import type { WatchedItem, Settings } from '../types';

const BASE = '/api';

async function req<T>(path: string, options?: RequestInit): Promise<T> {
  const res = await fetch(`${BASE}${path}`, options);
  if (!res.ok) {
    const body = await res.json().catch(() => ({})) as { error?: string };
    throw new Error(body.error || `Request failed: ${res.status}`);
  }
  if (res.status === 204) return undefined as T;
  return res.json() as Promise<T>;
}

export const getItems = () => req<WatchedItem[]>('/items');

export const addItem = (url: string, check_interval: number) =>
  req<WatchedItem>('/items', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ url, check_interval }),
  });

export const updateItem = (id: number, data: { check_interval?: number; is_active?: number }) =>
  req<WatchedItem>(`/items/${id}`, {
    method: 'PUT',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(data),
  });

export const deleteItem = (id: number) => req<void>(`/items/${id}`, { method: 'DELETE' });

export const pauseItem  = (id: number) => req<WatchedItem>(`/items/${id}/pause`,  { method: 'POST' });
export const resumeItem = (id: number) => req<WatchedItem>(`/items/${id}/resume`, { method: 'POST' });
export const resetItem  = (id: number) => req<WatchedItem>(`/items/${id}/reset`,  { method: 'POST' });

export const getSettings = () => req<Settings>('/settings');

export const updateSettings = (data: Partial<Settings>) =>
  req<Settings>('/settings', {
    method: 'PUT',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(data),
  });

export const testTelegram = () =>
  req<{ success: boolean; error?: string }>('/settings/test-telegram', { method: 'POST' });