'use strict';

/* global angular:false */
/* global $:false */
/* global asyncForEach */

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

    var domainName = $routeParams.domain;
    if (!domainName) return $location.path('/email');

    $scope.ready = false;
    $scope.refreshBusy = true;
    $scope.client = Client;
    $scope.user = Client.getUserInfo();
    $scope.config = Client.getConfig();
    $scope.apps = Client.getInstalledApps();
    $scope.users = [];
    $scope.incomingDomains = [];
    $scope.domain = null;
    $scope.adminDomain = null;

    $scope.expectedDnsRecords = {
        mx: { },
        dkim: { },
        spf: { },
        dmarc: { },
        ptr: { }
    };
    $scope.expectedDnsRecordsTypes = [
        { name: 'MX', value: 'mx' },
        { name: 'DKIM', value: 'dkim' },
        { name: 'SPF', value: 'spf' },
        { name: 'DMARC', value: 'dmarc' },
        { name: 'PTR', value: 'ptr' }
    ];

    $scope.catchall = {
        mailboxes: [],
        busy: false,

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

            var addresses = $scope.catchall.mailboxes.map(function (m) { return m.name; });

            Client.setCatchallAddresses($scope.domain.domain, addresses, function (error) {
                if (error) console.error('Unable to add catchall address.', error);

                $timeout(function () { $scope.catchall.busy = false; }, 2000); // otherwise, it's too fast
            });
        },

        refresh: function () {
            $scope.catchall.mailboxes = $scope.domain.mailConfig.catchAll.map(function (name) {
                return $scope.mailboxes.mailboxes.find(function (m) { return m.name === name; });
            }).filter(function (m) { return !!m; });
        }
    };

    $scope.mailinglists = {
        busy: false,
        mailinglists: [],
        search: '',

        add: {
            busy: false,
            error: {},
            name: '',
            membersTxt: '',
            membersOnly: false,

            reset: function () {
                $scope.mailinglists.add.busy = false;
                $scope.mailinglists.add.error = {};
                $scope.mailinglists.add.name = '';
                $scope.mailinglists.add.membersTxt = '';
            },

            show: function () {
                $scope.mailinglists.add.reset();
                $('#mailinglistAddModal').modal('show');
            },

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

                var members = $scope.mailinglists.add.membersTxt
                    .split(/[\n,]/)
                    .map(function (m) { return m.trim(); })
                    .filter(function (m) { return m.length !== 0; });

                Client.addMailingList($scope.domain.domain, $scope.mailinglists.add.name, members,  $scope.mailinglists.add.membersOnly, function (error) {
                    $scope.mailinglists.add.busy = false;
                    $scope.mailinglists.add.error = {};

                    if (error) {
                        if (error.statusCode === 400 && error.message.indexOf('member') !== -1) {
                            $scope.mailinglists.add.error.members = error.message;
                        } else {
                            $scope.mailinglists.add.error.name = error.message;
                        }
                        return;
                    }

                    $scope.mailinglists.add.reset();
                    $scope.mailinglists.refresh();

                    $('#mailinglistAddModal').modal('hide');
                });
            }
        },

        edit: {
            busy: false,
            error: {},
            name: '',
            membersTxt: '',
            membersOnly: false,

            show: function (list) {
                $scope.mailinglists.edit.name = list.name;
                $scope.mailinglists.edit.membersTxt = list.members.sort().join('\n');
                $scope.mailinglists.edit.membersOnly = list.membersOnly;

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

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

                var members = $scope.mailinglists.edit.membersTxt.split(/[\n,]/)
                    .map(function (m) { return m.trim(); })
                    .filter(function (m) { return m.length !== 0; });

                Client.updateMailingList($scope.domain.domain, $scope.mailinglists.edit.name, members, $scope.mailinglists.edit.membersOnly, function (error) {
                    $scope.mailinglists.edit.busy = false;
                    $scope.mailinglists.edit.error = {};

                    if (error) {
                        $scope.mailinglists.edit.error.members = error.message;
                        return;
                    }

                    $scope.mailinglists.refresh();

                    $('#mailinglistEditModal').modal('hide');
                });
            }
        },

        remove: {
            busy: false,
            list: null,

            show: function (list) {
                $scope.mailinglists.remove.list = list;

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

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

                Client.removeMailingList($scope.domain.domain, $scope.mailinglists.remove.list.name, function (error) {
                    $scope.mailinglists.remove.busy = false;

                    if (error) return console.error(error);

