'use strict';

var utils = require('../utils');

/**
 * Common properties that need to be initialized on the templates instance,
 * and/or other instances.
 */

module.exports = function(app) {
  app.cache = {};
  app.cache.data = {};
  app.cache.context = {};

  // prime `_`
  if (!app._) utils.define(app, '_', {});
  app._.helpers = {
    async: {},
    sync: {}
  };

  app.viewTypes = {
    layout: [],
    partial: [],
    renderable: []
  };

  app.define('templatesError', {
    compile: {
      callback: 'is sync and does not take a callback function',
      engine: 'cannot find an engine for: %s',
      method: 'expects engines to have a compile method'
    },
    render: {
      callback: 'is async and expects a callback function',
      engine: 'cannot find an engine for: %s',
      method: 'expects engines to have a render method'
    },
    layouts: {
      notfound: 'layout "%s" was defined on view "%s" but cannot be not found (common causes are incorrect glob patterns, renameKey function modifying the key, and typos in search pattern)',
      registered: 'layout "%s" was defined on view "%s" but no layouts are registered'
    }
  });
};