// ==UserScript==
// @name         VoidVerified
// @namespace    http://tampermonkey.net/
// @version      0.3.4
// @description  Display a verified sign next to user's name in AniList.
// @author       voidnyan
// @match        https://anilist.co/*
// @grant        none
// @license MIT
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';
    const version = "0.3.4";
    const evaluationIntervalInSeconds = 1;
    const localStorageColors = "void-verified-colors";

    const verified = {
        copyColorFromProfile: false,
        username: {
            enabled: true,
            enabledForReplies: true,
            enabledForProfileName: true,
            color: "white",
            sign: "✔",
        },
        highlight: {
            enabled: true,
            enabledForReplies: true,
            enabledForSmallCards: false,
            color: undefined,
            size: "5px",
        }
    };

    const shouldIntervalBeUsed = verified.username.enabledForProfileName || verified.highlight.enabled;

    let verifiedUsers = [
        {
            username: "voidnyan",
            sign: "💻",
        },
    ]
    .map(u => typeof u === "string" ? {username: u} : u);

    const colorsInLocalStorage = JSON.parse(localStorage.getItem(localStorageColors));

    if (colorsInLocalStorage !== null) {
        verifiedUsers = verifiedUsers.map(u => colorsInLocalStorage !== null && u.color ? u : {
            ...u,
            color: colorsInLocalStorage.find(c => c.username === u.username)?.color
        });
    }

    let usernameStyles = "";
    let highlightStyles = "";

    createStyles();

    function createStyles(){
        usernameStyles = "";
        highlightStyles = "";
        for (const user of verifiedUsers){
            if (verified.username.enabled) {
                createUsernameCSS(user);
            }

            if (verified.highlight.enabled) {
                createHighlightCSS(user, `div.wrap:has( div.header > a.name[href*="${user.username}"] )`);
                createHighlightCSS(user, `div.wrap:has( div.details > a.name[href*="${user.username}"] )`);
            }

            if (verified.highlight.enabledForReplies) {
                createHighlightCSS(user, `div.reply:has( a.name[href*="${user.username}"] )`);
            }
        }

        if (verified.highlight.enabled && !verified.highlight.enabledForSmallCards) {
            disableHighlightOnSmallCards();
        }
    }

    function createUsernameCSS(user) {
        usernameStyles += `
            a.name[href*="${user.username}"]::after {
                content: "${user.sign ?? verified.username.sign}";
                color: ${user.color ?? verified.username.color ?? "rgb(var(--color-blue))"}
            }
            `;
    };

    function createHighlightCSS(user, selector){
        highlightStyles += `
            ${selector} {
                margin-right: -${verified.highlight.size};
                border-right: ${verified.highlight.size} solid ${user.color ?? verified.highlight.color ?? "rgb(var(--color-blue))"};
                border-radius: 5px;
            }
            `;
    }

    function disableHighlightOnSmallCards(){
        highlightStyles += `
            div.wrap:has(div.small) {
            margin-right: 0px !important;
            border-right: 0px solid black !important;
            }
            `;
    }

    const usernameLink = createStyleLink(usernameStyles, "username");
    const highlightLink = createStyleLink(highlightStyles, "highlight");
    const profileLink = createStyleLink("", "profile");

    function refreshHomePage(){
        if (!verified.highlight.enabled) {
            return;
        }

        const oldHighlightLink = document.getElementById("void-verified-highlight-styles");
        const newHighlightLink = createStyleLink(highlightStyles, "highlight");
        oldHighlightLink.remove();

    }

    function verifyProfile(){
        if (!verified.username.enabledForProfileName) {
            return;
        }

        const usernameHeader = document.querySelector("h1.name");
        const username = usernameHeader.innerHTML.trim();

        const user = verifiedUsers.find(u => u.username === username);
        if (!user){
            profileLink.href = 'data:text/css;charset=UTF-8,' + encodeURIComponent("");
            return;
        }

        copyUserColor(user, usernameHeader);

        const profileStyle = `
                h1.name::after {
                content: "${user.sign ?? verified.username.sign}"
                }
            `;
        profileLink.href = 'data:text/css;charset=UTF-8,' + encodeURIComponent(profileStyle);
    }

    function copyUserColor(user, header) {
        if (user.copyColorFromProfile === false || !user.copyColorFromProfile && !verified.copyColorFromProfile) {
            return;
        }

        const color = getComputedStyle(header).getPropertyValue('--color-blue');
        user.color = `rgb(${color})`;
        verifiedUsers = verifiedUsers.map(u => u.username !== user.username ? u : user);

        createStyles();

        const oldHighlightLink = document.getElementById("void-verified-highlight-styles");
        const newHighlightLink = createStyleLink(highlightStyles, "highlight");
        oldHighlightLink.remove();

        const oldUsernameLink = document.getElementById("void-verified-username-styles");
        const newUsernameLink = createStyleLink(highlightStyles, "username");
        oldUsernameLink.remove();

        addOrUpdateColorToLocalStorage(user);
    }

    function addOrUpdateColorToLocalStorage(user) {
        let localColors = JSON.parse(localStorage.getItem(localStorageColors));

        if (localColors === null) {
            localStorage.setItem(localStorageColors, JSON.stringify([{username: user.username, color: user.color}]));
            return;
        }

        let localStorageUser = localColors.find(u => u.username === user.username);
        if (localStorageUser){
            localStorageUser.color = user.color;
            localColors = localColors.map(u => u.username === localStorageUser.username ? localStorageUser : u);
        } else {
            localColors.push({username: user.username, color: user.color});
        }

        localStorage.setItem(localStorageColors, JSON.stringify(localColors));
    }

    function createStyleLink(styles, id){
        const link = document.createElement('link');
        link.setAttribute('id', `void-verified-${id}-styles`);
        link.setAttribute('rel', 'stylesheet');
        link.setAttribute('type', 'text/css');
        link.setAttribute('href', 'data:text/css;charset=UTF-8,' + encodeURIComponent(styles));
        document.head?.append(link);
        return link;
    }

    let currentPath = "";
    function hasPathChanged(path){
        if (path === currentPath){
            return false;
        }
        currentPath = path;
        return true;
    }

    function handleIntervalScripts(){
        const path = window.location.pathname;


        if (path === "/home") {
            refreshHomePage();
            return;
        }

        if (!hasPathChanged(path)){
            return;
        }

        if (path.startsWith("/user/")){
            verifyProfile();
        }
    }

    if (shouldIntervalBeUsed) {
        setInterval(handleIntervalScripts, evaluationIntervalInSeconds * 1000);
    }

    console.log(`VoidVerified ${version} loaded.`);
})();