/*
 * Copyright (C)2005-2019 Haxe Foundation
 *
 * 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.
 */

package sys.net;

/**
	A TCP socket class : allow you to both connect to a given server and exchange messages or start your own server and wait for connections.
**/
extern class Socket {
	/**
		The stream on which you can read available data. By default the stream is blocking until the requested data is available,
		use `setBlocking(false)` or `setTimeout` to prevent infinite waiting.
	**/
	var input(default, null):haxe.io.Input;

	/**
		The stream on which you can send data. Please note that in case the output buffer you will block while writing the data, use `setBlocking(false)` or `setTimeout` to prevent that.
	**/
	var output(default, null):haxe.io.Output;

	/**
		A custom value that can be associated with the socket. Can be used to retrieve your custom infos after a `select`.
	***/
	var custom:Dynamic;

	/**
		Creates a new unconnected socket.
	**/
	function new():Void;

	/**
		Closes the socket : make sure to properly close all your sockets or you will crash when you run out of file descriptors.
	**/
	function close():Void;

	/**
		Read the whole data available on the socket.

		*Note*: this is **not** meant to be used together with `setBlocking(false)`,
		as it will always throw `haxe.io.Error.Blocked`. `input` methods should be used directly instead.
	**/
	function read():String;

	/**
		Write the whole data to the socket output.

		*Note*: this is **not** meant to be used together with `setBlocking(false)`, as
		`haxe.io.Error.Blocked` may be thrown mid-write with no indication of how many bytes have been written.
		`output.writeBytes()` should be used instead as it returns this information.
	**/
	function write(content:String):Void;

	/**
		Connect to the given server host/port. Throw an exception in case we couldn't successfully connect.
	**/
	function connect(host:Host, port:Int):Void;

	/**
		Allow the socket to listen for incoming questions. The parameter tells how many pending connections we can have until they get refused. Use `accept()` to accept incoming connections.
	**/
	function listen(connections:Int):Void;

	/**
		Shutdown the socket, either for reading or writing.
	**/
	function shutdown(read:Bool, write:Bool):Void;

	/**
		Bind the socket to the given host/port so it can afterwards listen for connections there.
	**/
	function bind(host:Host, port:Int):Void;

	/**
		Accept a new connected client. This will return a connected socket on which you can read/write some data.
	**/
	function accept():Socket;

	/**
		Return the information about the other side of a connected socket.
	**/
	function peer():{host:Host, port:Int};

	/**
		Return the information about our side of a connected socket.
	**/
	function host():{host:Host, port:Int};

	/**
		Gives a timeout (in seconds) after which blocking socket operations (such as reading and writing) will abort and throw an exception.
	**/
	function setTimeout(timeout:Float):Void;

	/**
		Block until some data is available for read on the socket.
	**/
	function waitForRead():Void;

	/**
		Change the blocking mode of the socket. A blocking socket is the default behavior. A non-blocking socket will abort blocking operations immediately by throwing a haxe.io.Error.Blocked value.
	**/
	function setBlocking(b:Bool):Void;

	/**
		Allows the socket to immediately send the data when written to its output : this will cause less ping but might increase the number of packets / data size, especially when doing a lot of small writes.
	**/
	function setFastSend(b:Bool):Void;

	/**
		Wait until one of the sockets group is ready for the given operation:

		 - `read` contains sockets on which we want to wait for available data to be read,
		 - `write` contains sockets on which we want to wait until we are allowed to write some data to their output buffers,
		 - `others` contains sockets on which we want to wait for exceptional conditions.
		 - `select` will block until one of the condition is met, in which case it will return the sockets for which the condition was true.

		In case a `timeout` (in seconds) is specified, select might wait at worst until the timeout expires.
	**/
	static function select(read:Array<Socket>, write:Array<Socket>, others:Array<Socket>,
		?timeout:Float):{read:Array<Socket>, write:Array<Socket>, others:Array<Socket>};
}