from queue import Empty
import unittest
import multiprocessing
import time
import os
import json

from player import Player
from helpers.logging_manager import LoggingManager
# How long to wait (by default) in secs for the player to respond.
TIMEOUT_MSG_MAX_S = 10
TIMEOUT_QUIT_S = 10

test_dir = dir_path = os.path.dirname(os.path.realpath(__file__)) + "/"
resource_dir = test_dir + "resources/"
class TestPlayer(unittest.TestCase):

    player: multiprocessing.Process
    player_from_q: multiprocessing.Queue
    player_to_q: multiprocessing.Queue
    logger: LoggingManager


    # initialization logic for the test suite declared in the test module
    # code that is executed before all tests in one test run
    @classmethod
    def setUpClass(cls):
        cls.logger = LoggingManager("Test_Player")

    # clean up logic for the test suite declared in the test module
    # code that is executed after all tests in one test run
    @classmethod
    def tearDownClass(cls):
        pass

    # initialization logic
    # code that is executed before each test
    def setUp(self):
        self.player_from_q = multiprocessing.Queue()
        self.player_to_q = multiprocessing.Queue()
        self.player = multiprocessing.Process(target=Player, args=(-1, self.player_to_q, self.player_from_q))
        self.player.start()
        self._send_msg_wait_OKAY("CLEAR") # Empty any previous track items.

    # clean up logic
    # code that is executed after each test
    def tearDown(self):
        # Try to kill it, waits the timeout.
        if self._send_msg_and_wait("QUIT"):
            self.player.join(timeout=TIMEOUT_QUIT_S)
            self.logger.log.info("Player quit successfully.")
        else:
            self.logger.log.error("No response on teardown, terminating player.")
            # It's brain dead :/
            self.player.terminate()

    def _send_msg(self, msg: str):
        self.player_to_q.put("TEST:{}".format(msg))

    def _wait_for_msg(self, msg: str, sources_filter=["TEST"], timeout:int = TIMEOUT_MSG_MAX_S):
        elapsed = 0
        got_anything = False
        while elapsed < timeout:
            try:
                response: str = self.player_from_q.get_nowait()
                if response:
                    self.logger.log.info("Received response: {}\nWas looking for {}:{}".format(response, sources_filter, msg))
                    got_anything = True
                    source = response[:response.index(":")]
                    if source in sources_filter:
                        return response[len(source+":"+msg)+1:] # +1 to remove trailing : on source.
            except Empty:
                pass
            finally:
                time.sleep(0.1)
                elapsed += 0.1
        return False if got_anything else None

    def _send_msg_and_wait(self, msg:str, sources_filter=["TEST"], timeout: int = TIMEOUT_MSG_MAX_S):
        self._send_msg(msg)
        return self._wait_for_msg(msg, sources_filter, timeout)

    def _send_msg_wait_OKAY(self, msg:str, sources_filter=["TEST"], timeout: int = TIMEOUT_MSG_MAX_S):
        response = self._send_msg_and_wait(msg, sources_filter, timeout)

        self.assertTrue(response)

        self.assertTrue(isinstance(response, str))

        response = response.split(":", 1)

        self.assertEqual(response[0], "OKAY")

        if len(response) > 1:
            return response[1]
        return None


    def test_player_running(self):
        response = self._send_msg_wait_OKAY("STATUS")

        self.assertTrue(response)

        json_obj = json.loads(response)

        self.assertTrue(json_obj["initialised"])

    def test_player_play(self):
        item = {
            "timeslotitemid": "0",
            "managedid": "1",
            "filename": resource_dir + "2sec.mp3",
            "weight": "0",
            "title": "5sec",
            "length": "00:00:02"
        }

        response = self._send_msg_wait_OKAY("ADD:"+ json.dumps(item))
        # Should return nothing, just OKAY.
        self.assertFalse(response)

        # Check we can load the file
        response = self._send_msg_wait_OKAY("LOAD:0")
        self.assertFalse(response)

        # Check we can play the file
        response = self._send_msg_wait_OKAY("PLAY")
        self.assertFalse(response)

        time.sleep(1)

        response = self._send_msg_wait_OKAY("STATUS")

        self.assertTrue(response)

        json_obj = json.loads(response)

        self.assertTrue(json_obj["playing"])

        # Check the file stops playing.
        # TODO: Make sure replay / play on load not enabled.
        time.sleep(2)

        response = self._send_msg_wait_OKAY("STATUS")

        self.assertTrue(response)

        json_obj = json.loads(response)

        self.assertFalse(json_obj["playing"])






# runs the unit tests in the module
if __name__ == '__main__':
    try:
        unittest.main()
    except Exception as e:
        print("Tests failed :/", e)
    else:
        print("Tests passed!")