'use strict';

/* global $, angular, TASK_TYPES, SECRET_PLACEHOLDER, STORAGE_PROVIDERS, BACKUP_FORMATS, APP_TYPES */
/* global REGIONS_S3, REGIONS_WASABI, REGIONS_DIGITALOCEAN, REGIONS_EXOSCALE, REGIONS_SCALEWAY, REGIONS_LINODE, REGIONS_OVH, REGIONS_IONOS, REGIONS_UPCLOUD, REGIONS_VULTR , REGIONS_CONTABO, REGIONS_HETZNER */
/* global async, ERROR */

angular.module('Application').controller('BackupsController', ['$scope', '$location', '$rootScope', '$timeout', 'Client', function ($scope, $location, $rootScope, $timeout, Client) {
    Client.onReady(function () { if (!Client.getUserInfo().isAtLeastAdmin) $location.path('/'); });

    $scope.SECRET_PLACEHOLDER = SECRET_PLACEHOLDER;
    $scope.MIN_MEMORY_LIMIT = 1024 * 1024 * 1024; // 1 GB
    $scope.MAX_MEMORY_LIMIT = $scope.MIN_MEMORY_LIMIT; // set later

    $scope.config = Client.getConfig();
    $scope.user = Client.getUserInfo();
    $scope.memory = null; // { memory, swap }
    $scope.mountStatus = null; // { state, message }
    $scope.manualBackupApps = [];
    $scope.currentTimeZone = '';

    $scope.backupConfig = {};
    $scope.backups = [];
    $scope.backupTasks = [];
    $scope.cleanupTasks = [];

    $scope.domains = [];

    $scope.s3Regions = REGIONS_S3;
    $scope.wasabiRegions = REGIONS_WASABI;
    $scope.doSpacesRegions = REGIONS_DIGITALOCEAN;
    $scope.exoscaleSosRegions = REGIONS_EXOSCALE;
    $scope.scalewayRegions = REGIONS_SCALEWAY;
    $scope.linodeRegions = REGIONS_LINODE;
    $scope.ovhRegions = REGIONS_OVH;
    $scope.ionosRegions = REGIONS_IONOS;
    $scope.upcloudRegions = REGIONS_UPCLOUD;
    $scope.vultrRegions = REGIONS_VULTR;
    $scope.contaboRegions = REGIONS_CONTABO;
    $scope.hetznerRegions = REGIONS_HETZNER;

    $scope.storageProviders = STORAGE_PROVIDERS.concat([
        { name: 'No-op (Only for testing)', value: 'noop' }
    ]);

    $scope.backupRetentions = [
        { name: '2 days', value: { keepWithinSecs: 2 * 24 * 60 * 60 }},
        { name: '1 week', value: { keepWithinSecs: 7 * 24 * 60 * 60 }}, // default
        { name: '1 month', value: { keepWithinSecs: 30 * 24 * 60 * 60 }},
        { name: '3 months', value: { keepWithinSecs: 3 * 30 * 24 * 60 * 60 }},
        { name: '2 daily, 4 weekly', value: { keepDaily: 2, keepWeekly: 4 }},
        { name: '3 daily, 4 weekly, 6 monthly', value: { keepDaily: 3, keepWeekly: 4, keepMonthly: 6 }},
        { name: '7 daily, 4 weekly, 12 monthly', value: { keepDaily: 7, keepWeekly: 4, keepMonthly: 12 }},
        { name: 'Forever', value: { keepWithinSecs: -1 }}
    ];

    // values correspond to cron days
    $scope.cronDays = [
        { name: 'Sunday', value: 0 },
        { name: 'Monday', value: 1 },
        { name: 'Tuesday', value: 2 },
        { name: 'Wednesday', value: 3 },
        { name: 'Thursday', value: 4 },
        { name: 'Friday', value: 5 },
        { name: 'Saturday', value: 6 },
    ];

    // generates 24h time sets (instead of american 12h) to avoid having to translate everything to locales eg. 12:00
    $scope.cronHours = Array.from({ length: 24 }).map(function (v, i) { return { name: (i < 10 ? '0' : '') + i + ':00', value: i }; });

    $scope.formats = BACKUP_FORMATS;

    $scope.prettyProviderName = function (provider) {
        switch (provider) {
        case 'caas': return 'Managed Cloudron';
        default: return provider;
        }
    };

    $scope.prettyBackupSchedule = function (pattern) {
        if (!pattern) return '';
        var tmp = pattern.split(' ');
        var hours = tmp[2].split(','), days = tmp[5].split(',');
        var prettyDay;
        if (days.length === 7 || days[0] === '*') {
            prettyDay = 'Everyday';
        } else  {
            prettyDay = days.map(function (day) { return $scope.cronDays[parseInt(day, 10)].name.substr(0, 3); }).join(',');
        }

        var prettyHour = hours.map(function (hour) { return $scope.cronHours[parseInt(hour, 10)].name; }).join(',');

        return prettyDay + ' at ' + prettyHour;
    };

    $scope.prettyBackupRetention = function (retention) {
        var tmp = $scope.backupRetentions.find(function (p) { return angular.equals(p.value, retention); });
        return tmp ? tmp.name : '';
    };

    $scope.remount = {
        busy: false,
        error: null,

        submit: function () {
            if (!$scope.mountlike($scope.backupConfig.provider)) return;

            $scope.remount.busy = true;
            $scope.remount.error = null;

            Client.remountBackupStorage(function (error) {
                if (error) {
                    console.error('Failed to remount backup storage.', error);
                    $scope.remount.error = error.message;
                }