                    $scope.mailinglists.remove.list = null;
                    $scope.mailinglists.refresh();

                    $('#mailinglistRemoveModal').modal('hide');
                });
            }
        },

        refresh: function (callback) {
            callback = typeof callback === 'function' ? callback : function (error) { if (error) return console.error(error); };

            Client.listMailingLists($scope.domain.domain, function (error, result) {
                if (error) return callback(error);

                $scope.mailinglists.mailinglists = result;

                callback();
            });
        }
    };

    $scope.mailFromValidation = {
        busy: false,

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

            Client.setMailFromValidation($scope.domain.domain, !$scope.domain.mailConfig.mailFromValidation, function (error) {
                if (error) {
                    $scope.mailFromValidation.busy = false;
                    return console.error(error);
                }

                // give sometime for the mail container to restart
                $timeout(function () {
                    $scope.mailFromValidation.busy = false;
                    $scope.refreshDomain();
                }, 5000);
            });
        }
    };

    $scope.incomingEmail = {
        busy: false,
        setupDns: true,
        setupDnsBusy: false,

        toggleEmailEnabled: function () {
            if ($scope.domain.mailConfig.enabled) {
                $('#disableEmailModal').modal('show');
            } else {
                $('#enableEmailModal').modal('show');
            }
        },

        setDnsRecords: function (callback) {
            $scope.incomingEmail.setupDnsBusy = true;

            Client.setDnsRecords($scope.domain.domain, function (error) {
                if (error) console.error(error);

                $timeout(function () { $scope.incomingEmail.setupDnsBusy = false; }, 2000); // otherwise, it's too fast

                if (callback) callback();
            });
        },

        enable: function () {
            $('#enableEmailModal').modal('hide');

            $scope.incomingEmail.busy = true;

            Client.enableMailForDomain($scope.domain.domain, true , function (error) {
                if (error) return console.error(error);

                $scope.reconfigureEmailApps();

                let maybeSetupDns = $scope.incomingEmail.setupDns ? $scope.incomingEmail.setDnsRecords : function (next) { next(); };

                maybeSetupDns(function (error) {
                    if (error) return console.error(error);

                    $scope.refreshDomain();

                    $scope.incomingEmail.busy = false;
                });
            });
        },

        disable: function () {
            $('#disableEmailModal').modal('hide');

            $scope.incomingEmail.busy = true;

            Client.enableMailForDomain($scope.domain.domain, false , function (error) {
                if (error) return console.error(error);

                $scope.reconfigureEmailApps();
                $scope.refreshDomain();
                $scope.incomingEmail.busy = false;
            });
        }
    };

    $scope.mailboxes = {
        mailboxes: [],
        search: '',

        add: {
            error: null,
            busy: false,
            name: '',
            owner: null,

            reset: function () {
                $scope.mailboxes.add.busy = false;
                $scope.mailboxes.add.error = null;
                $scope.mailboxes.add.name = '';
                $scope.mailboxes.add.owner = null;
            },

            show: function () {
                $scope.mailboxes.add.reset();
                $('#mailboxAddModal').modal('show');
            },

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

                Client.addMailbox($scope.domain.domain, $scope.mailboxes.add.name, $scope.mailboxes.add.owner.id, function (error) {
                    if (error) {
                        $scope.mailboxes.add.busy = false;
                        $scope.mailboxes.add.error = error;
                        return;
                    }

                    $scope.mailboxes.refresh();
                    $scope.catchall.refresh();

                    $('#mailboxAddModal').modal('hide');
                });
            }
        },

        edit: {
            busy: false,
            error: null,
            name: '',
            owner: null,
            incomingDomains: [],
            aliases: [],

            addAlias: function (event) {
                event.preventDefault();

                $scope.mailboxes.edit.aliases.push({
                    name: '',
                    domain: domainName
                });
            },

            delAlias: function (event, index) {
                event.preventDefault();
                $scope.mailboxes.edit.aliases.splice(index, 1);
            },

            show: function (mailbox) {
                $scope.mailboxes.edit.name = mailbox.name;
                $scope.mailboxes.edit.owner = mailbox.owner; // this can be null if mailbox had no owner
                $scope.mailboxes.edit.aliases = mailbox.aliases;

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

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

                // $scope.mailboxes.edit.owner is expected to be validated by the UI
                Client.updateMailbox($scope.domain.domain, $scope.mailboxes.edit.name, $scope.mailboxes.edit.owner.id, function (error) {
                    if (error) {
                        $scope.mailboxes.edit.error = error;
                        $scope.mailboxes.edit.busy = false;
                        return;
                    }

