// ── State ────────────────────────────────────────────────────────────────────
let emoji = "💬";
let settings = { username: "", apiKey: "", theme: "auto", mastodonPost: false };

// ── DOM ──────────────────────────────────────────────────────────────────────
const $ = (id) => document.getElementById(id);
const emojiDisplay = $("emoji-display");
const emojiShow = $("emoji-show");
const emojiInput = $("emoji-input");
const emojiSection = emojiDisplay.closest(".emoji-section");
const emojiHint = $("emoji-hint");
const statusText = $("status-text");
const statusUrl = $("status-url");
const charCount = $("char-count");
const postBtn = $("post-btn");
const toast = $("toast");
const settingsBtn = $("settings-btn");
const overlay = $("overlay");
const modalClose = $("modal-close");
const sUsername = $("s-username");
const sApikey = $("s-apikey");
const eyeBtn = $("eye-btn");
const saveBtn = $("save-btn");
const themeToggle = $("theme-toggle");
const mastodonToggle = $("mastodon-toggle");

// ── Settings ─────────────────────────────────────────────────────────────────
function applyTheme(theme) {
  if (theme === "auto") {
    delete document.documentElement.dataset.theme;
  } else {
    document.documentElement.dataset.theme = theme;
  }
}

function updateThemeToggle(theme) {
  themeToggle.querySelectorAll(".theme-btn").forEach((btn) => {
    const active = btn.dataset.theme === theme;
    btn.classList.toggle("active", active);
    btn.setAttribute("aria-pressed", active ? "true" : "false");
  });
}

function loadSettings() {
  try {
    const raw = localStorage.getItem("spo-settings");
    if (raw) settings = { ...settings, ...JSON.parse(raw) };
  } catch {}
  applyTheme(settings.theme);
  updateBadge();
  mastodonToggle.checked = settings.mastodonPost ?? false;
}

function saveSettings() {
  settings.username = sUsername.value.trim().replace(/^@/, "");
  settings.apiKey = sApikey.value.trim();
  try {
    localStorage.setItem("spo-settings", JSON.stringify(settings));
  } catch {
    showToast("Could not save — storage unavailable", "error");
    return;
  }
  updateBadge();
  closeModal();
  showToast("Settings saved", "success");
}

function updateBadge() {
  settingsBtn.classList.toggle(
    "needs-setup",
    !settings.username || !settings.apiKey,
  );
}

// ── Modal ────────────────────────────────────────────────────────────────────
function openModal() {
  sUsername.value = settings.username;
  sApikey.value = settings.apiKey;
  updateThemeToggle(settings.theme);
  overlay.classList.add("open");
  document.body.style.overflow = "hidden";
  // Focus first empty field
  if (!settings.username) sUsername.focus();
  else if (!settings.apiKey) sApikey.focus();
}

function closeModal() {
  overlay.classList.remove("open");
  document.body.style.overflow = "";
}

const privacyOverlay = $("privacy-overlay");

function openPrivacy() {
  privacyOverlay.classList.add("open");
  document.body.style.overflow = "hidden";
}

function closePrivacy() {
  privacyOverlay.classList.remove("open");
  document.body.style.overflow = "";
}

settingsBtn.addEventListener("click", openModal);
$("privacy-link").addEventListener("click", openPrivacy);
$("privacy-modal-close").addEventListener("click", closePrivacy);
privacyOverlay.addEventListener("click", (e) => {
  if (e.target === privacyOverlay) closePrivacy();
});
modalClose.addEventListener("click", closeModal);
overlay.addEventListener("click", (e) => {
  if (e.target === overlay) closeModal();
});
saveBtn.addEventListener("click", saveSettings);

mastodonToggle.addEventListener("change", () => {
  settings.mastodonPost = mastodonToggle.checked;
  try { localStorage.setItem("spo-settings", JSON.stringify(settings)); } catch {}
});

themeToggle.addEventListener("click", (e) => {
  const btn = e.target.closest(".theme-btn");
  if (!btn) return;
  settings.theme = btn.dataset.theme;
  applyTheme(settings.theme);
  updateThemeToggle(settings.theme);
});

// Eye toggle for API key
eyeBtn.addEventListener("click", () => {
  const show = sApikey.type === "password";
  sApikey.type = show ? "text" : "password";
  eyeBtn.textContent = show ? "🙈" : "👁";
  eyeBtn.setAttribute("aria-label", show ? "Hide API key" : "Show API key");
});

// ── Emoji picker ─────────────────────────────────────────────────────────────
function extractFirstEmoji(str) {
  if (!str) return null;
  if (typeof Intl?.Segmenter === "function") {
    const seg = new Intl.Segmenter(undefined, { granularity: "grapheme" });
    for (const { segment } of seg.segment(str)) {
      if (/\p{Emoji}/u.test(segment) && segment.trim() !== "") return segment;
    }
    return null;
  }
  const m = str.match(/\p{Emoji_Presentation}[\p{Emoji}\u{FE0F}\u{20E3}]*/u);
  return m ? m[0] : null;
}