                // give the backend some time
                $timeout(function () {
                    $scope.remount.busy = false;
                    getBackupConfig();
                }, 2000);
            });
        }
    };

    $scope.createBackup = {
        busy: false,
        percent: 0,
        message: '',
        errorMessage: '',
        taskId: '',

        init: function () {
            Client.getLatestTaskByType(TASK_TYPES.TASK_BACKUP, function (error, task) {
                if (error) return console.error(error);

                if (!task) return;

                $scope.createBackup.taskId = task.id;
                $scope.createBackup.updateStatus();
            });
        },

        updateStatus: function () {
            Client.getTask($scope.createBackup.taskId, function (error, data) {
                if (error) return window.setTimeout($scope.createBackup.updateStatus, 5000);

                if (!data.active) {
                    $scope.createBackup.busy = false;
                    $scope.createBackup.message = '';
                    $scope.createBackup.percent = 100; // indicates that 'result' is valid
                    $scope.createBackup.errorMessage = data.success ? '' : data.error.message;

                    getBackupTasks();

                    return fetchBackups();
                }

                $scope.createBackup.busy = true;
                $scope.createBackup.percent = data.percent;
                $scope.createBackup.message = data.message;
                window.setTimeout($scope.createBackup.updateStatus, 3000);
            });
        },

        startBackup: function () {
            $scope.createBackup.busy = true;
            $scope.createBackup.percent = 0;
            $scope.createBackup.message = '';
            $scope.createBackup.errorMessage = '';

            Client.startBackup(function (error, taskId) {
                if (error) {
                    if (error.statusCode === 409 && error.message.indexOf('full_backup') !== -1) {
                        $scope.createBackup.errorMessage = 'Backup already in progress. Please retry later.';
                    } else if (error.statusCode === 409) {
                        $scope.createBackup.errorMessage = 'App task is currently in progress. Please retry later.';
                    } else {
                        console.error(error);
                        $scope.createBackup.errorMessage = error.message;
                    }

                    $scope.createBackup.busy = false;
                    $('#createBackupFailedModal').modal('show');

                    return;
                }

                getBackupTasks();

                $scope.createBackup.taskId = taskId;
                $scope.createBackup.updateStatus();
            });
        },


        stopTask: function () {
            Client.stopTask($scope.createBackup.taskId, function (error) {
                if (error) {
                    if (error.statusCode === 409) {
                        $scope.createBackup.errorMessage = 'No backup is currently in progress';
                    } else {
                        console.error(error);
                        $scope.createBackup.errorMessage = error.message;
                    }

                    $scope.createBackup.busy = false;
                    getBackupTasks();

                    return;
                }
            });
        }
    };

    $scope.cleanupBackups = {
        busy: false,
        taskId: 0,

        init: function () {
            Client.getLatestTaskByType(TASK_TYPES.TASK_CLEAN_BACKUPS, function (error, task) {
                if (error) return console.error(error);

                if (!task) return;

                $scope.cleanupBackups.taskId = task.id;
                $scope.cleanupBackups.updateStatus();

                getCleanupTasks();
            });
        },

        updateStatus: function () {
            Client.getTask($scope.cleanupBackups.taskId, function (error, data) {
                if (error) return window.setTimeout($scope.cleanupBackups.updateStatus, 5000);

                if (!data.active) {
                    $scope.cleanupBackups.busy = false;

                    getCleanupTasks();
                    fetchBackups();

                    return;
                }

                $scope.cleanupBackups.busy = true;
                $scope.cleanupBackups.message = data.message;
                window.setTimeout($scope.cleanupBackups.updateStatus, 3000);
            });
        },

        ask: function () {
            $('#cleanupBackupsModal').modal('show');
        },

        start: function () {
            $scope.cleanupBackups.busy = true;

            $('#cleanupBackupsModal').modal('hide');

            Client.cleanupBackups(function (error, taskId) {
                if (error) console.error(error);

                $scope.cleanupBackups.taskId = taskId;
                $scope.cleanupBackups.updateStatus();

                getCleanupTasks();
            });
        }
    };

    $scope.archiveList = {
        ready: false,
        archives: [],

        fetch: function () {
            Client.listArchives(function (error, archives) {
                if (error) Client.error(error);
                $scope.archiveList.archives = archives;
                $scope.archiveList.ready = true;

                // ensure we use the full api oprigin
                $scope.archiveList.archives.forEach(a => {
                    a.iconUrl = window.cloudronApiOrigin + a.iconUrl;
                });
            });
        },
    };

    $scope.archiveDelete = {
        busy: false,
        error: {},
        archive: null,
        title: '',
        fqdn: '',

        ask: function (archive) {
            $scope.archiveDelete.busy = false;
            $scope.archiveDelete.error = {};
            $scope.archiveDelete.archive = archive;
            $scope.archiveDelete.title = archive.manifest.title;
            $scope.archiveDelete.fqdn = archive.appConfig?.fqdn || '-';
            $('#archiveDeleteModal').modal('show');
        },

        submit: function () {
            $scope.archiveDelete.busy = true;
            $scope.archiveDelete.error = {};

            Client.deleteArchive($scope.archiveDelete.archive.id, function (error) {
                $scope.archiveDelete.busy = false;
                if (error) return console.error('Unable to delete archive.', error.statusCode, error.message);
                $scope.archiveList.fetch();
                $('#archiveDeleteModal').modal('hide');
            });
        }
    };

