/*
 * Nextcloud Android client application
 *
 * @author Tobias Kaminsky
 * Copyright (C) 2018 Tobias Kaminsky
 * Copyright (C) 2018 Nextcloud GmbH.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.owncloud.android.files;

import com.owncloud.android.lib.common.OwnCloudClient;
import com.owncloud.android.lib.common.operations.RemoteOperation;
import com.owncloud.android.lib.common.operations.RemoteOperationResult;
import com.owncloud.android.lib.common.utils.Log_OC;

import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.PostMethod;
import org.json.JSONObject;

import java.util.ArrayList;

public class StreamMediaFileOperation extends RemoteOperation {
    private static final String TAG = StreamMediaFileOperation.class.getSimpleName();
    private static final int SYNC_READ_TIMEOUT = 40000;
    private static final int SYNC_CONNECTION_TIMEOUT = 5000;
    private static final String STREAM_MEDIA_URL = "/ocs/v2.php/apps/dav/api/v1/direct";
    
    private String fileID;

    // JSON node names
    private static final String NODE_OCS = "ocs";
    private static final String NODE_DATA = "data";
    private static final String NODE_URL = "url";
    private static final String JSON_FORMAT = "?format=json";

    public StreamMediaFileOperation(String fileID) {
        this.fileID = fileID;
    }

    protected RemoteOperationResult run(OwnCloudClient client) {
        RemoteOperationResult result;
        PostMethod postMethod = null;

        try {
            postMethod = new PostMethod(client.getBaseUri() + STREAM_MEDIA_URL + JSON_FORMAT);
            postMethod.setParameter("fileId", fileID);

            // remote request
            postMethod.addRequestHeader(OCS_API_HEADER, OCS_API_HEADER_VALUE);

            int status = client.executeMethod(postMethod, SYNC_READ_TIMEOUT, SYNC_CONNECTION_TIMEOUT);

            if (status == HttpStatus.SC_OK) {
                String response = postMethod.getResponseBodyAsString();

                // Parse the response
                JSONObject respJSON = new JSONObject(response);
                String url = respJSON.getJSONObject(NODE_OCS).getJSONObject(NODE_DATA).getString(NODE_URL);

                result = new RemoteOperationResult(true, postMethod);
                ArrayList<Object> urlArray = new ArrayList<>();
                urlArray.add(url);
                result.setData(urlArray);
            } else {
                result = new RemoteOperationResult(false, postMethod);
                client.exhaustResponse(postMethod.getResponseBodyAsStream());
            }
        } catch (Exception e) {
            result = new RemoteOperationResult(e);
            Log_OC.e(TAG, "Get stream url for file with id " + fileID + " failed: " + result.getLogMessage(),
                    result.getException());
        } finally {
            if (postMethod != null) {
                postMethod.releaseConnection();
            }
        }
        return result;
    }
}