                    Client.setAliases($scope.mailboxes.edit.name, $scope.domain.domain, $scope.mailboxes.edit.aliases, function (error) {
                        if (error) {
                            $scope.mailboxes.edit.error = error;
                            $scope.mailboxes.edit.busy = false;
                            return;
                        }

                        $scope.mailboxes.edit.busy = false;
                        $scope.mailboxes.edit.error = null;
                        $scope.mailboxes.edit.name = '';
                        $scope.mailboxes.edit.owner = null;
                        $scope.mailboxes.edit.aliases = [];
                        $scope.mailboxes.refresh();

                        $('#mailboxEditModal').modal('hide');
                    });
                });
            }
        },

        remove: {
            busy: false,
            mailbox: null,

            show: function (mailbox) {
                $scope.mailboxes.remove.mailbox = mailbox;

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

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

                Client.removeMailbox($scope.domain.domain, $scope.mailboxes.remove.mailbox.name, function (error) {
                    $scope.mailboxes.remove.busy = false;
                    if (error) return console.error(error);

                    $scope.mailboxes.remove.mailbox = null;
                    $scope.mailboxes.refresh(function (error) {
                        if (error) return console.error(error);

                        $scope.catchall.refresh();

                        $('#mailboxRemoveModal').modal('hide');
                    });
                });
            }
        },

        refresh: function (callback) {
            callback = typeof callback === 'function' ? callback : function (error) { if (error) return console.error(error); };

            Client.getMailboxes($scope.domain.domain, function (error, mailboxes) {
                if (error) return callback(error);

                $scope.mailboxes.mailboxes = mailboxes;

                asyncForEach(mailboxes, function (m, iteratorCallback) {
                    Client.getAliases(m.name, m.domain, function (error, aliases) {
                        if (error) return iteratorCallback(error);

                        m.aliases = aliases;
                        m.owner = $scope.users.find(function (u) { return u.id === m.ownerId; }); // owner may not exist
                        m.ownerDisplayName = m.owner ? m.owner.display : ''; // this meta property is set when we get the user list
                        iteratorCallback();
                    });
                }, function iteratorDone(error) {
                    if (error) return callback(error);

                    Client.getMailUsage($scope.domain.domain, function (error, usage) {
                        if (error) return callback(error);

                        $scope.mailboxes.mailboxes.forEach(function (m) {
                            var u = usage[m.name + '@' + m.domain]; // this is unset when no emails have been received yet
                            m.usage = (u && u.size) || 0;
                        });

                        callback();
                    });
                });
            });
        }
    };

    $scope.mailRelayPresets = [
        { provider: 'cloudron-smtp', name: 'Built-in SMTP server' },
        { provider: 'external-smtp', name: 'External SMTP server', host: '', port: 587 },
        { provider: 'external-smtp-noauth', name: 'External SMTP server (No Authentication)', host: '', port: 587 },
        { provider: 'ses-smtp', name: 'Amazon SES', host: 'email-smtp.us-east-1.amazonaws.com', port: 587, spfDoc: 'https://docs.aws.amazon.com/ses/latest/DeveloperGuide/spf.html' },
        { provider: 'google-smtp', name: 'Google', host: 'smtp.gmail.com', port: 587, spfDoc: 'https://support.google.com/a/answer/33786?hl=en' },
        { provider: 'mailgun-smtp', name: 'Mailgun', host: 'smtp.mailgun.org', port: 587, spfDoc: 'https://www.mailgun.com/blog/white-labeling-dns-records-your-customers-tips-tricks' },
        { provider: 'mailjet-smtp', name: 'Mailjet', host: '', port: 587, spfDoc: 'https://app.mailjet.com/docs/spf-dkim-guide' },
        { provider: 'postmark-smtp', name: 'Postmark', host: 'smtp.postmarkapp.com', port: 587, spfDoc: 'https://postmarkapp.com/support/article/1092-how-do-i-set-up-spf-for-postmark' },
        { provider: 'sendgrid-smtp', name: 'SendGrid', host: 'smtp.sendgrid.net', port: 587, username: 'apikey', spfDoc: 'https://sendgrid.com/docs/ui/account-and-settings/spf-records/' },
        { provider: 'sparkpost-smtp', name: 'SparkPost', host: 'smtp.sparkpostmail.com', port: 587, username: 'SMTP_Injection', spfDoc: 'https://www.sparkpost.com/resources/email-explained/spf-sender-policy-framework/' },
        { provider: 'noop', name: 'Disable' },
    ];