    // keep in sync with app.js
    $scope.archiveRestore = {
        busy: false,
        error: {},

        archive: null,
        manifest: null,
        appStoreId: '',
        fqdn: '',

        subdomain: '',
        domain: null,
        secondaryDomains: {},
        needsOverwrite: false,
        overwriteDns: false,
        ports: {},
        portsEnabled: {},
        portInfo: {},
        accessRestriction: { users: [], groups: [] },

        init: function () {
            Client.getDomains(function (error, domains) {
                if (error) return console.error('Unable to get domain listing.', error);
                $scope.domains = domains;
            });
        },

        show: function (archive) {
            $scope.archiveRestore.error = {};
            $scope.archiveRestore.archive = archive;
            $scope.archiveRestore.manifest = archive.manifest;

            const app = archive.appConfig || {
                subdomain: '',
                domain: $scope.domains[0].domain,
                secondaryDomains: [],
                portBindings: {}
            }; // pre-8.2 backups do not have appConfig

            $scope.archiveRestore.fqdn = archive.appConfig?.fqdn || '-';

            $scope.archiveRestore.subdomain = app.subdomain;
            $scope.archiveRestore.domain = $scope.domains.find(function (d) { return app.domain === d.domain; }); // try to pre-select the app's domain

            $scope.archiveRestore.needsOverwrite = false;
            $scope.archiveRestore.overwriteDns = false;

            $scope.archiveRestore.secondaryDomains = {};

            var httpPorts = archive.manifest.httpPorts || {};
            for (var env2 in httpPorts) {
                $scope.archiveRestore.secondaryDomains[env2] = {
                    subdomain: httpPorts[env2].defaultValue || '',
                    domain: $scope.archiveRestore.domain
                };
            }
            // now fill secondaryDomains with real values, if it exists
            app.secondaryDomains.forEach(function (sd) {
                $scope.archiveRestore.secondaryDomains[sd.environmentVariable] = {
                    subdomain: sd.subdomain,
                    domain: $scope.domains.find(function (d) { return sd.domain === d.domain; })
                };
            });

            $scope.archiveRestore.portInfo = angular.extend({}, archive.manifest.tcpPorts, archive.manifest.udpPorts);   // Portbinding map only for information
            // set default ports
            for (var env in $scope.archiveRestore.portInfo) {
                if (app.portBindings[env]) { // was enabled in the app
                    $scope.archiveRestore.ports[env] = app.portBindings[env].hostPort;
                    $scope.archiveRestore.portsEnabled[env] = true;
                } else {
                    $scope.archiveRestore.ports[env] = $scope.archiveRestore.portInfo[env].defaultValue || 0;
                    $scope.archiveRestore.portsEnabled[env] = false;
                }
            }

            $('#restoreArchiveModal').modal('show');
        },

        submit: function () {
            $scope.archiveRestore.busy = true;

            var secondaryDomains = {};
            for (var env2 in $scope.archiveRestore.secondaryDomains) {
                secondaryDomains[env2] = {
                    subdomain: $scope.archiveRestore.secondaryDomains[env2].subdomain,
                    domain: $scope.archiveRestore.secondaryDomains[env2].domain.domain
                };
            }

            // only use enabled ports
            var finalPorts = {};
            for (var env in $scope.archiveRestore.ports) {
                if ($scope.archiveRestore.portsEnabled[env]) {
                    finalPorts[env] = $scope.archiveRestore.ports[env];
                }
            }

            var data = {
                subdomain: $scope.archiveRestore.subdomain,
                domain: $scope.archiveRestore.domain.domain,
                secondaryDomains: secondaryDomains,
                ports: finalPorts,
                overwriteDns: $scope.archiveRestore.overwriteDns,
            };

            var allDomains = [{ domain: data.domain, subdomain: data.subdomain }].concat(Object.keys(secondaryDomains).map(function (k) {
                return {
                    domain: secondaryDomains[k].domain,
                    subdomain: secondaryDomains[k].subdomain
                };
            }));
            async.eachSeries(allDomains, function (domain, callback) {
                if ($scope.archiveRestore.overwriteDns) return callback();

                Client.checkDNSRecords(domain.domain, domain.subdomain, function (error, result) {
                    if (error) return callback(error);

                    var fqdn = domain.subdomain + '.' + domain.domain;

                    if (result.error) {
                        if (result.error.reason === ERROR.ACCESS_DENIED) return callback({ type: 'provider', fqdn: fqdn, message: 'DNS credentials for ' + domain.domain + ' are invalid. Update it in Domains & Certs view' });
                        return callback({ type: 'provider', fqdn: fqdn, message: result.error.message });
                    }
                    if (result.needsOverwrite) {
                        $scope.archiveRestore.needsOverwrite = true;
                        $scope.archiveRestore.overwriteDns = true;
                        return callback({ type: 'externally_exists', fqdn: fqdn, message: 'DNS Record already exists. Confirm that the domain is not in use for services external to Cloudron' });
                    }

                    callback();
                });
            }, function (error) {
                if (error) {
                    if (error.type) {
                        $scope.archiveRestore.error.location = error;
                        $scope.archiveRestore.busy = false;
                    } else {
                        Client.error(error);
                    }

                    $scope.archiveRestore.error.location = error;
                    $scope.archiveRestore.busy = false;
                    return;
                }

