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@license
Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
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-->
<link rel="import" href="../../polymer/polymer.html">
<link rel="import" href="../../iron-input/iron-input.html">
<link rel="import" href="ssn-validator.html">

<dom-module id="ssn-input">
  <template>

    <style>
      :host {
        display: inline-block;
      }

      input[is="iron-input"] {
        font: inherit;
        outline: none;
        box-shadow: none;
        border: none;
        width: auto;
        text-align: center;
      }
    </style>

    <ssn-validator></ssn-validator>

    <input is="iron-input" maxlength="3" bind-value="{{_ssn1}}" size="3" aria-label="First 3 digits of social security number">
    -
    <input is="iron-input" maxlength="2" bind-value="{{_ssn2}}" size="2" aria-label="Middle 2 digits of social security number">
    -
    <input is="iron-input" maxlength="4" bind-value="{{_ssn3}}" size="4" aria-label="Last 4 digits of social security number">

  </template>
</dom-module>

<script>
  Polymer({
    is: 'ssn-input',

    behaviors: [
      Polymer.IronValidatableBehavior
    ],

    properties: {
      value: {
        notify: true,
        type: String
      },

      _ssn1: {
        type: String
      },

      _ssn2: {
        type: String
      },

      _ssn3: {
        type: String
      },

      validator: {
        type: String,
        value: 'ssn-validator'
      }
    },

    observers: [
      '_computeValue(_ssn1,_ssn2,_ssn3)'
    ],

    _computeValue: function(ssn1, ssn2, ssn3) {
      this.value = ssn1.trim() + '-' + ssn2.trim() + '-' + ssn3.trim();
    }
  });
</script>