/**

* Copyright (c) 2013-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/

'use strict';

/**

* Use invariant() to assert state which your program assumes to be true.
*
* Provide sprintf-style format (only %s is supported) and arguments
* to provide information about what broke and what you were
* expecting.
*
* The invariant message will be stripped in production, but the invariant
* will remain to ensure logic does not differ in production.
*/

var invariant = function(condition, format, a, b, c, d, e, f) {

if (process.env.NODE_ENV !== 'production') {
  if (format === undefined) {
    throw new Error('invariant requires an error message argument');
  }
}

if (!condition) {
  var error;
  if (format === undefined) {
    error = new Error(
      'Minified exception occurred; use the non-minified dev environment ' +
      'for the full error message and additional helpful warnings.'
    );
  } else {
    var args = [a, b, c, d, e, f];
    var argIndex = 0;
    error = new Error(
      format.replace(/%s/g, function() { return args[argIndex++]; })
    );
    error.name = 'Invariant Violation';
  }

  error.framesToPop = 1; // we don't care about invariant's own frame
  throw error;
}

};

module.exports = invariant;