                Client.unarchiveApp($scope.archiveRestore.archive.id, data, function (error/*, newApp */) {
                    $scope.archiveRestore.busy = false;

                    if (error) {
                        var errorMessage = error.message.toLowerCase();
                        if (errorMessage.indexOf('port') !== -1) {
                            $scope.archiveRestore.error.port = error.message;
                        } else if (error.message.indexOf('location') !== -1 || error.message.indexOf('subdomain') !== -1) {
                            // TODO extract fqdn from error message, currently we just set it always to the main location
                            $scope.archiveRestore.error.location = { type: 'internally_exists', fqdn: data.subdomain + '.' + data.domain, message: error.message };
                            $('#cloneLocationInput').focus();
                        } else {
                            Client.error(error);
                        }
                        return;
                    }

                    $('#restoreArchiveModal').modal('hide');

                    $location.path('/apps');
                });
            });
        }
    };

    $scope.s3like = function (provider) {
        return provider === 's3' || provider === 'minio' || provider === 's3-v4-compat'
            || provider === 'exoscale-sos' || provider === 'digitalocean-spaces' || provider === 'hetzner-objectstorage'
            || provider === 'scaleway-objectstorage' || provider === 'wasabi' || provider === 'backblaze-b2' || provider === 'cloudflare-r2'
            || provider === 'linode-objectstorage' || provider === 'ovh-objectstorage' || provider === 'ionos-objectstorage'
            || provider === 'vultr-objectstorage' || provider === 'upcloud-objectstorage' || provider === 'idrive-e2'
            || provider === 'contabo-objectstorage';
    };

    $scope.mountlike = function (provider) {
        return provider === 'sshfs' || provider === 'cifs' || provider === 'nfs' || provider === 'mountpoint' || provider === 'ext4' || provider === 'xfs' || provider === 'disk';
    };

    // https://stackoverflow.com/questions/3665115/how-to-create-a-file-in-memory-for-user-to-download-but-not-through-server#18197341
    function download(filename, text) {
        var element = document.createElement('a');
        element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
        element.setAttribute('download', filename);

        element.style.display = 'none';
        document.body.appendChild(element);

        element.click();

        document.body.removeChild(element);
    }

    $scope.downloadConfig = function (backup, isArchive) { // can also be a archive object
        // secrets and tokens already come with placeholder characters we remove them
        var tmp = {
            remotePath: backup.remotePath,
            encrypted: !!$scope.backupConfig.password  // we add this just to help the import UI
        };

        Object.keys($scope.backupConfig).forEach(function (k) {
            if ($scope.backupConfig[k] !== SECRET_PLACEHOLDER) tmp[k] = $scope.backupConfig[k];
        });

        let filename;
        if (isArchive) {
            filename = `${backup.appConfig.fqdn}-archive-config-${(new Date(backup.creationTime)).toISOString().split('T')[0]}.json`;
        } else {
            filename = `${$scope.config.adminFqdn}-backup-config-${(new Date(backup.creationTime)).toISOString().split('T')[0]}.json`;
        }

        download(filename, JSON.stringify(tmp, null, 4));
    };

    $scope.editBackup = {
        busy: false,
        error: null,
        backup: null,

        label: '',
        persist: false,

        show: function (backup) {
            $scope.editBackup.backup = backup;
            $scope.editBackup.label = backup.label;
            $scope.editBackup.persist = backup.preserveSecs === -1;
            $scope.editBackup.error = null;
            $scope.editBackup.busy = false;

            $('#editBackupModal').modal('show');
        },

        submit: function () {
            $scope.editBackup.error = null;
            $scope.editBackup.busy = true;

            Client.editBackup($scope.editBackup.backup.id, $scope.editBackup.label, $scope.editBackup.persist ? -1 : 0, function (error) {
                $scope.editBackup.busy = false;
                if (error) return $scope.editBackup.error = error.message;

                fetchBackups();

                $('#editBackupModal').modal('hide');
            });
        }
    };

    $scope.backupDetails = {
        backup: null,

        show: function (backup) {
            $scope.backupDetails.backup = backup;
            $('#backupDetailsModal').modal('show');
        }
    };

    $scope.backupPolicy = {
        busy: false,
        error: {},

        currentPolicy: null,

        retention:  null,
        days: [],
        hours: [],

        init: function () {
            Client.getBackupPolicy(function (error, policy) {
                if (error) Client.error(error);
                $scope.backupPolicy.currentPolicy = policy;
            });
        },

        show: function () {
            $scope.backupPolicy.error = {};
            $scope.backupPolicy.busy = false;

            var selectedRetention = $scope.backupRetentions.find(function (x) { return angular.equals(x.value, $scope.backupPolicy.currentPolicy.retention); });
            if (!selectedRetention) selectedRetention = $scope.backupRetentions[0];

            $scope.backupPolicy.retention = selectedRetention.value;

            var tmp = $scope.backupPolicy.currentPolicy.schedule.split(' ');
            var hours = tmp[2].split(','), days = tmp[5].split(',');
            if (days[0] === '*') {
                $scope.backupPolicy.days = angular.copy($scope.cronDays, []);
            } else {
                $scope.backupPolicy.days = days.map(function (day) { return $scope.cronDays[parseInt(day, 10)]; });
            }
            $scope.backupPolicy.hours = hours.map(function (hour) { return $scope.cronHours[parseInt(hour, 10)]; });

            $('#backupPolicyModal').modal('show');
        },

        valid: function () {
            return $scope.backupPolicy.days.length && $scope.backupPolicy.hours.length;
        },

        submit: function () {
            if (!$scope.backupPolicy.days.length) return;
            if (!$scope.backupPolicy.hours.length) return;

