces);
	}
	
	/**
	 * @{inheritDoc}
	 */
	@Override
	public void processObject(Introspector obj, MultivaluedMap<String, String> uriKeys) {
		String upperCamel = toUpperCamel(obj.getDbName());
		if (topObject.equals("")) {
			topObject = upperCamel;
		}
		pieces.add(upperCamel);

	}

	/**
	 * @{inheritDoc}
	 */
	@Override
	public void processContainer(Introspector obj, MultivaluedMap<String, String> uriKeys, boolean isFinalContainer) {
		pieces.add(toUpperCamel(obj.getName()));
	}
	
	/**
	 * @{inheritDoc}
	 */
	@Override
	public void processNamespace(Introspector obj) {
		this.namespace = CaseFormat.LOWER_HYPHEN.to(CaseFormat.LOWER_CAMEL, obj.getDbName());
		pieces.add(toUpperCamel(obj.getDbName()));

	}

	/**
	 * @{inheritDoc}
	 */
	@Override
	public String getCloudRegionTransform() {
		return "remove";
	}
	
	/**
	 * @{inheritDoc}
	 */
	@Override
	public boolean useOriginalLoader() {
		return true;
	}
	
	/**
	 * Gets the namespace.
	 *
	 * @return the namespace
	 */
	public String getNamespace() {
		return this.namespace;
	}
	
	/**
	 * Gets the top object.
	 *
	 * @return the top object
	 */
	public String getTopObject() {
		return this.topObject;
	}
	
	/**
	 * Gets the method name.
	 *
	 * @param httpMethod the http method
	 * @param isPreprocess the is preprocess
	 * @return the method name
	 */
	public String getMethodName(HttpMethod httpMethod, boolean isPreprocess) {
		String result = "Dynamic";
		if (httpMethod.equals(HttpMethod.PUT)) {
			result += "Add";
		} else if (httpMethod.equals(HttpMethod.DELETE)) {
			result += "Del";
		} else {
			throw new IllegalArgumentException("http method not supported: " + httpMethod);
		}
		result += this.methodName;
		
		if (isPreprocess) {
			result += "PreProc";
		} else {
			result += "PostProc";
		}
		return result;
	}

	/**
	 * To upper camel.
	 *
	 * @param name the name
	 * @return the string
	 */
	private String toUpperCamel(String name) {
		String result = "";
		result = CaseFormat.LOWER_HYPHEN.to(CaseFormat.UPPER_CAMEL, name);
		return result;
	}
}