/* global importScripts */
/* global idbKeyval */
/* global workbox */
/* global cfgenv */

const VITE_APP_VERSION = '1.2.87';

// Costanti di configurazione
const DYNAMIC_CACHE = 'dynamic-cache-v2';
const baseUrl = self.location.origin;

const CACHE_VERSION = VITE_APP_VERSION;
const CACHE_PREFIX = self.location.hostname || 'app';

function extractDomain(url) {
  return url.replace(/^https?:\/\//, '');
}

function removeTestPrefix(str) {
  return str.startsWith('test.') ? str.slice(5) : str;
}

// Funzione per determinare il dominio API
function determineApiDomain(appDomain) {
  if (ISTEST) {
    return 'testapi.' + removeTestPrefix(appDomain);
  }
  return appDomain.includes('localhost') ? 'localhost:3000' : 'api.' + appDomain;
}

const APP_DOMAIN = extractDomain(baseUrl);
const API_DOMAIN = determineApiDomain(APP_DOMAIN);

console.log('API_DOMAIN', API_DOMAIN);

const CACHE_NAME = 'pwa-cache-' + VITE_APP_VERSION; // Nome della cache

importScripts('workbox/workbox-sw.js');

import { clientsClaim } from 'workbox-core';
import {
  precacheAndRoute,
  cleanupOutdatedCaches,
  createHandlerBoundToURL,
} from 'workbox-precaching';
import { registerRoute, NavigationRoute } from 'workbox-routing';
import { setCacheNameDetails } from 'workbox-core';
import {
  NetworkOnly,
  NetworkFirst,
  StaleWhileRevalidate,
  CacheFirst,
} from 'workbox-strategies';

import { CacheableResponsePlugin } from 'workbox-cacheable-response';
import { ExpirationPlugin } from 'workbox-expiration';

const debug = false; //process.env.NODE_ENV !== 'production';

if (workbox) {
  // Imposta configurazione prima di tutto
  workbox.setConfig({ debug });

  workbox.loadModule('workbox-strategies');

  console.log('Workbox ESISTE ✅ ');
} else {
  console.error('Workbox NON CARICATO ! ❌');
}

setCacheNameDetails({
  prefix: self.location.hostname,
  suffix: 'v2',
  precache: 'precache',
  runtime: 'runtime',
});

// ✅ SOLUZIONE: Sii più specifico
const precacheList = (self.__WB_MANIFEST || []).filter((entry) => {
  const url = entry.url;
  // Escludi file grandi, upload, e risorse dinamiche
  return (
    !url.includes('/upload/') &&
    !url.includes('/assets/videos/') &&
    !url.match(/\.(mp4|webm|zip|pdf)$/)
  );
});

// Precache solo i file filtrati
precacheAndRoute(precacheList);

cleanupOutdatedCaches();

// Installazione del Service Worker
self.addEventListener('install', () => {
  console.log('[Service Worker] Installing ...');
  self.skipWaiting();

  clientsClaim();
  // Notifica il frontend che c'è un nuovo SW pronto
  self.clients.matchAll().then((clients) => {
    clients.forEach((client) => {
      client.postMessage({ type: 'SW_UPDATED' });
    });
  });
});

// Attivazione del Service Worker
self.addEventListener('activate', (event) => {
  console.log('[Service Worker] Activating...');
  event.waitUntil(
    caches.keys().then((cacheNames) => {
      return Promise.all(
        cacheNames
          .filter((name) => name !== CACHE_NAME && name !== DYNAMIC_CACHE)
          .map((name) => caches.delete(name))
      );
    })
  );
  self.clients.claim();
});

const USASYNC = false;
// PER ATTIVARE IL SYNC TOGLI L'AREA COMMENTATA DI 'FETCH' QUI SOTTO ....
/*
// Strategia fetch
self.addEventListener('fetch', (event) => {
  const { request } = event;
  const url = new URL(request.url);

  // ============================================
  // IMPORTANTE: NON cachare API /sync o /loadsite
  // ============================================
  if (url.pathname.includes('/api/') ||
      url.pathname.includes('/sync') ||
      url.pathname.includes('/loadsite')) {
    // Lascia passare normalmente - IndexedDB gestisce cache
    return;
  }

