'use client'

import React, { useEffect, useCallback, useState } from 'react'
import { useRouter, useSearchParams } from 'next/navigation' 
import Sidebar from '../../../components/ui/Sidebar'
import useNavigationStore from '../../store/navigationStore'
import Monitoring from '../../../components/navigation/Monitoring'
import FloorNavigation from '../../../components/navigation/FloorNavigation'
import DetectorMenu from '../../../components/navigation/DetectorMenu'
import Notifications from '../../../components/notifications/Notifications'
import NotificationDetectorInfo from '../../../components/notifications/NotificationDetectorInfo'
import dynamic from 'next/dynamic'
import type { ModelViewerProps } from '../../../components/model/ModelViewer'

const ModelViewer = dynamic<ModelViewerProps>(() => import('../../../components/model/ModelViewer'), {
   ssr: false,
   loading: () => (
     <div className="w-full h-full flex items-center justify-center bg-[#0e111a]">
       <div className="text-gray-300 animate-pulse">Загрузка 3D-модуля…</div>
     </div>
   ),
 })

interface DetectorType {
  detector_id: number
  name: string
  serial_number: string
  object: string
  status: string
  checked: boolean
  type: string
  detector_type: string
  location: string
  floor: number
  notifications: Array<{
    id: number
    type: string
    message: string
    timestamp: string
    acknowledged: boolean
    priority: string
  }>
}

interface NotificationType {
  id: number
  detector_id: number
  detector_name: string
  type: string
  status: string
  message: string
  timestamp: string
  location: string
  object: string
  acknowledged: boolean
  priority: string
}

const NavigationPage: React.FC = () => {
  const router = useRouter()
  const searchParams = useSearchParams()
  const { 
    currentObject, 
    setCurrentObject,
    showMonitoring,
    showFloorNavigation, 
    showNotifications,
    selectedDetector,
    showDetectorMenu,
    selectedNotification,
    showNotificationDetectorInfo,
    closeMonitoring,
    closeFloorNavigation,
    closeNotifications,
    setSelectedDetector,
    setShowDetectorMenu,
    setSelectedNotification,
    setShowNotificationDetectorInfo
  } = useNavigationStore()
  
  const [detectorsData, setDetectorsData] = useState<{ detectors: Record<string, DetectorType> }>({ detectors: {} })
  const [detectorsError, setDetectorsError] = useState<string | null>(null)
  const [modelError, setModelError] = useState<string | null>(null)
  const [isModelReady, setIsModelReady] = useState(false)
  
  const urlObjectId = searchParams.get('objectId')
  const urlObjectTitle = searchParams.get('objectTitle')
  const objectId = currentObject.id || urlObjectId
  const objectTitle = currentObject.title || urlObjectTitle
  const [selectedModelPath, setSelectedModelPath] = useState<string>('')
  
  const handleModelLoaded = useCallback(() => { 
    setIsModelReady(true)
    setModelError(null)
  }, [])

  const handleModelError = useCallback((error: string) => {
    console.error('Model loading error:', error)
    setModelError(error)
    setIsModelReady(false)
  }, [])

  useEffect(() => {
    if (urlObjectId && urlObjectTitle && (!currentObject.id || currentObject.id !== urlObjectId)) {
      setCurrentObject(urlObjectId, urlObjectTitle)
    }
  }, [urlObjectId, urlObjectTitle, currentObject.id, setCurrentObject])

  useEffect(() => {
    const loadDetectors = async () => {
      try {
        setDetectorsError(null)
        const res = await fetch('/api/get-detectors', { cache: 'no-store' })
        const text = await res.text()
        let payload: any
        try { payload = JSON.parse(text) } catch { payload = text }
        console.log('[NavigationPage] GET /api/get-detectors', { status: res.status, payload })
        if (!res.ok) throw new Error(typeof payload === 'string' ? payload : (payload?.error || 'Не удалось получить детекторов'))
        const data = payload?.data ?? payload
        const detectors = (data?.detectors ?? {}) as Record<string, DetectorType>
        setDetectorsData({ detectors })
      } catch (e: any) {
        console.error('Ошибка загрузки детекторов:', e)
        setDetectorsError(e?.message || 'Ошибка при загрузке детекторов')
      }
    }
    loadDetectors()
  }, [])

  const handleBackClick = () => {
    router.push('/dashboard')
  }

  const handleDetectorMenuClick = (detector: DetectorType) => {
    // Для тестов. Выбор детектора.
    console.log('[NavigationPage] Selected detector click:', {
      detector_id: detector.detector_id,
      name: detector.name,
      serial_number: detector.serial_number,
    })