            $scope.backupPolicy.error = {};
            $scope.backupPolicy.busy = true;

            var daysPattern;
            if ($scope.backupPolicy.days.length === 7) daysPattern = '*';
            else daysPattern = $scope.backupPolicy.days.map(function (d) { return d.value; });

            var hoursPattern;
            if ($scope.backupPolicy.hours.length === 24) hoursPattern = '*';
            else hoursPattern = $scope.backupPolicy.hours.map(function (d) { return d.value; });

            var policy = {
                retention: $scope.backupPolicy.retention,
                schedule: '00 00 ' + hoursPattern + ' * * ' + daysPattern
            };

            Client.setBackupPolicy(policy, function (error) {
                $scope.backupPolicy.busy = false;

                if (error) {
                    if (error.statusCode === 424) {
                        $scope.backupPolicy.error.generic = error.message;
                    } else if (error.statusCode === 400) {
                        $scope.backupPolicy.error.generic = error.message;
                    } else {
                        console.error('Unable to change schedule or retention.', error);
                    }

                    return;
                }

                $('#backupPolicyModal').modal('hide');

                $scope.backupPolicy.init();
            });
        }
    };

    $scope.$watch('configureBackup.disk', function (newValue) {
        if (!newValue) return;
        $scope.configureBackup.mountOptions.diskPath = '/dev/disk/by-uuid/' + newValue.uuid;
    });

    $scope.configureBackup = {
        busy: false,
        error: {},

        provider: '',
        bucket: '',
        prefix: '',
        accessKeyId: '',
        secretAccessKey: '',
        gcsKey: { keyFileName: '', content: '' },
        region: '',
        endpoint: '',
        backupFolder: '',
        mountPoint: '',
        acceptSelfSignedCerts: false,
        useHardlinks: true,
        chown: true,
        format: 'tgz',
        password: '',
        passwordRepeat: '',
        encryptedFilenames: true,
        advancedVisible: false,

        memoryTicks: [],
        memoryLimit: $scope.MIN_MEMORY_LIMIT,
        uploadPartSize: 50 * 1024 * 1024,
        copyConcurrency: '',
        downloadConcurrency: '',
        syncConcurrency: '', // sort of similar to upload

        blockDevices: [],
        disk: null,
        mountOptions: {
            host: '',
            remoteDir: '',
            username: '',
            password: '',
            diskPath: '',
            seal: true,
            user: '',
            port: 22,
            privateKey: ''
        },

        clearProviderFields: function () {
            $scope.configureBackup.bucket = '';
            $scope.configureBackup.prefix = '';
            $scope.configureBackup.accessKeyId = '';
            $scope.configureBackup.secretAccessKey = '';
            $scope.configureBackup.gcsKey.keyFileName = '';
            $scope.configureBackup.gcsKey.content = '';
            $scope.configureBackup.endpoint = '';
            $scope.configureBackup.region = '';
            $scope.configureBackup.backupFolder = '';
            $scope.configureBackup.mountPoint = '';
            $scope.configureBackup.acceptSelfSignedCerts = false;
            $scope.configureBackup.useHardlinks = true;
            $scope.configureBackup.chown = true;
            $scope.configureBackup.memoryLimit = $scope.MIN_MEMORY_LIMIT;

            // scaleway only supports 1000 parts per object (https://www.scaleway.com/en/docs/s3-multipart-upload/)
            $scope.configureBackup.uploadPartSize = $scope.configureBackup.provider === 'scaleway-objectstorage' ? 100 * 1024 * 1024 : 10 * 1024 * 1024;
            $scope.configureBackup.downloadConcurrency = $scope.configureBackup.provider === 's3' ? 30 : 10;
            $scope.configureBackup.syncConcurrency = $scope.configureBackup.provider === 's3' ? 20 : 10;
            $scope.configureBackup.copyConcurrency = $scope.configureBackup.provider === 's3' ? 500 : 10;

            $scope.configureBackup.disk = null;
            $scope.configureBackup.mountOptions = { host: '', remoteDir: '', username: '', password: '', diskPath: '', seal: true, user: '', port: 22, privateKey: '' };
        },

        show: function () {
            $scope.configureBackup.error = {};
            $scope.configureBackup.busy = false;

            $scope.configureBackup.advancedVisible = false;

            $scope.configureBackup.provider = $scope.backupConfig.provider;
            $scope.configureBackup.bucket = $scope.backupConfig.bucket;
            $scope.configureBackup.prefix = $scope.backupConfig.prefix;
            $scope.configureBackup.region = $scope.backupConfig.region;
            $scope.configureBackup.accessKeyId = $scope.backupConfig.accessKeyId;
            $scope.configureBackup.secretAccessKey = $scope.backupConfig.secretAccessKey;
            if ($scope.backupConfig.provider === 'gcs') {
                $scope.configureBackup.gcsKey.keyFileName = $scope.backupConfig.credentials.client_email;
                $scope.configureBackup.gcsKey.content = JSON.stringify({
                    project_id: $scope.backupConfig.projectId,
                    client_email: $scope.backupConfig.credentials.client_email,
                    private_key: $scope.backupConfig.credentials.private_key,
                });
            }
            $scope.configureBackup.endpoint = $scope.backupConfig.endpoint;
            $scope.configureBackup.password = $scope.backupConfig.password || '';
            $scope.configureBackup.passwordRepeat = '';
            $scope.configureBackup.encryptedFilenames = 'encryptedFilenames' in $scope.backupConfig ? $scope.backupConfig.encryptedFilenames : true;
            $scope.configureBackup.backupFolder = $scope.backupConfig.backupFolder;
            $scope.configureBackup.mountPoint = $scope.backupConfig.mountPoint;
            $scope.configureBackup.format = $scope.backupConfig.format;
            $scope.configureBackup.acceptSelfSignedCerts = !!$scope.backupConfig.acceptSelfSignedCerts;
            $scope.configureBackup.useHardlinks = !$scope.backupConfig.noHardlinks;
            $scope.configureBackup.chown = $scope.backupConfig.chown;

            const limits = $scope.backupConfig.limits || {};

