import * as api from '../../client/src/api';
import { EndpointError, EndpointHandler, catchUnhandledErrors } from './types';
import Knex from 'knex';

export const DeleteIntegrationEndpointHandler: EndpointHandler = async (req: any, res: any, knex: Knex) => {
    if (!api.checkDeleteIntegrationRequest(req)) {
        const e: EndpointError = {
            internalMessage: 'Invalid DeleteIntegration request: ' + JSON.stringify(req.body),
            httpStatus: 400
        };
        throw e;
    }
    const reqObject: api.DeleteIntegrationRequest = req.body;
    const { id: userId } = req.user;

    console.log("User ", userId, ": Delete Integration ", reqObject);

    await knex.transaction(async (trx) => {
        try {
            // Start retrieving the integration itself.
            const integrationId = await trx.select('id')
                .from('integrations')
                .where({ 'user': userId })
                .where({ id: req.params.id })
                .then((r: any) => (r && r[0]) ? r[0]['id'] : undefined)

            // Check that we found all objects we need.
            if (!integrationId) {
                const e: EndpointError = {
                    internalMessage: 'Integration does not exist for DeleteIntegration request: ' + JSON.stringify(req.body),
                    httpStatus: 404
                };
                throw e;
            }

            // Delete the integration.
            await trx('integrations')
                .where({ 'user': userId, 'id': integrationId })
                .del();

            // Respond to the request.
            res.status(200).send();

        } catch (e) {
            catchUnhandledErrors(e);
            trx.rollback();
        }
    })
}