// ==UserScript==
// @name        Yet Another Reddit Comment Overwriter
// @namespace   https://github.com/adriantache/YARCO/
// @description Local script to overwrite all your comments with random ASCII characters and delete them. This works because Reddit doesn't store editing history, so technically this is the only way to obfuscate the contents of the comments. Based on Reddit Overwrite script v.1.4.8.
// @include     https://*.reddit.com/*
// @include     http://*.reddit.com/*
// @version     0.1
// @run-at      document-start
// ==/UserScript==

// TODO separate overwrite and delete
// TODO only delete comments older than a day
// TODO only delete comments from a certain subreddit
// TODO check feedback for Reddit Overwrite for extra features

unsafeWindow.to_delete = [];
unsafeWindow.num_user_comments = 0;
unsafeWindow.deleted = 0;
unsafeWindow.span = '';
unsafeWindow.user = '';

window.addEventListener("DOMContentLoaded", add_delete_links, false);

function add_delete_links(ev) {
    unsafeWindow.user = document.querySelector("span.user > a:not(.login-required)").innerHTML;
    if (!unsafeWindow.user) {
        return;
    }
    var comments = document.querySelectorAll("a.author");
    unsafeWindow.num_user_comments = 0;
    for (var i = 0; i < comments.length; i++) {
        if (comments[i].innerHTML != unsafeWindow.user) 
            continue;
        

        try {
            var main_parent = comments[i].parentNode.parentNode;
            var thing_id = main_parent.querySelector("form > input[name='thing_id']").value;
            var list = main_parent.querySelector("ul.flat-list");
            if (list.querySelector("li.secure_delete")) 
                continue;
            

            unsafeWindow.num_user_comments ++;

            var addedlink = document.createElement("li");
            addedlink.setAttribute('class', 'secure_delete');
            var dlink = document.createElement("a");
            dlink.setAttribute('class', 'bylink secure_delete');
            dlink.setAttribute('onClick', 'javascript:var ret = overwrite_comment("' + thing_id + '", false);');
            dlink.setAttribute('href', 'javascript:void(0)');
            dlink.appendChild(document.createTextNode('SECURE DELETE'));
            addedlink.appendChild(dlink);
            main_parent.querySelector("ul.flat-list").appendChild(addedlink);
        } catch (e) {
            alert("Error adding Secure Delete links to comments.\nError: " + e + " Stack:" + e.stack);
        }
    }

    unsafeWindow.span = document.createElement("span");
    unsafeWindow.span.setAttribute('class', 'nextprev secure_delete_all');
    UpdateDeleteAllSpan();

}

// append buttons to page
function UpdateDeleteAllSpan() {
    if (unsafeWindow.num_user_comments) {
        unsafeWindow.span.innerHTML = "";

        // make Delete All link
        var dlink = document.createElement("a");
        dlink.setAttribute('class', 'bylink');
        dlink.setAttribute('onClick', 'javascript:return delete_all()');
        dlink.setAttribute('href', 'javascript:void(0)');
        dlink.style.marginRight = "10px";
        dlink.appendChild(document.createTextNode('OVERWRITE AND DELETE ALL COMMENTS'));
        unsafeWindow.span.appendChild(dlink);

        // make Overwrite All link
        var olink = document.createElement("a");
        olink.setAttribute('class', 'bylink');
        olink.setAttribute('onClick', 'javascript:return overwrite_all()');
        olink.setAttribute('href', 'javascript:void(0)');
        dlink.style.marginRight = "10px";
        olink.appendChild(document.createTextNode('OVERWRITE ALL COMMENTS'));
        unsafeWindow.span.appendChild(olink);

        document.querySelector("div.content").insertBefore(unsafeWindow.span, document.querySelector("div.content").firstChild);
    } else if (unsafeWindow.span != null) {
        unsafeWindow.span.style.display = 'none';
    }
}

// TODO add method just for deleting all
unsafeWindow.delete_all = function () {
    try {
        unsafeWindow.num_user_comments = 0;
        unsafeWindow.deleted = 0;
        unsafeWindow.to_delete = [];
        var comments = document.querySelectorAll("a.author");

        for (var i = 0; i < comments.length; i++) {
            if (comments[i].innerHTML != unsafeWindow.user) 
                continue;
            

            var thing_id = comments[i].parentNode.parentNode.querySelector("form.usertext > input[name='thing_id']").value;
            if (unsafeWindow.to_delete.indexOf(thing_id) == -1) {
                unsafeWindow.to_delete.push(thing_id);
                unsafeWindow.num_user_comments ++;
            }
        }

        unsafeWindow.span.innerHTML = "TRYING TO Overwrite COMMENT 1 OF " + unsafeWindow.num_user_comments;
        var next_thing_id = unsafeWindow.to_delete.pop();
        unsafeWindow.overwrite_comment(next_thing_id, true);
    } catch (e) {
        alert("YOU ARE MOST LIKELY NOT ON THE COMMENTS TAB! /n/n Error trying to delete all your comments.\nError: " + e + " Stack:" + e.stack);
        unsafeWindow.location.reload()
    }
};

