/**
 * 监测因子图例
 */
const Legend = {
  S_TYPE: 0, //标准图例
  D_TYPE: 1, //动态图例
  C_TYPE: 2, //自定义范围图例

  //各监测因子数据分级（标准）
  _legend_r: {
    NO: [0, 100, 200, 700, 1200, 2340],
    NO2: [0, 100, 200, 700, 1200, 2340],
    CO: [0, 5, 10, 35, 60, 90],
    H2S: [0, 150, 500, 650, 800, 1600],
    SO2: [0, 150, 500, 650, 800, 1600],
    O3: [0, 160, 200, 300, 400, 800],
    PM25: [0, 35, 75, 115, 150, 250],
    PM10: [0, 50, 150, 250, 350, 420],
    VOC: [0, 200, 400, 600, 1000, 2000, 4000],
    TMP: [-10, 0, 10, 20, 30, 40],
    spC: [0, 200, 400, 600, 800, 1000],
    tur: [0, 50, 100, 150, 200, 250],
    DO: [0, 3, 5, 7, 9, 11],
    PH: [1, 3, 5, 7, 9, 11, 13]
  },

  //各监测因子数据分级（标准）对应颜色
  _legend_c: {
    NO: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    NO2: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    CO: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    H2S: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    SO2: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    O3: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    PM25: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    PM10: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    VOC: [
      [0, 0.89, 0, 0.75],
      [0, 0.7, 0, 0.75],
      [0.8, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.4, 0, 0.3, 0.75],
      [0.6, 0, 0.3, 0.75]
    ],
    TMP: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    spC: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    tur: [
      [0, 0.89, 0, 0.75],
      [1, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.6, 0, 0.3, 0.75],
      [0.49, 0, 0.14, 0.75]
    ],
    DO: [
      [0.49, 0, 0.14, 0.75],
      [0.6, 0, 0.3, 0.75],
      [1, 0, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 1, 0, 0.75],
      [0, 0.89, 0, 0.75]
    ],
    PH: [
      [0, 0.89, 0, 0.75],
      [0, 0.7, 0, 0.75],
      [0.8, 1, 0, 0.75],
      [1, 0.49, 0, 0.75],
      [1, 0, 0, 0.75],
      [0.4, 0, 0.3, 0.75],
      [0.6, 0, 0.3, 0.75]
    ]
  },

  _custom: [
    [0.05, 0.9, 0.03, 0.75],
    [0.3, 0.65, 0.02, 0.75],
    [0.87, 0.92, 0.03, 0.75],
    [0.8, 0.67, 0.04, 0.75],
    [0.92, 0.28, 0.07, 0.75],
    [0.6, 0.05, 0.05, 0.75]
  ],

  getStandardRange: function (name) {
    var range = this._legend_r[name];
    if (range == undefined) {
      range = this._legend_r['PM25'];
    }
    var min = range[0];
    var max = range[range.length - 1];
    // for (const key in range) {
    //   if (min == undefined) {
    //     min = parseInt(key)
    //   }
    //   max = parseInt(key)
    // }
    if (name == 'CO') {
      min *= 1000;
      max *= 1000;
    }

    return [min, max];
  },

  getColor: function (name, type, data, min, max) {
    if (!data) {
      return [0, 0, 0, 0];
    }
    if (type == this.S_TYPE) {
      return this.getStandardColor(name, data);
    } else {
      return this.getCustomColor(data, min, max);
    }
  },

  /**
   * 获取当前颜色上一个等级的颜色
   * @param {*} name
   * @param {*} type
   * @param {*} color
   */
  getPreviousColor(name, type, color) {
    let colors;
    if (type == this.S_TYPE) {
      colors = this._legend_c[name];
    } else {
      colors = this._custom;
    }
    if (colors == undefined) {
      colors = this._legend_c['PM25'];
    }
    let index = colors.indexOf(color);
    index--;
    if (index < 0) index = 0;
    return colors[index];
  },

  /**
   * 获取监测因子当前浓度对应的颜色
   * @param name 监测因子名称
   * @param data 监测因子浓度
   */
  getStandardColor: function (name, data) {
    let range = this._legend_r[name];
    let colors = this._legend_c[name];
    if (range == undefined) {
      range = this._legend_r['PM25'];
      colors = this._legend_c['PM25'];
    }
    // return colors[0]

    let selected = undefined;
    for (let i = 0; i < range.length; i++) {
      const d = range[i];
      let d1 = d;
      if (name == 'CO') {
        d1 *= 1000;
      }
      if (data >= d1) {
        selected = i;
      } else {
        break;
      }
    }

    // 避免下标越界
    if (selected >= colors.length) {
      selected = colors.length - 1;
    }

    // console.log(name + ': ' + selected);
    return colors[selected];
  },

  getStandardColorAndNext: function (name, data) {
    if (!data) {
      return {
        color: [0, 0, 0, 0],
        nextColor: [0, 0, 0, 0],
        range: 0,
        nextRange: 0
      };
    }
    let range = this._legend_r[name];
    let colors = this._legend_c[name];
    if (range == undefined) {
      range = this._legend_r['PM25'];
      colors = this._legend_c['PM25'];
    }

    let selected = undefined;
    for (let i = 0; i < range.length; i++) {
      const d = range[i];
      let d1 = d;
      if (name == 'CO') {
        d1 *= 1000;
      }
      if (data >= d1) {
        selected = i;
      } else {
        break;
      }
    }

    // 避免下标越界
    if (selected >= colors.length) {
      selected = colors.length - 1;
    }

    let nextIndex = selected + 1;
    if (nextIndex >= colors.length) {
      nextIndex = colors.length - 1;
    }

    return {
      color: colors[selected],
      nextColor: colors[nextIndex],
      range: range[selected],
      nextRange: range[nextIndex]
    };
  },

  getCustomColor: function (data, min, max) {
    var per = (max - min) / this._custom.length;
    var i = parseInt(data / per);
    if (i >= this._custom.length) {
      i = this._custom.length - 1;
    }
    return this._custom[i];
  }
};

export { Legend };