/*
 * 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, apiDelete, apiGet, apiPost, parseParams, setupHeader, timeString } from "/global.js";

(function()
{
	// Element names specific to this page
	elements.active = "active";
	elements.address = "address";
	elements.balance = "balance";
	elements.balanceNegative = "balance-negative";
	elements.balancePositive = "balance-positive";
	elements.balanceStatus = "balance-status";
	elements.billingActivity = "billing-activity";
	elements.current = "current";
	elements.defaultPrefix = "default-payment-";
	elements.deletePrefix = "delete-payment-";
	elements.email = "email";
	elements.gdpr = "gdpr";
	elements.gdprDate = "gdpr-date";
	elements.info = "info";
	elements.lmcRow = "lmc-tr1";
	elements.lmcRowAlt = "lmc-tr2";
	elements.lmcRowStandard = "lmc-tr3";
	elements.managed = "managed";
	elements.managedButton = "managed-button";
	elements.pay = "pay";
	elements.paymentMethods = "payment-methods";
	elements.promotions = "promotions";
	elements.promotionsTable = "promotions-table";
	elements.uninvoiced = "uninvoiced";
	elements.uninvoicedBalance = "uninvoiced-balance";

	// Data received from API calls
	var data = {};
	data.account = {};
	data.invoices = [];
	data.numLinodes = 0;
	data.paymentMethods = [];
	data.payments = [];

	// Static references to UI elements
	var ui = {};
	ui.active = {};
	ui.address = {};
	ui.balance = {};
	ui.balanceStatus = {};
	ui.billingActivity = {};
	ui.current = {};
	ui.email = {};
	ui.gdpr = [];
	ui.gdprDate = {};
	ui.managed = {};
	ui.managedButton = {};
	ui.pay = {};
	ui.paymentMethods = {};
	ui.promotions = [];
	ui.promotionsTable = {};
	ui.uninvoiced = {};
	ui.uninvoicedBalance = {};

	// Temporary state
	var state = {};
	state.haveInvoices = false;
	state.havePayments = false;

	// Creates a row for the payment methods table
	var createMethodRow = function(method)
	{
		var typeNames = {
			"credit_card": "Credit Card",
			"google_pay": "Google Pay",
			"paypal": "PayPal"
		};

		var row = document.createElement("tr");
		row.className = elements.lmcRowStandard;

		var type = document.createElement("td");
		if (typeNames[method.type])
			type.innerHTML = typeNames[method.type];
		else
			type.innerHTML = method.type;
		row.appendChild(type);

		var details = document.createElement("td");
		if (method.type == "credit_card" || method.type == "google_pay") {
			var ccInfo = document.createElement("span");
			ccInfo.innerHTML = method.data.card_type + " xxxxxxxxxxxx" + method.data.last_four + " Exp: " + method.data.expiry;
			var br = document.createElement("br");
			details.appendChild(ccInfo);
			details.appendChild(br);
			var monthYear = method.data.expiry.split("/");
			var expireDate = new Date(parseInt(monthYear[1]), parseInt(monthYear[0]), 0);
			var now = new Date();
			if (expireDate - now > 0) {
				var duration = document.createElement("span");
				duration.innerHTML = "Expires " + timeString(now - expireDate, true);
				details.appendChild(duration);
			} else {
				var expired = document.createElement("strong");
				expired.innerHTML = "Expired!";
				details.appendChild(expired);
			}
		} else if (method.type == "paypal") {
			var email = document.createElement("span");
			email.innerHTML = method.data.email;
			details.appendChild(email);
		}
		row.appendChild(details);

		var options = document.createElement("td");
		if (method.is_default) {
			var defaultMsg = document.createElement("strong");
			defaultMsg.innerHTML = "This is the default payment method";
			options.appendChild(defaultMsg);
		} else {
			var defaultLink = document.createElement("a");
			defaultLink.id = elements.defaultPrefix + method.id;
			defaultLink.href = "#";
			defaultLink.innerHTML = "Make default";
			defaultLink.addEventListener("click", defaultMethod);
			var separator = document.createElement("span");
			separator.innerHTML = " | ";
			var deleteLink = document.createElement("a");
			deleteLink.id = elements.deletePrefix + method.id;
			deleteLink.href = "#";
			deleteLink.innerHTML = "Delete";
			deleteLink.addEventListener("click", deleteMethod);
			options.appendChild(defaultLink);
			options.appendChild(separator);
			options.appendChild(deleteLink);
		}
		row.appendChild(options);

		return row;
	};

