const express = require('express');
const axios = require('axios');
const stripBom = require('strip-bom');
const common = require('../../lib/common');
const router = express.Router();

// The homepage of the site
router.post('/checkout_action', (req, res, next) => {
    const db = req.app.db;
    const config = common.getConfig();
    const authorizenetConfig = common.getPaymentConfig();

    let authorizeUrl = 'https://api.authorize.net/xml/v1/request.api';
    if(authorizenetConfig.mode === 'test'){
        authorizeUrl = 'https://apitest.authorize.net/xml/v1/request.api';
    }

    const chargeJson = {
        createTransactionRequest: {
            merchantAuthentication: {
                name: authorizenetConfig.loginId,
                transactionKey: authorizenetConfig.transactionKey
            },
            transactionRequest: {
                transactionType: 'authCaptureTransaction',
                amount: req.session.totalCartAmount,
                payment: {
                    opaqueData: {
                        dataDescriptor: req.body.opaqueData.dataDescriptor,
                        dataValue: req.body.opaqueData.dataValue
                    }
                }
            }
        }
    };

    axios.post(authorizeUrl, chargeJson, {responseType: 'text'})
    .then((response) => {
        // This is crazy but the Authorize.net API returns a string with BOM and totally
        // screws the JSON response being parsed. So many hours wasted!
        const txn = JSON.parse(stripBom(response.data)).transactionResponse;

        if(!txn){
            console.log('Declined request payload', chargeJson);
            console.log('Declined response payload', response.data);
            res.status(400).json({err: 'Your payment has declined. Please try again'});
            return;
        }

        // order status if approved
        let orderStatus = 'Paid';
        if(txn && txn.responseCode !== '1'){
            console.log('Declined response payload', response.data);
            orderStatus = 'Declined';
        }

        let orderDoc = {
            orderPaymentId: txn.transHash,
            orderPaymentGateway: 'AuthorizeNet',
            orderPaymentMessage: 'Your payment was successfully completed',
            orderTotal: req.session.totalCartAmount,
            orderEmail: req.body.shipEmail,
            orderFirstname: req.body.shipFirstname,
            orderLastname: req.body.shipLastname,
            orderAddr1: req.body.shipAddr1,
            orderAddr2: req.body.shipAddr2,
            orderCountry: req.body.shipCountry,
            orderState: req.body.shipState,
            orderPostcode: req.body.shipPostcode,
            orderPhoneNumber: req.body.shipPhoneNumber,
            orderStatus: orderStatus,
            orderDate: new Date(),
            orderProducts: req.session.cart
        };

        // insert order into DB
        db.orders.insert(orderDoc, (err, newDoc) => {
            if(err){
                console.info(err.stack);
            }

            // get the new ID
            let newId = newDoc.insertedIds['0'];

            // add to lunr index
            common.indexOrders(req.app)
            .then(() => {
                // if approved, send email etc
                if(orderStatus === 'Paid'){
                    // set the results
                    req.session.messageType = 'success';
                    req.session.message = 'Your payment was successfully completed';
                    req.session.paymentEmailAddr = newDoc.ops[0].orderEmail;
                    req.session.paymentApproved = true;
                    req.session.paymentDetails = `<p><strong>Order ID: </strong>${newId}</p>
                    <p><strong>Transaction ID: </strong>${txn.transHash}</p>`;

                    // set payment results for email
                    let paymentResults = {
                        message: req.session.message,
                        messageType: req.session.messageType,
                        paymentEmailAddr: req.session.paymentEmailAddr,
                        paymentApproved: true,
                        paymentDetails: req.session.paymentDetails
                    };

                    // clear the cart
                    if(req.session.cart){
                        req.session.cart = null;
                        req.session.orderId = null;
                        req.session.totalCartAmount = 0;
                    }

                    // send the email with the response
                    // TODO: Should fix this to properly handle result
                    common.sendEmail(req.session.paymentEmailAddr, `Your payment with ${config.cartTitle}`, common.getEmailTemplate(paymentResults));

                    // redirect to outcome
                    res.status(200).json({orderId: newId});
                }else{
                    // redirect to failure
                    req.session.messageType = 'danger';
                    req.session.message = 'Your payment has declined. Please try again';
                    req.session.paymentApproved = false;
                    req.session.paymentDetails = `<p><strong>Order ID: </strong>${newId}
                    </p><p><strong>Transaction ID: </strong> ${txn.transHash}</p>`;
                    res.status(400).json({err: true, orderId: newId});
                }
            });
        });
    })
    .catch((err) => {
        console.log('Error sending payment to API', err);
        res.status(400).json({err: 'Your payment has declined. Please try again'});
    });
});

module.exports = router;