// Detect platform for hint text
const isMac =
  /Mac/.test(navigator.userAgent) && !/iPhone|iPad/.test(navigator.userAgent);
const osHint = isMac
  ? " · or ⌃⌘Space"
  : navigator.userAgent.includes("Win")
    ? " · or Win+."
    : "";

function openEmojiPicker() {
  emojiSection.classList.add("picking");
  emojiInput.value = "";
  emojiInput.focus();
  emojiHint.textContent = `Type, paste, or use your emoji keyboard${osHint}`;
}

function closeEmojiPicker() {
  emojiSection.classList.remove("picking");
  emojiHint.textContent = "Click to change emoji";
}

emojiDisplay.addEventListener("click", openEmojiPicker);

emojiDisplay.addEventListener("keydown", (e) => {
  if (e.key === "Enter" || e.key === " ") {
    e.preventDefault();
    openEmojiPicker();
  }
});

emojiInput.addEventListener("input", () => {
  const found = extractFirstEmoji(emojiInput.value);
  if (found) {
    emoji = found;
    emojiShow.textContent = found;
    closeEmojiPicker();
  }
});

emojiInput.addEventListener("blur", () => {
  // Small delay so a click on the emoji-display doesn't flicker
  setTimeout(() => {
    if (document.activeElement !== emojiInput) closeEmojiPicker();
  }, 150);
});

// ── Keyboard shortcuts ────────────────────────────────────────────────────────
document.addEventListener("keydown", (e) => {
  if (e.key === "Escape") {
    if (emojiSection.classList.contains("picking")) closeEmojiPicker();
    else if (overlay.classList.contains("open")) closeModal();
    else if (privacyOverlay.classList.contains("open")) closePrivacy();
  }
});

// ── Character count ───────────────────────────────────────────────────────────
statusText.addEventListener("input", () => {
  const n = statusText.value.length;
  charCount.textContent = `${n} / 5000`;
  charCount.classList.toggle("warn", n > 4800);
});

// ── Post status ───────────────────────────────────────────────────────────────
async function postStatus() {
  if (!settings.username || !settings.apiKey) {
    showToast("Add your credentials in settings first", "error");
    openModal();
    return;
  }

  const content = statusText.value.trim();
  if (!content) {
    showToast("Status text is required", "error");
    statusText.focus();
    return;
  }

  postBtn.classList.add("loading");
  postBtn.disabled = true;

  const body = { emoji, content };
  const url = statusUrl.value.trim();
  if (url) body.external_url = url;
  if (!mastodonToggle.checked) body.skip_mastodon_post = true;

  try {
    const res = await fetch(
      `https://api.omg.lol/address/${encodeURIComponent(settings.username)}/statuses/`,
      {
        method: "POST",
        headers: {
          Authorization: `Bearer ${settings.apiKey}`,
          "Content-Type": "application/json",
        },
        body: JSON.stringify(body),
      },
    );

    const data = await res.json().catch(() => ({}));

    if (res.ok || data?.request?.status_code === 200) {
      const statusLink = data?.response?.url ?? null;
      const msg = statusLink ? "Status posted · View ↗" : "Status posted";
      showToast(msg, "success", statusLink);
      statusText.value = "";
      statusUrl.value = "";
      charCount.textContent = "0 / 5000";
      charCount.classList.remove("warn");
      emoji = "📝";
      emojiShow.textContent = "📝";
    } else {
      const msg = data?.response?.message ?? `Error ${res.status}`;
      showToast(msg, "error");
    }
  } catch (err) {
    const msg =
      err?.message === "Failed to fetch"
        ? "Network error — check your connection"
        : (err?.message ?? "Something went wrong");
    showToast(msg, "error");
  } finally {
    postBtn.classList.remove("loading");
    postBtn.disabled = false;
  }
}

postBtn.addEventListener("click", postStatus);

// Ctrl/Cmd + Enter to post from textarea
statusText.addEventListener("keydown", (e) => {
  if (e.key === "Enter" && (e.ctrlKey || e.metaKey)) postStatus();
});

// ── Toast ────────────────────────────────────────────────────────────────────
let toastTimer;
function showToast(msg, type = "", url = null) {
  clearTimeout(toastTimer);
  toast.textContent = msg;
  toast.onclick = url ? () => window.open(url, "_blank", "noopener") : null;
  toast.className = `show ${type}${url ? " clickable" : ""}`.trim();
  toastTimer = setTimeout(() => {
    toast.className = "";
    toast.onclick = null;
  }, 4000);
}

// ── Service worker ────────────────────────────────────────────────────────────
if ("serviceWorker" in navigator) {
  navigator.serviceWorker.register("sw.js").catch(() => {});
}

// ── Init ──────────────────────────────────────────────────────────────────────
loadSettings();

// Auto-open settings if no credentials saved yet
if (!settings.username || !settings.apiKey) {
  setTimeout(openModal, 500);
}