// ==UserScript==
// @name         Improved RedGIFs
// @namespace    BigDuckie.ImprovedRedgifs
// @version      2025.1.13
// @description  Fix a few annoying "features" and add an easy download button.
// @icon         https://www.google.com/s2/favicons?sz=64&domain=redgifs.com
// @author       Big Duckie
// @copyright    2025, Big Duckie (https://bigduckie.dev)
// @license      MIT
// @match        https://*.redgifs.com
// @match        https://*.redgifs.com/watch/*
// @match        https://*.redgifs.com/niches/*
// @match        https://*.redgifs.com/ifr/*
// @require      https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js
// @require      https://raw.githubusercontent.com/pie6k/jquery.initialize/master/jquery.initialize.min.js
// @grant        GM_addStyle
// @grant        GM_download
// ==/UserScript==

(function () {
    'use strict';
    GM_addStyle(`
    .DLButton {
        background: 0 0;
        border: none;
        cursor: pointer;
        color: var(--white);
        font: var(--s1-medium);
        text-shadow: var(--black) 1px 0 5px;
        text-align: center;
    }

    .embeddedPlayer .buttons .button svg {
        margin-left: 3px;
    }`);

    jQuery.noConflict();

    const play_svg = () => jQuery(document.createElementNS("http://www.w3.org/2000/svg", "svg")).attr({
        width: 24,
        height: 24,
        viewBox: "0 0 24 24",
        fill: "none",
        stroke: "currentColor",
        stroke_width: 2,
        stroke_linecap: "round",
        stroke_linejoin: "round"
    }).html(`<polygon points="5 3 19 12 5 21 5 3"></polygon>`);

    const pause_svg = () => jQuery(document.createElementNS("http://www.w3.org/2000/svg", "svg")).attr({
        width: 24,
        height: 24,
        viewBox: "0 0 24 24",
        fill: "none",
        stroke: "currentColor",
        stroke_width: 2,
        stroke_linecap: "round",
        stroke_linejoin: "round"
    }).html(`<rect x="6" y="4" width="4" height="16"></rect><rect x="14" y="4" width="4" height="16"></rect>`);

    const download_svg = () => jQuery(document.createElementNS("http://www.w3.org/2000/svg", "svg"))
        .attr({
            width: 24,
            height: 24,
            viewBox: "0 0 24 24",
            fill: "none",
            stroke: "currentColor",
            stroke_width: 2,
            stroke_linecap: "round",
            stroke_linejoin: "round"
        }).html(`<path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"></path><polyline points="7 10 12 15 17 10"></polyline><line x1="12" y1="15" x2="12" y2="3"></line>`);

    // Remove overlayer
    jQuery.initialize(".Player-OverLayer", function() {
        this.remove();
    });

    // Watch & Niche pages
    jQuery.initialize(".SideBar", function () {
        const gif_root = jQuery(this).parent().parent();
        let gif_id = gif_root.attr("id").substring(4);

        jQuery(this).find(".SideBar-Item>.rg-button.views").on("click", function () {
            togglePlayer(gif_root.find(".Player-Video>video")[0]);
        }).children("svg").replaceWith(pause_svg());

        jQuery(this).children(".SideBar-Item:has(.FSButton)").after(
            jQuery("<li>", {
                class: "SideBar-Item"
            }).append(
                jQuery("<button>", {
                    class: "DLButton",
                    "aria-label": "download video"
                }).append(download_svg()).on("click", () => {
                    download(gif_id);
                })
            )
        );
    }, { target: jQuery(".previewFeed")[0] });

    jQuery.initialize(".Player-Video>video", function () {
        jQuery(this).on("play", function () {
            jQuery(this).parents(".GifPreview").find(".rg-button.views>svg").replaceWith(play_svg());
        }).on("pause", function () {
            jQuery(this).parents(".GifPreview").find(".rg-button.views>svg").replaceWith(pause_svg());
        });
    }, { target: jQuery(".previewFeed")[0] });

    // IFR pages
    jQuery.initialize(".embeddedPlayer", function () {
        jQuery(this).children(".buttons").prepend(
            jQuery("<div>", {
                class: "button"
            }).append(
                pause_svg().attr({ class: "playButton" })
            ).on("click", () => {
                togglePlayer(jQuery(".videoLink>video")[0]);
            })
        )

        jQuery(this).children(".buttons").append(
            jQuery("<div>", {
                class: "button"
            }).append(
                download_svg()
            ).on("click", () => {
                download(window.location.pathname.split("/")[2])
            })
        )
    }, { target: jQuery(".routeWrapper")[0] });

    jQuery.initialize(".videoLink>video", function () {
        jQuery(this).on("play", function () {
            jQuery(this).parents(".embeddedPlayer").find("svg.playButton").replaceWith(play_svg().attr({ class: "playButton" }));
        }).on("pause", function () {
            jQuery(this).parents(".embeddedPlayer").find("svg.playButton").replaceWith(pause_svg().attr({ class: "playButton" }));
        });
    }, { target: jQuery(".embeddedPlayer")[0] });

    async function togglePlayer(video) {
        video.paused ? video.play() : video.pause();
    }

    async function getToken() {
        let token = localStorage.getItem("userscript_access_token") ?? (await (await fetch("https://api.redgifs.com/v2/auth/temporary")).json()).token;
        let tokenData = JSON.parse(atob(token.split(".")[1].replace('-', '+').replace('_', '/')));
        let unixtime = Math.floor(Date.now() / 1000);

        if (unixtime > tokenData.exp) {
            token = (await (await fetch("https://api.redgifs.com/v2/auth/temporary")).json()).token;
        }

        localStorage.setItem("userscript_access_token", token);
        return token
    }

    async function download(id) {
        let token = await getToken()
        let gif = await (await fetch(`https://api.redgifs.com/v2/gifs/${id}`, { headers: { Authorization: `Bearer ${token}` } })).json()
        let url = gif.gif.urls.hd;
        GM_download(url, url.split("/").pop().split("?")[0]);
    }
})();