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/**
 * Copyright (C) 2014 Couchbase, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
 * IN THE SOFTWARE.
 */
package com.couchbase.client.core.config.refresher;

import com.couchbase.client.core.ClusterFacade;
import com.couchbase.client.core.config.BucketConfig;
import com.couchbase.client.core.config.ClusterConfig;
import com.couchbase.client.core.config.ConfigurationException;
import com.couchbase.client.core.message.config.BucketStreamingRequest;
import com.couchbase.client.core.message.config.BucketStreamingResponse;
import rx.Observable;
import rx.functions.Action1;
import rx.functions.Func1;

/**
 * Keeps the bucket config fresh through a HTTP streaming connection.
 *
 * @author Michael Nitschinger
 * @since 1.0
 */
public class HttpRefresher extends AbstractRefresher {

    private static final String TERSE_PATH = "/pools/default/bs/";
    private static final String VERBOSE_PATH = "/pools/default/bucketsStreaming/";

    public HttpRefresher(final ClusterFacade cluster) {
        super(cluster);
    }

    @Override
    public Observable registerBucket(final String name, final String password) {
        return super.registerBucket(name, password).flatMap(new Func1>() {
            @Override
            public Observable call(Boolean aBoolean) {
                return cluster()
                    .send(new BucketStreamingRequest(TERSE_PATH, name, password))
                    .doOnNext(new Action1() {
                        @Override
                        public void call(BucketStreamingResponse response) {
                            if (!response.status().isSuccess()) {
                                throw new ConfigurationException("Could not load terse config.");
                            }
                        }
                    });
            }
        }).onErrorResumeNext(new Func1>() {
            @Override
            public Observable call(Throwable throwable) {
                return cluster()
                    .send(new BucketStreamingRequest(VERBOSE_PATH, name, password))
                    .doOnNext(new Action1() {
                        @Override
                        public void call(BucketStreamingResponse response) {
                            if (!response.status().isSuccess()) {
                                throw new ConfigurationException("Could not load terse config.");
                            }
                        }
                    });
            }
        })
            .map(new Func1() {
                @Override
                public Boolean call(final BucketStreamingResponse response) {
                    response
                        .configs()
                        .map(new Func1() {
                            @Override
                            public String call(String s) {
                                return s.replace("$HOST", response.host());
                            }
                        })
                        .subscribe(new Action1() {
                            @Override
                            public void call(final String rawConfig) {
                                pushConfig(rawConfig);
                        }
                    });
                return true;
            }
        });
    }

    @Override
    public Observable shutdown() {
        return null;
    }

    @Override
    public void markTainted(BucketConfig config) {

    }

    @Override
    public void markUntainted(BucketConfig config) {

    }

    @Override
    public void refresh(ClusterConfig config) {
    }
}