(function() {
  var Declaration, Flex, flexSpec, list,
    extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
    hasProp = {}.hasOwnProperty;

  flexSpec = require('./flex-spec');

  Declaration = require('../declaration');

  list = require('postcss/lib/list');

  Flex = (function(superClass) {
    extend(Flex, superClass);

    function Flex() {
      return Flex.__super__.constructor.apply(this, arguments);
    }

    Flex.names = ['flex', 'box-flex'];

    Flex.oldValues = {
      'auto': '1',
      'none': '0'
    };

    Flex.prototype.prefixed = function(prop, prefix) {
      var ref, spec;
      ref = flexSpec(prefix), spec = ref[0], prefix = ref[1];
      if (spec === 2009) {
        return prefix + 'box-flex';
      } else {
        return Flex.__super__.prefixed.apply(this, arguments);
      }
    };

    Flex.prototype.normalize = function() {
      return 'flex';
    };

    Flex.prototype.set = function(decl, prefix) {
      var components, spec;
      spec = flexSpec(prefix)[0];
      if (spec === 2009) {
        decl.value = list.space(decl.value)[0];
        decl.value = Flex.oldValues[decl.value] || decl.value;
        return Flex.__super__.set.call(this, decl, prefix);
      } else if (spec === 2012) {
        components = list.space(decl.value);
        if (components.length === 3 && components[2] === '0') {
          decl.value = components.slice(0, 2).concat('0px').join(' ');
        }
        return Flex.__super__.set.call(this, decl, prefix);
      } else {
        return Flex.__super__.set.apply(this, arguments);
      }
    };

    return Flex;

  })(Declaration);

  module.exports = Flex;

}).call(this);