	// Creates a row for the promotion table
	var createPromoRow = function(promo)
	{
		var row = document.createElement("tr");
		row.className = elements.lmcRowStandard;

		var name = document.createElement("td");
		name.innerHTML = promo.summary;
		row.appendChild(name);

		var details = document.createElement("td");
		var line1 = document.createElement("span");
		var expire = new Date(promo.expire_dt + "Z");
		line1.innerHTML = "$" + promo.credit_remaining + " remaining. Exp: " + expire.toLocaleDateString();
		var br = document.createElement("br");
		var line2 = document.createElement("span");
		line2.innerHTML = "($" + promo.this_month_credit_remaining + " remaining this month. Monthly cap: $" + promo.credit_monthly_cap + ")";
		details.appendChild(line1);
		details.appendChild(br);
		details.appendChild(line2);
		row.appendChild(details);

		var description = document.createElement("td");
		description.className = elements.info;
		description.innerHTML = promo.description;
		row.appendChild(description);

		return row;
	};

	// Creates a row for the recent activity table
	var createRecentRow = function(recent, alt)
	{
		var row = document.createElement("tr");
		if (alt)
			row.className = elements.lmcRowAlt;
		else
			row.className = elements.lmcRow;

		var dateCell = document.createElement("td");
		var date = document.createElement("span");
		var recentDate = new Date(recent.date + "Z");
		var now = new Date();
		date.innerHTML = recentDate.toLocaleDateString();
		var br = document.createElement("br");
		var ago = document.createElement("span");
		ago.className = elements.info;
		ago.innerHTML = timeString(now - recentDate, true);
		dateCell.appendChild(date);
		dateCell.appendChild(br);
		dateCell.appendChild(ago);
		row.appendChild(dateCell);

		if (recent.label) {
			// Invoice stuff
			var linkCell = document.createElement("td");
			var link = document.createElement("a");
			link.href = "/account/invoice?iid=" + recent.id;
			link.innerHTML = recent.label;
			linkCell.appendChild(link);
			row.appendChild(linkCell);

			var total = document.createElement("td");
			if (recent.total < 0)
				total.innerHTML = "($" + (-recent.total).toFixed(2) + ")";
			else
				total.innerHTML = "$" + recent.total.toFixed(2);
			row.appendChild(total);
		} else {
			// Payment stuff
			var thanks = document.createElement("td");
			thanks.innerHTML = "Payment. Thank you";
			row.appendChild(thanks);

			var total = document.createElement("td");
			if (total > 0)
				total.innerHTML = "($" + recent.total.toFixed(2) + ")";
			else
				total.innerHTML = "$" + (-recent.total).toFixed(2);
			row.appendChild(total);
		}

		return row;
	};

	// Handler for making a payment method default
	var defaultMethod = function(event)
	{
		var id = event.currentTarget.id.slice(elements.defaultPrefix.length);
		if (!confirm("Make this the default payment method?"))
			return;

		apiPost("/account/payment-methods/" + id + "/make-default", {}, function(response)
		{
			location.reload();
		});
	};

	// Handler for deleting a payment method
	var deleteMethod = function(event)
	{
		var id = event.currentTarget.id.slice(elements.deletePrefix.length);
		if (!confirm("Delete this payment method?"))
			return;

		apiDelete("/account/payment-methods/" + id, function(response)
		{
			location.reload();
		});
	};

	// Callback for account details API call
	var displayAccount = function(response)
	{
		data.account = response;

		// Contact info
		var br = document.createElement("br");
		if (data.account.company.length) {
			var company = document.createElement("span");
			company.innerHTML = data.account.company;
			ui.address.appendChild(company);
			ui.address.appendChild(br);
		}
		var name = document.createElement("span");
		name.innerHTML = data.account.first_name + " " + data.account.last_name;
		ui.address.appendChild(name);
		ui.address.appendChild(br.cloneNode(true));
		var address1 = document.createElement("span");
		address1.innerHTML = data.account.address_1;
		ui.address.appendChild(address1);
		ui.address.appendChild(br.cloneNode(true));
		if (data.account.address_2.length) {
			var address2 = document.createElement("span");
			address2.innerHTML = data.account.address_2;
			ui.address.appendChild(address2);
			ui.address.appendChild(br.cloneNode(true));
		}
		var address3 = document.createElement("span");
		address3.innerHTML = data.account.city + ", " + data.account.state + " " + data.account.zip;
		ui.address.appendChild(address3);

		// Email
		ui.email.innerHTML = data.account.email;

