import {
    HttpProtocol,
    EncryptionSecret,
    Domain,
    FileRoute,
} from 'CommonServer/Config';
import Express, {
    ExpressRequest,
    ExpressResponse,
    ExpressRouter,
    NextFunction,
} from 'CommonServer/Utils/Express';
import { JSONObject } from 'Common/Types/JSON';
import StatusPagePrivateUserService from 'CommonServer/Services/StatusPagePrivateUserService';
import ObjectID from 'Common/Types/ObjectID';
import BadDataException from 'Common/Types/Exception/BadDataException';
import MailService from 'CommonServer/Services/MailService';
import EmailTemplateType from 'Common/Types/Email/EmailTemplateType';
import URL from 'Common/Types/API/URL';
import Response from 'CommonServer/Utils/Response';
import JSONWebToken from 'CommonServer/Utils/JsonWebToken';
import OneUptimeDate from 'Common/Types/Date';
import PositiveNumber from 'Common/Types/PositiveNumber';
import logger from 'CommonServer/Utils/Logger';
import JSONFunctions from 'Common/Types/JSONFunctions';
import StatusPagePrivateUser from 'Model/Models/StatusPagePrivateUser';
import StatusPage from 'Model/Models/StatusPage';
import StatusPageService from 'CommonServer/Services/StatusPageService';

const router: ExpressRouter = Express.getRouter();

router.post(
    '/forgot-password',
    async (
        req: ExpressRequest,
        res: ExpressResponse,
        next: NextFunction
    ): Promise<void> => {
        try {
            const data: JSONObject = req.body['data'];

            const user: StatusPagePrivateUser = JSONFunctions.fromJSON(
                data as JSONObject,
                StatusPagePrivateUser
            ) as StatusPagePrivateUser;

            if (!user.statusPageId) {
                throw new BadDataException('Status Page ID is required.');
            }

            const statusPage: StatusPage | null =
                await StatusPageService.findOneById({
                    id: user.statusPageId!,
                    props: {
                        isRoot: true,
                        ignoreHooks: true,
                    },
                    select: {
                        _id: true,
                        name: true,
                        pageTitle: true,
                        logoFileId: true,
                        requireSsoForLogin: true,
                    },
                });

            if (!statusPage) {
                throw new BadDataException('Status Page not found');
            }

            if (statusPage.requireSsoForLogin) {
                throw new BadDataException(
                    'Status Page supports authentication by SSO. You cannot use email and password for authentication.'
                );
            }

            const statusPageName: string | undefined =
                statusPage.pageTitle || statusPage.name;

            const statusPageURL: string =
                await StatusPageService.getStatusPageURL(statusPage.id!);

            const alreadySavedUser: StatusPagePrivateUser | null =
                await StatusPagePrivateUserService.findOneBy({
                    query: {
                        email: user.email!,
                        statusPageId: user.statusPageId!,
                    },
                    select: {
                        _id: true,
                        password: true,
                        email: true,
                    },
                    props: {
                        isRoot: true,
                    },
                });

            if (alreadySavedUser) {
                const token: string = ObjectID.generate().toString();
                await StatusPagePrivateUserService.updateOneBy({
                    query: {
                        _id: alreadySavedUser._id!,
                    },
                    data: {
                        resetPasswordToken: token,
                        resetPasswordExpires: OneUptimeDate.getOneDayAfter(),
                    },
                    props: {
                        isRoot: true,
                    },
                });

                MailService.sendMail({
                    toEmail: user.email!,
                    subject: 'Password Reset Request for ' + statusPageName,
                    templateType: EmailTemplateType.StatusPageForgotPassword,
                    vars: {
                        statusPageName: statusPageName!,
                        logoUrl: statusPage.logoFileId
                            ? new URL(HttpProtocol, Domain)
                                  .addRoute(FileRoute)
                                  .addRoute('/image/' + statusPage.logoFileId)
                                  .toString()
                            : '',
                        homeURL: statusPageURL,
                        tokenVerifyUrl: URL.fromString(statusPageURL)
                            .addRoute('/reset-password/' + token)
                            .toString(),
                    },
                }).catch((err: Error) => {
                    logger.error(err);
                });

                return Response.sendEmptyResponse(req, res);
            }

            throw new BadDataException(
                `No user is registered with ${user.email?.toString()}`
            );
        } catch (err) {
            return next(err);
        }
    }
);

router.post(
    '/reset-password',
    async (
        req: ExpressRequest,
        res: ExpressResponse,
        next: NextFunction
    ): Promise<void> => {
        try {
            const data: JSONObject = req.body['data'];

            const user: StatusPagePrivateUser = JSONFunctions.fromJSON(
                data as JSONObject,
                StatusPagePrivateUser
            ) as StatusPagePrivateUser;

