/*
 * © Copyright IBM Corp. 2012
 * 
 * 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.
 */

package com.ibm.sbt.services.client;

import java.io.IOException;
import java.net.URI;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.util.EntityUtils;

import com.ibm.commons.util.AbstractException;
import com.ibm.commons.util.StringUtil;
import com.ibm.sbt.services.client.ClientService.HandlerRaw;

/**
 * REST services related exception.
 * 
 * @author Philippe Riand
 */
public class ClientServicesException extends AbstractException {

	private int responseStatusCode;
	private String reasonPhrase;
	private URI requestURI;
	private String responseBody;
	private HttpResponse response;
	private HttpRequestBase request;


	// TODO fill more response code from rfc2616, section 10
	public static final int	BAD_REQUEST						= 400;
	public static final int	UNAUTHORIZED					= 401;
	public static final int	PAYMENT_REQURED					= 402;
	public static final int	FORBIDDEN						= 403;
	public static final int	NOT_FOUND						= 404;
	public static final int	METHOD_NOT_ALLOWED				= 405;
	public static final int	NOT_ACCEPTABLE					= 406;
	public static final int	PROXY_AUTHENTICATION_REQUIRED	= 407;
	public static final int	REQUEST_TIMEOUT					= 408;
	public static final int	CONFLICT						= 409;
	public static final int	GONE							= 410;
	public static final int	LENGTH_REQUIRED					= 411;
	public static final int	PRECONDITION_FAILED				= 412;
	public static final int	REQUEST_URI_TOO_LONG			= 413;
	public static final int	REQUEST_ENTITY_TOO_LARGE		= 414;
	public static final int	UNSUPPORTED_MEDIA_TYPE			= 415;
	public static final int	REQUEST_RANGE_NOT_SATISFIABLE	= 416;
	public static final int	EXPECTATION_FAILED				= 416;

	private static final long	serialVersionUID	= 1L;

	public ClientServicesException(Throwable nextException) {
		super(nextException);
	}

	public ClientServicesException(Throwable nextException, String msg, Object... params) {
		super(nextException, msg, params);
	}

	public ClientServicesException(Response response) {
		this(response.getResponse(), response.getRequest());
	}
	
	public ClientServicesException(HttpResponse response, HttpRequestBase request) {
		this(null, createMessage(request, response));
		
		this.response = response;
		this.request = request;
		
		this.setResponseStatusCode(response.getStatusLine().getStatusCode());
		this.setReasonPhrase(response.getStatusLine().getReasonPhrase());
		this.setRequestURI(request.getURI());
		
		try {
			HttpEntity entity = response.getEntity();
			this.responseBody = EntityUtils.toString(entity, "UTF-8");
		} catch (IOException ioe) {
		}
	}
	
	/**
	 * @return the request
	 */
	public HttpRequestBase getRequest() {
		return request;
	}
	
	/**
	 * @return the response
	 */
	public HttpResponse getResponse() {
		return response;
	}
	
	/**
	 * @return the responseBody
	 */
	public String getResponseBody() {
		return responseBody;
	}

	public String getReasonPhrase() {
		return reasonPhrase;
	}

	public void setResponseStatusCode(int responseStatusCode) {
		this.responseStatusCode = responseStatusCode;
	}

	public void setRequestURI(URI requestURI) {
		this.requestURI = requestURI;
	}

	public void setReasonPhrase(String reasonPhrase) {
		this.reasonPhrase = reasonPhrase;
	}

	public int getResponseStatusCode() {
		return responseStatusCode;
	}

	public URI getRequestURI() {
		return requestURI;
	}

	public boolean isInformational() {
		return responseStatusCode > 99 && responseStatusCode < 200;
	}

	public boolean isSuccesful() {
		return responseStatusCode > 199 && responseStatusCode < 300;
	}

	public boolean isRedirection() {
		return responseStatusCode > 299 && responseStatusCode < 400;
	}

	public boolean isClientError() {
		return responseStatusCode > 399 && responseStatusCode < 500;
	}

	public boolean isServerError() {
		return responseStatusCode > 499 && responseStatusCode < 600;
	}
	
	static private String createMessage(HttpRequestBase request, HttpResponse response) {
		String msg = null;
		int statusCode = response.getStatusLine().getStatusCode();
		String reasonPhrase = response.getStatusLine().getReasonPhrase();
		URI requestUri = request.getURI();
		try {
			HandlerRaw handler = new HandlerRaw();
			Object data = handler.parseContent(request, response, response.getEntity());
			msg = "Request to url {0} returned an error response {1}:{2} {3}";
			msg = StringUtil.format(msg, requestUri, statusCode, reasonPhrase, data);
		} catch (Exception e) {
			msg = "Request to url {0} returned an error response {1}:{2}";
			msg = StringUtil.format(msg, requestUri, statusCode, reasonPhrase);
		}	
		return msg;
	}

}