/**
 * @file
 * @copyright  2013 Michael Aufreiter (Development Seed) and 2016 Yahoo Inc.
 * @license    Licensed under {@link https://spdx.org/licenses/BSD-3-Clause-Clear.html BSD-3-Clause-Clear}.
 *             Github.js is freely distributable.
 */

import Requestable from './Requestable';
import debug from 'debug';
const log = debug('github:search');

/**
 * Wrap the Search API
 */
class Search extends Requestable {
   /**
    * Create a Search
    * @param {Object} defaults - defaults for the search
    * @param {Requestable.auth} [auth] - information required to authenticate to Github
    * @param {string} [apiBase=https://api.github.com] - the base Github API URL
    */
   constructor(defaults, auth, apiBase) {
      super(auth, apiBase);
      this.__defaults = this._getOptionsWithDefaults(defaults);
   }

   /**
    * Available search options
    * @see https://developer.github.com/v3/search/#parameters
    * @typedef {Object} Search.Params
    * @param {string} q - the query to make
    * @param {string} sort - the sort field, one of `stars`, `forks`, or `updated`.
    *                      Default is [best match](https://developer.github.com/v3/search/#ranking-search-results)
    * @param {string} order - the ordering, either `asc` or `desc`
    */
   /**
    * Perform a search on the GitHub API
    * @private
    * @param {string} path - the scope of the search
    * @param {Search.Params} [withOptions] - additional parameters for the search
    * @param {Requestable.callback} [cb] - will receive the results of the search
    * @return {Promise} - the promise for the http request
    */
   _search(path, withOptions = {}, cb = undefined) {
      let requestOptions = {};
      Object.keys(this.__defaults).forEach((prop) => {
         requestOptions[prop] = this.__defaults[prop];
      });
      Object.keys(withOptions).forEach((prop) => {
         requestOptions[prop] = withOptions[prop];
      });

      log(`searching ${path} with options:`, requestOptions);
      return this._requestAllPages(`/search/${path}`, requestOptions, cb);
   }

   /**
    * Search for repositories
    * @see https://developer.github.com/v3/search/#search-repositories
    * @param {Search.Params} [options] - additional parameters for the search
    * @param {Requestable.callback} [cb] - will receive the results of the search
    * @return {Promise} - the promise for the http request
    */
   forRepositories(options, cb) {
      return this._search('repositories', options, cb);
   }

   /**
    * Search for code
    * @see https://developer.github.com/v3/search/#search-code
    * @param {Search.Params} [options] - additional parameters for the search
    * @param {Requestable.callback} [cb] - will receive the results of the search
    * @return {Promise} - the promise for the http request
    */
   forCode(options, cb) {
      return this._search('code', options, cb);
   }

   /**
    * Search for issues
    * @see https://developer.github.com/v3/search/#search-issues
    * @param {Search.Params} [options] - additional parameters for the search
    * @param {Requestable.callback} [cb] - will receive the results of the search
    * @return {Promise} - the promise for the http request
    */
   forIssues(options, cb) {
      return this._search('issues', options, cb);
   }

   /**
    * Search for users
    * @see https://developer.github.com/v3/search/#search-users
    * @param {Search.Params} [options] - additional parameters for the search
    * @param {Requestable.callback} [cb] - will receive the results of the search
    * @return {Promise} - the promise for the http request
    */
   forUsers(options, cb) {
      return this._search('users', options, cb);
   }
}

module.exports = Search;