#!/usr/bin/python3
#
import basic_protocols
import logging
import enum
import time
import socket
#
class ClientProtocol(basic_protocols.Protocol):
	def __init__(self, socket, total_bytes, wait_until=None, send_buffer_len=None, use_acceleration=None):
		self.socket = socket
		self.total_bytes = total_bytes
		self.wait_until = wait_until
		self.send_buffer_len = send_buffer_len
		self.use_acceleration = use_acceleration
		#
		self.states = enum.Enum('CLIENT_CONN_STATES', 'READY_TO_BEGIN SEND_GROUP_ID PUSH_DATA DONE')
		self.state = self.states.READY_TO_BEGIN
		#
		self.sub_protocol = None
		self.group_id = int(self.wait_until*1000) if self.wait_until is not None else 0
		# a group id of 0 means no group
	#
	def _run_iteration(self, block=True):
		if self.state is self.states.READY_TO_BEGIN:
			group_id_bytes = self.group_id.to_bytes(8, byteorder='big', signed=False)
			self.sub_protocol = basic_protocols.SendDataProtocol(self.socket, group_id_bytes)
			self.state = self.states.SEND_GROUP_ID
		#
		if self.state is self.states.SEND_GROUP_ID:
			if block and self.wait_until is not None:
				time.sleep(self.wait_until-time.time())
			#
			if (self.wait_until is None or time.time() >= self.wait_until) and self.sub_protocol.run(block=block):
				self.sub_protocol = basic_protocols.PushDataProtocol(self.socket, self.total_bytes,
				                                                     send_buffer_len=self.send_buffer_len,
				                                                     use_acceleration=self.use_acceleration)
				self.state = self.states.PUSH_DATA
			#
		#
		if self.state is self.states.PUSH_DATA:
			if self.sub_protocol.run(block=block):
				self.state = self.states.DONE
				return True
			#
		#
		return False
	#
#
class ServerProtocol(basic_protocols.Protocol):
	def __init__(self, socket, conn_id, group_id_callback=None, bandwidth_callback=None, use_acceleration=None):
		self.socket = socket
		self.conn_id = conn_id
		self.group_id_callback = group_id_callback
		self.bandwidth_callback = bandwidth_callback
		self.use_acceleration = use_acceleration
		#
		self.states = enum.Enum('SERVER_CONN_STATES', 'READY_TO_BEGIN RECV_GROUP_ID PULL_DATA DONE')
		self.state = self.states.READY_TO_BEGIN
		#
		self.sub_protocol = None
	#
	def _run_iteration(self, block=True):
		if self.state is self.states.READY_TO_BEGIN:
			self.sub_protocol = basic_protocols.ReceiveDataProtocol(self.socket)
			self.state = self.states.RECV_GROUP_ID
		#
		if self.state is self.states.RECV_GROUP_ID:
			if self.sub_protocol.run(block=block):
				group_id = int.from_bytes(self.sub_protocol.received_data, byteorder='big', signed=False)
				if group_id == 0:
					# a group of 0 means no group
					group_id = None
				#
				self.group_id_callback(self.conn_id, group_id)
				self.sub_protocol = basic_protocols.PullDataProtocol(self.socket, use_acceleration=self.use_acceleration)
				self.state = self.states.PULL_DATA
			#
		#
		if self.state is self.states.PULL_DATA:
			if self.sub_protocol.run(block=block):
				self.state = self.states.DONE
				if self.bandwidth_callback:
					self.bandwidth_callback(self.conn_id, self.sub_protocol.data_size, self.sub_protocol.calc_transfer_rate())
				#
				return True
			#
		#
		return False
	#
#