            await user.password?.hashValue(EncryptionSecret);

            const alreadySavedUser: StatusPagePrivateUser | null =
                await StatusPagePrivateUserService.findOneBy({
                    query: {
                        resetPasswordToken:
                            (user.resetPasswordToken as string) || '',
                    },
                    select: {
                        _id: true,
                        password: true,
                        email: true,
                        resetPasswordExpires: true,
                    },
                    props: {
                        isRoot: true,
                    },
                });

            if (!alreadySavedUser) {
                throw new BadDataException(
                    'Invalid link. Please go to forgot password page again and request a new link.'
                );
            }

            if (
                alreadySavedUser &&
                OneUptimeDate.hasExpired(alreadySavedUser.resetPasswordExpires!)
            ) {
                throw new BadDataException(
                    'Expired link. Please go to forgot password page again and request a new link.'
                );
            }

            const statusPage: StatusPage | null =
                await StatusPageService.findOneById({
                    id: new ObjectID(data['statusPageId'] as string),
                    props: {
                        isRoot: true,
                        ignoreHooks: true,
                    },
                    select: {
                        _id: true,
                        name: true,
                        pageTitle: true,
                        logoFileId: true,
                        requireSsoForLogin: true,
                    },
                });

            if (!statusPage) {
                throw new BadDataException('Status Page not found');
            }

            if (statusPage.requireSsoForLogin) {
                throw new BadDataException(
                    'Status Page supports authentication by SSO. You cannot use email and password for authentication.'
                );
            }

            const statusPageName: string | undefined =
                statusPage.pageTitle || statusPage.name;

            const statusPageURL: string =
                await StatusPageService.getStatusPageURL(statusPage.id!);

            await StatusPagePrivateUserService.updateOneById({
                id: alreadySavedUser.id!,
                data: {
                    password: user.password!,
                    resetPasswordToken: null!,
                    resetPasswordExpires: null!,
                },
                props: {
                    isRoot: true,
                },
            });

            MailService.sendMail({
                toEmail: alreadySavedUser.email!,
                subject: 'Password Changed.',
                templateType: EmailTemplateType.StatusPagePasswordChanged,
                vars: {
                    homeURL: statusPageURL,
                    statusPageName: statusPageName || '',
                    logoUrl: statusPage.logoFileId
                        ? new URL(HttpProtocol, Domain)
                              .addRoute(FileRoute)
                              .addRoute('/image/' + statusPage.logoFileId)
                              .toString()
                        : '',
                },
            }).catch((err: Error) => {
                logger.error(err);
            });

            return Response.sendEmptyResponse(req, res);
        } catch (err) {
            return next(err);
        }
    }
);

router.post(
    '/login',
    async (
        req: ExpressRequest,
        res: ExpressResponse,
        next: NextFunction
    ): Promise<void> => {
        try {
            const data: JSONObject = req.body['data'];

            const user: StatusPagePrivateUser = JSONFunctions.fromJSON(
                data as JSONObject,
                StatusPagePrivateUser
            ) as StatusPagePrivateUser;

            if (!user.statusPageId) {
                throw new BadDataException('Status Page ID not found');
            }

            const statusPage: StatusPage | null =
                await StatusPageService.findOneById({
                    id: user.statusPageId,
                    props: {
                        isRoot: true,
                        ignoreHooks: true,
                    },
                    select: {
                        requireSsoForLogin: true,
                    },
                });

            if (!statusPage) {
                throw new BadDataException('Status Page not found');
            }

            if (statusPage.requireSsoForLogin) {
                throw new BadDataException(
                    'Status Page supports authentication by SSO. You cannot use email and password for authentication.'
                );
            }

            await user.password?.hashValue(EncryptionSecret);

            const alreadySavedUser: StatusPagePrivateUser | null =
                await StatusPagePrivateUserService.findOneBy({
                    query: { email: user.email!, password: user.password! },
                    select: {
                        _id: true,
                        password: true,
                        email: true,
                        statusPageId: true,
                    },
                    props: {
                        isRoot: true,
                    },
                });

            if (alreadySavedUser) {
                const token: string = JSONWebToken.sign(
                    alreadySavedUser,
                    OneUptimeDate.getSecondsInDays(new PositiveNumber(30))
                );

                return Response.sendJsonObjectResponse(req, res, {
                    token: token,
                    user: JSONFunctions.toJSON(
                        alreadySavedUser,
                        StatusPagePrivateUser
                    ),
                });
            }
            throw new BadDataException(
                'Invalid login: Email or password does not match.'
            );
        } catch (err) {
            return next(err);
        }
    }
);

export default router;