/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import slideMixin from './slideMixin'

const DEFAULT_NEIGHBOR_SPACE = 20
const DEFAULT_NEIGHBOR_ALPHA = 0.6
const DEFAULT_NEIGHBOR_SCALE = 0.8
const DEFAULT_CURRENT_ITEM_SCALE = 0.9

const sliderNeighbor = {
  mixins: [slideMixin],
  props: {
    index: {
      type: [String, Number],
      default: 0
    },
    autoPlay: {
      type: [String, Boolean],
      default: false
    },
    interval: {
      type: [String, Number],
      default: 3000
    },
    infinite: {
      type: [String, Boolean],
      default: true
    },
    neighborSpace: {
      type: [String, Number],
      validator: function (val) {
        val = parseFloat(val)
        return !isNaN(val) && val > 0
      },
      default: DEFAULT_NEIGHBOR_SPACE
    },
    neighborAlpha: {
      type: [String, Number],
      validator: function (val) {
        val = parseFloat(val)
        return !isNaN(val) && val >= 0 && val <= 1
      },
      default: DEFAULT_NEIGHBOR_ALPHA
    },
    neighborScale: {
      type: [String, Number],
      validator: function (val) {
        val = parseFloat(val)
        return !isNaN(val) && val >= 0 && val <= 1
      },
      default: DEFAULT_NEIGHBOR_SCALE
    },
    currentItemScale: {
      type: [String, Number],
      validator: function (val) {
        val = parseFloat(val)
        return !isNaN(val) && val >= 0 && val <= 1
      },
      default: DEFAULT_CURRENT_ITEM_SCALE
    }
  },

  watch: {
    index () {
      this.currentIndex = this._normalizeIndex(this.index)
    }
  },

  data () {
    return {
      currentIndex: this.index,
      frameCount: 0
    }
  },

  beforeCreate () {
    this.isNeighbor = true
    this.weexType = 'slider-neighbor'
  },

  render (createElement) {
    return this._renderSlides(createElement)
  }
}

export default {
  init (weex) {
    weex.registerComponent('slider-neighbor', sliderNeighbor)
  }
}