  // ============================================
  // Cache Strategy per assets statici
  // ============================================
  if (request.method === 'GET') {
    event.respondWith(
      caches.match(request).then((cachedResponse) => {
        if (cachedResponse) {
          return cachedResponse;
        }

        return fetch(request).then((response) => {
          // Non cachare se non è successo
          if (!response || response.status !== 200 || response.type !== 'basic') {
            return response;
          }

          // Clona e salva in cache
          const responseToCache = response.clone();
          caches.open(CACHE_NAME).then((cache) => {
            cache.put(request, responseToCache);
          });

          return response;
        }).catch(() => {
          // Offline fallback
          if (request.destination === 'document') {
            return caches.match('/offline.html');
          }
        });
      })
    );
  }
});
*/

console.log(
  '   [  VER-' +
    VITE_APP_VERSION +
    ' ] _---------________------  PAO: this is my custom service worker: '
);

try {
  importScripts('/js/idb.js', '/js/storage.js');
  console.log('Local scripts imported successfully.');
} catch (error) {
  console.error('Failed to import local scripts ❌:', error);
}

let port = self.location.hostname.startsWith('test') ? 3001 : 3000;
let ISTEST = self.location.hostname.startsWith('test');
let ISLOCALE = self.location.hostname.startsWith('localhost');
console.log('SW- app ver ' + VITE_APP_VERSION);

// Function helpers
async function writeData(table, data) {
  console.log('writeData', table, data);
  await idbKeyval.setdata(table, data);
}

async function readAllData(table) {
  return idbKeyval.getalldata(table);
}

async function clearAllData(table) {
  await idbKeyval.clearalldata(table);
}

async function deleteItemFromData(table, id) {
  await idbKeyval.deletedata(table, id);
}

if (workbox) {
  /*if (process.env.MODE !== 'ssr' || process.env.PROD) {
    registerRoute(
      new NavigationRoute(
        createHandlerBoundToURL(process.env.PWA_FALLBACK_HTML),
        { denylist: [new RegExp(process.env.PWA_SERVICE_WORKER_REGEX), /workbox\workbox-(.)*\.js$/] }
      )
    )
  }*/

  // Static assets (JS, CSS, Fonts) - CacheFirst: caricamento rapidissimo
  registerRoute(
    ({ request }) => ['script', 'style', 'font'].includes(request.destination),
    new CacheFirst({
      cacheName: `${CACHE_PREFIX}-static-assets-${CACHE_VERSION}`,
      plugins: [
        new CacheableResponsePlugin({ statuses: [0, 200] }),
        new ExpirationPlugin({ maxEntries: 50, maxAgeSeconds: 30 * 24 * 60 * 60 }), // 30 giorni
      ],
    })
  );

  // Immagini - CacheFirst con scadenza e limite
  registerRoute(
    ({ request }) => request.destination === 'image',
    new CacheFirst({
      cacheName: `${CACHE_PREFIX}-images-${CACHE_VERSION}`,
      plugins: [
        new CacheableResponsePlugin({ statuses: [0, 200] }),
        new ExpirationPlugin({ maxEntries: 60, maxAgeSeconds: 30 * 24 * 60 * 60 }), // 30 giorni
      ],
    })
  );

  // Google Fonts - StaleWhileRevalidate per aggiornamenti trasparenti
  registerRoute(
    /^https:\/\/fonts\.(?:googleapis|gstatic)\.com/,
    new StaleWhileRevalidate({
      cacheName: `${CACHE_PREFIX}-google-fonts-${CACHE_VERSION}`,
      plugins: [
        new CacheableResponsePlugin({ statuses: [0, 200] }),
        new ExpirationPlugin({ maxEntries: 30 }),
      ],
    })
  );

  // HTML documents - NetworkFirst: garantisce contenuti aggiornati e fallback cache
  registerRoute(
    ({ request }) => request.destination === 'document',
    new NetworkFirst({
      cacheName: `${CACHE_PREFIX}-html-cache-${CACHE_VERSION}`,
      networkTimeoutSeconds: 10, // timeout rapido
      plugins: [
        new CacheableResponsePlugin({ statuses: [0, 200] }),
        new ExpirationPlugin({ maxEntries: 50, maxAgeSeconds: 24 * 60 * 60 }), // 1 giorno
      ],
    })
  );

