const db = require('vn-print/core/database');
const Email = require('vn-print/core/email');
const Report = require('vn-print/core/report');
const storage = require('vn-print/core/storage');

module.exports = async function(request, response, next) {
    try {
        response.status(200).json({
            message: 'Success'
        });

        const invoices = await db.rawSql(`
                SELECT 
                        io.id,
                        io.clientFk,
                        io.issued,
                        io.ref,
                        c.email recipient,
                        c.salesPersonFk,
                        c.isToBeMailed,
                        c.hasToInvoice,
                        co.hasDailyInvoice,
                        eu.email salesPersonEmail
                    FROM invoiceOut_queue ioq
                        JOIN invoiceOut io ON io.id = ioq.invoiceFk
                        JOIN client c ON c.id = io.clientFk
                        JOIN province p ON p.id = c.provinceFk
                        JOIN country co ON co.id = p.countryFk
                        LEFT JOIN account.emailUser eu ON eu.userFk = c.salesPersonFk
                WHERE status = ''`);

        let connection;
        let invoiceId;
        for (const invoiceOut of invoices) {
            try {
                invoiceId = invoiceOut.id;
                connection = await db.getConnection();
                connection.query('START TRANSACTION');

                const args = Object.assign({
                    invoiceId: invoiceOut.id,
                    recipientId: invoiceOut.clientFk,
                    recipient: invoiceOut.recipient,
                    replyTo: invoiceOut.salesPersonEmail
                }, response.locals);

                const invoiceReport = new Report('invoice', args);
                const stream = await invoiceReport.toPdfStream();

                const issued = invoiceOut.issued;
                const year = issued.getFullYear().toString();
                const month = (issued.getMonth() + 1).toString();
                const day = issued.getDate().toString();

                const fileName = `${year}${invoiceOut.ref}.pdf`;

                // Store invoice
                storage.write(stream, {
                    type: 'invoice',
                    path: `${year}/${month}/${day}`,
                    fileName: fileName
                });

                connection.query('UPDATE invoiceOut SET hasPdf = true WHERE id = ?', [invoiceOut.id]);

                const isToBeMailed = invoiceOut.recipient && invoiceOut.salesPersonFk && invoiceOut.isToBeMailed;

                if (isToBeMailed) {
                    const mailOptions = {
                        overrideAttachments: true,
                        attachments: []
                    };

                    const invoiceAttachment = {
                        filename: fileName,
                        content: stream
                    };

                    if (invoiceOut.serial == 'E' && invoiceOut.companyCode == 'VNL') {
                        const exportation = new Report('exportation', args);
                        const stream = await exportation.toPdfStream();
                        const fileName = `CITES-${invoiceOut.ref}.pdf`;

                        mailOptions.attachments.push({
                            filename: fileName,
                            content: stream
                        });
                    }

                    mailOptions.attachments.push(invoiceAttachment);

                    const email = new Email('invoice', args);
                    await email.send(mailOptions);
                }
                // Update queue status
                sql = `UPDATE invoiceOut_queue 
                        SET status = "printed",
                            printed = NOW()
                    WHERE invoiceFk = ?`;
                connection.query(sql, [invoiceOut.id]);
                connection.query('COMMIT');
            } catch (error) {
                connection.query('ROLLBACK');
                connection.release();
                sql = `UPDATE invoiceOut_queue 
                        SET status = ?
                    WHERE invoiceFk = ?`;
                await db.rawSql(sql, [error.message, invoiceId]);
            }
        }
    } catch (error) {
        next(error);
    }
};