    $scope.usesTokenAuth = function (provider) {
        return provider === 'postmark-smtp' || provider === 'sendgrid-smtp' || provider === 'sparkpost-smtp';
    };

    $scope.usesExternalServer = function (provider) {
        return provider !== 'cloudron-smtp' && provider !== 'noop';
    };

    $scope.usesPasswordAuth = function (provider) {
        return provider === 'external-smtp'
            || provider === 'ses-smtp'
            || provider === 'google-smtp'
            || provider === 'mailgun-smtp'
            || provider === 'mailjet-smtp';
    };

    $scope.mailRelay = {
        error: null,
        success: false,
        busy: false,
        preset: $scope.mailRelayPresets[0],

        presetChanged: function () {
            $scope.mailRelay.error = null;

            $scope.mailRelay.relay.provider = $scope.mailRelay.preset.provider;
            $scope.mailRelay.relay.host = $scope.mailRelay.preset.host;
            $scope.mailRelay.relay.port = $scope.mailRelay.preset.port;
            $scope.mailRelay.relay.username = '';
            $scope.mailRelay.relay.password = '';
            $scope.mailRelay.relay.serverApiToken = '';
            $scope.mailRelay.relay.acceptSelfSignedCerts = false;
        },

        // form data to be set on load
        relay: {
            provider: 'cloudron-smtp',
            host: '',
            port: 25,
            username: '',
            password: '',
            serverApiToken: '',
            acceptSelfSignedCerts: false
        },

        submit: function () {
            $scope.mailRelay.error = null;
            $scope.mailRelay.busy = true;
            $scope.mailRelay.success = false;

            var data = {
                provider: $scope.mailRelay.relay.provider,
                host: $scope.mailRelay.relay.host,
                port: $scope.mailRelay.relay.port,
                acceptSelfSignedCerts: $scope.mailRelay.relay.acceptSelfSignedCerts
            };

            // fill in provider specific username/password usage
            if (data.provider === 'postmark-smtp') {
                data.username = $scope.mailRelay.relay.serverApiToken;
                data.password = $scope.mailRelay.relay.serverApiToken;
            } else if (data.provider === 'sendgrid-smtp') {
                data.username = 'apikey';
                data.password = $scope.mailRelay.relay.serverApiToken;
            } else if (data.provider === 'sparkpost-smtp') {
                data.username = 'SMTP_Injection';
                data.password = $scope.mailRelay.relay.serverApiToken;
            } else {
                data.username = $scope.mailRelay.relay.username;
                data.password = $scope.mailRelay.relay.password;
            }

            Client.setMailRelay($scope.domain.domain, data, function (error) {

                if (error) {
                    $scope.mailRelay.error = error.message;
                    $scope.mailRelay.busy = false;
                    return;
                }

                $scope.domain.relay = data;

                // let the mail server restart, otherwise we get "Error getting IP" errors during refresh
                $timeout(function () {
                    $scope.mailRelay.busy = false;
                    $scope.mailRelay.success = true;
                    $scope.refreshDomain();

                    // clear success indicator after 5sec
                    $timeout(function () { $scope.mailRelay.success = false; }, 5000);
                }, 5000);

            });
        }
    };

    function resetDnsRecords() {
        $scope.expectedDnsRecordsTypes.forEach(function (record) {
            var type = record.value;
            $scope.expectedDnsRecords[type] = {};

            $('#collapse_dns_' + type).collapse('hide');
        });

        $('#collapse_outbound_smtp').collapse('hide');
        $('#collapse_rbl').collapse('hide');
    }

    function showExpectedDnsRecords() {
        // open the record details if they are not correct
        $scope.expectedDnsRecordsTypes.forEach(function (record) {
            var type = record.value;
            $scope.expectedDnsRecords[type] = $scope.domain.mailStatus.dns[type] || {};

            if (!$scope.expectedDnsRecords[type].status) {
                $('#collapse_dns_' + type).collapse('show');
            }
        });

        if (!$scope.domain.mailStatus.relay.status) {
            $('#collapse_outbound_smtp').collapse('show');
        }

        if (!$scope.domain.mailStatus.rbl.status) {
            $('#collapse_rbl').collapse('show');
        }
    }

