/**
 * Queue-Times.com live ride status scraper.
 *
 * API: https://queue-times.com/parks/{id}/queue_times.json
 * Updates every 5 minutes while the park is operating.
 * Attribution required per their terms: "Powered by Queue-Times.com"
 * See: https://queue-times.com/en-US/pages/api
 */

import { isCoasterMatch } from "../coaster-match";

const BASE = "https://queue-times.com/parks";

const HEADERS = {
  "User-Agent":
    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 " +
    "(KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36",
  Accept: "application/json",
};

export interface LiveRide {
  name: string;
  isOpen: boolean;
  waitMinutes: number;
  lastUpdated: string; // ISO 8601
  /** True when the ride name appears in the RCDB coaster list for this park. */
  isCoaster: boolean;
}

export interface LiveRidesResult {
  rides: LiveRide[];
  /** ISO timestamp of when we fetched the data */
  fetchedAt: string;
}

interface QTRide {
  id: number;
  name: string;
  is_open: boolean;
  wait_time: number;
  last_updated: string;
}

interface QTLand {
  id: number;
  name: string;
  rides: QTRide[];
}

interface QTResponse {
  lands: QTLand[];
  rides: QTRide[]; // top-level rides (usually empty, rides live in lands)
}

/**
 * Fetch live ride open/closed status and wait times for a park.
 *
 * Returns null when:
 * - The park has no Queue-Times mapping
 * - The request fails
 * - The response contains no rides
 *
 * Pass coasterNames (from RCDB static data) to classify rides accurately.
 * Matching is case-insensitive. When coasterNames is null no ride is
 * classified as a coaster and the "Coasters only" toggle is hidden.
 *
 * Pass revalidate (seconds) to control Next.js ISR cache lifetime.
 * Defaults to 300s (5 min) to match Queue-Times update frequency.
 */
export async function fetchLiveRides(
  queueTimesId: number,
  coasterNames: Set<string> | null = null,
  revalidate = 300,
): Promise<LiveRidesResult | null> {
  const url = `${BASE}/${queueTimesId}/queue_times.json`;
  try {
    const res = await fetch(url, {
      headers: HEADERS,
      next: { revalidate },
      signal: AbortSignal.timeout(10_000),
    } as RequestInit & { next: { revalidate: number } });

    if (!res.ok) return null;

    const json = (await res.json()) as QTResponse;

    const rides: LiveRide[] = [];

    for (const land of json.lands ?? []) {
      for (const r of land.rides ?? []) {
        if (!r.name) continue;
        rides.push({
          name: r.name,
          isOpen: r.is_open,
          waitMinutes: r.wait_time ?? 0,
          lastUpdated: r.last_updated,
          isCoaster: coasterNames ? isCoasterMatch(r.name, coasterNames) : false,
        });
      }
    }

    // Also capture any top-level rides (rare but possible)
    for (const r of json.rides ?? []) {
      if (!r.name) continue;
      rides.push({
        name: r.name,
        isOpen: r.is_open,
        waitMinutes: r.wait_time ?? 0,
        lastUpdated: r.last_updated,
        isCoaster: coasterNames ? isCoasterMatch(r.name, coasterNames) : false,
      });
    }

    if (rides.length === 0) return null;

    // Open rides first, then alphabetical within each group
    rides.sort((a, b) => {
      if (a.isOpen !== b.isOpen) return a.isOpen ? -1 : 1;
      return a.name.localeCompare(b.name);
    });

    return { rides, fetchedAt: new Date().toISOString() };
  } catch {
    return null;
  }
}