import { ref } from 'vue';
import { useRuntimeConfig } from '#app';
import { useWebSocket } from '@/composables/useWebSocket';
import type { QueuePatient } from '@/types/queue';

export interface QueueSyncDeps {
  allPatients: Ref<QueuePatient[]>;
  currentProcessingPatient: Ref<Record<string, QueuePatient>>;
  activeLoketInterest: Ref<Record<string, number>>;
  activeClinicInterest: Ref<Record<string, number>>;
  globalInterestCount: Ref<number>;
  fetchPatientsForLoket: (id: string | number, force?: boolean) => void;
  fetchPatientsForClinic: (id: string, force?: boolean) => void;
  fetchAllPatients: () => void;
}

export const useQueueSync = (deps: QueueSyncDeps) => {
  const isWsConnected = ref<boolean>(false);
  const wsClientId = ref<string>(`client-${Math.random().toString(36).substring(7)}`);
  const lastGlobalCall = ref<any>(null);
  const lastKlinikCall = ref<any>(null);

  const onWsMessage = (data: any) => {
    // Robust data extraction: some relays wrap data in another 'data' property
    let messageData = data?.data || data;
    if (messageData?.data && !messageData.callKlinikEvent && !messageData.callEvent) {
       messageData = messageData.data; // Double wrap check
    }
    
    const targetLoketId = messageData?.loketId || messageData?.idloket;
    const targetKlinikId = messageData?.klinikId || messageData?.idklinik;

    // Handle Call Events and WS messages
    if (messageData?.triggerRefresh) {
      if (messageData.klinikId) {
        // console.log(`🔄 [queueSync] Received refresh trigger for clinic ${messageData.klinikId}`);
        
        // Handle current processing update if provided
        if (messageData.currentProcessingUpdate) {
          // console.log(`🎯 [queueSync] Applying current processing update:`, messageData.currentProcessingUpdate);
          
          Object.keys(messageData.currentProcessingUpdate).forEach(key => {
            deps.currentProcessingPatient.value[key] = messageData.currentProcessingUpdate[key];
            
            // Also patch the status in allPatients if possible
            const processingPatient = messageData.currentProcessingUpdate[key];
            if (processingPatient && processingPatient.no) {
              const idx = deps.allPatients.value.findIndex(p => p.no === processingPatient.no);
              if (idx !== -1) {
                deps.allPatients.value[idx] = { ...deps.allPatients.value[idx], status: 'di-loket' };
              }
            }
          });
        }
        
        deps.fetchPatientsForClinic(messageData.klinikId, true);
      }
    }
    if (messageData?.callEvent) {
      lastGlobalCall.value = messageData.callEvent;
    }

    // Handle Klinik Call Events (cross-device sync for AntrianKlinikRuang display)
    if (messageData?.callKlinikEvent) {
      const ev = messageData.callKlinikEvent;
      // console.log('🏥 [queueSync] Klinik call event received:', ev);
      
      // PERSISTENCE FIX: Save to lastKlinikCall for displays to watch
      lastKlinikCall.value = ev;
      
      // Find the patient in allPatients and patch directly for immediate UI update
      const idx = deps.allPatients.value.findIndex(p =>
        p.processStage === 'klinik-ruang' &&
        p.kodeKlinik === ev.kodeKlinik &&
        (
          (p.barcode && String(p.barcode) === String(ev.barcode)) ||
          (p.noAntrian && p.noAntrian.split(' |')[0] === ev.noantrian)
        )
      );

      if (idx !== -1) {
        const updatedPatient = {
          ...deps.allPatients.value[idx],
          tipeLayanan: ev.tipeLayanan,
          lastCalledAt: ev.lastCalledAt || new Date().toISOString(),
          lastCalledTipeLayanan: ev.tipeLayanan,
          status: 'di-loket' as any,
          calledPemeriksaanAwal: ev.tipeLayanan === 'Pemeriksaan Awal' ? true : deps.allPatients.value[idx].calledPemeriksaanAwal,
          calledTindakan: ev.tipeLayanan === 'Tindakan' ? true : deps.allPatients.value[idx].calledTindakan
        };
        
        deps.allPatients.value[idx] = updatedPatient;
        // console.log(`✅ [queueSync] Successfully patched patient ${ev.noantrian} status to di-loket (lastCalledAt: ${updatedPatient.lastCalledAt})`);
      } else {
        console.warn(`⚠️ [queueSync] Patient ${ev.noantrian} not found in store for clinic ${ev.kodeKlinik}.`);
      }
    }
    // TRIGGER STRATEGIC REFRESHES
    let refreshedSomething = false;

