# coding: utf-8
import time

from synergine2.simulation import Event
from synergine2.terminals import Terminal
from synergine2.terminals import TerminalPackage
from synergine2.terminals import TerminalManager
from tests import BaseTest


class ValueTerminalPackage(TerminalPackage):
    def __init__(self, value, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.value = value


class MultiplyTerminal(Terminal):
    def receive(self, package: ValueTerminalPackage):
        self.send(ValueTerminalPackage(value=package.value * 2))
        self.send(ValueTerminalPackage(value=package.value * 4))


class DivideTerminal(Terminal):
    def receive(self, package: ValueTerminalPackage):
        self.send(ValueTerminalPackage(value=package.value / 2))
        self.send(ValueTerminalPackage(value=package.value / 4))


class AnEvent(Event):
    pass


class AnOtherEvent(Event):
    pass


class SendBackTerminal(Terminal):
    def receive(self, package: ValueTerminalPackage):
        self.send(package)


class TestTerminals(BaseTest):
    def test_terminal_communications(self):
        terminals_manager = TerminalManager(
            terminals=[
                MultiplyTerminal(),
            ]
        )
        terminals_manager.start()
        terminals_manager.send(ValueTerminalPackage(value=42))

        # We wait max 2s (see time.sleep) to consider
        # process have finished. If not, it will fail
        packages = []
        for i in range(200):
            packages.extend(terminals_manager.receive())
            if len(packages) == 2:
                break
            time.sleep(0.01)

        assert 2 == len(packages)
        values = [p.value for p in packages]
        assert 84 in values
        assert 168 in values

        terminals_manager.stop()  # pytest must execute this if have fail

    def test_terminals_communications(self):
        terminals_manager = TerminalManager(
            terminals=[
                MultiplyTerminal(),
                DivideTerminal(),
            ]
        )
        terminals_manager.start()
        terminals_manager.send(ValueTerminalPackage(value=42))

        # We wait max 2s (see time.sleep) to consider
        # process have finished. If not, it will fail
        packages = []
        for i in range(200):
            packages.extend(terminals_manager.receive())
            if len(packages) == 4:
                break
            time.sleep(0.01)

        assert 4 == len(packages)
        values = [p.value for p in packages]
        assert 84 in values
        assert 168 in values
        assert 21 in values
        assert 10.5 in values

        terminals_manager.stop()  # TODO pytest must execute this if have fail

    def test_event_listen_everything(self):
        class ListenEverythingTerminal(SendBackTerminal):
            pass

        terminals_manager = TerminalManager(
            terminals=[ListenEverythingTerminal()]
        )
        terminals_manager.start()
        terminals_manager.send(ValueTerminalPackage(value=42))
        an_event = AnEvent(84)
        terminals_manager.send(TerminalPackage(events=[an_event]))

        # We wait max 2s (see time.sleep) to consider
        # process have finished. If not, it will fail
        packages = []
        for i in range(200):
            packages.extend(terminals_manager.receive())
            if len(packages) == 2:
                break
            time.sleep(0.01)

        assert 2 == len(packages)
        assert 42 == packages[0].value
        assert AnEvent == type(packages[1].events[0])

        terminals_manager.stop()  # TODO pytest must execute this if have fail

    def test_event_listen_specified(self):
        class ListenAnEventTerminal(SendBackTerminal):
            subscribed_events = [AnOtherEvent]

        terminals_manager = TerminalManager(
            terminals=[ListenAnEventTerminal()]
        )
        terminals_manager.start()
        terminals_manager.send(ValueTerminalPackage(value=42))
        an_event = AnEvent(84)
        an_other_event = AnOtherEvent(168)
        terminals_manager.send(TerminalPackage(events=[an_event, an_other_event]))

        # We wait max 2s (see time.sleep) to consider
        # process have finished. If not, it will fail
        packages = []
        for i in range(200):
            packages.extend(terminals_manager.receive())
            if len(packages) == 1:
                break
            time.sleep(0.01)

        assert 2 == len(packages)
        assert AnOtherEvent == type(packages[1].events[0])

        terminals_manager.stop()  # TODO pytest must execute this if have fail