  // API calls - NetworkFirst con timeout breve
  registerRoute(
    ({ url }) => url.hostname === API_DOMAIN,
    new NetworkFirst({
      cacheName: `${CACHE_PREFIX}-api-cache-${CACHE_VERSION}`,
      networkTimeoutSeconds: 5,
      plugins: [
        new CacheableResponsePlugin({ statuses: [0, 200] }),
        new ExpirationPlugin({ maxEntries: 100, maxAgeSeconds: 5 * 60 }), // 5 minuti
      ],
    })
  );
}

// Generate UUID per sync
function generateUUID() {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
    const r = (Math.random() * 16) | 0,
      v = c === 'x' ? r : (r & 0x3) | 0x8;
    return v.toString(16);
  });
}

let syncStore = {};

// Message event handler
self.addEventListener('message', (event) => {
  if (event.data && event.data.type === 'SKIP_WAITING') {
    self.skipWaiting();
    // Opzionale: rispondi al client
    if (event.ports && event.ports[0]) {
      event.ports[0].postMessage({ success: true });
    }
  }
  if (event.data.type === 'sync') {
    console.log('addEventListener - message');
    const id = generateUUID();
    syncStore[id] = event.data;
    self.registration.sync.register(id);
  }
  console.log(event.data);
});

// Funzione per gestire richieste API
async function handleApiRequest(request) {
  try {
    const response = await fetch(request);

    // Se la risposta non è valida, restituisci un errore personalizzato
    if (!response.ok) {
      console.warn('[SW] API Response Error:', response.status, response.statusText);
      return new Response(
        JSON.stringify({
          error: 'API error',
          message: `❌ Invalid response from API: ${response.status} ${response.statusText}`,
        }),
        { status: response.status, headers: { 'Content-Type': 'application/json' } }
      );
    }

    return response;
  } catch (error) {
    console.error('[Service Worker] API request error ❌:', error);

    // Restituisci una risposta di errore personalizzata
    return new Response(
      JSON.stringify({
        error: 'Network error',
        message: '❌ Unable to fetch from API: ' + error.message,
      }),
      { status: 503, headers: { 'Content-Type': 'application/json' } }
    );
  }
}

// Funzione per effettuare una richiesta di rete e memorizzare nella cache
async function fetchAndCache(request) {
  const cache = await caches.open(DYNAMIC_CACHE);
  try {
    const response = await fetch(request);

    // Clona e salva la risposta nella cache solo se valida
    if (response.ok) {
      const responseClone = response.clone();
      cache.put(request, responseClone);
    }

    return response;
  } catch (error) {
    console.error('[SW] Fetch and cache error ❌:', error);
    throw error;
  }
}

// Strategia di caching: stale-while-revalidate
async function cacheWithStaleWhileRevalidate(request, event) {
  const cache = await caches.open(DYNAMIC_CACHE);

  // Prova a recuperare la risorsa dalla cache
  const cachedResponse = await cache.match(request);
  if (cachedResponse) {
    // Aggiorna in background mentre restituisci la risposta in cache
    event.waitUntil(
      fetchAndCache(request).catch((error) => {
        console.error('[SW] Background fetch and cache error ❌:', error);
      })
    );
    return cachedResponse;
  }

  // Se non è in cache, fai la richiesta di rete
  try {
    return await fetchAndCache(request);
  } catch (error) {
    console.error('[SW] Cache miss and network error ❌:', error);

    // Restituisci una risposta di fallback personalizzata
    return new Response(
      JSON.stringify({
        error: 'Network error',
        message: 'Unable to fetch resource from network or cache.',
      }),
      { status: 503, headers: { 'Content-Type': 'application/json' } }
    );
  }
}

// Listener per gestire tutte le richieste
/*self.addEventListener('fetch', (event) => {
  const { request } = event;
  const url = new URL(request.url);
  try {
    // Ignora richieste non gestibili
    if (request.method !== 'GET' || url.protocol !== 'https:') {
      return;
    }

    // Ignora richieste per file di sviluppo (es. /src/)
    if (url.pathname.startsWith('/src/') || url.search.includes('vue&type')) {
      return;
    }

