/*******************************************************************************
 *
 * Copyright (c) 2010-2011 Sonatype, Inc.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *
 *
 *
 *
 *******************************************************************************/ 

package org.hudsonci.utils.hamcrest;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.SocketTimeoutException;
import java.net.URL;

import org.hamcrest.Description;
import org.hamcrest.TypeSafeMatcher;

public class URLRespondsWithStatusMatcher extends TypeSafeMatcher<URL> {

    private int statusCode = -2; // since -1 means the response was non-http-valid
    private int timeout = 0; // negative timeout would throw iae, default infinite
    private int receivedStatusCode = 0;
    private boolean timedOut = false;
    private Exception e;
    private String urlString;

    public URLRespondsWithStatusMatcher(final int statusCode) {
        this(statusCode, 0);
    }

    public URLRespondsWithStatusMatcher(final int statusCode, final int timeout) {
        if (timeout < 0) {
            throw new IllegalArgumentException("timeout cannot be negative");
        }
        if (statusCode < -1) {
            throw new IllegalArgumentException("status code cannot be less than negative one");
        }
        this.statusCode = statusCode;
        this.timeout = timeout;
    }

    public void describeTo(Description description) {
        if (timedOut) {
            description.appendValue(urlString).appendText(" to connect within ").appendValue(timeout).appendText("ms");
        } else if (e != null) {
            description.appendValue(urlString).appendText(" to successfully connect");
        } else {
            description.appendValue(urlString).appendText(" to respond with ").appendValue(statusCode);
        }
    }

    @Override
    protected void describeMismatchSafely(URL item, Description mismatchDescription) {
        if (timedOut) {
            mismatchDescription.appendText("took longer.");
            if (this.e != null) {
                mismatchDescription.appendText(this.e.getMessage());
            }
        } else if (e != null) {
            mismatchDescription.appendText("got ").appendValue(this.e);
            // description.appendText("got exception ").appendValue(e);
        } else {
            mismatchDescription.appendText("was ").appendValue(receivedStatusCode);
        }

    }

    @Override
    protected boolean matchesSafely(URL item) {
        this.urlString = item.toString();
        try {
            URL url = new URL(item.toString());
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            if (timeout > -1) {
                urlConnection.setConnectTimeout(timeout);
                urlConnection.setReadTimeout(timeout);
            }
            urlConnection.setUseCaches(false);
            urlConnection.connect();
            this.receivedStatusCode = urlConnection.getResponseCode();
        } catch (SocketTimeoutException ste) {
            timedOut = true;
            this.e = ste;
        } catch (IOException ioe) {
            this.e = ioe;
        } catch (Exception e) {
            this.e = e;
        }
        return (!timedOut && e == null && this.receivedStatusCode == this.statusCode);

    }
}