const TOKEN_KEY = "goldfish_token";

export function getToken() {
  return localStorage.getItem(TOKEN_KEY);
}

export function setToken(token) {
  localStorage.setItem(TOKEN_KEY, token);
}

export function clearToken() {
  localStorage.removeItem(TOKEN_KEY);
}

export function isLoggedIn() {
  return Boolean(getToken());
}

async function request(path, options = {}) {
  const headers = { ...(options.headers || {}) };
  if (options.body && !headers["Content-Type"]) {
    headers["Content-Type"] = "application/json";
  }
  const token = getToken();
  if (token) headers.Authorization = `Bearer ${token}`;

  const resp = await fetch(path, { ...options, headers });
  let data = null;
  const ct = resp.headers.get("content-type") || "";
  if (ct.includes("application/json")) {
    data = await resp.json();
  }
  if (!resp.ok) {
    const detail = data?.detail;
    const msg = typeof detail === "string" ? detail : detail?.msg || resp.statusText;
    throw new Error(msg || "Request failed");
  }
  return data;
}

export const api = {
  login(pin) {
    return request("/api/auth/pin", { method: "POST", body: JSON.stringify({ pin }) });
  },
  listRecaps(limit = 20, offset = 0) {
    return request(`/api/recaps?limit=${limit}&offset=${offset}`);
  },
  getRecap(videoId) {
    return request(`/api/recaps/${encodeURIComponent(videoId)}`);
  },
  createRecap(url, force = false) {
    return request("/api/recaps", { method: "POST", body: JSON.stringify({ url, force }) });
  },
  regenerateRecap(videoId) {
    return request(`/api/recaps/${encodeURIComponent(videoId)}/regenerate`, { method: "POST" });
  },
};

export function formatTimestamp(seconds) {
  const s = Math.max(0, Math.floor(seconds));
  const h = Math.floor(s / 3600);
  const m = Math.floor((s % 3600) / 60);
  const sec = s % 60;
  if (h > 0) return `${h}:${String(m).padStart(2, "0")}:${String(sec).padStart(2, "0")}`;
  return `${m}:${String(sec).padStart(2, "0")}`;
}

export function youtubeUrl(videoId, seconds) {
  const base = `https://www.youtube.com/watch?v=${videoId}`;
  return seconds != null ? `${base}&t=${Math.floor(seconds)}s` : base;
}

export const VERDICT_LABELS = {
  watch: { text: "Lohnt sich", emoji: "🎬", className: "verdict-watch" },
  skim: { text: "Nur Stellen", emoji: "🐟", className: "verdict-skim" },
  skip: { text: "Skip it", emoji: "💤", className: "verdict-skip" },
};