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

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

const {
	Grant,
	Cause,
	Region,
	Organization,
	GrantOrganization,
	Project,
	sequelize
} = db;
// Create a grant for certain donor
exports.createGrant = async (req, res, next) => {
	const user = req.user;

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

	const causes = organizations.map(org => org.primary_cause);
	const regions = organizations.map(org => org.primary_region);

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

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

	let transaction;

	try {
		// get transaction
		transaction = await sequelize.transaction();

		const grant = await Grant.create(
			{
				donor_id: user.id,
				name,
				amount: actual_total,
				monthly,
				num_causes: causes.length,
				num_regions: regions.length
			},
			{
				transaction
			}
		);

		const grantsOrgs = organizations.map(org => {
			return {
				grant_id: grant.id,
				organization_id: org.id,
				amount: org.amount
			};
		});

		// mapping between bundle and orgs
		await GrantOrganization.bulkCreate(grantsOrgs, {
			transaction
		});

		// one time charge
		await stripe.grantCharge({
			grant,
			stripeToken,
			stripeToken,
			organizations,
			monthly,
			amount,
			user
		});

		// send email
		await sendgrid.paymentReceipt({
			organizations,
			total_amount: actual_total,
			receiver: user.email
		});

		// commit
		await transaction.commit();

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

// Find grants with causes, regions, and organizations by donor_id
exports.findGrantsByDonorId = async (req, res, next) => {
	const donor_id = req.user.id;
	
	try {
		const grants = await db.sequelize.query(`
		Select 
			g.id, 
			g.name,
			g.amount,
			g.monthly,
			g.num_causes,
			g.num_regions,
			g.donor_id,
			g.created_at,
			g.updated_at,
			o.id as organization_id,
			o.primary_cause,
			o.primary_region
			from grants as g
				left join GrantOrganizations as go on go.grant_id = g.id
				left join organizations as o on go.organization_id = o.id
				where donor_id = "0568eef6-f3cb-480b-933c-d32d540bface";
		`, {
			type: db.sequelize.QueryTypes.SELECT
		});

		return res.status(200).json({
			grants
		})
	} catch (error) {
		next(error);
	}
};

exports.deleteGrant = (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));
};