const API_BASE = process.env.NEXT_PUBLIC_API_URL || 'http://45.93.137.91/api';

async function apiFetch(endpoint, options = {}) {
  const token = typeof window !== 'undefined' ? localStorage.getItem('token') : null;

  const headers = {
    'Content-Type': 'application/json',
    ...(token && { Authorization: `Bearer ${token}` }),
    ...options.headers,
  };

  const res = await fetch(`${API_BASE}${endpoint}`, {
    ...options,
    headers,
  });

  if (!res.ok) {
    const text = await res.text().catch(() => '');
    throw new Error(`API ${res.status}: ${text || res.statusText}`);
  }

  // Some endpoints return empty body
  const text = await res.text();
  return text ? JSON.parse(text) : null;
}

// ─── Rent Properties ───

export async function getRentProperties() {
  return apiFetch('/RentProperties');
}

export async function getRentProperty(id) {
  return apiFetch(`/RentProperties/${id}`);
}

export async function getRentPropertyLocations(params = {}) {
  const qs = new URLSearchParams();
  if (params.maxOffset != null) qs.set('maxOffset', params.maxOffset);
  if (params.minOffset != null) qs.set('minOffset', params.minOffset);
  const query = qs.toString();
  return apiFetch(`/RentProperties/locations${query ? `?${query}` : ''}`);
}

// ─── Sale Properties ───

export async function getSaleProperties() {
  return apiFetch('/SaleProperties');
}

export async function getSaleProperty(id) {
  return apiFetch(`/SaleProperties/${id}`);
}

export async function getSalePropertiesPaginated(page = 1, pageSize = 10) {
  return apiFetch(`/SaleProperties/paginated?pageNumber=${page}&pageSize=${pageSize}`);
}

// ─── Properties (generic) ───

export async function getProperty(id) {
  return apiFetch(`/Properties/Get/${id}`);
}

// ─── Recommendations ───

export async function getRecommendations() {
  return apiFetch('/Recommendations');
}

export async function getTopRecommendations(count = 10) {
  return apiFetch(`/Recommendations/top/${count}`);
}

// ─── Reservations ───

export async function getReservations() {
  return apiFetch('/Reservations');
}

export async function getReservation(id) {
  return apiFetch(`/Reservations/${id}`);
}

export async function checkAvailability(propertyId, fromDate = null, toDate = null) {
  const qs = new URLSearchParams();
  if (fromDate) qs.set('fromDate', fromDate);
  if (toDate) qs.set('toDate', toDate);
  const query = qs.toString();
  return apiFetch(`/Reservations/available/${propertyId}${query ? `?${query}` : ''}`);
}

export async function bookReservation(data) {
  return apiFetch('/Reservations/book', {
    method: 'POST',
    body: JSON.stringify(data),
  });
}

// ─── Terms ───

export async function getTerms() {
  return apiFetch('/Terms');
}