'use strict';

////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2015-2016 ArangoDB GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
///     http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Alan Plum
////////////////////////////////////////////////////////////////////////////////

const ALL_METHODS = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'PATCH', 'POST', 'PUT'];
const SwaggerContext = require('@arangodb/foxx/router/swagger-context');
const Route = require('@arangodb/foxx/router/route');
const Middleware = require('@arangodb/foxx/router/middleware');
const tokenize = require('@arangodb/foxx/router/tokenize');

const Router = module.exports = class Router extends SwaggerContext {
  constructor() {
    super();
    this._routes = [];
    this._middleware = [];
    this._namedRoutes = new Map();
  }

  use(path, fn, name) {
    if (typeof path !== 'string') {
      fn = path;
      path = '/*';
    }
    if (fn instanceof Router) {
      if (path.charAt(path.length - 1) !== '*') {
        if (path.charAt(path.length - 1) !== '/') {
          path += '/';
        }
        path += '*';
      }
      {
        const n = path.length - 1;
        if (path.charAt(n) === '/') {
          path = path.slice(0, n);
        }
        if (path.charAt(0) !== '/') {
          path = `/${path}`;
        }
      }
      const child = {
        path: path,
        _pathParams: new Map(),
        _pathParamNames: [],
        router: fn
      };
      child._pathTokens = tokenize(path, child);
      this._routes.push(child);
      if (name) {
        child.name = name;
        this._namedRoutes.set(child.name, child);
      }
      return fn;
    }
    const middleware = new Middleware(path, fn);
    this._middleware.push(middleware);
    return middleware;
  }

  all(path, handler, name) {
    const route = new Route(ALL_METHODS, path, handler, name);
    this._routes.push(route);
    if (route.name) {
      this._namedRoutes.set(route.name, route);
    }
    return route;
  }
};


ALL_METHODS.forEach(function (method) {
  Router.prototype[method.toLowerCase()] = function (path, handler, name) {
    const route = new Route([method], path, handler, name);
    this._routes.push(route);
    if (route.name) {
      this._namedRoutes.set(route.name, route);
    }
    return route;
  };
});