/*
 * Copyright (C) 2014 Glyptodon LLC
 *
 * 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 DEALINGS IN
 * THE SOFTWARE.
 */

/**
 * The controller for editing or creating connections.
 */
angular.module('manage').controller('manageConnectionController', ['$scope', '$injector',
        function manageConnectionController($scope, $injector) {

    // Required types
    var Connection          = $injector.get('Connection');
    var ConnectionGroup     = $injector.get('ConnectionGroup');
    var HistoryEntryWrapper = $injector.get('HistoryEntryWrapper');
    var PermissionSet       = $injector.get('PermissionSet');

    // Required services
    var $location              = $injector.get('$location');
    var $routeParams           = $injector.get('$routeParams');
    var connectionService      = $injector.get('connectionService');
    var connectionGroupService = $injector.get('connectionGroupService');
    var protocolService        = $injector.get('protocolService');

    /**
     * An action to be provided along with the object sent to showStatus which
     * closes the currently-shown status dialog.
     */
    var ACKNOWLEDGE_ACTION = {
        name        : "manage.error.action.acknowledge",
        // Handle action
        callback    : function acknowledgeCallback() {
            $scope.showStatus(false);
        }
    };

    /**
     * The identifier of the connection being edited. If a new connection is
     * being created, this will not be defined.
     *
     * @type String
     */
    var identifier = $routeParams.id;

    // Pull connection group hierarchy
    connectionGroupService.getConnectionGroupTree(ConnectionGroup.ROOT_IDENTIFIER, PermissionSet.ObjectPermissionType.UPDATE)
    .success(function connectionGroupReceived(rootGroup) {
        $scope.rootGroup = rootGroup;
    });
   
    // Get protocol metadata
    protocolService.getProtocols().success(function protocolsReceived(protocols) {
        $scope.protocols = protocols;
    });
   
    // If we are editing an existing connection, pull its data
    if (identifier) {

        // Pull data from existing connection
        connectionService.getConnection(identifier).success(function connectionRetrieved(connection) {
            $scope.connection = connection;
        });

        // Pull connection history
        connectionService.getConnectionHistory(identifier).success(function historyReceived(historyEntries) {

            // Wrap all history entries for sake of display
            $scope.historyEntryWrappers = [];
            historyEntries.forEach(function wrapHistoryEntry(historyEntry) {
               $scope.historyEntryWrappers.push(new HistoryEntryWrapper(historyEntry)); 
            });

        });

        // Pull connection parameters
        connectionService.getConnectionParameters(identifier).success(function parametersReceived(parameters) {
            $scope.parameters = parameters;
        });

    }

    // If we are creating a new connection, populate skeleton connection data
    else {
        $scope.connection = new Connection({ protocol: 'vnc' });
        $scope.historyEntryWrappers = [];
        $scope.parameters = {};
    }

    /**
     * Cancels all pending edits, returning to the management page.
     */
    $scope.cancel = function cancel() {
        $location.path('/manage/');
    };
            
    /**
     * Saves the connection, creating a new connection or updating the existing
     * connection.
     */
    $scope.saveConnection = function saveConnection() {

        $scope.connection.parameters = $scope.parameters;

        // Save the connection
        connectionService.saveConnection($scope.connection)
        .success(function savedConnection() {
            $location.path('/manage/');
        })

        // Notify of any errors
        .error(function connectionSaveFailed(error) {
            $scope.showStatus({
                'className'  : 'error',
                'title'      : 'manage.error.title',
                'text'       : error.message,
                'actions'    : [ ACKNOWLEDGE_ACTION ]
            });
        });

    };
    
    /**
     * An action to be provided along with the object sent to showStatus which
     * immediately deletes the current connection.
     */
    var DELETE_ACTION = {
        name        : "manage.edit.connection.delete",
        className   : "danger",
        // Handle action
        callback    : function deleteCallback() {
            deleteConnectionImmediately();
            $scope.showStatus(false);
        }
    };

    /**
     * An action to be provided along with the object sent to showStatus which
     * closes the currently-shown status dialog.
     */
    var CANCEL_ACTION = {
        name        : "manage.edit.connection.cancel",
        // Handle action
        callback    : function cancelCallback() {
            $scope.showStatus(false);
        }
    };

    /**
     * Immediately deletes the current connection, without prompting the user
     * for confirmation.
     */
    var deleteConnectionImmediately = function deleteConnectionImmediately() {

        // Delete the connection
        connectionService.deleteConnection($scope.connection)
        .success(function deletedConnection() {
            $location.path('/manage/');
        })

        // Notify of any errors
        .error(function connectionDeletionFailed(error) {
            $scope.showStatus({
                'className'  : 'error',
                'title'      : 'manage.error.title',
                'text'       : error.message,
                'actions'    : [ ACKNOWLEDGE_ACTION ]
            });
        });

    };

    /**
     * Deletes the connection, prompting the user first to confirm that
     * deletion is desired.
     */
    $scope.deleteConnection = function deleteConnection() {

        // Confirm deletion request
        $scope.showStatus({
            'title'      : 'manage.edit.connection.confirmDelete.title',
            'text'       : 'manage.edit.connection.confirmDelete.text',
            'actions'    : [ DELETE_ACTION, CANCEL_ACTION]
        });

    };

}]);