    // Gestione richieste API
    if (url.hostname === API_DOMAIN) {
      if (debug) console.log("E' una RICHIESTA API!");
      event.respondWith(handleApiRequest(request));
      return;
    }

    // Gestione risorse statiche e altre richieste
    if (debug) console.log("E' una RICHIESTA statica...");
    event.respondWith(cacheWithStaleWhileRevalidate(request, event));
  } catch (error) {
    console.error('[Service Worker] Fetch error ❌:', error);
  }
});
*/

// Gestione degli errori non catturati
self.addEventListener('unhandledrejection', (event) => {
  console.error('[Service Worker] Unhandled rejection ❌:', event.reason);
});

// Gestione degli errori globali
self.addEventListener('error', (event) => {
  console.error('[Service Worker] Global error ❌:', event.error);
});

// Background Sync event
self.addEventListener('sync', (event) => {
  console.log('[Service Worker V5] Background syncing', event);

  let mystrparam = event.tag;
  let multiparams = mystrparam.split('|');
  if (multiparams && multiparams.length > 3) {
    let [cmd, table, method, token, refreshToken, browser_random] = multiparams;

    if (cmd === 'sync-todos') {
      console.log('[Service Worker] Syncing', cmd, table, method);

      const headers = new Headers();
      headers.append('content-Type', 'application/json');
      headers.append('Accept', 'application/json');
      headers.append('x-auth', token);
      headers.append('x-refrtok', refreshToken);
      headers.append('x-browser-random', browser_random);

      event.waitUntil(
        readAllData(table).then((alldata) => {
          const myrecs = [...alldata];
          let errorfromserver = false;

          if (myrecs) {
            let promiseChain = Promise.resolve();

            for (let rec of myrecs) {
              //TODO: Risistemare con calma... per ora non penso venga usato...
              let link = cfgenv.serverweb + '/todos';
              if (method !== 'POST') link += '/' + rec._id;

              promiseChain = promiseChain.then(() =>
                fetch(link, {
                  method: method,
                  headers: headers,
                  cache: 'no-cache',
                  mode: 'cors',
                  body: JSON.stringify(rec),
                })
                  .then(() => {
                    deleteItemFromData(table, rec._id);
                    deleteItemFromData('swmsg', mystrparam);
                  })
                  .catch((err) => {
                    if (err.message === 'Failed to fetch') {
                      errorfromserver = true;
                    }
                  })
              );
            }

            return promiseChain.then(() => {
              const mystate = !errorfromserver ? 'online' : 'offline';
              writeData('config', { _id: 2, stateconn: mystate });
            });
          }
        })
      );
    }
  }

  // Sync per notifiche (se necessario)
  if (event.tag === 'sync-notifications') {
    event.waitUntil(
      Promise.resolve().then(() => {
        console.log('[SW] Syncing notifications');
      })
    );
  }
});

// ========================================
// 🔔 PUSH NOTIFICATIONS - BACKWARD COMPATIBLE VERSION
// ========================================

// Push event - BACKWARD COMPATIBLE con formato vecchio E nuovo
self.addEventListener('push', (event) => {
  console.log('[Service Worker] 🔔 Push notification received:', event);

  // Default data - supporta ENTRAMBI i formati (vecchio e nuovo)
  let data = {
    title: 'New!',
    body: 'Something new happened!',
    content: 'Something new happened!', // VECCHIO formato
    icon: '/images/android-chrome-192x192.png', // VECCHIO path
    badge: '/images/badge-96x96.png', // VECCHIO path
    tag: 'default',
    url: '/',
    requireInteraction: false,
    notificationType: null,
    rideId: null,
    fromUser: null,
    actions: []
  };

  // Parse del payload se presente
  if (event.data) {
    try {
      const payload = event.data.json();
      data = { ...data, ...payload };

      // BACKWARD COMPATIBILITY: Se c'è 'content' ma non 'body', usa 'content'
      if (payload.content && !payload.body) {
        data.body = payload.content;
      }
      // Se c'è 'body' ma non 'content', sincronizza
      if (payload.body && !payload.content) {
        data.content = payload.body;
      }

      console.log('[SW] 📦 Parsed notification payload:', data);
    } catch (e) {
      console.warn('[SW] ⚠️ Failed to parse push payload as JSON, using text');
      const textData = event.data.text();
      data.body = textData;
      data.content = textData;
    }
  }