// TODO write this function
unsafeWindow.overwrite_all = function () {
    try {
        unsafeWindow.num_user_comments = 0;
        unsafeWindow.deleted = 0;
        unsafeWindow.to_delete = [];
        var comments = document.querySelectorAll("a.author");

        for (var i = 0; i < comments.length; i++) {
            if (comments[i].innerHTML != unsafeWindow.user) 
                continue;
            

            var thing_id = comments[i].parentNode.parentNode.querySelector("form.usertext > input[name='thing_id']").value;
            if (unsafeWindow.to_delete.indexOf(thing_id) == -1) {
                unsafeWindow.to_delete.push(thing_id);
                unsafeWindow.num_user_comments ++;
            }
        }

        unsafeWindow.span.innerHTML = "TRYING TO Overwrite COMMENT 1 OF " + unsafeWindow.num_user_comments;
        var next_thing_id = unsafeWindow.to_delete.pop();
        unsafeWindow.overwrite_comment(next_thing_id, true);
    } catch (e) {
        alert("YOU ARE MOST LIKELY NOT ON THE COMMENTS TAB! /n/n Error trying to delete all your comments.\nError: " + e + " Stack:" + e.stack);
        unsafeWindow.location.reload()
    }
};

unsafeWindow.delete_comment = function (thing_id, from_delete_all) {
    try {
        var thing = document.querySelector("input[name='thing_id'][value='" + thing_id + "']");

        var status = thing.parentNode.querySelector("div.usertext-edit > div.bottom-area > div.usertext-buttons > span.status").innerHTML;

        var error = false;
        if ((status.indexOf("error") != -1) || (status.indexOf("submitting") != -1)) {
            error = true;
        } else {
            var del_form = thing.parentNode.parentNode.querySelector("ul.buttons > li > form.del-button");
            unsafeWindow.toggle(del_form.querySelector("span.main > a"));
            del_form.querySelector("span.error > a.yes").click();
            unsafeWindow.deleted ++;
        }

        if (from_delete_all) {
            if (unsafeWindow.to_delete.length != 0) {
                unsafeWindow.span.innerHTML = "OVERWRITING COMMENT " + (
                    unsafeWindow.deleted + 1
                ) + " OF " + unsafeWindow.num_user_comments;
                var next_thing_id = unsafeWindow.to_delete.pop();
                unsafeWindow.setTimeout(unsafeWindow.overwrite_comment, 2000, next_thing_id, from_delete_all);
            } else {
                if (unsafeWindow.num_user_comments - unsafeWindow.deleted != 0) {
                    unsafeWindow.num_user_comments = unsafeWindow.num_user_comments - unsafeWindow.deleted;
                    UpdateDeleteAllSpan();
                    unsafeWindow.span.innerHTML = "<span>Failed to overwrite " + unsafeWindow.num_user_comments + " comments</span><br>" + unsafeWindow.span.innerHTML;
                } else {
                    unsafeWindow.span.style.display = 'none';
                }
            }
        } else {
            if (error) {
                alert("Failed to overwrite your comment. Overwrite aborted.");
            } else {
                unsafeWindow.num_user_comments --;
            }
            UpdateDeleteAllSpan();
        }
        return(error ? -1 : 0);
    } catch (er) {
        alert(er);
        if (from_delete_all) 
            unsafeWindow.location.reload();
        

        return -99;
    }
}

unsafeWindow.overwrite_comment = function (thing_id, from_delete_all) {
    try {
        var edit_form = document.querySelector("input[name='thing_id'][value='" + thing_id + "']").parentNode;

        edit_form.querySelector("div.usertext-edit > div.bottom-area > div.usertext-buttons > button.cancel").click();


        var edit_btn = edit_form.parentNode.querySelector("ul > li > a.edit-usertext");
        if (edit_btn) 
            edit_btn.click();
        

        var edit_textbox = edit_form.querySelector("div.usertext-edit > div > textarea");
        var repl_str = '';
        var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz><.-,+!#$%^&*();:[]~";
        for (var x = 0; x < edit_textbox.value.length; x++) {
            if (edit_textbox.value.substr(x, 1) == '\n') {
                repl_str += '\n';
            } else {
                var rnum = Math.floor(Math.random() * chars.length);
                repl_str += chars.charAt(rnum, 1);
            }
        }

        edit_textbox.value = repl_str;
        //        var sumting = '^^^^^^^^^^^^^^^^' + Math.random();
        //      var sumtingtr = sumting.substring(0,22);

        //    var sumting2 = '' + Math.random();
        // var sumtingtr2 = sumting2.substring(2,7);


        // edit_textbox.value = sumtingtr + sumtingtr2;

        edit_form.querySelector("div.usertext-edit > div.bottom-area > div.usertext-buttons > button.save").click();
        unsafeWindow.setTimeout(unsafeWindow.delete_comment, 2000, thing_id, from_delete_all);
        return 0;
    } catch (e) {
        alert("Error interacting with overwrite form: " + e);
        return -99;
    }
};