acuminous/yadda

/*jslint node: true */
'use strict';

var Interpreter = require('./Interpreter');
var Context = require('./Context');
var fn = require('./fn');

var Yadda = function (libraries, interpreter_context) {
  if (!(this instanceof Yadda)) {
    return new Yadda(libraries, interpreter_context);
  }

  this.interpreter = new Interpreter(libraries);

  this.requires = function (libraries) {
    this.interpreter.requires(libraries);
    return this;
  };

  this.yadda = function (scenario, scenario_context, next) {
    if (arguments.length === 0) return this;
    if (arguments.length === 2 && fn.is_function(scenario_context)) return this.yadda(scenario, {}, scenario_context);
    this.interpreter.validate(scenario);
    this.interpreter.interpret(scenario, new Context().merge(interpreter_context).merge(scenario_context), next);
  };

  // Not everyone shares my sense of humour re the recursive api :(
  // See https://github.com/acuminous/yadda/issues/111
  this.run = this.yadda;

  this.toString = function () {
    return 'Yadda 2.2.0 Copyright 2010 Stephen Cresswell';
  };
};

module.exports = Yadda;