/*
 * Copyright 2015-present Open Networking Laboratory
 *
 * Licensed 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.
 */

/*
 ONOS GUI -- Intent View Module
 */

(function () {
    'use strict';

    var dialogId = 'remove-intent-dialog',
        dialogOpts = {
            edge: 'right'
        },
        dropdown;

    angular.module('ovIntent', [])
        .controller('OvIntentCtrl',
        ['$log', '$scope', 'TableBuilderService', 'NavService',
            'TopoOverlayService', 'TopoTrafficService', 'DialogService',

        function ($log, $scope, tbs, ns, tov, tts, ds) {
            $scope.briefTip = 'Switch to brief view';
            $scope.detailTip = 'Switch to detailed view';
            $scope.brief = true;
            $scope.intentState = 'NA';
            $scope.fired = false;
            $scope.showOverlays = false;

            dropdown = d3.select('div.show-intent-btn .dropdown');

            function selCb($event, row) {
                $log.debug('Got a click on:', row);
                var m = /(\d+)\s:\s(.*)/.exec(row.appId),
                    id = m ? m[1] : null,
                    name = m ? m[2] : null;

                $scope.intentData = ($scope.selId && m) ? {
                    appId: id,
                    appName: name,
                    key: row.key
                } : null;

                $scope.intentState = row.state;
                showDropdown(false);
            }

            function respCb() {
                if ($scope.fired) {
                    if ($scope.changedData) {
                        $scope.intentState = $scope.changedData.state;
                    }
                    $scope.fired = false;
                }
            }

            tbs.buildTable({
                scope: $scope,
                tag: 'intent',
                selCb: selCb,
                respCb: respCb,
                idKey: 'key'
            });

            $scope.topoTip = 'Show selected intent on topology view';
            $scope.resubmitTip = 'Resubmit selected intent';
            $scope.deactivateTip = 'Remove selected intent';
            $scope.purgeTip = 'Purge selected intent';
            $scope.purgeAllTip = 'Purge withdrawn intents';


            function showDropdown(b) {
                dropdown.style('display', b ? 'block' : 'none');
            }

            $scope.showIntent = function () {
                var d = $scope.intentData,
                    tovData,
                    ncb;

                if (!d) {
                    // no intent selected - nothing to do
                    return;
                }

                function setOvAndNavigate(info) {
                    d.overlayId = info.id;
                    ns.navTo('topo', d);
                }

                function clickMe(data) {
                    showDropdown(false);
                    setOvAndNavigate(data);
                }

                function setUpSelection(tovData) {
                    dropdown.text(null);

                    tovData.forEach(function (data) {
                        var div = dropdown.append('div');
                        div.classed('overlay-choice', true);
                        div.text(data.tt);
                        div.on('click', function () {
                            clickMe(data);
                        });
                    });

                    showDropdown(true);
                }

                tovData = tov.listOverlaysThatShowIntents();
                ncb = tovData.length;
                // NOTE: ncb should be at least 1, (traffic overlay)

                if (ncb === 1) {
                    setOvAndNavigate(tovData[0]);

                } else if (ncb > 1) {
                    // let the user choose which overlay to invoke...
                    setUpSelection(tovData);

                } else {
                    $log.error('Internal Error - no overlay configured',
                    'to show selected intent on topology view');
                }
            };


            // TODO: clean up the following code...

            $scope.isIntentInstalled = function () {
                return $scope.intentState === 'Installed';
            };

            $scope.isIntentWithdrawn = function () {
                return $scope.intentState === 'Withdrawn';
            };

            $scope.isHavingWithdrawn = function () {
                var isWithdrawn = false;
                $scope.tableData.forEach(function (intent) {
                    if (intent.state ==='Withdrawn') {
                        isWithdrawn = true;
                    }
                });
                return isWithdrawn;
            };

            function executeAction(action) {
                var content = ds.createDiv(),
                    txt,
                    bPurge = action === 'purge';

                $scope.intentData.intentPurge = bPurge;

                content.append('p').
                        text('Are you sure you want to '+ action +
                        ' the selected intent?');

                function dOk() {
                    var d = $scope.intentData;
                    $log.debug(d);
                    d && (action === 'resubmit' ? tts.resubmitIntent(d) :
                                    tts.removeIntent(d));
                    $scope.fired = true;
                }

                function dCancel() {
                    ds.closeDialog();
                    $log.debug('Canceling remove-intent action');
                }

                ds.openDialog(dialogId, dialogOpts)
                    .setTitle('Confirm Action')
                    .addContent(content)
                    .addOk(dOk)
                    .addCancel(dCancel)
                    .bindKeys();
            }
            function executeActions(action) {
                 var content = ds.createDiv(),
                     txt='purgeIntents';
                     content.append('p').
                     text('Are you sure you want to purge all the withdrawn intents?');

                 function dOk() {
                     tts.removeIntents();
                     $scope.fired = true;
                 }

                 function dCancel() {
                     ds.closeDialog();
                     $log.debug('Canceling remove-intents action');
                 }

                 ds.openDialog(dialogId, dialogOpts)
                 .setTitle('Confirm Action')
                 .addContent(content)
                 .addOk(dOk)
                 .addCancel(dCancel)
                 .bindKeys();
            }

            $scope.deactivateIntent = function () {
                executeAction("withdraw");
            };

            $scope.resubmitIntent = function () {
                executeAction("resubmit");
            };

            $scope.purgeIntent = function () {
                executeAction("purge");
            };

            $scope.briefToggle = function () {
                $scope.brief = !$scope.brief;
            };

            $scope.$on('$destroy', function () {
                ds.closeDialog();
                $log.debug('OvIntentCtrl has been destroyed');
            });

            $scope.purgeIntents = function () {
                executeActions("purgeIntents");
            };
            $log.debug('OvIntentCtrl has been created');
        }]);
}());