/* Copyright (C) 2012-2013 Denver Gingerich, 

** Copyright (C) 2013-2014, 2020 Bradley M. Kuhn,

** Copyright (C) 2016, 2020 Brett Smith.

** License: GPLv3-or-later

**  Find a copy of GPL at https://sfconservancy.org/GPLv3

*/

"use strict";

var NEW_AMOUNT_EVENT = 'conservancy:newamount';

var flipClass = function(elem, byeClass, hiClass) {

    var classList = elem.classList;

    classList.remove(byeClass);

    classList.add(hiClass);

}

var buildAmountData = function(amountInput) {

    var amountData = {

        minAmount: parseFloat(amountInput.min),

        newAmount: parseFloat(amountInput.value),

    }

    if (amountInput.dataset.oldAmount !== undefined) {

        amountData.oldAmount = parseFloat(amountInput.dataset.oldAmount);

    }

    return amountData;

}

var supportTypeSelector = function(supportTypeHash) {

    return $(supportTypeHash + "Selector");

};

/* We've sometimes published links that say #renew instead of #renewal.

Rewrite that to work as intended. */

if (window.location.hash === "#renew") {

    window.location.hash = "#renewal";

}

function init_sustainer_form_validation () {

    // Forms start in "invalid" form, with the errors shown, so that

    // non-Javascript users see the errors by default and know what they must

    // enter.  Now we hide those for JavaScript users:

    $formCorrectionNeeded.addClass('hidden');

    $('form.supporter-form').each(function(index, form) {

        var $amountInput = $('input[type=number]', form).first();

        var $amountError = $('.form-error', $amountInput.parents('.supporter-form-input'));

        $amountError.on(NEW_AMOUNT_EVENT, function(event, amountData) {

            var isValid = amountData.newAmount >= amountData.minAmount;

            if (amountData.oldAmount === undefined) {

                if (isValid) {

                    $amountError.addClass('hidden');

                } else {

                    flipClass($amountInput[0], 'valid', 'invalid');

                    $amountError.removeClass('hidden');

                }

            } else if (isValid) {

                flipClass($amountInput[0], 'invalid', 'valid');

                $amountError.fadeOut();

            } else if (amountData.oldAmount >= amountData.minAmount) {

                flipClass($amountInput[0], 'valid', 'invalid');

                $amountError.fadeIn();

            }

        });

        $amountInput.on('input', function(event) {

            event.target.classList.remove('invalid');

        }).on('focusout', function(event) {

            var amountInput = event.target;

            var amountData = buildAmountData(amountInput);

            $amountError.trigger(NEW_AMOUNT_EVENT, amountData);

            amountInput.dataset.oldAmount = amountData.newAmount;

        }).trigger('focusout');

        $(form).on('submit', function(event) {

            var amountData = buildAmountData($amountInput[0]);

            if (amountData.newAmount >= amountData.minAmount) {

                $formCorrectionNeeded.addClass('hidden');

            } else {

                $formCorrectionNeeded.removeClass('hidden')

                    .css("font-weight", "bold").css("font-size", "150%");

                event.preventDefault();

            }

        });

    });

}

function init_sustainer_type_switching () {

    var selectSupportType = function(event) {