$(function () {
    function get_form_input(form_name, input_name, stringify = true) {
        var input = $("#" + form_name + "-form input[name='" + input_name + "']");
        var val;
        if (input.attr('type') === "radio") {
            val =  $("#" + form_name + "-form input[name='" + input_name + "']:checked").val();
        } else {
            val = input.val();
        }
        if (stringify) {
            return JSON.stringify(val);
        }
        return val;
    }

    function is_in_array(value, array) {
        return array.indexOf(value) > -1;
    }

    function create_ajax_request(url, form_name, stripe_token = null) {
        var form = $("#" + form_name + "-form");
        var form_loading_indicator = "#" + form_name + "_loading_indicator";
        var form_input_section = "#" + form_name + "-input-section";
        var form_success = "#" + form_name + "-success";
        var form_error = "#" + form_name + "-error";
        var form_loading = "#" + form_name + "-loading";

        var numeric_inputs = ["licenses"];

        loading.make_indicator($(form_loading_indicator),
                               {text: 'Processing ...', abs_positioned: true});
        $(form_input_section).hide();
        $(form_error).hide();
        $(form_loading).show();

        var data = {};
        if (stripe_token) {
            data.stripe_token = JSON.stringify(stripe_token.id);
        }

        form.serializeArray().forEach(function (item) {
            if (is_in_array(item.name, numeric_inputs)) {
                data[item.name] = item.value;
            } else {
                data[item.name] = JSON.stringify(item.value);
            }
        });

        $.post({
            url: url,
            data: data,
            success: function () {
                $(form_loading).hide();
                $(form_error).hide();
                $(form_success).show();
                location.reload();
            },
            error: function (xhr) {
                $(form_loading).hide();
                $(form_error).show().text(JSON.parse(xhr.responseText).msg);
                $(form_input_section).show();
            },
        });
    }

    if (window.location.pathname === '/billing/') {
        var stripe_key = $("#payment-method").data("key");
        var card_change_handler = StripeCheckout.configure({ // eslint-disable-line no-undef
            key: stripe_key,
            image: '/static/images/logo/zulip-icon-128x128.png',
            locale: 'auto',
            token: function (stripe_token) {
                create_ajax_request("/json/billing/sources/change", "cardchange", stripe_token = stripe_token);
            },
        });

        $('#update-card-button').on('click', function (e) {
            var email = $("#payment-method").data("email");
            card_change_handler.open({
                name: 'Zulip',
                zipCode: true,
                billingAddress: true,
                panelLabel: "Update card",
                email: email,
                label: "Update card",
                allowRememberMe: false,
            });
            e.preventDefault();
        });
    }

    var hash = window.location.hash;
    if (hash) {
        $('#billing-tabs.nav a[href="' + hash + '"]').tab('show');
        $('#upgrade-tabs.nav a[href="' + hash + '"]').tab('show');
        $('html,body').scrollTop(0);
    }

    $('#billing-tabs.nav-tabs a').click(function () {
        $(this).tab('show');
        window.location.hash = this.hash;
        $('html,body').scrollTop(0);
    });

    $('#upgrade-tabs.nav-tabs a').click(function () {
        $(this).tab('show');
        window.location.hash = this.hash;
        $('html,body').scrollTop(0);
    });

    function format_money(cents) {
        // allow for small floating point errors
        cents = Math.ceil(cents - 0.001);
        var precision;
        if (cents % 100 === 0) {
            precision = 0;
        } else {
            precision = 2;
        }
        // TODO: Add commas for thousands, millions, etc.
        return (cents / 100).toFixed(precision);
    }

    if (window.location.pathname === '/upgrade/') {
        var add_card_handler = StripeCheckout.configure({ // eslint-disable-line no-undef
            key: $("#autopay-form").data("key"),
            image: '/static/images/logo/zulip-icon-128x128.png',
            locale: 'auto',
            token: function (stripe_token) {
                create_ajax_request("/json/billing/upgrade", "autopay", stripe_token = stripe_token);
            },
        });

        $('#add-card-button').on('click', function (e) {
            var license_management = get_form_input("autopay", "license_management", false);
            if ($("#" + license_management + "_license_count")[0].checkValidity() === false) {
                return;
            }
            add_card_handler.open({
                name: 'Zulip',
                zipCode: true,
                billingAddress: true,
                panelLabel: "Make payment",
                email: $("#autopay-form").data("email"),
                label: "Add card",
                allowRememberMe: false,
                description: "Zulip Cloud Standard",
            });
            e.preventDefault();
        });

        $("#invoice-button").on("click", function (e) {
            if ($("#invoiced_licenses")[0].checkValidity() === false) {
                return;
            }
            e.preventDefault();
            create_ajax_request("/json/billing/upgrade", "invoice");
        });

        var prices = {};
        prices.annual = page_params.annual_price * (1 - page_params.percent_off / 100);
        prices.monthly = page_params.monthly_price * (1 - page_params.percent_off / 100);

        function update_charged_amount(schedule) {
            $("#charged_amount").text(
                format_money(page_params.seat_count * prices[schedule])
            );
        }

        function show_license_section(license) {
            $("#license-automatic-section").hide();
            $("#license-manual-section").hide();
            $("#license-mix-section").hide();

            $("#automatic_license_count").prop('disabled', true);
            $("#manual_license_count").prop('disabled', true);
            $("#mix_license_count").prop('disabled', true);

            var section_id = "#license-" + license + "-section";
            $(section_id).show();
            var input_id = "#" + license + "_license_count";
            $(input_id).prop("disabled", false);
        }

        $('input[type=radio][name=license_management]').change(function () {
            show_license_section($(this).val());
        });

        $('input[type=radio][name=schedule]').change(function () {
            update_charged_amount($(this).val());
        });

        $("#autopay_annual_price").text(format_money(prices.annual));
        $("#autopay_annual_price_per_month").text(format_money(prices.annual / 12));
        $("#autopay_monthly_price").text(format_money(prices.monthly));
        $("#invoice_annual_price").text(format_money(prices.annual));
        $("#invoice_annual_price_per_month").text(format_money(prices.annual / 12));

        show_license_section($('input[type=radio][name=license_management]:checked').val());
        update_charged_amount($('input[type=radio][name=schedule]:checked').val());
    }
});