  // Configura le actions SOLO se c'è un notificationType (nuovo formato)
  if (data.notificationType && (!data.actions || data.actions.length === 0)) {
    data.actions = getNotificationActions(data.notificationType, data.rideId);
  }

  // Opzioni della notifica - supporta ENTRAMBI i path delle icone
  const options = {
    body: data.body || data.content, // Fallback a 'content' se 'body' non c'è
    icon: data.icon,
    badge: data.badge,
    tag: data.tag,
    requireInteraction: data.requireInteraction || false,
    vibrate: data.vibrate || [200, 100, 200],
    data: {
      dateOfArrival: Date.now(),
      url: data.url || '/',
      rideId: data.rideId,
      notificationType: data.notificationType,
      fromUser: data.fromUser,
      // BACKWARD COMPATIBILITY: mantieni anche il formato vecchio
      legacyFormat: !data.notificationType // true se è formato vecchio
    },
    actions: data.actions || []
  };

  // Mostra la notifica
  event.waitUntil(
    self.registration.showNotification(data.title, options).then(() => {
      console.log('[SW] ✅ Notification displayed successfully');

      // Salva la notifica in IndexedDB - BACKWARD COMPATIBLE
      const myid = data.id || generateUUID();
      self.registration.sync.register(myid);

      // Formato compatibile: se è vecchio formato usa solo _id e tag
      const notificationData = options.data.legacyFormat
        ? { _id: myid, tag: options.tag }
        : {
            _id: myid,
            tag: options.tag,
            type: data.notificationType,
            timestamp: Date.now()
          };

      writeData('notifications', notificationData).catch(err => {
        console.error('[SW] Failed to save notification to IndexedDB:', err);
      });
    })
  );
});

// Funzione helper per generare actions (SOLO per nuovo formato)
function getNotificationActions(notificationType, rideId) {
  const actions = [];

  switch (notificationType) {
    case 'newRideRequest':
      actions.push(
        { action: 'view-requests', title: '👀 Visualizza richieste' },
        { action: 'dismiss', title: '❌ Ignora' }
      );
      break;

    case 'requestAccepted':
      actions.push(
        { action: 'view-ride', title: '🚗 Vedi viaggio' },
        { action: 'message', title: '💬 Messaggio' }
      );
      break;

    case 'requestRejected':
      actions.push(
        { action: 'search-rides', title: '🔍 Cerca altri viaggi' }
      );
      break;

    case 'newMessage':
      actions.push(
        { action: 'open-chat', title: '💬 Apri chat' },
        { action: 'dismiss', title: '✓ OK' }
      );
      break;

    case 'rideReminder':
      actions.push(
        { action: 'view-ride', title: '📍 Vedi dettagli' },
        { action: 'dismiss', title: '✓ OK' }
      );
      break;

    case 'rideCancelled':
      actions.push(
        { action: 'search-rides', title: '🔍 Cerca alternativa' }
      );
      break;

    case 'feedbackRequest':
      actions.push(
        { action: 'leave-feedback', title: '⭐ Lascia feedback' },
        { action: 'dismiss', title: 'Dopo' }
      );
      break;

    case 'newFeedbackReceived':
      actions.push(
        { action: 'view-feedback', title: '⭐ Vedi feedback' }
      );
      break;

    default:
      actions.push(
        { action: 'open-app', title: '📱 Apri app' }
      );
  }

  return actions;
}

// Notification click event - BACKWARD COMPATIBLE
self.addEventListener('notificationclick', (event) => {
  console.log('[Service Worker] 🖱️ Notification clicked:', event);
  console.log('[SW] Action:', event.action);
  console.log('[SW] Notification data:', event.notification.data);

  // Chiudi la notifica
  event.notification.close();

  // Estrai i dati dalla notifica
  const notificationData = event.notification.data || {};
  const isLegacyFormat = notificationData.legacyFormat || false;

  let finalUrl;

