(function () {
    const BUTTON_ID = "rscord-settings-btn";
    const CONTENT_CONTAINER_ID = "custom-content";
    const SWITCH_CONTAINER_ID = "switch-container";

    const CUSTOM_CSS_ID = "custom-css";
    const CUSTOM_CSS_INPUT_ID = "custom-css-input";

    const CONFIG_KEY = "rscord_config";
    const DEFAULT_CONFIG = { customCss: "", revertStatusIcons: false };

    const CSS_CLASSES = {
        tabItem: "item-3XjbnG",
        selected: "selected-g-kMVV",
        contentColumn: "contentColumn-1C7as6",
        settingsRegion: "sidebarRegion-1VBisG",
        contentRegion: "contentRegion-3HkfJJ",
        settingsSidebar: "standardSidebarView-E9Pc3j",
        title: "colorStandard-1Xxp1s size14-k_3Hy4 h1-34Txb0 title-3hptVQ defaultColor-2cKwKo defaultMarginh1-EURXsm",
        miniTitle: "colorStandard-1Xxp1s size14-k_3Hy4 h5-2RwDNl title-3hptVQ title-1HgbhV",
        hidden: "hidden-27eifz",
        hamburger: "btnHamburger-3GF0_5",
        textInput: "inputDefault-3FGxgL input-2g-os5"
    };

    const STATUS_COLOR_MAP = {
        'hsl(38, calc(var(--saturation-factor, 1) * 95.7%), 54.1%)': '#FAA61A', // Idle (yellow)
        'hsl(0, calc(var(--saturation-factor, 1) * 100%), 71.4%)': '#F04747', // DND (red)
        'hsl(235, calc(var(--saturation-factor, 1) * 85.6%), 64.7%)': '#7289DA', // Away (blue)
        'hsl(0, calc(var(--saturation-factor, 1) * 0%), 47.5%)': '#747F8D', // Offline (gray)
        'hsl(139, calc(var(--saturation-factor, 1) * 47.3%), 43.9%)': '#43B581', // Online (green)
    };

    const IS_MOBILE = window
        .matchMedia("(pointer: coarse)")
        .matches;

    const TAB_CONTENT = `
        <h2 class="${CSS_CLASSES.title}">RSCord Settings</h2>
        <h5 class="${CSS_CLASSES.miniTitle}" style="margin-bottom: 10px">Options</h5>
        <div id="${SWITCH_CONTAINER_ID}"></div>
        <h5 class="${CSS_CLASSES.miniTitle}" style="margin-bottom: 10px">Custom CSS</h5>
        <textarea id="${CUSTOM_CSS_INPUT_ID}" class="${CSS_CLASSES.textInput}" placeholder="CSS goes here" type="text" name="" style="resize: vertical;height: 400px;"></textarea>
    `;

    function loadConfig() {
        try {
            return {
                ...DEFAULT_CONFIG,
                ...JSON.parse(localStorage_.getItem(CONFIG_KEY) || "{}")
            };
        } catch {
            return { ...DEFAULT_CONFIG };
        }
    }

    function saveConfig(patch) {
        const config = loadConfig();
        const updated = { ...config, ...patch };
        localStorage_.setItem(CONFIG_KEY, JSON.stringify(updated));
        return updated;
    }

    async function addSwitches(container) {
        const config = loadConfig();

        container.appendChild(createSwitch(
            "Push Notifications",
            "Sends you notifications even when you close the app",
            "push-notifications",
            await isPushRegistered(),
            async (checked) => {
                const publicKey = window.GLOBAL_ENV.VAPID_KEY;
                if (!publicKey) return false;
                try {
                    checked ? await registerPush(publicKey) : await unregisterPush();
                    return true;
                } catch {
                    return false;
                }
            }
        ));

        container.appendChild(createSwitch(
            "Revert Status Icons",
            "Revert the colorblind status icons added in 2019",
            "revert-status",
            config.revertStatusIcons,
            (checked) => saveConfig({ revertStatusIcons: checked })
        ));
    }

    function revertStatusIcons() {
        const statusRects = document.querySelectorAll('rect[fill^="hsl"]');
        for (const rect of statusRects) {
            const fill = rect.getAttribute("fill");
            if (STATUS_COLOR_MAP[fill]) {
                rect.setAttribute("fill", STATUS_COLOR_MAP[fill]);
            }

            const maskRef = rect.getAttribute("mask");
            if (!maskRef) continue;

            const maskId = maskRef.match(/#([^)]+)/)?.[1];
            if (!maskId) continue;

            const mask = document.getElementById(maskId);
            if (!mask) continue;

            mask.querySelectorAll('[fill="black"]').forEach(el => el.remove());
        }
    }

    function applyCustomCss() {
        const { customCss } = loadConfig();

