const form = document.getElementById("quote-form");
const userSelect = document.getElementById("user-select");
const quoteText = document.getElementById("quote-text");
const attachmentInput = document.getElementById("attachment");
const submitButton = document.getElementById("submit-btn");
const statusEl = document.getElementById("status");
const authText = document.getElementById("auth-text");
const loginLink = document.getElementById("login-link");
const logoutButton = document.getElementById("logout-btn");

function setFormLocked(locked) {
  form.classList.toggle("locked", locked);
  userSelect.disabled = locked;
  quoteText.disabled = locked;
  attachmentInput.disabled = locked;
  submitButton.disabled = locked;
}

function setStatus(message, type = "") {
  statusEl.textContent = message;
  statusEl.className = `status ${type}`.trim();
}

async function loadUsers() {
  const response = await fetch("/api/users");
  const payload = await response.json();

  userSelect.innerHTML = "";
  const placeholder = document.createElement("option");
  placeholder.value = "";
  placeholder.textContent = "Select a speaker";
  userSelect.appendChild(placeholder);

  for (const user of payload.users) {
    const option = document.createElement("option");
    option.value = user.id;
    option.textContent = user.displayName;
    userSelect.appendChild(option);
  }
}

async function loadSession() {
  const response = await fetch("/api/session");
  const payload = await response.json();

  if (!payload.authenticated) {
    authText.textContent = "Please log in with Discord to submit quotes.";
    loginLink.hidden = false;
    logoutButton.hidden = true;
    setFormLocked(true);
    return;
  }

  const userName = payload.user.globalName || payload.user.username;
  logoutButton.hidden = false;
  loginLink.hidden = true;

  if (!payload.authorized) {
    authText.textContent = `Logged in as ${userName}, but this account is not allowed to submit.`;
    setFormLocked(true);
    return;
  }

  authText.textContent = `Logged in as ${userName}. You can submit quotes.`;
  setFormLocked(false);
}

logoutButton.addEventListener("click", async () => {
  await fetch("/auth/logout", { method: "POST" });
  window.location.reload();
});

form.addEventListener("submit", async (event) => {
  event.preventDefault();
  const userId = userSelect.value;
  const quote = quoteText.value.trim();
  const file = attachmentInput.files && attachmentInput.files[0] ? attachmentInput.files[0] : null;

  if (!userId || !quote) {
    setStatus("Please choose a speaker and enter a quote.", "error");
    return;
  }

  submitButton.disabled = true;
  setStatus("Sending quote...");

  try {
    const formData = new FormData();
    formData.append("userId", userId);
    formData.append("quoteText", quote);
    if (file) {
      formData.append("attachment", file);
    }

    const response = await fetch("/api/quotes", {
      method: "POST",
      body: formData,
    });

    const payload = await response.json();
    if (!response.ok) {
      throw new Error(payload.error || "Failed to send quote.");
    }

    quoteText.value = "";
    attachmentInput.value = "";
    setStatus("Quote sent to Discord.", "ok");
  } catch (error) {
    setStatus(error.message || "Something went wrong.", "error");
  } finally {
    submitButton.disabled = false;
  }
});

setFormLocked(true);

Promise.all([loadSession(), loadUsers()]).catch((error) => {
  console.error(error);
  setStatus("Failed to initialize page.", "error");
});