/**
 * 加载WMS,拼接FILTER,LAYERS参数等
 */
function WmsHelper () {
  this.filters = {}
  this.wmsLayersMap = {}

  this.initMapConfig = (mapConfig) => {
    var serviceLayers = mapConfig.ServiceLayers
    for (var i = 0; i < serviceLayers.length; i++) {
      var service = serviceLayers[i]
      var checked = service.checked
      if (!checked) {
        break
      }
      var filtersGroup = service.filtersGroup
      if (filtersGroup) {
        this.initLayer(service.code, filtersGroup)
      }
    }
  }
  this.initLayer = (wms, layersGroup) => {
    for (var i = 0; i < layersGroup.length; i++) {
      var filters = layersGroup[i].filters
      for (var j = 0; j < filters.length; j++) {
        var layer = filters[j]
        var checked = layer.checked
        // var code = layer.code
        var code = layer.name
        if (checked) {
          this.addLayer(wms, code)
        }
      }
    }
  }
  this.initFilter = () => {
    /* for (var i = 0; i < filters.length; i++) {
             var filter = filters[i]
             this.addFilter()
         } */
  }
  this.addLayer = (wms, layer) => {
    var wmsLayer = this.wmsLayersMap[wms]
    if (wmsLayer) {
      wmsLayer[wmsLayer.length] = layer
    } else {
      this.wmsLayersMap[wms] = [layer]
    }
  }
  this.addFilter = (condition) => {
    // var filter = this.filters[layer]
    // if (filter) {
    this.filters[this.filters.length] = condition
    // } else {
    //    this.filters[layer] = [condition]
    // }
  }
  this.getWmsLayersMap = () => {
    return this.wmsLayersMap
  }
  this.getFilterURL = () => {
    var filterURL = ''
    var conditions = ''
    for (var f in this.filters) {
      var filters = this.filters[f]
      for (var i = 0; i < filters.length; i++) {
        conditions += filters[i]
        if (i < filters.length) {
          conditions += ','
        }
      }
      filterURL += f + '.(' + conditions + ');'
    }
    return filterURL.substr(0, filterURL.length - 1)
  }
}

export default WmsHelper