const BASE_URL = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:3001';

async function apiFetch<T>(path: string, options?: RequestInit): Promise<T> {
  const res = await fetch(`${BASE_URL}${path}`, {
    ...options,
    headers: {
      'Content-Type': 'application/json',
      ...(options?.headers ?? {}),
    },
    next: { revalidate: 30 },
  });
  if (!res.ok) throw new Error(`API error ${res.status}: ${path}`);
  return res.json() as Promise<T>;
}

export interface Stat {
  owlCount: number;
  burrowCount: number;
  volunteerHours: number;
  activeStreams: number;
}

export interface Stream {
  id: string;
  name: string;
  location: string;
  status: 'live' | 'offline';
  viewerCount: number;
  thumbnailUrl?: string;
  hlsUrl?: string;
  description?: string;
}

export interface Wildlife {
  id: string;
  name: string;
  scientificName: string;
  status: string;
  description: string;
  habitat: string;
  imageUrl?: string;
}

export interface Campaign {
  id: string;
  title: string;
  description: string;
  goal: number;
  raised: number;
  imageUrl?: string;
}

export interface Event {
  id: string;
  title: string;
  date: string;
  location: string;
  description: string;
  rsvpCount: number;
  capacity?: number;
}

export interface Sighting {
  id: string;
  species: string;
  gps_lat: number;
  gps_lng: number;
  photo_url?: string;
  description: string;
  verified: boolean;
  created_at: string;
  reporter?: { id: string; name: string };
}

export interface Burrow {
  id: string;
  lat: number;
  lng: number;
  name?: string;
  active: boolean;
}

export const api = {
  getStats: () => apiFetch<Stat>('/api/stats'),
  getStreams: () => apiFetch<Stream[]>('/api/streams'),
  getStream: (id: string) => apiFetch<Stream>(`/api/streams/${id}`),
  getWildlife: () => apiFetch<Wildlife[]>('/api/wildlife'),
  getCampaigns: () => apiFetch<Campaign[]>('/api/campaigns'),
  getEvents: () => apiFetch<Event[]>('/api/events'),
  rsvpEvent: (id: string, email: string) =>
    apiFetch(`/api/events/${id}/rsvp`, {
      method: 'POST',
      body: JSON.stringify({ email }),
    }),
  getBurrows: () => apiFetch<Burrow[]>('/api/burrows'),
  getSightings: () => apiFetch<Sighting[]>('/api/sightings'),
};