import clone from '../../../utils/utils'

class WmsLayerList {
  constructor () {
    // [{图层名称：[{typeName:xxx,filter:yyy}]}]
    this.layers = []
  }

  addConfig (config) {
    const typeName = config.typeName
    const layerGroup = config.layerGroup || typeName
    const filter = config.filter
    const index = config.index || 9
    if (layerGroup) {
      this.addLayer(layerGroup, typeName, filter, index)
    }
  }

  addLayer (layerGroup, typeName, filter, index) {
    const layer = this._getLayer(layerGroup)

    if (layer) {
      const offset = this.indexOf(typeName, filter)
      if (offset < 0) {
        const layerConfig = layer[layerGroup]
        layerConfig.push({ typeName: typeName, filter: filter || 'INCLUDE' })
      }
    } else {
      const layerConfig = {}
      layerConfig[layerGroup] = [{ typeName: typeName, filter: filter || 'INCLUDE' }]
      this.layers.push(layerConfig)
    }
  }

  _getLayer (layer) {
    const layers = this.layers
    for (let i = 0; i < layers.length; i++) {
      const lay = layers[i]
      if (lay[layer]) {
        return lay
      }
    }
    return null
  }

  indexOf (typeName, filter) {
    filter = filter || 'INCLUDE'
    const layers = this.layers
    for (let i = 0; i < layers.length; i++) {
      const layer = layers[i]
      for (const k in layer) {
        const lay = layer[k]
        for (let j = 0; j < lay.length; j++) {
          const l = lay[j]
          if (typeName === l.typeName && filter === l.filter) {
            return j
          }
        }
      }
    }
    return -1
  }

  remove (typeName, filter) {
    filter = filter || 'INCLUDE'
    const layers = clone(this.layers)
    for (let j = 0; j < layers.length; j++) {
      const layer = layers[j]
      for (const k in layer) {
        /* if (typeName === k) {
          delete this.layers[j][k]
          break
        } */
        const layerConfig = layer[k]
        for (let i = 0; i < layerConfig.length; i++) {
          const lay = layerConfig[i]
          if (typeName === lay.typeName && filter === lay.filter) {
            this.layers[j][k].splice(i, 1)
            if (this.layers[j][k].length === 0) {
              this.layers.splice(j, 1)
            }
          }
        }
      }
    }
  }

  getLayers () {
    const layers = this.layers
    const _layers = []
    for (let i = 0; i < layers.length; i++) {
      const layer = layers[i]
      for (const k in layer) {
        _layers.push(k)
      }
    }
    return _layers.join(',')
  }

  getFilters () {
    const layers = this.layers
    const cqlFilters = []
    for (let i = 0; i < layers.length; i++) {
      const layer = layers[i]
      const filters = []
      for (const k in layer) {
        const layerConfig = layer[k]
        for (let i = 0; i < layerConfig.length; i++) {
          const filter = layerConfig[i].filter
          if (filter) {
            filters.push(filter)
          }
        }
      }
      cqlFilters.push(filters.join(' OR '))
    }
    return cqlFilters.join(';')
  }

  /**
   * 添加元素到指定位置
   * @param index
   * @param element
   * @private
   */
  _addIndex (index, element) {
    const newArr = []
    for (var i = this.dataSouce.length - 1; i > index - 1; i--) {
      newArr[i + 1] = this.dataSouce[i]
    }
    newArr[index] = element
    this.layers = newArr
  }
}

export default WmsLayerList