    // Проверяем, что детектор имеет необходимые данные
    if (!detector || !detector.detector_id || !detector.serial_number) {
      console.warn('[NavigationPage] Invalid detector data, skipping menu display:', detector)
      return
    }

    if (selectedDetector?.detector_id === detector.detector_id && showDetectorMenu) {
      setShowDetectorMenu(false)
      setSelectedDetector(null)
    } else {
      setSelectedDetector(detector)
      setShowDetectorMenu(true)
    }
  }

  const closeDetectorMenu = () => {
    setShowDetectorMenu(false)
    setSelectedDetector(null)
  }

  const handleNotificationClick = (notification: NotificationType) => {
    if (selectedNotification?.id === notification.id && showNotificationDetectorInfo) {
      setShowNotificationDetectorInfo(false)
      setSelectedNotification(null)
    } else {
      setSelectedNotification(notification)
      setShowNotificationDetectorInfo(true)
    }
  }

  const closeNotificationDetectorInfo = () => {
    setShowNotificationDetectorInfo(false)
    setSelectedNotification(null)
  }

  const getStatusText = (status: string) => {
    const s = (status || '').toLowerCase()
    switch (s) {
      case '#b3261e':
      case 'critical':
        return 'Критический'
      case '#fd7c22':
      case 'warning':
        return 'Предупреждение'
      case '#00ff00':
      case 'normal':
        return 'Норма'
      default:
        return 'Неизвестно'
    }
  }

  return (
    <div className="flex h-screen bg-[#0e111a]">
      <Sidebar 
        activeItem={2}
      />
      
      <div className="flex-1 flex flex-col relative">
        
        {showMonitoring && (
          <div className="absolute left-0 top-[73px] bottom-0 bg-[#161824] border-r border-gray-700 z-20 w-[500px]">
            <div className="h-full overflow-auto p-4">
              <Monitoring 
                objectId={objectId || undefined} 
                onClose={closeMonitoring}
                onSelectModel={(path) => {
                  setSelectedModelPath(path)
                  setModelError(null)
                  setIsModelReady(false)
                }}
              />
            </div>
          </div>
        )}

        {showFloorNavigation && (
          <div className="absolute left-0 top-[73px] bottom-0 bg-[#161824] border-r border-gray-700 z-20 w-[500px]">
            <div className="h-full overflow-auto p-4">
              <FloorNavigation 
                objectId={objectId || undefined}
                detectorsData={detectorsData}
                onDetectorMenuClick={handleDetectorMenuClick}
                onClose={closeFloorNavigation}
                is3DReady={isModelReady && !modelError}
              />
            </div>
          </div>
        )}
 
        {showNotifications && (
          <div className="absolute left-0 top-[73px] bottom-0 bg-[#161824] border-r border-gray-700 z-20 w-[500px]">
            <div className="h-full overflow-auto p-4">
              <Notifications 
                objectId={objectId || undefined}
                detectorsData={detectorsData}
                onNotificationClick={handleNotificationClick}
                onClose={closeNotifications}
              />
              {detectorsError && (
                <div className="mt-2 text-sm text-red-400">{detectorsError}</div>
              )}
            </div>
          </div>
        )}

        {showNotifications && showNotificationDetectorInfo && selectedNotification && (() => {
          const detectorData = Object.values(detectorsData.detectors).find(
            detector => detector.detector_id === selectedNotification.detector_id
          );
          return detectorData ? (
            <div className="absolute left-[500px] top-[73px] bottom-0 bg-[#161824] border-r border-gray-700 z-30 w-[454px]">
              <div className="h-full overflow-auto p-4">
                <NotificationDetectorInfo 
                  detectorData={detectorData}
                  onClose={closeNotificationDetectorInfo}
                />
              </div>
            </div>
          ) : null;
        })()}
        
        {showFloorNavigation && showDetectorMenu && selectedDetector && (
          null
        )}

        <header className="bg-[#161824] border-b border-gray-700 px-6 h-[73px] flex items-center">
          <div className="flex items-center justify-between w-full">
            <div className="flex items-center gap-4">
              <button 
                onClick={handleBackClick}
                className="text-gray-400 hover:text-white transition-colors"
                aria-label="Назад к дашборду"
              >
                <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 19l-7-7 7-7" />
                </svg>
              </button>
              <nav className="flex items-center gap-2 text-sm">
                <span className="text-gray-400">Дашборд</span>
                <span className="text-gray-600">/</span>
                <span className="text-white">{objectTitle || 'Объект'}</span>
                <span className="text-gray-600">/</span>
                <span className="text-white">Навигация</span>
              </nav>
            </div>
          </div>
        </header>
        
        <div className="flex-1 overflow-hidden">
          <div className="h-full">
            {modelError ? (
              <div className="h-full flex items-center justify-center bg-[#0e111a]">
                <div className="text-center p-8 bg-[#161824] rounded-lg border border-gray-700 max-w-md">
                  <div className="text-red-400 text-lg font-semibold mb-4">
                    Ошибка загрузки 3D модели
                  </div>
                  <div className="text-gray-300 mb-4">
                    {modelError}
                  </div>
                  <div className="text-sm text-gray-400">
                    Используйте навигацию по этажам для просмотра детекторов
                  </div>
                </div>
              </div>
            ) : (
              <ModelViewer 
                modelPath={selectedModelPath}
                onModelLoaded={handleModelLoaded}
                onError={handleModelError}
                focusSensorId={selectedDetector?.serial_number ?? null}
                renderOverlay={({ anchor }) => (
                  selectedDetector && showDetectorMenu && anchor ? (
                    <DetectorMenu
                      detector={selectedDetector}
                      isOpen={true}
                      onClose={closeDetectorMenu}
                      getStatusText={getStatusText}
                      compact={true}
                      anchor={anchor}
                    />
                  ) : null
                )}
              />
            )}
          </div>
        </div>
      </div>
    </div>
  )
}

export default NavigationPage