import Controller from "swaf/Controller";
import {Request, Response} from "express";
import User from "swaf/auth/models/User";
import {WhereTest} from "swaf/db/ModelQuery";
import UserMailIdentityComponent from "../../models/UserMailIdentityComponent";
import {NotFoundHttpError, ServerError} from "swaf/HttpError";
import MailDomain from "../../models/MailDomain";
import BackendController from "swaf/helpers/BackendController";
import MailIdentity from "../../models/MailIdentity";
import {RequireAdminMiddleware, RequireAuthMiddleware} from "swaf/auth/AuthComponent";
import UserNameComponent from "swaf/auth/models/UserNameComponent";

export default class MailboxBackendController extends Controller {
    public constructor() {
        super();
        BackendController.registerMenuElement({
            getLink: async () => Controller.route('backend-mail-domains'),
            getDisplayString: async () => 'Mail domains',
            getDisplayIcon: async () => 'globe',
        });
        BackendController.registerMenuElement({
            getLink: async () => Controller.route('backend-mailboxes'),
            getDisplayString: async () => 'Mailboxes',
            getDisplayIcon: async () => 'mail',
        });
    }

    public getRoutesPrefix(): string {
        return '/backend/mailboxes';
    }

    public routes(): void {
        this.get('/', this.getMailboxesBackend, 'backend-mailboxes', RequireAuthMiddleware, RequireAdminMiddleware);
        this.get('/mailbox/:id', this.getMailboxBackend, 'backend-mailbox', RequireAuthMiddleware, RequireAdminMiddleware);

        this.get('/domains', this.getDomainsBackend, 'backend-mail-domains', RequireAuthMiddleware, RequireAdminMiddleware);
        this.post('/add-domain', this.postAddDomain, 'backend-add-domain', RequireAuthMiddleware, RequireAdminMiddleware);
        this.get('/edit-domain/:id', this.getEditDomain, 'backend-edit-domain', RequireAuthMiddleware, RequireAdminMiddleware);
        this.post('/edit-domain/:id', this.postEditDomain, 'backend-edit-domain', RequireAuthMiddleware, RequireAdminMiddleware);
        this.post('/remove-domain', this.postRemoveDomain, 'backend-remove-domain', RequireAuthMiddleware, RequireAdminMiddleware);

        this.post('/:id/create-mail-identity', this.postCreateMailIdentity, 'backend-create-mail-identity', RequireAuthMiddleware, RequireAdminMiddleware);
        this.post('/set-main-mail-identity', this.postSetMainMailIdentity, 'backend-set-main-mail-identity', RequireAuthMiddleware, RequireAdminMiddleware);
        this.post('/delete-mail-identity', this.postDeleteMailIdentity, 'backend-delete-mail-identity', RequireAuthMiddleware, RequireAdminMiddleware);
    }

    protected async getMailboxesBackend(req: Request, res: Response): Promise<void> {
        const users = await User.select()
            .where('main_mail_identity_id', null, WhereTest.NE)
            .with('mainMailIdentity')
            .with('mailIdentities')
            .get();

        res.render('backend/mailboxes', {
            users: [{
                value: 0,
                display: 'Public',
            }, ...(await User.select().get()).map(u => ({
                value: u.id,
                display: u.name,
            }))],
            mailboxes: await Promise.all(users.map(async user => ({
                id: user.id,
                username: user.as(UserNameComponent).name,
                name: await (await user.as(UserMailIdentityComponent).mainMailIdentity.get())?.toEmail(),
                identity_count: (await user.as(UserMailIdentityComponent).mailIdentities.get()).length,
                domain_count: (await user.as(UserMailIdentityComponent).mailDomains.get()).length,
            }))),
        });
    }

    protected async getMailboxBackend(req: Request, res: Response): Promise<void> {
        const user = await User.select()
            .where('id', req.params.id)
            .with('mailIdentities')
            .first();
        if (!user) throw new NotFoundHttpError('User', req.url);

        const mainMailIdentity = await user.as(UserMailIdentityComponent).mainMailIdentity.get();
        const mailDomains = await MailDomain.select().get();
        const mailIdentities = await user.as(UserMailIdentityComponent).mailIdentities.get();
        res.render('backend/mailbox', {
            mailbox: {
                id: user.id,
                userName: user.as(UserNameComponent).name,
                name: await mainMailIdentity?.toEmail() || 'Not created.',
                exists: !!mainMailIdentity,
            },
            domains: mailDomains.map(d => ({
                display: d.name,
                value: d.id,
            })),
            identities: await Promise.all(mailIdentities.map(async i => ({
                id: i.id,
                email: await i.toEmail(),
            }))),
        });
    }

    protected async getDomainsBackend(req: Request, res: Response): Promise<void> {
        const mailDomains = await MailDomain.select()
            .with('owner')
            .with('identities')
            .get();

        res.render('backend/mail_domains', {
            domains: await Promise.all(mailDomains.map(async domain => ({
                id: domain.id,
                name: domain.name,
                owner_name: (await domain.owner.get())?.as(UserNameComponent).name,
                identity_count: (await domain.identities.get()).length,
            }))),
        });
    }