            $scope.configureBackup.memoryLimit = limits.memoryLimit ? Math.max(limits.memoryLimit, $scope.MIN_MEMORY_LIMIT) : $scope.MIN_MEMORY_LIMIT;
            $scope.configureBackup.uploadPartSize = limits.uploadPartSize || ($scope.configureBackup.provider === 'scaleway-objectstorage' ? 100 * 1024 * 1024 : 10 * 1024 * 1024);
            $scope.configureBackup.downloadConcurrency = limits.downloadConcurrency || ($scope.backupConfig.provider === 's3' ? 30 : 10);
            $scope.configureBackup.syncConcurrency = limits.syncConcurrency || ($scope.backupConfig.provider === 's3' ? 20 : 10);
            $scope.configureBackup.copyConcurrency = limits.copyConcurrency || ($scope.backupConfig.provider === 's3' ? 500 : 10);

            var mountOptions = $scope.backupConfig.mountOptions || {};
            $scope.configureBackup.mountOptions = {
                host: mountOptions.host || '',
                remoteDir: mountOptions.remoteDir || '',
                username: mountOptions.username || '',
                password: mountOptions.password || '',
                diskPath: mountOptions.diskPath || '',
                seal: mountOptions.seal,
                user: mountOptions.user || '',
                port: mountOptions.port || 22,
                privateKey: mountOptions.privateKey || ''
            };

            Client.getBlockDevices(function (error, result) {
                if (error) return console.error('Failed to list blockdevices:', error);

                // only offer non /, /boot or /home disks
                result = result.filter(function (d) { return d.mountpoint !== '/' && d.mountpoint !== '/home' && d.mountpoint !== '/boot'; });
                // only offer xfs and ext4 disks
                result = result.filter(function (d) { return d.type === 'xfs' || d.type === 'ext4'; });

                // amend label for UI
                result.forEach(function (d) {
                    d.label = d.path;

                    // pre-select current if set
                    if (d.path === $scope.configureBackup.mountOptions.diskPath || ('/dev/disk/by-uuid/' + d.uuid) === $scope.configureBackup.mountOptions.diskPath) {
                        $scope.configureBackup.disk = d;
                    }
                });

                $scope.configureBackup.blockDevices = result;

                $('#configureBackupModal').modal('show');
            });
        },

        submit: function () {
            $scope.configureBackup.error = {};
            $scope.configureBackup.busy = true;

            var backupConfig = {
                provider: $scope.configureBackup.provider,
                format: $scope.configureBackup.format,
                // required for api call to provide all fields
                schedulePattern: $scope.backupConfig.schedulePattern,
                retentionPolicy: $scope.backupConfig.retentionPolicy,
                limits: {
                    memoryLimit: parseInt($scope.configureBackup.memoryLimit),
                },
            };
            if ($scope.configureBackup.password) {
                backupConfig.password = $scope.configureBackup.password;
                backupConfig.encryptedFilenames = $scope.configureBackup.encryptedFilenames; // ignored with tgz format
            }

            // only set provider specific fields, this will clear them in the db
            if ($scope.s3like(backupConfig.provider)) {
                backupConfig.bucket = $scope.configureBackup.bucket;
                backupConfig.prefix = $scope.configureBackup.prefix;
                backupConfig.accessKeyId = $scope.configureBackup.accessKeyId;
                backupConfig.secretAccessKey = $scope.configureBackup.secretAccessKey;

                if ($scope.configureBackup.endpoint) backupConfig.endpoint = $scope.configureBackup.endpoint;

                if (backupConfig.provider === 's3') {
                    if ($scope.configureBackup.region) backupConfig.region = $scope.configureBackup.region;
                    delete backupConfig.endpoint;
                } else if (backupConfig.provider === 'minio' || backupConfig.provider === 's3-v4-compat') {
                    backupConfig.region = $scope.configureBackup.region || 'us-east-1';
                    backupConfig.acceptSelfSignedCerts = $scope.configureBackup.acceptSelfSignedCerts;
                    backupConfig.s3ForcePathStyle = true; // might want to expose this in the UI
                } else if (backupConfig.provider === 'exoscale-sos') {
                    backupConfig.region = 'us-east-1';
                    backupConfig.signatureVersion = 'v4';
                } else if (backupConfig.provider === 'wasabi') {
                    backupConfig.region = $scope.wasabiRegions.find(function (x) { return x.value === $scope.configureBackup.endpoint; }).region;
                    backupConfig.signatureVersion = 'v4';
                } else if (backupConfig.provider === 'scaleway-objectstorage') {
                    backupConfig.region = $scope.scalewayRegions.find(function (x) { return x.value === $scope.configureBackup.endpoint; }).region;
                    backupConfig.signatureVersion = 'v4';
                } else if (backupConfig.provider === 'linode-objectstorage') {
                    backupConfig.region = $scope.linodeRegions.find(function (x) { return x.value === $scope.configureBackup.endpoint; }).region;
                    backupConfig.signatureVersion = 'v4';
                } else if (backupConfig.provider === 'ovh-objectstorage') {
                    backupConfig.region = $scope.ovhRegions.find(function (x) { return x.value === $scope.configureBackup.endpoint; }).region;
                    backupConfig.signatureVersion = 'v4';
                } else if (backupConfig.provider === 'ionos-objectstorage') {
                    backupConfig.region = $scope.ionosRegions.find(function (x) { return x.value === $scope.configureBackup.endpoint; }).region;
                    backupConfig.signatureVersion = 'v4';
                } else if (backupConfig.provider === 'vultr-objectstorage') {
                    backupConfig.region = $scope.vultrRegions.find(function (x) { return x.value === $scope.configureBackup.endpoint; }).region;
                    backupConfig.signatureVersion = 'v4';
                } else if (backupConfig.provider === 'contabo-objectstorage') {
                    backupConfig.region = $scope.contaboRegions.find(function (x) { return x.value === $scope.configureBackup.endpoint; }).region;
                    backupConfig.signatureVersion = 'v4';
                    backupConfig.s3ForcePathStyle = true; // https://docs.contabo.com/docs/products/Object-Storage/technical-description (no virtual buckets)
                } else if (backupConfig.provider === 'upcloud-objectstorage') { // the UI sets region and endpoint
                    var m = /^.*\.(.*)\.upcloudobjects.com$/.exec(backupConfig.endpoint);
                    backupConfig.region = m ? m[1] : 'us-east-1'; // let it fail in validation phase if m is not valid
                    backupConfig.signatureVersion = 'v4';
                } else if (backupConfig.provider === 'digitalocean-spaces') {
                    backupConfig.region = 'us-east-1';
                } else if (backupConfig.provider === 'hetzner-objectstorage') {
                    backupConfig.region = 'us-east-1';
                    backupConfig.signatureVersion = 'v4';
                }

