import maplibregl from 'maplibre-gl'
import { Toast } from 'maps_maplibre/components/toast'
import { performanceMonitor } from 'maps_maplibre/utils/performance_monitor'

/**
 * Manages data loading and layer setup for the map
 */
export class MapDataManager {
  constructor(controller) {
    this.controller = controller
    this.map = controller.map
    this.dataLoader = controller.dataLoader
    this.layerManager = controller.layerManager
    this.filterManager = controller.filterManager
    this.eventHandlers = controller.eventHandlers
  }

  /**
   * Load map data from API and setup layers
   * @param {string} startDate - Start date for data range
   * @param {string} endDate - End date for data range
   * @param {Object} options - Loading options
   */
  async loadMapData(startDate, endDate, options = {}) {
    const {
      showLoading = true,
      fitBounds = true,
      showToast = true,
      onProgress = null
    } = options

    performanceMonitor.mark('load-map-data')

    if (showLoading) {
      this.controller.showLoading()
    }

    try {
      // Fetch data from API
      const data = await this.dataLoader.fetchMapData(
        startDate,
        endDate,
        showLoading ? onProgress : null
      )

      // Store visits for filtering
      this.filterManager.setAllVisits(data.visits)

      // Setup layers
      await this._setupLayers(data)

      // Fit bounds if requested
      if (fitBounds && data.points.length > 0) {
        this._fitMapToBounds(data.pointsGeoJSON)
      }

      // Show success message
      if (showToast) {
        const pointText = data.points.length === 1 ? 'point' : 'points'
        Toast.success(`Loaded ${data.points.length} location ${pointText}`)
      }

      return data
    } catch (error) {
      console.error('[MapDataManager] Failed to load map data:', error)
      Toast.error('Failed to load location data. Please try again.')
      throw error
    } finally {
      if (showLoading) {
        this.controller.hideLoading()
      }
      const duration = performanceMonitor.measure('load-map-data')
      console.log(`[Performance] Map data loaded in ${duration}ms`)
    }
  }

  /**
   * Setup all map layers with loaded data
   * @private
   */
  async _setupLayers(data) {
    const addAllLayers = async () => {
      await this.layerManager.addAllLayers(
        data.pointsGeoJSON,
        data.routesGeoJSON,
        data.visitsGeoJSON,
        data.photosGeoJSON,
        data.areasGeoJSON,
        data.tracksGeoJSON,
        data.placesGeoJSON
      )

      // Setup event handlers after layers are added
      this.layerManager.setupLayerEventHandlers({
        handlePointClick: this.eventHandlers.handlePointClick.bind(this.eventHandlers),
        handleVisitClick: this.eventHandlers.handleVisitClick.bind(this.eventHandlers),
        handlePhotoClick: this.eventHandlers.handlePhotoClick.bind(this.eventHandlers),
        handlePlaceClick: this.eventHandlers.handlePlaceClick.bind(this.eventHandlers),
        handleAreaClick: this.eventHandlers.handleAreaClick.bind(this.eventHandlers),
        handleRouteClick: this.eventHandlers.handleRouteClick.bind(this.eventHandlers),
        handleRouteHover: this.eventHandlers.handleRouteHover.bind(this.eventHandlers),
        handleRouteMouseLeave: this.eventHandlers.handleRouteMouseLeave.bind(this.eventHandlers),
        clearRouteSelection: this.eventHandlers.clearRouteSelection.bind(this.eventHandlers)
      })
    }

    // Always use Promise-based approach for consistent timing
    await new Promise((resolve) => {
      if (this.map.loaded()) {
        addAllLayers().then(resolve)
      } else {
        this.map.once('load', async () => {
          await addAllLayers()
          resolve()
        })
      }
    })
  }

  /**
   * Fit map to data bounds
   * @private
   */
  _fitMapToBounds(geojson) {
    if (!geojson?.features?.length) {
      return
    }

    const coordinates = geojson.features.map(f => f.geometry.coordinates)

    const bounds = coordinates.reduce((bounds, coord) => {
      return bounds.extend(coord)
    }, new maplibregl.LngLatBounds(coordinates[0], coordinates[0]))

    this.map.fitBounds(bounds, {
      padding: 50,
      maxZoom: 15
    })
  }
}