    protected async postAddDomain(req: Request, res: Response): Promise<void> {
        const domain = MailDomain.create(req.body);
        await domain.save();
        req.flash('success', `Domain ${domain.name} successfully added with owner ${(await domain.owner.get())?.name}`);
        res.redirect(Controller.route('backend-edit-domain', domain.id));
    }

    protected async getEditDomain(req: Request, res: Response): Promise<void> {
        const domain = await MailDomain.getById(req.params.id);
        if (!domain) throw new NotFoundHttpError('Domain', req.url);

        res.render('backend/mail_domain', {
            domain: domain,
            users: [{
                value: 0,
                display: 'Public',
            }, ...(await User.select().get()).map(u => ({
                value: u.id,
                display: u.name,
            }))],
        });
    }

    protected async postEditDomain(req: Request, res: Response): Promise<void> {
        const domain = await MailDomain.select()
            .where('id', req.params.id)
            .first();
        if (!domain) throw new NotFoundHttpError('Domain', req.url);

        domain.updateWithData(req.body);
        await domain.save();

        req.flash('success', `Domain ${domain.name} updated successfully.`);
        res.redirect(Controller.route('backend-edit-domain', domain.id));
    }

    protected async postRemoveDomain(req: Request, res: Response): Promise<void> {
        const domain = await MailDomain.select()
            .where('id', req.body.id)
            .with('identities')
            .first();
        if (!domain) throw new NotFoundHttpError('Domain', req.url);

        // Don't delete that domain if it still has identities
        if ((await domain.identities.get()).length > 0) {
            req.flash('error', `This domain still has identities. Please remove all of these first (don't forget to rename mailboxes).`);
            res.redirect(Controller.route('backend-edit-domain', domain.id));
            return;
        }

        await domain.delete();

        req.flash('success', `Domain ${domain.name} successfully deleted.`);
        res.redirect(Controller.route('backend-mailboxes'));
    }

    protected async postCreateMailIdentity(req: Request, res: Response): Promise<void> {
        const user = await User.select()
            .where('id', req.params.id)
            .first();
        if (!user) throw new NotFoundHttpError('User', req.url);

        const domain = await MailDomain.getById(req.body.mail_domain_id);
        if (!domain) throw new NotFoundHttpError('domain', req.url);

        const mailIdentityComponent = user.as(UserMailIdentityComponent);

        const identity = MailIdentity.create({
            user_id: user.id,
            name: req.body.name,
            mail_domain_id: req.body.mail_domain_id,
        });

        // Save identity
        await identity.save();

        // Set main mail identity if not already set
        if (!mailIdentityComponent.main_mail_identity_id) {
            mailIdentityComponent.main_mail_identity_id = identity.id;
            await user.save();
            req.flash('info', 'Mailbox created.');
        }

        req.flash('success', 'Mail identity ' + await identity.toEmail() + ' successfully created.');
        res.redirect(Controller.route('backend-mailbox', user.id));
    }

    protected async postDeleteMailIdentity(req: Request, res: Response): Promise<void> {
        const identity = await MailIdentity.select()
            .where('id', req.body.id)
            .with('user')
            .first();
        if (!identity) throw new NotFoundHttpError('Mail identity', req.url);

        const user = identity.user.getOrFail();
        if (!user) throw new NotFoundHttpError('Mail identity owner', req.url);
        if (user.as(UserMailIdentityComponent).main_mail_identity_id === identity.id) {
            req.flash('error', `Cannot delete this user's mailbox identity.`);
            res.redirect(Controller.route('backend-mailbox', user.id));
            return;
        }

        await identity.delete();
        req.flash('success', 'Identity ' + await identity.toEmail() + ' successfully deleted.');
        res.redirect(Controller.route('backend-mailbox', user.id));
    }

    protected async postSetMainMailIdentity(req: Request, res: Response): Promise<void> {
        const identity = await MailIdentity.select()
            .where('id', req.body.id)
            .with('user.mainMailIdentity')
            .first();
        if (!identity) throw new NotFoundHttpError('Mail identity', req.url);

        const user = await identity.user.getOrFail();
        if (!user) throw new NotFoundHttpError('Mail identity owner', req.url);

        const mailIdentityComponent = user.as(UserMailIdentityComponent);
        const mainMailIdentity = mailIdentityComponent.mainMailIdentity.getOrFail();
        if (!mainMailIdentity) throw new ServerError('Could not find this users main mail identity.');

        mailIdentityComponent.main_mail_identity_id = identity.id;
        await user.save();

        req.flash('success', 'User ' + user.id + ' main mail identity set to ' + await identity.toEmail());
        req.flash('warning', 'Please rename user\'s mailbox folder to correspond to changing from ' + await mainMailIdentity.toEmail() + ' to ' + await identity.toEmail());
        res.redirect(Controller.route('backend-mailbox', user.id));
    }
}