// ==UserScript==
// @name         print reddit
// @namespace    reddit
// @include      http*//*reddit.com/*
// @version      0.1
// @description  a few new buttons for reddit: prepare page for printing (or saving) in a better reading streamable format, open all comments and remove side bar.
// @author       caue@cregox.com
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var start = function() {
        var css = `
.side {float: none;}
#siteTable .link.self {margin-right: 0;}
.commentarea.print div {margin-right: 0 !important;}
div.md {max-width: none;}
`;
        $('head').append(`<style type="text/css">@media print {${css}}</style>`);
        var shortlink = document.querySelector('div.shortlink');
        var createButton = function (caption) {
            var div = document.createElement('div');
            div.class = 'printbutton';
            var button = document.createElement('button');
            div.appendChild(button);
            shortlink.parentNode.appendChild(div);
            button.textContent = caption;
            return button;
        };
        $('.commentarea').addClass('print');
        formatForPrinting();
        function formatForPrinting () {
            $(createButton('format for printing')).click(function() {
                $('head').append(`<style type="text/css">${css}</style>`);
            });
        }
        openAllComments();
        function openAllComments () {
            function countComments () {
                return $('.commentarea .comment:visible').length;
            }
            var delay = 500;
            var itemsOpened = 0;
            var button = createButton('open all comments (' + countComments() + ')');
            $(button).click(function() {
                button.disabled = true;
                var item;
                var checkItem = function() {};
                var stuck = 0;
                var interval = setInterval(function() {
                    if (checkItem()) {
                        // still loading
                        if (stuck > 20) {
                            finish();
                            $('span.morecomments a.button.opened:contains("loading")').first().focus();
                        }
                        stuck += 1;
                        return;
                    }
                    if (!item || item.length === 0) {
                        item = $('span.morecomments a.button:visible:not(.opened)').first();
                        checkItem = function() {
                            if (item && !item.is(':visible')){
                                item = null;
                                return false;
                            }
                            return true;
                        };
                    }
                    if (!item || item.length === 0) {
                        item = $('div.collapsed>div>p>a.expand:visible:not(.opened):contains("[+]")'); // all at once, why not?
                        checkItem = function() {
                            item = null;
                            return false;
                        };
                    }
                    if (item && item.length > 0 && item.is(':visible') && !item.is('.opened')) {
                        stuck = 0;
                        item.addClass('opened');
                        itemsOpened += 1;
                        button.textContent = 'openning ' + itemsOpened;
                        item.click();
                        checkItem();
                    } else {
                        finish();
                    }
                }, delay);
                function finish () {
                    button.textContent = 'open all comments (' + countComments() + ')';
                    button.disabled = false;
                    clearInterval(interval);
                }
            });
        }
        removeThisSide();
        function removeThisSide () {
            $(createButton('remove this side')).click(function() {
                $('.side').toggle();
            });
        }
    };

    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.textContent = '(' + start + ')()';
    document.body.appendChild(script);

})();