import { API_HOST } from '@/lib/constant';
import { getOrCreateDeviceId } from '@/lib/device';
import { getSid } from '@/lib/auth';

// Fetch request wrapper
export async function request<T = unknown>(url: string, options: RequestInit = {}): Promise<T> {
  // Get or generate Device ID (already encrypted 40-char format)
  let deviceId = '';
  let sid: string | null = null;
  if (typeof window !== 'undefined') {
    deviceId = await getOrCreateDeviceId();
    sid = getSid();
  }

  const config: RequestInit = {
    ...options,
    headers: {
      'Content-Type': 'application/json',
      'os-type': '3',
      ...(deviceId && { 'Device-Id': deviceId }),
      ...(sid && { 'Authorization': `Bearer ${sid}` }),
      ...options.headers,
    },
  };

  const response = await fetch(`${API_HOST}${url}`, config);

  let data: T;
  const contentType = response.headers.get('content-type');
  if (contentType?.includes('application/json')) {
    data = await response.json();
  } else {
    const text = await response.text();
    data = { message: text || response.statusText } as T;
  }

  if (!response.ok) {
    console.error('API Error:', {
      status: response.status,
      url,
      data,
    });
    throw new Error(
      (data as { errMsg?: string; message?: string })?.errMsg ||
      (data as { message?: string })?.message ||
      `Request failed with status ${response.status}`
    );
  }

  return data;
}

// GET request
export function get<T = unknown>(url: string, params?: Record<string, string | number | boolean>) {
  const filteredParams = params
    ? Object.fromEntries(
        Object.entries(params).filter(([, v]) => v !== undefined && v !== null)
      )
    : undefined;
  const queryString =
    filteredParams && Object.keys(filteredParams).length > 0
      ? `?${new URLSearchParams(filteredParams as Record<string, string>).toString()}`
      : '';
  return request<T>(url + queryString, { method: 'GET' });
}

// POST request
export function post<T = unknown>(url: string, data?: unknown) {
  return request<T>(url, {
    method: 'POST',
    body: JSON.stringify(data),
  });
}