'use strict';

var _ = require('lodash');
var fs = require('fs');

var defineElement = function(fullName, baseClass, message) {
  return fullName + ' = function() {\n' +
         '  this.message = ' + message + ';\n' +
         '  this.stack = this.message + \'\\n\' + (new Error()).stack;\n' +
         '};\n' +
         fullName + '.prototype = Object.create(' + baseClass + '.prototype);\n' +
         fullName + '.prototype.name = "' + fullName + '";\n\n';
};

var traverseNode = function(baseClass, errorDefinition) {
  var className = baseClass + '.' + errorDefinition.name;
  var generated = defineElement(className, baseClass, errorDefinition.message);
  if (errorDefinition.errors) {
    generated += childDefinitions(className, errorDefinition.errors);
  }
  return generated;
};

/* jshint latedef: false */
var childDefinitions = function(parent, childDefinitions) {
  var generated = '';
  _.each(childDefinitions, function(childDefinition) {
    generated += traverseNode(parent, childDefinition);
  });
  return generated;
};
/* jshint latedef: true */

var traverseRoot = function(errorsDefinition) {
  var fullName = 'bitcore.Error';
  var path = 'Error';
  var generated = '\'use strict\';\n\nvar inherits = require(\'inherits\');\n\n';
  generated += '/* AUTOGENERATED FILE. DON\'T EDIT, MODIFY "lib/errors/spec.js" INSTEAD */\n\n';
  generated += 'var bitcore = {};\n\n';
  generated += defineElement(fullName, path, '\'Internal error\'');
  generated += childDefinitions(fullName, errorsDefinition);
  generated += 'module.exports = bitcore.Error;\n';
  return generated;
};

var data = require('./spec');
fs.writeFileSync(__dirname + '/index.js', traverseRoot(data));