const reportEngine = require('./reportEngine.js');
const emailEngine = require('./emailEngine');
const express = require('express');
const routes = require(`../config/routes.json`);

module.exports = app => {
    this.path = `${appPath}/reports`;

    /**
     * Enables a report
     *
     * @param {String} name - Report state path
     */
    function registerReport(name) {
        if (!name) throw new Error('Report name required');

        app.get(`/report/${name}`, (request, response, next) => {
            response.setHeader('Content-Disposition', `attachment; filename="${name}.pdf"`);
            response.setHeader('Content-type', 'application/pdf');

            reportEngine.toPdf(name, request).then(stream => {
                stream.pipe(response);
            }).catch(e => {
                next(e);
            });
        });
    }

    /**
     * Enables a email
     *
     * @param {String} name - Report state path
     */
    function registerEmail(name) {
        if (!name) throw new Error('Email name required');

        app.get(`/email/${name}`, (request, response, next) => {
            emailEngine.render(name, request).then(rendered => {
                response.send(rendered.html);
            }).catch(e => {
                next(e);
            });
        });

        app.post(`/email/${name}`, (request, response, next) => {
            emailEngine.toEmail(name, request).then(() => {
                response.status(200).json({status: 200});
            }).catch(e => {
                next(e);
            });
        });
    }

    /**
     * Register routes
     */
    routes.forEach(route => {
        if (route.type === 'email')
            registerEmail(route.name);
        else if (route.type === 'report')
            registerReport(route.name);

        const staticPath = this.path + `/${route.name}/assets`;
        app.use(`/assets`, express.static(staticPath));
    });
};