acuminous/yadda

'use strict';

var Macro = require('./Macro');
var Dictionary = require('./Dictionary');
var $ = require('./Array');

// Understands how to index macros
var Library = function (dictionary) {
  // eslint-disable-next-line no-redeclare
  var dictionary = dictionary || new Dictionary();
  var macros = $();
  var _this = this;

  this.define = function (signatures, fn, macro_context, options) {
    $(signatures).each(function (signature) {
      define_macro(signature, fn, macro_context, options);
    });
    return this;
  };

  var define_macro = function (signature, fn, macro_context, options) {
    if (_this.get_macro(signature)) throw new Error('Duplicate macro: [' + signature + ']');
    macros.push(new Macro(signature, dictionary.expand(signature), fn, macro_context, _this, options));
  };

  this.get_macro = function (signature) {
    return macros.find(function (other_macro) {
      return other_macro.is_identified_by(signature);
    });
  };

  this.find_compatible_macros = function (step) {
    return macros.find_all(function (macro) {
      return macro.can_interpret(step);
    });
  };
};

module.exports = Library;