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

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

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

** License: GPLv3-or-later

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

*/

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");

};

var $window = $(window);

$window.load(function() {

    /* 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";

    }

    var $selectorLink = supportTypeSelector(window.location.hash);

    if ($selectorLink.length > 0) {

        $window.scrollTop($selectorLink.offset().top);

    }

});

$(document).ready(function() {

    // 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:

    var $formCorrectionNeeded = $('#form-correction-needed');

    $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();

            }

        });

    });

    var selectSupportType = function(event) {

        var $selectedLink = $(event.target);

        $(".supporter-type-selector a").removeClass("supporter-type-selector-selected");

        $selectedLink.addClass("supporter-type-selector-selected");

        $(".supporter-type-selection").hide();

        $(event.target.hash).show();

        $formCorrectionNeeded.addClass('hidden');

        return false;

    };

    $(".supporter-type-selector a").bind("click", selectSupportType);

    var selectSupportTypeFromHash = function() {

        return supportTypeSelector(window.location.hash).click();

    };

    $window.bind("hashchange", selectSupportTypeFromHash);

    if (selectSupportTypeFromHash().length === 0) {

        supportTypeSelector("#annual").click();

    }

    $('a.read-more').each(function(index, readmore) {

        var $readmore = $(readmore)

        var $content = $(readmore.hash);

        var $header = $content.prev('h3');

        if (($header.length && $header[0].id === want_id) || readmore.id === want_id) {

            $readmore.hide();

        } else {

            $content.hide();

            $readmore.on('click', function(event) {

                $readmore.fadeOut('fast', function() {

                    $readmore.replaceWith($content);

                    $content.fadeIn('fast');

                });

            });

        }

    });

});