// public/dashboard/js/api.js
// Centralized REST API client for Btekno Retribusi Admin Dashboard

import { API_CONFIG } from './config.js';

// Export API_CONFIG untuk digunakan di file lain
export { API_CONFIG };

const API_BASE_URL = API_CONFIG.BASE_URL;

function getToken() {
  return localStorage.getItem('token') || '';
}

async function apiRequest(path, options = {}) {
  const url = path.startsWith('http') ? path : `${API_BASE_URL}${path}`;

  const headers = {
    'Content-Type': 'application/json',
    // X-API-KEY dari konfigurasi backend (RETRIBUSI_API_KEY)
    'X-API-KEY': API_CONFIG.API_KEY,
    ...(options.headers || {})
  };

  const token = getToken();
  if (token) {
    headers['Authorization'] = `Bearer ${token}`;
  }

  const config = {
    method: options.method || 'GET',
    headers,
    body: options.body ? JSON.stringify(options.body) : null
  };

  try {
    const res = await fetch(url, config);

    if (res.status === 401) {
      // Unauthorized → clear token & redirect to login
      localStorage.removeItem('token');
      localStorage.removeItem('user');
      // Cek apakah sudah di login page untuk menghindari redirect loop
      const currentPath = window.location.pathname;
      const isLoginPage = currentPath.includes('index.php') || currentPath === '/' || currentPath.endsWith('/');
      if (!isLoginPage) {
        window.location.href = '../index.php';
      }
      throw new Error('Unauthorized');
    }

    const text = await res.text();
    let json;
    try {
      json = text ? JSON.parse(text) : {};
    } catch (e) {
      json = { raw: text };
    }

    if (!res.ok) {
      const msg = json.message || json.error || `HTTP ${res.status}`;
      throw new Error(msg);
    }

    // Some endpoints might wrap data as { success, data, ... }
    if (json && Object.prototype.hasOwnProperty.call(json, 'success') &&
        Object.prototype.hasOwnProperty.call(json, 'data')) {
      return json.data;
    }

    return json;
  } catch (err) {
    console.error('API error', { url, error: err });
    throw err;
  }
}

// Helper untuk build query string dari object params
function buildQuery(params = {}) {
  const search = new URLSearchParams();
  Object.entries(params).forEach(([key, value]) => {
    if (value !== undefined && value !== null && value !== '') {
      search.append(key, value);
    }
  });
  const qs = search.toString();
  return qs ? `?${qs}` : '';
}

// Typed helpers

export async function apiLogin(username, password) {
  return apiRequest('/auth/v1/login', {
    method: 'POST',
    body: { username, password }
  });
}

export async function apiGetLocations(params = {}) {
  // Handle pagination: { page, limit }
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/frontend/locations${qs}`);
}

export async function apiGetGates(locationCode, params = {}) {
  // Handle pagination: { page, limit, location_code }
  const queryParams = { ...params };
  if (locationCode) queryParams.location_code = locationCode;
  const qs = buildQuery(queryParams);
  return apiRequest(`/retribusi/v1/frontend/gates${qs}`);
}

export async function apiGetSummary({ date, locationCode, gateCode }) {
  const qs = buildQuery({
    date,
    location_code: locationCode,
    gate_code: gateCode
  });
  return apiRequest(`/retribusi/v1/dashboard/summary${qs}`);
}

export async function apiGetDaily({ startDate, endDate, locationCode }) {
  const qs = buildQuery({
    start_date: startDate,
    end_date: endDate,
    location_code: locationCode
  });
  return apiRequest(`/retribusi/v1/dashboard/daily${qs}`);
}

export async function apiGetByCategory({ date, locationCode, gateCode }) {
  const qs = buildQuery({
    date,
    location_code: locationCode,
    gate_code: gateCode
  });
  return apiRequest(`/retribusi/v1/dashboard/by-category${qs}`);
}

// Ringkasan global harian (daily_summary)
export async function apiGetSummaryDaily(params = {}) {
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/summary/daily${qs}`);
}

// Ringkasan per jam (hourly_summary)
export async function apiGetSummaryHourly(params = {}) {
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/summary/hourly${qs}`);
}

// Snapshot realtime (untuk panel live / TV wall)
export async function apiGetRealtimeSnapshot(params = {}) {
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/realtime/snapshot${qs}`);
}

// Entry events list (raw events dari mesin YOLO)
// GET /retribusi/v1/frontend/entry-events
// Parameters: page, limit, location_code, gate_code, category, start_date, end_date
export async function apiGetEntryEvents(params = {}) {
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/frontend/entry-events${qs}`);
}

// Realtime events list (history untuk SSE)
// GET /retribusi/v1/realtime/events
// Parameters: page, limit, location_code, gate_code, category, start_date, end_date
export async function apiGetRealtimeEvents(params = {}) {
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/realtime/events${qs}`);
}

// Alias untuk backward compatibility
export async function apiGetEvents(params = {}) {
  return apiGetEntryEvents(params);
}

// Catatan: realtime SSE /retribusi/v1/realtime/stream akan diakses langsung via EventSource,
// bukan lewat fetch/apiRequest karena menggunakan Server-Sent Events (SSE).