/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 *
*/

var exec = require('cordova/exec'),
    FileTransferError = require('cordova/plugin/FileTransferError');

// Note that the only difference between this and the default implementation is the
// object literal passed to exec() in upload - jm

/**
 * FileTransfer uploads a file to a remote server.
 * @constructor
 */
var FileTransfer = function() {};

/**
* Given an absolute file path, uploads a file on the device to a remote server
* using a multipart HTTP request.
* @param filePath {String}           Full path of the file on the device
* @param server {String}             URL of the server to receive the file
* @param successCallback (Function}  Callback to be invoked when upload has completed
* @param errorCallback {Function}    Callback to be invoked upon error
* @param options {FileUploadOptions} Optional parameters such as file name and mimetype
* @param trustAllHosts {Boolean} Optional trust all hosts (e.g. for self-signed certs), defaults to false
*/

FileTransfer.prototype.upload = function(filePath, server, successCallback, errorCallback, options, trustAllHosts) {

    // sanity parameter checking
    if (!filePath || !server) throw new Error("FileTransfer.upload requires filePath and server URL parameters at the minimum.");
    // check for options
    var fileKey = null;
    var fileName = null;
    var mimeType = null;
    var params = null;
    var chunkedMode = true;

    if (options) {
        fileKey = options.fileKey;
        fileName = options.fileName;
        mimeType = options.mimeType;
        if (options.chunkedMode !== null || typeof options.chunkedMode != "undefined") {
            chunkedMode = options.chunkedMode;
        }

        // if options are specified, and NOT a string already, we will stringify it.
        if(options.params && typeof options.params != typeof "") {
            var arrParams = [];
            for(var v in options.params) {
                arrParams.push(v + "=" + options.params[v]);
            }
            params = encodeURI(arrParams.join("&"));
        }
    }

    var fail = function(e) {
        var error = new FileTransferError(e.code, e.source, e.target, e.http_status);
        errorCallback(error);
    };
    exec(successCallback, fail, 'FileTransfer', 'upload', [{"filePath":filePath,
                                                              "server":server,
                                                              "fileKey":fileKey,
                                                              "fileName":fileName,
                                                              "mimeType":mimeType,
                                                              "params":params,
                                                              "trustAllHosts":trustAllHosts,
                                                              "chunkedMode":chunkedMode}]);
};

/**
 * Downloads a file form a given URL and saves it to the specified directory.
 * @param source {String}          URL of the server to receive the file
 * @param target {String}         Full path of the file on the device
 * @param successCallback (Function}  Callback to be invoked when upload has completed
 * @param errorCallback {Function}    Callback to be invoked upon error
 */

FileTransfer.prototype.download = function(source, target, successCallback, errorCallback) {
    // sanity parameter checking
    if (!source || !target) throw new Error("FileTransfer.download requires source URI and target URI parameters at the minimum.");
    var win = function(result) {
        var entry = null;
        if (result.isDirectory) {
            entry = new (require('cordova/plugin/DirectoryEntry'))();
        }
        else if (result.isFile) {
            entry = new (require('cordova/plugin/FileEntry'))();
        }
        entry.isDirectory = result.isDirectory;
        entry.isFile = result.isFile;
        entry.name = result.name;
        entry.fullPath = result.fullPath;
        successCallback(entry);
    };

    var fail = function(e) {
        var error = new FileTransferError(e.code, e.source, e.target, e.http_status);
        errorCallback(error);
    };

    exec(win, errorCallback, 'FileTransfer', 'download', [source, target]);
};


module.exports = FileTransfer;