    $scope.selectDomain = function () {
        $location.path('/email/' + $scope.domain.domain, false);
    };

    // this is required because we need to rewrite the MAIL_DOMAINS env var
    $scope.reconfigureEmailApps = function () {
        var installedApps = Client.getInstalledApps();
        for (var i = 0; i < installedApps.length; i++) {
            if (!installedApps[i].manifest.addons.email) continue;

            Client.repairApp(installedApps[i].id, { }, function (error) {
                if (error) console.error(error);
            });
        }
    };

    $scope.refreshDomain = function () {
        $scope.refreshBusy = true;

        resetDnsRecords();

        Client.getMailConfigForDomain(domainName, function (error, mailConfig) {
            if (error) {
                $scope.refreshBusy = false;
                return console.error(error);
            }

            // pre-fill the form
            $scope.mailRelay.relay.provider = mailConfig.relay.provider;
            $scope.mailRelay.relay.host = mailConfig.relay.host;
            $scope.mailRelay.relay.port = mailConfig.relay.port;
            $scope.mailRelay.relay.acceptSelfSignedCerts = !!mailConfig.relay.acceptSelfSignedCerts;
            $scope.mailRelay.relay.username = '';
            $scope.mailRelay.relay.password = '';
            $scope.mailRelay.relay.serverApiToken = '';

            if (mailConfig.relay.provider === 'postmark-smtp') {
                $scope.mailRelay.relay.serverApiToken = mailConfig.relay.username;
            } else if (mailConfig.relay.provider === 'sendgrid-smtp') {
                $scope.mailRelay.relay.serverApiToken = mailConfig.relay.password;
            } else if (mailConfig.relay.provider === 'sparkpost-smtp') {
                $scope.mailRelay.relay.serverApiToken = mailConfig.relay.password;
            } else {
                $scope.mailRelay.relay.username = mailConfig.relay.username;
                $scope.mailRelay.relay.password = mailConfig.relay.password;
            }

            for (var i = 0; i < $scope.mailRelayPresets.length; i++) {
                if ($scope.mailRelayPresets[i].provider === mailConfig.relay.provider) {
                    $scope.mailRelay.preset = $scope.mailRelayPresets[i];
                    break;
                }
            }

            // amend to selected domain to be available for the UI
            $scope.domain.mailConfig = mailConfig;
            $scope.domain.mailStatus = {};

            $scope.mailboxes.refresh(function (error) {
                if (error) console.error(error);

                $scope.mailinglists.refresh();
                $scope.catchall.refresh();
            });

            // we will fetch the status without blocking the ui
            Client.getMailStatusForDomain($scope.domain.domain, function (error, mailStatus) {
                $scope.refreshBusy = false;

                if (error) return console.error(error);

                $scope.domain.mailStatus = mailStatus;

                showExpectedDnsRecords();
            });
        });
    };

    $scope.refreshStatus = function () {
        $scope.refreshBusy = true;

        Client.getMailStatusForDomain($scope.domain.domain, function (error, mailStatus) {
            if (error) {
                $scope.refreshBusy = false;
                return console.error(error);
            }

            // overwrite the selected domain status to be available for the UI
            $scope.domain.mailStatus = mailStatus;

            showExpectedDnsRecords();

            $scope.refreshBusy = false;
        });
    };

    Client.onReady(function () {
        $scope.isAdminDomain = $scope.config.adminDomain === domainName;

        Client.getUsers(function (error, users) {
            if (error) return console.error('Unable to get user listing.', error);

            // ensure we have a display value available
            $scope.users = users.map(function (u) {
                u.display = u.username || u.email;
                return u;
            });

            $scope.users = users;

            Client.getDomains(function (error, result) {
                if (error) return console.error('Unable to get view domain.', error);

                $scope.domain = result.filter(function (d) { return d.domain === domainName; })[0];
                $scope.adminDomain = result.filter(function (d) { return d.domain === $scope.config.adminDomain; })[0];
                $scope.refreshDomain();

                asyncForEach(result, function (domain, iteratorDone) {
                    Client.getMailConfigForDomain(domain.domain, function (error, mailConfig) {
                        if (error) return console.error('Failed to fetch mail config for domain', domain.domain, error);

                        if (mailConfig.enabled) $scope.incomingDomains.push(domain);
                        iteratorDone();
                    });
                }, function iteratorDone(error) {
                    if (error) return console.error(error);

                    $scope.ready = true;
                });
            });
        });
    });

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

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