/* 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");
};

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();
    }
    var want_id = window.location.hash.substr(1) || "do not match any id";
    var $expandable_counts = [];
    // First, build a count of expandable div sections
    $('div.expandable-section').each(function(index, section) {
        var $ourid = $(section).attr('id');
        if ($ourid == undefined) { $ourid = "__global"; }
        $expandable_counts[$ourid] = 0;
    });
    $('div[data-read-more]').each(function(index, readmore) {
        var $readmore = $(readmore)
        var $header = $readmore.prev('h3');
        if ($header.length && $header[0].id === want_id) {
            // Do nothing, leave it alone
        } else {
            var $ourid = $readmore.closest(".expandable-section" ).attr('id');
            if ($ourid == undefined) { $ourid = "__global"; }

            // Set up the link for this specific section using the text from
            // the data-read-more atrribute on the div specific to this section
            var $linkpara = $('<p><a class="read-more"></a></p>');
            var $readlink = $linkpara.children('a');
            $readlink.append($readmore.data('read-more'));
            $readlink.on('click', function(event) {
                // When clicked, we'll restore the actual text and fade it in
                // quickly, and also see if there are any remaining
                // expandable sections left in this particular expandable
                // section.  If none are left, make the "Expand all" button
                // (which lives in an 'a' anchor of the class 'expander') disappear.
                $linkpara.replaceWith($readmore);
                $readmore.fadeIn('fast');
                $expandable_counts[$ourid]--;
                if ($expandable_counts[$ourid] <= 0) {
                  $readmore.closest(".expandable-section" )
                  .children('a.expander').each(function(index, element){
                       $(element).fadeOut('slow');
                  })
                }
            });
            $readmore.hide().replaceWith($linkpara);
            $expandable_counts[$ourid]++;
        }
    });
    // Final two each's enable the "Expand All" link.
    $('a[data-expand-link-text]').each(function(index, element) {
        var $element = $(element);
        $element.append($element.data('expand-link-text'));
    });
    $('.expandable-section').each(function(index) {
        var $expandlink = $(this).find('a.expander');
        var $ourexpandablesection = $(this);
        $expandlink.on('click', function(event) {
            $expandlink.fadeOut('slow');
            $ourexpandablesection.find('.read-more').each(function(index) { $(this).click(); });
        });
    });
});