import WfsLayerService from './WfsLayerService'
import { logicMapper, SERVICE_TYPE } from '../../../conf/Constants'
import WmsLayerService from './WmsLayerService'

/**
 *  init 只初始化一次
 *  start 每次调用图层显示show()时，都会调用
 *  destory 每次调用图层隐藏hide()时，都会调用
 *
 */
class LayerFactory {
  constructor (options) {
    this.L = options.L
    this.map = window.map
    this.layers = {}
    this.layersLogic = {}
    this.minZoomLayers = {}
    this.wmsLayers = []
    this.wmsLayerService = null
  }

  init (layerConfig) {
    // wms服务只需要初始化一次
    this.wmsLayerService = new WmsLayerService()
    this.wmsLayerService.init()
    this.initConfig(layerConfig)
  }

  initConfig (layerConfig) {
    // 1. 遍历layer config
    if (layerConfig) {
      for (var i = 0; i < layerConfig.length; i++) {
        var config = layerConfig[i]
        var layers = config.layers
        var childLayer = config.childLayer
        var checked = config.checked
        /* if (config.groupName) {
          const wmsGroupLayerService = new WmsLayerGroupService(config)
          wmsGroupLayerService.init()
          continue
        } */
        layers && this.initConfig(config.layers)
        childLayer && this.initConfig(config.childLayer)

        this.initMinZoom(config)
        this.loadLogic(config)
        checked && this.show(config)
      }
    }
  }

  initMinZoom (config) {
    const minZoom = parseInt(config.minZoom)
    if (minZoom) {
      var configs = this.minZoomLayers[minZoom]
      if (configs) {
        configs[configs.length] = config
      } else {
        configs = [config]
      }
      this.minZoomLayers[minZoom] = configs
    }
  }

  loadLogic (config) {
    var code = config.code
    var type = config.type

    const file = logicMapper[code]
    var logic = this.layersLogic[code]
    if (!logic) {
      if (file) {
        var BusiLayer = require('../logic/' + file)
        logic = new BusiLayer()
      } else if (type === SERVICE_TYPE.WFS) {
        logic = new WfsLayerService(config)
      }
    }
    this.layersLogic[code] = logic
    return logic
  }

  /**
   * 1. 先调用处理逻辑的 initLayer ，如果没有 就创建一个 featureGroup
   * 2. 如果存在事件逻辑的话，绑定tooltip,click事件
   * 3. 将layer添加到map
   * 4. 返回layer
   * @param config
   * @returns layer
   */
  addLayer (config) {
    var code = config.code
    var logic = this.loadLogic(config)
    var layer = (logic && logic.initLayer && logic.initLayer((this.L))) || this.L.featureGroup({})

    if (logic.bindTooltip) {
      // 全局tips位置
      layer.bindTooltip(logic.bindTooltip, { direction: 'top', offset: [0, -15], sticky: false })
    }
    // 调用click事件
    if (logic.clickListener) {
      layer.on('click', logic.clickListener)
    }
    layer.addTo(this.map)
    this.layers[code] = layer
    return layer
  }

  showAll (configs) {
    if (Array.isArray(configs)) {
      for (let i = 0; i < configs.length; i++) {
        const config = configs[i]
        this.show(config)
      }
      this.wmsLayerService && this.wmsLayerService.addAll(configs)
    }
  }

  /**
   * 如果 存在已经加载了的对象，就直接加到map
   * 如果 不存在则 调用 addLayer 及 逻辑类的init 进行初始化操作
   * 如果 存在start函数，则调用
   * @param config
   */
  show (config) {
    var index = config.index
    var layer = this.layers[config.code]
    var logic = this.loadLogic(config)
    if (layer) {
      if (!this.map.hasLayer(layer)) {
        index && layer.setZIndex(index)
        layer.addTo(this.map)
      }
    } else {
      logic && logic.init(this.addLayer(config), this.L, config)
    }
    logic && logic.start && logic.start()
    this.wmsLayerService && this.wmsLayerService.add(config)
  }

  hideAll (configs) {
    if (Array.isArray(configs)) {
      for (let i = 0; i < configs.length; i++) {
        this.hide(configs[i])
      }
      this.wmsLayerService && this.wmsLayerService.removeAll(configs)
    }
  }

  hide (config) {
    const code = config.code
    const layer = this.layers[code]
    layer && this.map.removeLayer(layer)
    const logic = this.loadLogic(config)
    logic && logic.destory && logic.destory()
    this.wmsLayerService && this.wmsLayerService.remove(config)
  }

  /**
     * 控制显示的级别
     * @param layerConfig
     */
  initEvent (layerConfig) {
    // this.map.on('zoomend ', () => this.toggleByZoom())
  }

  toggleByZoom () {
    const zoom = this.map.getZoom()
    for (var k in this.minZoomLayers) {
      const configs = this.minZoomLayers[k]
      for (var j in configs) {
        const config = configs[j]
        const checked = config.checked
        // console.log(zoom)
        // console.log(k)
        if (checked && zoom > k) {
          this.show(config)
        } else if (checked && zoom < k) {
          this.hide(config)
        }
      }
    }
  }
}

export default LayerFactory