  // BACKWARD COMPATIBILITY: Se è formato vecchio, usa solo notification.data.url
  if (isLegacyFormat || !notificationData.notificationType) {
    console.log('[SW] 📜 Using legacy notification format');
    finalUrl = notificationData.url || '/';
  } else {
    // NUOVO formato: usa il routing intelligente
    console.log('[SW] 🆕 Using new notification format with smart routing');
    const rideId = notificationData.rideId;
    const notificationType = notificationData.notificationType;
    const action = event.action;

    finalUrl = determineUrlFromNotification(action, notificationType, rideId);
  }

  console.log('[SW] 🎯 Navigating to:', finalUrl);

  // Se finalUrl è null (action 'dismiss'), non fare nulla
  if (!finalUrl) {
    console.log('[SW] Action dismissed, no navigation');
    return;
  }

  // Apri l'URL appropriato
  event.waitUntil(
    clients.matchAll({ type: 'window', includeUncontrolled: true })
      .then((clientList) => {
        console.log('[SW] Found', clientList.length, 'open windows');

        // Cerca una finestra già aperta con l'URL desiderato
        for (const client of clientList) {
          if (client.url.includes(finalUrl.split('?')[0]) && 'focus' in client) {
            console.log('[SW] ✅ Focusing existing window');
            return client.focus();
          }
        }

        // Cerca una finestra dell'app aperta e naviga lì
        for (const client of clientList) {
          if (client.url.includes(self.location.origin) && 'navigate' in client) {
            console.log('[SW] ✅ Navigating existing window to:', finalUrl);
            return client.navigate(finalUrl).then(client => client.focus());
          }
        }

        // Altrimenti apri una nuova finestra
        if (clients.openWindow) {
          console.log('[SW] 🆕 Opening new window');
          return clients.openWindow(finalUrl);
        }
      })
      .catch((error) => {
        console.error('[SW] ❌ Error handling notification click:', error);
      })
  );
});

// Funzione per determinare l'URL (SOLO per nuovo formato)
function determineUrlFromNotification(action, notificationType, rideId) {
  // Gestisci prima le actions specifiche
  if (action) {
    switch (action) {
      case 'view-requests':
        return '/trasporti/miei-viaggi?tab=requests';

      case 'view-ride':
        return rideId ? `/trasporti/viaggio/${rideId}` : '/trasporti/miei-viaggi';

      case 'message':
      case 'open-chat':
        return rideId ? `/trasporti/chat?ride=${rideId}` : '/trasporti/chat';

      case 'search-rides':
        return '/trasporti?view=search';

      case 'leave-feedback':
        return rideId ? `/trasporti/feedback/${rideId}` : '/trasporti/feedback';

      case 'view-feedback':
        return '/trasporti/miei-feedback';

      case 'open-app':
        return '/trasporti';

      case 'dismiss':
        return null; // Non fare nulla

      default:
        break;
    }
  }

  // Se non c'è action, usa il tipo di notifica
  if (notificationType) {
    switch (notificationType) {
      case 'newRideRequest':
        return '/trasporti/miei-viaggi?tab=requests';

      case 'requestAccepted':
      case 'requestRejected':
      case 'rideReminder':
        return rideId ? `/trasporti/viaggio/${rideId}` : '/trasporti/miei-viaggi';

      case 'newMessage':
        return '/trasporti/chat';

      case 'rideCancelled':
        return '/trasporti/miei-viaggi?tab=cancelled';

      case 'feedbackRequest':
        return rideId ? `/trasporti/feedback/${rideId}` : '/trasporti/feedback';

      case 'newFeedbackReceived':
        return '/trasporti/miei-feedback';

      default:
        return '/trasporti';
    }
  }

  // Fallback
  return '/trasporti';
}

// Notification close event - tracking opzionale
self.addEventListener('notificationclose', (event) => {
  console.log('[Service Worker] 🔕 Notification closed:', event);

  const notificationData = event.notification.data || {};

  // Solo per nuovo formato, traccia le dismissioni
  if (!notificationData.legacyFormat && notificationData.notificationType) {
    writeData('notification-dismissals', {
      _id: generateUUID(),
      type: notificationData.notificationType,
      timestamp: Date.now(),
      tag: event.notification.tag
    }).catch(err => {
      console.error('[SW] Failed to track notification dismissal:', err);
    });
  }
});

console.log('***** 🚀 CUSTOM-SERVICE-WORKER.JS - BACKWARD COMPATIBLE VERSION ***** ');