// theme preference
function media_theme_pref() {
    document.documentElement.removeAttribute("class");

    if (
        window.matchMedia("(prefers-color-scheme: dark)").matches &&
        (!window.localStorage.getItem("attobin:theme") ||
            window.localStorage.getItem("attobin:theme") === "Auto")
    ) {
        document.documentElement.classList.add("dark");

        document.getElementById("switch_light").classList.add("hidden");
        document.getElementById("switch_dark").classList.remove("hidden");
    } else if (
        window.matchMedia("(prefers-color-scheme: light)").matches &&
        (!window.localStorage.getItem("attobin:theme") ||
            window.localStorage.getItem("attobin:theme") === "Auto")
    ) {
        document.documentElement.classList.remove("dark");

        document.getElementById("switch_light").classList.remove("hidden");
        document.getElementById("switch_dark").classList.add("hidden");
    } else if (window.localStorage.getItem("attobin:theme")) {
        /* restore theme */
        const current = window.localStorage.getItem("attobin:theme");
        document.documentElement.className = current.toLowerCase();

        if (current === "Light") {
            document.getElementById("switch_light").classList.remove("hidden");
            document.getElementById("switch_dark").classList.add("hidden");
        } else {
            document.getElementById("switch_light").classList.add("hidden");
            document.getElementById("switch_dark").classList.remove("hidden");
        }
    }
}

globalThis.temporary_set_theme = (theme) => {
    document.documentElement.className = theme.toLowerCase();

    if (theme === "Light") {
        document.getElementById("switch_light").classList.remove("hidden");
        document.getElementById("switch_dark").classList.add("hidden");
    } else {
        document.getElementById("switch_light").classList.add("hidden");
        document.getElementById("switch_dark").classList.remove("hidden");
    }
};

globalThis.set_theme = (theme) => {
    window.localStorage.setItem("attobin:theme", theme);
    document.documentElement.className = theme;
    media_theme_pref();
};

media_theme_pref();

// messages
function get_cookie(key) {
    return (document.cookie.split(`${key}=`)[1] || "").split(";")[0];
}

function check_message() {
    const element = document.getElementById("messages");

    const message = get_cookie("Atto-Message");
    const message_good = get_cookie("Atto-Message-Good") === "true";

    if (message) {
        element.style.marginBottom = "1rem";
        element.style.paddingLeft = "1rem";
        element.innerHTML += `<li class="${message_good ? "green" : "red"}">${message.replaceAll('"', "")}</li>`;
    }

    // clear cookies
    for (cookie of document.cookie.split(";")) {
        // biome-ignore lint/suspicious/noDocumentCookie: cookie store is barely supported
        document.cookie = `${cookie.split("=")[0]}=; expires=${new Date(0).toUTCString()}; path=/`;
    }
}

globalThis.show_message = (message, message_good = true) => {
    const element = document.getElementById("messages");
    element.style.marginBottom = "1rem";
    element.style.paddingLeft = "1rem";
    element.innerHTML += `<li class="${message_good ? "green" : "red"}">${message.replaceAll('"', "")}</li>`;
};

check_message();

// editor
globalThis.init_editor = (
    name = "editor",
    mode = "markdown",
    element = "editor_tab",
    content_element = "editor_content",
) => {
    globalThis[name] = CodeMirror(document.getElementById(element), {
        value: (document.getElementById(content_element) || { innerHTML: "" })
            .innerHTML,
        mode,
        lineWrapping: true,
        lineNumbers: false,
        autoCloseBrackets: true,
        autofocus: true,
        viewportMargin: Number.POSITIVE_INFINITY,
        inputStyle: "contenteditable",
        highlightFormatting: false,
        fencedCodeBlockHighlighting: false,
        xml: false,
        smartIndent: false,
        indentUnit: 4,
        tabSize: 4,
        indentWithTabs: false,
        placeholder: "",
        extraKeys: {
            Home: "goLineLeft",
            End: "goLineRight",
            Enter: (cm) => {
                cm.replaceSelection("\n");
            },
            Tab: "insertSoftTab",
        },
    });

    if (name === "editor") {
        window.addEventListener("beforeunload", (e) => {
            if (!globalThis.ALLOW_LEAVE) {
                e.preventDefault();
                return null;
            }
        });
    }
};

globalThis.tab_editor = () => {
    document.getElementById("editor_tab").classList.remove("hidden");
    document.getElementById("preview_tab").classList.add("hidden");
    document.getElementById("metadata_tab").classList.add("hidden");

    document.getElementById("editor_tab_button").classList.remove("camo");
    document.getElementById("preview_tab_button").classList.add("camo");
    document.getElementById("metadata_tab_button").classList.add("camo");
};

globalThis.tab_preview = async () => {
    // render
    const res = await (
        await fetch("/api/v1/render", {
            method: "POST",
            headers: { "Content-Type": "application/json" },
            body: JSON.stringify({
                content: globalThis.editor.getValue(),
            }),
        })
    ).text();

    document.getElementById("preview_tab").innerHTML = res;
    hljs.highlightAll();

    // ...
    document.getElementById("editor_tab").classList.add("hidden");
    document.getElementById("preview_tab").classList.remove("hidden");
    document.getElementById("metadata_tab").classList.add("hidden");

    document.getElementById("editor_tab_button").classList.add("camo");
    document.getElementById("preview_tab_button").classList.remove("camo");
    document.getElementById("metadata_tab_button").classList.add("camo");
};

globalThis.first_time_on_metadata_tab = true;
globalThis.tab_metadata = () => {
    document.getElementById("editor_tab").classList.add("hidden");
    document.getElementById("preview_tab").classList.add("hidden");
    document.getElementById("metadata_tab").classList.remove("hidden");

    document.getElementById("editor_tab_button").classList.add("camo");
    document.getElementById("preview_tab_button").classList.add("camo");
    document.getElementById("metadata_tab_button").classList.remove("camo");

    if (globalThis.first_time_on_metadata_tab) {
        globalThis.metadata_editor.refresh();
    }

    globalThis.first_time_on_metadata_tab = false;
};

let exists_timeout = null;
globalThis.check_exists_input = (e) => {
    if (exists_timeout) {
        clearTimeout(exists_timeout);
    }

    exists_timeout = setTimeout(async () => {
        if (e.target.value.length < 2 || e.target.value.length > 32) {
            e.target.setCustomValidity("");
            e.target.removeAttribute("data-invalid");
            e.target.reportValidity();
            return;
        }

        const exists = (
            await (await fetch(`/api/v1/entries/${e.target.value}`)).json()
        ).payload;

        console.log(exists);
        if (exists) {
            e.target.setCustomValidity("Slug is already in use");
            e.target.setAttribute("data-invalid", "true");
        } else {
            e.target.setCustomValidity("");
            e.target.removeAttribute("data-invalid");
        }

        e.target.reportValidity();
    }, 1000);
};