                backupConfig.limits.uploadPartSize = parseInt($scope.configureBackup.uploadPartSize);
            } else if (backupConfig.provider === 'gcs') {
                backupConfig.bucket = $scope.configureBackup.bucket;
                backupConfig.prefix = $scope.configureBackup.prefix;
                try {
                    var serviceAccountKey = JSON.parse($scope.configureBackup.gcsKey.content);
                    backupConfig.projectId = serviceAccountKey.project_id;
                    backupConfig.credentials = {
                        client_email: serviceAccountKey.client_email,
                        private_key: serviceAccountKey.private_key
                    };

                    if (!backupConfig.projectId || !backupConfig.credentials || !backupConfig.credentials.client_email || !backupConfig.credentials.private_key) {
                        throw 'fields_missing';
                    }
                } catch (e) {
                    $scope.configureBackup.error.generic = 'Cannot parse Google Service Account Key: ' + e.message;
                    $scope.configureBackup.error.gcsKeyInput = true;
                    $scope.configureBackup.busy = false;
                    return;
                }
            } else if ($scope.mountlike(backupConfig.provider)) {
                backupConfig.prefix = $scope.configureBackup.prefix;
                backupConfig.noHardlinks = !$scope.configureBackup.useHardlinks;
                backupConfig.mountOptions = {};

                if (backupConfig.provider === 'cifs' || backupConfig.provider === 'sshfs' || backupConfig.provider === 'nfs') {
                    backupConfig.mountOptions.host = $scope.configureBackup.mountOptions.host;
                    backupConfig.mountOptions.remoteDir = $scope.configureBackup.mountOptions.remoteDir;

                    if (backupConfig.provider === 'cifs') {
                        backupConfig.mountOptions.username = $scope.configureBackup.mountOptions.username;
                        backupConfig.mountOptions.password = $scope.configureBackup.mountOptions.password;
                        backupConfig.mountOptions.seal = $scope.configureBackup.mountOptions.seal;
                    } else if (backupConfig.provider === 'sshfs') {
                        backupConfig.mountOptions.user = $scope.configureBackup.mountOptions.user;
                        backupConfig.mountOptions.port = $scope.configureBackup.mountOptions.port;
                        backupConfig.mountOptions.privateKey = $scope.configureBackup.mountOptions.privateKey;
                    }
                } else if (backupConfig.provider === 'ext4' || backupConfig.provider === 'xfs' || backupConfig.provider === 'disk') {
                    backupConfig.mountOptions.diskPath = $scope.configureBackup.mountOptions.diskPath;
                } else if (backupConfig.provider === 'mountpoint') {
                    backupConfig.mountPoint = $scope.configureBackup.mountPoint;
                    backupConfig.chown = $scope.configureBackup.chown;
                    backupConfig.preserveAttributes = true;
                }
            } else if (backupConfig.provider === 'filesystem') {
                backupConfig.backupFolder = $scope.configureBackup.backupFolder;
                backupConfig.noHardlinks = !$scope.configureBackup.useHardlinks;
            }

            if (backupConfig.format === 'rsync') {
                backupConfig.limits.downloadConcurrency = parseInt($scope.configureBackup.downloadConcurrency);
                backupConfig.limits.syncConcurrency = parseInt($scope.configureBackup.syncConcurrency);
                backupConfig.limits.copyConcurrency = parseInt($scope.configureBackup.copyConcurrency);
            }

            Client.setBackupConfig(backupConfig, function (error) {
                $scope.configureBackup.busy = false;

                if (error) {
                    if (error.statusCode === 424) {
                        $scope.configureBackup.error.generic = error.message;