    if (targetLoketId) {
      deps.fetchPatientsForLoket(targetLoketId, true);
      refreshedSomething = true;
    } 
    
    if (targetKlinikId) {
      const interestingClinics = Object.keys(deps.activeClinicInterest.value);
      if (interestingClinics.includes(String(targetKlinikId)) || targetKlinikId === 'broadcast') {
        const clinicToFetch = targetKlinikId === 'broadcast' ? interestingClinics[0] : targetKlinikId;
        deps.fetchPatientsForClinic(clinicToFetch, true);
        refreshedSomething = true;
      }
    } 
    
    if (deps.globalInterestCount.value > 0) {
      deps.fetchAllPatients();
      refreshedSomething = true;
    } 
    
    // ALWAYS refresh our own active interests when a WebSocket message is received
    const interestingLokets = Object.keys(deps.activeLoketInterest.value);
    const interestingClinics = Object.keys(deps.activeClinicInterest.value);
    
    if (interestingLokets.length > 0) {
      interestingLokets.forEach(loketId => { 
        if (String(loketId) !== String(targetLoketId)) {
          deps.fetchPatientsForLoket(loketId, true); 
          refreshedSomething = true;
        }
      });
    }
    
    if (interestingClinics.length > 0) {
      interestingClinics.forEach(kodeKlinik => { 
        if (String(kodeKlinik) !== String(targetKlinikId)) {
          deps.fetchPatientsForClinic(kodeKlinik, true); 
          refreshedSomething = true;
        }
      });
    }

    if (!refreshedSomething) {
      // console.log(`🔕 [queueSync] WS trigger received but no active interest matched. Skipping.`);
    }
  };

  const config = useRuntimeConfig();
  const wsBaseUrl = config.public?.wsBaseUrl || "ws://10.10.123.135:8084/api/v1/ws";

  const { connect, disconnect, sendViaPost, isConnected } = useWebSocket({
    url: wsBaseUrl,
    clientId: wsClientId,
    fallbackPostUrl: `${config.public.externalApiBaseUrl}/ws`,
    reconnectInterval: 2000,
    maxReconnectAttempts: 9999,
    onOpen: () => {
      // console.log('✅ [queueSync] WebSocket connected');
      isWsConnected.value = true;
    },
    onClose: () => {
      // console.log('❌ [queueSync] WebSocket disconnected');
      isWsConnected.value = false;
    },
    onError: (err: any) => {
      console.error('⚠️ [queueSync] WebSocket error:', err);
      isWsConnected.value = false;
    },
    onMessage: onWsMessage
  });

  let _autoSyncInterval: any = null;

  const startAutoSync = () => {
    if (typeof window === 'undefined') return;
    if (_autoSyncInterval) return;

    // console.log('🔄 [queueSync] Starting store-level auto-sync (30s interval)');

    _autoSyncInterval = setInterval(async () => {
      const hasLoketInterest = Object.keys(deps.activeLoketInterest.value).length > 0;
      const hasClinicInterest = Object.keys(deps.activeClinicInterest.value).length > 0;
      const hasGlobalInterest = deps.globalInterestCount.value > 0;

      if (hasGlobalInterest) {
        deps.fetchAllPatients();
      } else {
        if (hasLoketInterest) {
          Object.keys(deps.activeLoketInterest.value).forEach(loketId => {
            deps.fetchPatientsForLoket(loketId, true);
          });
        }
        if (hasClinicInterest) {
          Object.keys(deps.activeClinicInterest.value).forEach(kodeKlinik => {
            deps.fetchPatientsForClinic(kodeKlinik, true);
          });
        }
      }
    }, 30000); // 30 seconds
  };

  const stopAutoSync = () => {
    if (_autoSyncInterval) {
      clearInterval(_autoSyncInterval);
      _autoSyncInterval = null;
      // console.log('⏹️ [queueSync] Store-level auto-sync stopped');
    }
  };

  const initWebSocket = (customClientId: string | null = null) => {
    if (isConnected.value && customClientId === wsClientId.value) {
      // console.log('🔌 [queueSync] WebSocket already connected with same ID.');
      startAutoSync();
      return;
    }

    if (customClientId) {
      wsClientId.value = customClientId;
      disconnect();
    }

    // console.log(`🔌 [queueSync] Connecting to WebSocket: ${wsBaseUrl} as ${wsClientId.value}`);
    connect();
    startAutoSync();
  };

  return {
    isWsConnected,
    wsClientId,
    lastGlobalCall,
    lastKlinikCall,
    initWebSocket,
    disconnectWebSocket: disconnect,
    sendViaPost,
    startAutoSync,
    stopAutoSync
  };
};