const db = require('../../config/db.config.js'),
	errorMaker = require('../../helpers/error.maker');

const stripe = require('./stripe.controller');
const sendgrid = require('../sendgrid.controller');

const { Grant, Cause, Region, Organization, sequelize } = db;

// Create a grant for certain donor
exports.create = (req, res, next) => {
	const user = req.user;

	var {
		name,
		monthly,
		causes,
		regions,
		organizations,
		amount,
		stripeToken
	} = req.body;

	amount = Math.round(amount * 100) / 100;

	if (!stripeToken) {
		throw errorMaker(400, 'No stripe token given');
	}

	return sequelize
		.transaction(function(t) {
			return Grant.create(
				{
					donor_id: user.id,
					name,
					amount,
					monthly,
					num_causes: causes.length,
					num_regions: regions.length
				},
				{
					transaction: t
				}
			).then(grant => {
				return Promise.all([
					grant.addCauses(causes, { transaction: t }),
					grant.addRegions(regions, { transaction: t }),
					organizations.map(org => {
						grant.addOrganization(org.id, {
							through: { amount: org.amount },
							transaction: t
						});
					})
				]).then(result => grant);
			});
		})
		.then(function(grants) {
			// transaction committed
			stripe.grantCharge({
				grant: grants.dataValues,
				stripeToken,
				stripeToken,
				organizations,
				monthly,
				amount,
				user
			});

			sendgrid.paymentReceipt({
				organizations,
				total_amount: amount,
				receiver: user.email
			});

			return res.status(200).json({
				message: 'Successfully charged or subscribed',
				grant: grants.dataValues
			});
		})
		.catch(function(error) {
			// transaction rollback
			next(error);
		});
};

// Find grants with causes, regions, and organizations by donor_id
exports.findByDonorId = (req, res, next) => {
	const donor_id = req.user.id;

	Grant.findAll({
		where: {
			donor_id: donor_id
		},
		include: [Cause, Region, Organization]
	})
		.then(grants => {
			res.status(200).json({
				grants,
				number_items: grants.length
			});
		})
		.catch(error => next(error));
};

exports.delete = (req, res, next) => {
	const { grant_id } = req.body;
	const user = req.user;

	Grant.destroy({ where: { id: grant_id, donor_id: user.id } })
		.then(result => {
			var message = 'Already Deleted';
			if (result) {
				message = 'Grant Deleted';
			}

			res.status(201).json({
				result,
				message
			});
		})
		.catch(error => next(error));
};