        let style = document.getElementById(CUSTOM_CSS_ID);
        if (!style) {
            style = document.createElement("style");
            style.id = CUSTOM_CSS_ID;
            document.head.appendChild(style);
        }

        style.textContent = customCss;
    }

    function setupCssInput(textarea) {
        if (!textarea) return;

        const config = loadConfig();
        textarea.value = config.customCss;

        const style = document.getElementById(CUSTOM_CSS_ID);
        if (!style) return;

        textarea.addEventListener("input", () => {
            style.textContent = textarea.value;
            saveConfig({ customCss: textarea.value });
        });
    }

    function addSettingsTab() {
        const advancedTab = document.querySelector(`.${CSS_CLASSES.tabItem}[aria-controls='advanced-tab']`);
        if (!advancedTab) return;
        if (document.getElementById(BUTTON_ID)) return;

        const settingsBtn = document.createElement("div");
        settingsBtn.id = BUTTON_ID;
        settingsBtn.className = advancedTab.className;
        settingsBtn.role = "tab";
        settingsBtn.tabIndex = -1;
        settingsBtn.ariaSelected = "false";
        settingsBtn.textContent = "RSCord Settings";

        settingsBtn.addEventListener("click", () => {
            const tabs = settingsBtn.parentElement.querySelectorAll('[role="tab"]');
            tabs.forEach(tab => tab.classList.remove(CSS_CLASSES.selected));
            tabs.forEach(tab => tab.setAttribute("aria-selected", "false"));
            settingsBtn.classList.add(CSS_CLASSES.selected);
            settingsBtn.setAttribute("aria-selected", "true");

            let customContent = document.getElementById(CONTENT_CONTAINER_ID);
            if (!customContent) {
                customContent = document.createElement("div");
                customContent.id = CONTENT_CONTAINER_ID;
                customContent.innerHTML = TAB_CONTENT;

                const switchContainer = customContent.querySelector(`#${SWITCH_CONTAINER_ID}`);
                addSwitches(switchContainer);

                document.querySelector(`.${CSS_CLASSES.contentColumn}`).appendChild(customContent);

                const cssInput = document.getElementById(CUSTOM_CSS_INPUT_ID);
                setupCssInput(cssInput);
            }

            const contentColumn = document.querySelector(`.${CSS_CLASSES.contentColumn}`);
            Array.from(contentColumn.children).forEach(child => {
                if (child.id !== CONTENT_CONTAINER_ID) child.style.display = "none";
            });
            customContent.style.display = "block";
        });

        advancedTab.insertAdjacentElement("afterend", settingsBtn);
        return true;
    }

    const observer = new MutationObserver(() => {
        if (document.querySelector(`.${CSS_CLASSES.settingsSidebar}`)) addSettingsTab();
        if (loadConfig().revertStatusIcons) revertStatusIcons();
    });

    observer.observe(document.body, { childList: true, subtree: true });
    applyCustomCss();

    document.body.addEventListener("click", (e) => {
        const clickedHamburger = e.target.closest(`.${CSS_CLASSES.hamburger}`)
        if (clickedHamburger && IS_MOBILE) {
            const settingsRegion = document.querySelector(`.${CSS_CLASSES.settingsRegion}`)
            settingsRegion.classList.remove(CSS_CLASSES.hidden);

            const contentRegion = document.querySelector(`.${CSS_CLASSES.contentRegion}`)
            contentRegion.classList.add(CSS_CLASSES.hidden);
        }

        const clickedTab = e.target.closest('[role="tab"]');
        if (!clickedTab) return;

        const allTabs = document.querySelectorAll('[role="tab"]');
        allTabs.forEach(tab => tab.classList.remove(CSS_CLASSES.selected));
        allTabs.forEach(tab => tab.setAttribute("aria-selected", "false"));
        clickedTab.classList.add(CSS_CLASSES.selected);
        clickedTab.setAttribute("aria-selected", "true");

        const contentColumn = document.querySelector(`.${CSS_CLASSES.contentColumn}`);
        if (!contentColumn) return;

        if (clickedTab.id === BUTTON_ID) {
            Array.from(contentColumn.children).forEach(child => {
                if (child.id === CONTENT_CONTAINER_ID) {
                    child.style.display = "block";
                } else {
                    child.style.display = "none";
                }

                if (IS_MOBILE) {
                    const settingsRegion = document.querySelector(`.${CSS_CLASSES.settingsRegion}`)
                    settingsRegion.classList.add(CSS_CLASSES.hidden);

                    const contentRegion = document.querySelector(`.${CSS_CLASSES.contentRegion}`)
                    contentRegion.classList.remove(CSS_CLASSES.hidden);
                }
            });
        } else {
            Array.from(contentColumn.children).forEach(child => {
                if (child.id !== CONTENT_CONTAINER_ID) child.style.display = "";
                else child.style.display = "none";
            });
        }
    });
})();