                        if (error.message.indexOf('AWS Access Key Id') !== -1) {
                            $scope.configureBackup.error.accessKeyId = true;
                            $scope.configureBackup.accessKeyId = '';
                            $scope.configureBackupForm.accessKeyId.$setPristine();
                            $('#inputConfigureBackupAccessKeyId').focus();
                        } else if (error.message.indexOf('not match the signature') !== -1 ) {
                            $scope.configureBackup.error.secretAccessKey = true;
                            $scope.configureBackup.secretAccessKey = '';
                            $scope.configureBackupForm.secretAccessKey.$setPristine();
                            $('#inputConfigureBackupSecretAccessKey').focus();
                        } else if (error.message.toLowerCase() === 'access denied') {
                            $scope.configureBackup.error.bucket = true;
                            $scope.configureBackup.bucket = '';
                            $scope.configureBackupForm.bucket.$setPristine();
                            $('#inputConfigureBackupBucket').focus();
                        } else if (error.message.indexOf('ECONNREFUSED') !== -1) {
                            $scope.configureBackup.error.generic = 'Unknown region';
                            $scope.configureBackup.error.region = true;
                            $scope.configureBackupForm.region.$setPristine();
                            $('#inputConfigureBackupDORegion').focus();
                        } else if (error.message.toLowerCase() === 'wrong region') {
                            $scope.configureBackup.error.generic = 'Wrong S3 Region';
                            $scope.configureBackup.error.region = true;
                            $scope.configureBackupForm.region.$setPristine();
                            $('#inputConfigureBackupS3Region').focus();
                        } else {
                            $('#inputConfigureBackupBucket').focus();
                        }
                    } else if (error.statusCode === 400) {
                        $scope.configureBackup.error.generic = error.message;

                        if (error.message.indexOf('password') !== -1) {
                            $scope.configureBackup.error.password = true;
                            $scope.configureBackupForm.password.$setPristine();
                        } else if ($scope.configureBackup.provider === 'filesystem') {
                            $scope.configureBackup.error.backupFolder = true;
                        }
                    } else {
                        $scope.configureBackup.error.generic = error.message;
                    }

                    return;
                }

                // $scope.configureBackup.reset();
                $('#configureBackupModal').modal('hide');

                getBackupConfig();
            });
        }
    };

    function fetchBackups() {
        Client.getBackups(function (error, backups) {
            if (error) return console.error(error);

            $scope.backups = backups;

            // add contents property
            var appsById = {}, appsByFqdn = {};
            Client.getInstalledApps().forEach(function (app) {
                appsById[app.id] = app;
                appsByFqdn[app.fqdn] = app;
            });

            $scope.backups.forEach(function (backup) {
                backup.contents = []; // { id, label, fqdn }
                backup.dependsOn.forEach(function (appBackupId) {
                    const match = appBackupId.match(/app_(.*?)_.*/); // *? means non-greedy
                    if (!match) return; // for example, 'mail'
                    const app = appsById[match[1]];
                    if (app) {
                        backup.contents.push({
                            id: app.id,
                            label: app.label,
                            fqdn: app.fqdn
                        });
                    } else {
                        backup.contents.push({
                            id: match[1],
                            label: null,
                            fqdn: null
                        });
                    }
                });
            });
        });
    }

    function getBackupConfig() {
        Client.getBackupConfig(function (error, backupConfig) {
            if (error) return console.error(error);

            $scope.backupConfig = backupConfig;
            $scope.mountStatus = null;

            if (!$scope.mountlike($scope.backupConfig.provider)) return;

            Client.getBackupMountStatus(function (error, mountStatus) {
                if (error) return console.error(error);

                $scope.mountStatus = mountStatus;
            });
        });
    }

    function getBackupTasks() {
        Client.getTasksByType(TASK_TYPES.TASK_BACKUP, function (error, tasks) {
            if (error) return console.error(error);

            if (!tasks.length) return;

            $scope.backupTasks = tasks.slice(0, 10);
        });
    }

    function getCleanupTasks() {
        Client.getTasksByType(TASK_TYPES.TASK_CLEAN_BACKUPS, function (error, tasks) {
            if (error) return console.error(error);

            if (!tasks.length) return;

            $scope.cleanupTasks = tasks.slice(0, 10);
        });
    }

    Client.onReady(function () {
        Client.memory(function (error, memory) {
            if (error) console.error(error);

            $scope.memory = memory;
            var nearestGb = Math.ceil($scope.memory.memory / (1024*1024*1024)) * 1024 * 1024 * 1024;
            $scope.MAX_MEMORY_LIMIT = nearestGb;

            fetchBackups();
            getBackupConfig();

            $scope.archiveList.fetch();

            $scope.manualBackupApps = Client.getInstalledApps().filter(function (app) { return app.type !== APP_TYPES.LINK && !app.enableBackup; });

            // show backup status
            $scope.createBackup.init();
            $scope.cleanupBackups.init();
            $scope.backupPolicy.init();
            $scope.archiveRestore.init();

            getBackupTasks();
            getCleanupTasks();
        });
    });

    function readFileLocally(obj, file, fileName) {
        return function (event) {
            $scope.$apply(function () {
                obj[file] = null;
                obj[fileName] = event.target.files[0].name;

                var reader = new FileReader();
                reader.onload = function (result) {
                    if (!result.target || !result.target.result) return console.error('Unable to read local file');
                    obj[file] = result.target.result;
                };
                reader.readAsText(event.target.files[0]);
            });
        };
    }

    document.getElementById('gcsKeyFileInput').onchange = readFileLocally($scope.configureBackup.gcsKey, 'content', 'keyFileName');

    // setup all the dialog focus handling
    ['configureBackupModal', 'editBackupModal'].forEach(function (id) {
        $('#' + id).on('shown.bs.modal', function () {
            $(this).find('[autofocus]:first').focus();
        });
    });

    $('.modal-backdrop').remove();
}]);