const $triliumServerUrl = $("#trilium-server-url");
const $triliumServerPassword = $("#trilium-server-password");

const $errorMessage = $("#error-message");
const $successMessage = $("#success-message");

function showError(message) {
    $errorMessage.html(message).show();
    $successMessage.hide();
}

function showSuccess(message) {
    $successMessage.html(message).show();
    $errorMessage.hide();
}

async function saveTriliumServerSetup(e) {
    e.preventDefault();

    if ($triliumServerUrl.val().trim().length === 0
        || $triliumServerPassword.val().trim().length === 0) {
        showError("One or more mandatory inputs are missing. Please fill in server URL and password.");

        return;
    }

    let resp;

    try {
        resp = await fetch($triliumServerUrl.val() + '/api/login/token', {
            method: "POST",
            headers: {
                'Accept': 'application/json',
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                password: $triliumServerPassword.val()
            })
        });
    }
    catch (e) {
        showError("Unknown error: " + e.message);
        return;
    }

    if (resp.status === 401) {
        showError("Incorrect credentials.");
    }
    else if (resp.status !== 200) {
        showError("Unrecognised response with status code " + resp.status);
    }
    else {
        const json = await resp.json();

        showSuccess("Authentication against Trilium server has been successful.");

        $triliumServerPassword.val('');

        browser.storage.sync.set({
            triliumServerUrl: $triliumServerUrl.val(),
            authToken: json.token
        });

        await restoreOptions();
    }
}

const $triliumServerSetupForm = $("#trilium-server-setup-form");
const $triliumServerConfiguredDiv = $("#trilium-server-configured");
const $triliumServerLink = $("#trilium-server-link");
const $resetTriliumServerSetupLink = $("#reset-trilium-server-setup");

$resetTriliumServerSetupLink.on("click", e => {
    e.preventDefault();

    browser.storage.sync.set({
        triliumServerUrl: '',
        authToken: ''
    });

    restoreOptions();
});

$triliumServerSetupForm.on("submit", saveTriliumServerSetup);

const $triliumDesktopPort = $("#trilium-desktop-port");
const $triilumDesktopSetupForm = $("#trilium-desktop-setup-form");

$triilumDesktopSetupForm.on("submit", e => {
    e.preventDefault();

    const port = $triliumDesktopPort.val().trim();
    const portNum = parseInt(port);

    if (port && (isNaN(portNum) || portNum <= 0 || portNum >= 65536)) {
        showError(`Please enter valid port number.`);
        return;
    }

    browser.storage.sync.set({
        triliumDesktopPort: port
    });

    showSuccess(`Port number has been saved.`);
});

async function restoreOptions() {
    const {triliumServerUrl} = await browser.storage.sync.get("triliumServerUrl");
    const {authToken} = await browser.storage.sync.get("authToken");

    $errorMessage.hide();
    $successMessage.hide();

    $triliumServerUrl.val('');
    $triliumServerPassword.val('');

    if (triliumServerUrl && authToken) {
        $triliumServerSetupForm.hide();
        $triliumServerConfiguredDiv.show();

        $triliumServerLink
            .attr("href", triliumServerUrl)
            .text(triliumServerUrl);
    }
    else {
        $triliumServerSetupForm.show();
        $triliumServerConfiguredDiv.hide();
    }

    const {triliumDesktopPort} = await browser.storage.sync.get("triliumDesktopPort");

    $triliumDesktopPort.val(triliumDesktopPort);
}

$(restoreOptions);