const _BODY_PREVIEW_MAX = 280;

function _looksLikeHtmlDocument(body) {
  const s = String(body || "").trimStart();
  if (!s) return false;
  if (s.startsWith("<!DOCTYPE") || s.startsWith("<!doctype")) return true;
  if (s.length >= 5 && /^<\s*html[\s>]/i.test(s.slice(0, 32))) return true;
  return s.startsWith("<html");
}

function _clipMessage(msg) {
  const t = String(msg || "").trim();
  if (!t) return "";
  return t.length > _BODY_PREVIEW_MAX ? `${t.slice(0, _BODY_PREVIEW_MAX)}…` : t;
}

function _messageForFailedRequest(status, rawText, parsedPayload) {
  const raw = String(rawText || "").trim();
  if (_looksLikeHtmlDocument(raw)) {
    return `Server error (${status}) — the response was a web page, not JSON. Try again in a moment.`;
  }
  if (parsedPayload && typeof parsedPayload.detail === "string" && parsedPayload.detail.trim()) {
    return _clipMessage(parsedPayload.detail);
  }
  if (parsedPayload && parsedPayload.detail != null) {
    try {
      return _clipMessage(JSON.stringify(parsedPayload.detail));
    } catch {
      return `Request failed (${status})`;
    }
  }
  return _clipMessage(raw) || `Request failed (${status})`;
}

export async function api(path, options = {}) {
  const response = await fetch(path, options);
  const text = await response.text();
  let payload;
  try {
    payload = text ? JSON.parse(text) : {};
  } catch {
    if (!response.ok) {
      const message = _messageForFailedRequest(response.status, text, null);
      const error = new Error(message);
      error.status = response.status;
      error.payload = null;
      throw error;
    }
    return {};
  }
  if (!response.ok) {
    const message = _messageForFailedRequest(response.status, text, payload);
    const error = new Error(message);
    error.status = response.status;
    error.payload = payload;
    throw error;
  }
  return payload;
}

export function authHeaders(token) {
  return token ? { "x-private-token": token } : {};
}

export function uiReactionFor(rating) {
  if (rating === "love") return "love";
  if (rating === "like") return "like";
  if (rating === "curious") return "maybe";
  if (rating === "not_interested") return "not_interested";
  if (rating === "hard_no" || rating === "no") return "no_go";
  return "";
}

export function currentDirectionsFor(plays, kinkId) {
  return plays?.[kinkId]?.directions || [];
}

export { directionColumnsForPlay, directionsAfterColumnDrop } from "./direction-logic.js";