var RibicaValidationMixin = {
  _updateState: function(prop, value) {
    var newState = {};
    newState[prop] = value;
    this.setState(newState);
  },
  _validate: function(prop, value) {
    if(this.validations && this.validations[prop]) {
      var cb = function(err) {
        if (err !== undefined) {
          var errors = this.state.errors;
          if(err.length > 0) {
            errors[prop] = err;
          } else {
            delete errors[prop];
          }
          this.setState({errors: errors});
        }
      }.bind(this);

      var immediateErrors = this.validations[prop](value, cb);
      if(immediateErrors  !== undefined) {
        cb(immediateErrors);
      }
    }
  },
  handleChange: function(prop) {
    return function(event) {
      event.preventDefault();
      this._updateState(prop, event.target.value);
      this._validate(prop, event.target.value);
    }.bind(this);

  },
  getValidationMessages:function(prop) {
    return (this.state.errors[prop] || []);
  },
  validate: function() {
    for (var key in this.state) {
      if (this.state.hasOwnProperty(key)) {
        this._validate(key, this.state[key]);
      }
    }
    return this.isValid();
  },
  isValid: function() {
    return Object.keys(this.state.errors).length === 0;
  }
};

module.exports = RibicaValidationMixin;