/*
 * This file is part of Linode Manager Classic.
 *
 * Linode Manager Classic is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Linode Manager Classic is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Linode Manager Classic.  If not, see <https://www.gnu.org/licenses/>.
 */

import { settings, elements, apiGet, parseParams, setupHeader } from "/global.js";

(function()
{
	// Element names specific to this page
	elements.lmcRow = "lmc-tr1";
	elements.lmcRowAlt = "lmc-tr2";
	elements.loading = "loading";
	elements.noPayments = "no-payments";
	elements.paymentsBody = "payments-body";
	elements.subnav = "subnav-link";
	elements.subnavActive = "subnav-link-active";
	elements.total = "total";
	elements.year = "year";

	// Data received from API calls
	var data = {};
	data.payments = [];

	// Static references to UI elements
	var ui = {};
	ui.loading = {};
	ui.noPayments = {};
	ui.paymentsBody = {};
	ui.total = {};
	ui.year = {};

	// Generate a payment table row
	var createPaymentRow = function(payment, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		var description = document.createElement("td");
		description.innerHTML = "Payment. Thank you.";
		row.appendChild(description);

		var date = document.createElement("td");
		var paymentDate = new Date(payment.date + "Z");
		date.innerHTML = paymentDate.toLocaleDateString();
		row.appendChild(date);

		var amount = document.createElement("td");
		amount.innerHTML = "$" + payment.usd.toFixed(2);
		row.appendChild(amount);

		return row;
	};

	// Callback for payments API call
	var displayPayments = function(response)
	{
		// Only add payments from the specified year
		var year = parseInt(data.params.year);
		for (var i = 0; i < response.data.length; i++) {
			var paymentDate = new Date(response.data[i].date + "Z");
			if (paymentDate.getFullYear() == year)
				data.payments.push(response.data[i]);
		}

		// Request the next page if there are more
		if (response.page != response.pages) {
			apiGet("/account/payments?page=" + (response.page + 1), displayPayments, null);
			return;
		}

		ui.loading.remove();
		if (!data.payments.length) {
			ui.noPayments.style.display = "table-row";
			return;
		}

		// Insert payments into table
		var total = 0.0;
		for (var i = 0; i < data.payments.length; i++) {
			total += data.payments[i].usd;
			ui.paymentsBody.appendChild(createPaymentRow(data.payments[i], i % 2));
		}

		ui.total.innerHTML = "$" + total.toFixed(2);
	};

	// Initial setup
	var setup = function()
	{
		// Parse URL parameters
		data.params = parseParams();

		// We need a year, so die if we don't have it
		if (!data.params.year) {
			alert("No payment ID supplied!");
			return;
		} else if (!parseInt(data.params.year)) {
			alert("Supplied year is invalid!");
			return;
		}

		setupHeader();

		// Highlight the remote access subnav link
		var subnavLinks = document.getElementsByClassName(elements.subnav);
		for (var i = 0; i < subnavLinks.length; i++) {
			if (subnavLinks[i].pathname == "/account/billing_history")
				subnavLinks[i].className = elements.subnav + " " + elements.subnavActive;
			else
				subnavLinks[i].className = elements.subnav;
		}

		// Get element references
		ui.loading = document.getElementById(elements.loading);
		ui.noPayments = document.getElementById(elements.noPayments);
		ui.paymentsBody = document.getElementById(elements.paymentsBody);
		ui.total = document.getElementById(elements.total);
		ui.year = document.getElementById(elements.year);

		// Set year
		var year = parseInt(data.params.year);
		ui.year.innerHTML = year;

		// Get data from API
		apiGet("/account/payments", displayPayments, null);
	};

	// Attach onload handler
	window.addEventListener("load", setup);
})();