// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var util = require('util');
var EventEmitter = require('events').EventEmitter;


var incoming = require('_http_incoming');
var IncomingMessage = exports.IncomingMessage = incoming.IncomingMessage;


var common = require('_http_common');
exports.parsers = common.parsers;


var outgoing = require('_http_outgoing');
var OutgoingMessage = exports.OutgoingMessage = outgoing.OutgoingMessage;


var server = require('_http_server');
exports.ServerResponse = server.ServerResponse;
exports.STATUS_CODES = server.STATUS_CODES;


var agent = require('_http_agent');
var Agent = exports.Agent = agent.Agent;
var globalAgent = exports.globalAgent = agent.globalAgent;

var client = require('_http_client');
var ClientRequest = exports.ClientRequest = client.ClientRequest;

exports.request = function(options, cb) {
  return globalAgent.request(options, cb);
};

exports.get = function(options, cb) {
  return globalAgent.get(options, cb);
};

exports._connectionListener = server._connectionListener;
var Server = exports.Server = server.Server;

exports.createServer = function(requestListener) {
  return new Server(requestListener);
};


// Legacy Interface

function Client(port, host) {
  if (!(this instanceof Client)) return new Client(port, host);
  EventEmitter.call(this);

  host = host || 'localhost';
  port = port || 80;
  this.host = host;
  this.port = port;
  this.agent = new Agent({ host: host, port: port, maxSockets: 1 });
}
util.inherits(Client, EventEmitter);
Client.prototype.request = function(method, path, headers) {
  var self = this;
  var options = {};
  options.host = self.host;
  options.port = self.port;
  if (method[0] === '/') {
    headers = path;
    path = method;
    method = 'GET';
  }
  options.method = method;
  options.path = path;
  options.headers = headers;
  options.agent = self.agent;
  var c = new ClientRequest(options);
  c.on('error', function(e) {
    self.emit('error', e);
  });
  // The old Client interface emitted 'end' on socket end.
  // This doesn't map to how we want things to operate in the future
  // but it will get removed when we remove this legacy interface.
  c.on('socket', function(s) {
    s.on('end', function() {
      if (self._decoder) {
        var ret = self._decoder.end();
        if (ret)
          self.emit('data', ret);
      }
      self.emit('end');
    });
  });
  return c;
};

exports.Client = util.deprecate(Client,
    'http.Client will be removed soon. Do not use it.');

exports.createClient = util.deprecate(function(port, host) {
  return new Client(port, host);
}, 'http.createClient is deprecated. Use `http.request` instead.');