		// Account balance
		if (data.account.balance == 0) {
			ui.balance.className = elements.balancePositive;
			ui.current.innerHTML = "Your account is current.";
		} else if (data.account.balance < 0) {
			ui.balance.className = elements.balancePositive;
			ui.balanceStatus.innerHTML = " credit";
			ui.current.innerHTML = "This will be applied towards future invoices.";
			data.account.balance = -data.account.balance;
		} else {
			ui.balance.className = elements.balanceNegative;
			ui.balanceStatus.innerHTML = " due ";
			ui.pay.href += "?amount=" + (-data.account.balance);
			ui.pay.style.display = "initial";
			ui.current.innerHTML = "Please pay now to avoid any service interruptions.";
		}
		ui.balance.innerHTML = "$" + data.account.balance.toFixed(2);
		ui.uninvoicedBalance.innerHTML = "$" + data.account.balance_uninvoiced.toFixed(2);
		if (data.account.balance_uninvoiced > 0)
			ui.uninvoiced.style.display = "table-row";

		// Promotions
		if (data.account.active_promotions.length) {
			for (var i = 0; i < ui.promotions.length; i++)
				ui.promotions[i].style.display = "table-row-group";
		}
		for (var i = 0; i < data.account.active_promotions.length; i++)
			ui.promotionsTable.appendChild(createPromoRow(data.account.active_promotions[i]));

		var active = new Date(data.account.active_since + "Z");
		ui.active.innerHTML = active.toLocaleDateString();
	};

	// Callback for invoices API call
	var displayInvoices = function(response)
	{
		data.invoices = data.invoices.concat(response.data);

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

		state.haveInvoices = true;
		if (state.havePayments)
			displayRecent();
	};

	// Callback for linodes API call
	var displayLinodes = function(response)
	{
		data.numLinodes = response.results;
		ui.managedButton.disabled = false;
	};

	// Callback for payment methods API call
	var displayMethods = function(response)
	{
		data.paymentMethods = data.paymentMethods.concat(response.data);

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

		for (var i = 0; i < data.paymentMethods.length; i++)
			ui.paymentMethods.appendChild(createMethodRow(data.paymentMethods[i]));
	};

	// Callback for payments API call
	var displayPayments = function(response)
	{
		data.payments = data.payments.concat(response.data);

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

		state.havePayments = true;
		if (state.haveInvoices)
			displayRecent();
	};

	// Populates table with recent invoices and payments
	var displayRecent = function()
	{
		// Combine to single array and sort by date
		var recent = data.invoices.concat(data.payments);
		recent.sort(function(a, b)
		{
			var aDate = new Date(a.date + "Z");
			var bDate = new Date(b.date + "Z");
			return aDate - bDate;
		});

		// Insert items into table
		for (var i = recent.length - 1, count = 0; i >= 0, count < 4; i--, count++)
			ui.billingActivity.appendChild(createRecentRow(recent[i], ui.billingActivity.children.length % 2));
	};

	// Callback for account settings API call
	var displaySettings = function(response)
	{
		// Show managed signup if not managed
		if (!response.managed)
			ui.managed.style.display = "table";
	};

	// Click handler for managed button
	var handleManaged = function(event)
	{
		if (event.currentTarget.disabled)
			return;

		if (!confirm("Linode Managed costs an additional $100/mo per Linode. This will increase your projected monthly bill by $" + (data.numLinodes * 100) + ". Are you sure?"))
			return;

		apiPost("/account/settings/managed-enable", {}, function(response)
		{
			location.reload();
		});
	};

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

		setupHeader();

		// Get element references
		ui.active = document.getElementById(elements.active);
		ui.address = document.getElementById(elements.address);
		ui.balance = document.getElementById(elements.balance);
		ui.balanceStatus = document.getElementById(elements.balanceStatus);
		ui.billingActivity = document.getElementById(elements.billingActivity);
		ui.current = document.getElementById(elements.current);
		ui.email = document.getElementById(elements.email);
		ui.gdpr = document.getElementsByClassName(elements.gdpr);
		ui.gdprDate = document.getElementById(elements.gdprDate);
		ui.managed = document.getElementById(elements.managed);
		ui.managedButton = document.getElementById(elements.managedButton);
		ui.pay = document.getElementById(elements.pay);
		ui.paymentMethods = document.getElementById(elements.paymentMethods);
		ui.promotions = document.getElementsByClassName(elements.promotions);
		ui.promotionsTable = document.getElementById(elements.promotionsTable);
		ui.uninvoiced = document.getElementById(elements.uninvoiced);
		ui.uninvoicedBalance = document.getElementById(elements.uninvoicedBalance);

		// Register event handlers
		ui.managedButton.addEventListener("click", handleManaged);

		// Get data from API
		apiGet("/account", displayAccount, null);
		apiGet("/account/settings", displaySettings, null);
		apiGet("/account/invoices", displayInvoices, null);
		apiGet("/account/payments", displayPayments, null);
		apiGet("/account/payment-methods", displayMethods, null);
		apiGet("/linode/instances", displayLinodes, null);
	};

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