# -*- coding: utf-8 -*-
#
import os
import os.path
import threading
import websocket as ws
import ssl
import unittest

"""
test_app.py
websocket - WebSocket client library for Python

Copyright 2023 engn33r

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""

# Skip test to access the internet unless TEST_WITH_INTERNET == 1
TEST_WITH_INTERNET = os.environ.get('TEST_WITH_INTERNET', '0') == '1'
# Skip tests relying on local websockets server unless LOCAL_WS_SERVER_PORT != -1
LOCAL_WS_SERVER_PORT = os.environ.get('LOCAL_WS_SERVER_PORT', '-1')
TEST_WITH_LOCAL_SERVER = LOCAL_WS_SERVER_PORT != '-1'
TRACEABLE = True


class WebSocketAppTest(unittest.TestCase):

    class NotSetYet:
        """ A marker class for signalling that a value hasn't been set yet.
        """

    def setUp(self):
        ws.enableTrace(TRACEABLE)

        WebSocketAppTest.keep_running_open = WebSocketAppTest.NotSetYet()
        WebSocketAppTest.keep_running_close = WebSocketAppTest.NotSetYet()
        WebSocketAppTest.get_mask_key_id = WebSocketAppTest.NotSetYet()
        WebSocketAppTest.on_error_data = WebSocketAppTest.NotSetYet()

    def tearDown(self):
        WebSocketAppTest.keep_running_open = WebSocketAppTest.NotSetYet()
        WebSocketAppTest.keep_running_close = WebSocketAppTest.NotSetYet()
        WebSocketAppTest.get_mask_key_id = WebSocketAppTest.NotSetYet()
        WebSocketAppTest.on_error_data = WebSocketAppTest.NotSetYet()

    @unittest.skipUnless(TEST_WITH_LOCAL_SERVER, "Tests using local websocket server are disabled")
    def testKeepRunning(self):
        """ A WebSocketApp should keep running as long as its self.keep_running
        is not False (in the boolean context).
        """

        def on_open(self, *args, **kwargs):
            """ Set the keep_running flag for later inspection and immediately
            close the connection.
            """
            self.send("hello!")
            WebSocketAppTest.keep_running_open = self.keep_running
            self.keep_running = False

        def on_message(wsapp, message):
            print(message)
            self.close()

        def on_close(self, *args, **kwargs):
            """ Set the keep_running flag for the test to use.
            """
            WebSocketAppTest.keep_running_close = self.keep_running

        app = ws.WebSocketApp('ws://127.0.0.1:' + LOCAL_WS_SERVER_PORT, on_open=on_open, on_close=on_close, on_message=on_message)
        app.run_forever()

#    @unittest.skipUnless(TEST_WITH_LOCAL_SERVER, "Tests using local websocket server are disabled")
    @unittest.skipUnless(False, "Test disabled for now (requires rel)")
    def testRunForeverDispatcher(self):
        """ A WebSocketApp should keep running as long as its self.keep_running
        is not False (in the boolean context).
        """

        def on_open(self, *args, **kwargs):
            """ Send a message, receive, and send one more
            """
            self.send("hello!")
            self.recv()
            self.send("goodbye!")

        def on_message(wsapp, message):
            print(message)
            self.close()

        app = ws.WebSocketApp('ws://127.0.0.1:' + LOCAL_WS_SERVER_PORT, on_open=on_open, on_message=on_message)
        app.run_forever(dispatcher="Dispatcher")  # doesn't work
#        app.run_forever(dispatcher=rel)          # would work
#        rel.dispatch()

    @unittest.skipUnless(TEST_WITH_LOCAL_SERVER, "Tests using local websocket server are disabled")
    def testRunForeverTeardownCleanExit(self):
        """ The WebSocketApp.run_forever() method should return `False` when the application ends gracefully.
        """
        app = ws.WebSocketApp('ws://127.0.0.1:' + LOCAL_WS_SERVER_PORT)
        threading.Timer(interval=0.2, function=app.close).start()
        teardown = app.run_forever()
        self.assertEqual(teardown, False)

    @unittest.skipUnless(TEST_WITH_LOCAL_SERVER, "Tests using local websocket server are disabled")
    def testRunForeverTeardownExceptionalExit(self):
        """ The WebSocketApp.run_forever() method should return `True` when the application ends with an exception.
        It should also invoke the `on_error` callback before exiting.
        """

        def break_it():
            # Deliberately break the WebSocketApp by closing the inner socket.
            app.sock.close()

        def on_error(_, err):
            WebSocketAppTest.on_error_data = str(err)

        app = ws.WebSocketApp('ws://127.0.0.1:' + LOCAL_WS_SERVER_PORT, on_error=on_error)
        threading.Timer(interval=0.2, function=break_it).start()
        teardown = app.run_forever(ping_timeout=0.1)
        self.assertEqual(teardown, True)
        self.assertTrue(len(WebSocketAppTest.on_error_data) > 0)

    @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    def testSockMaskKey(self):
        """ A WebSocketApp should forward the received mask_key function down
        to the actual socket.
        """

        def my_mask_key_func():
            return "\x00\x00\x00\x00"

        app = ws.WebSocketApp('wss://api-pub.bitfinex.com/ws/1', get_mask_key=my_mask_key_func)

        # if numpy is installed, this assertion fail
        # Note: We can't use 'is' for comparing the functions directly, need to use 'id'.
        self.assertEqual(id(app.get_mask_key), id(my_mask_key_func))

    @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    def testInvalidPingIntervalPingTimeout(self):
        """ Test exception handling if ping_interval < ping_timeout
        """

        def on_ping(app, msg):
            print("Got a ping!")
            app.close()

        def on_pong(app, msg):
            print("Got a pong! No need to respond")
            app.close()

        app = ws.WebSocketApp('wss://api-pub.bitfinex.com/ws/1', on_ping=on_ping, on_pong=on_pong)
        self.assertRaises(ws.WebSocketException, app.run_forever, ping_interval=1, ping_timeout=2, sslopt={"cert_reqs": ssl.CERT_NONE})

    @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    def testPingInterval(self):
        """ Test WebSocketApp proper ping functionality
        """

        def on_ping(app, msg):
            print("Got a ping!")
            app.close()

        def on_pong(app, msg):
            print("Got a pong! No need to respond")
            app.close()

        app = ws.WebSocketApp('wss://api-pub.bitfinex.com/ws/1', on_ping=on_ping, on_pong=on_pong)
        app.run_forever(ping_interval=2, ping_timeout=1, sslopt={"cert_reqs": ssl.CERT_NONE})

    @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    def testOpcodeClose(self):
        """ Test WebSocketApp close opcode
        """

        app = ws.WebSocketApp('wss://tsock.us1.twilio.com/v3/wsconnect')
        app.run_forever(ping_interval=2, ping_timeout=1, ping_payload="Ping payload")

    # This is commented out because the URL no longer responds in the expected way
    # @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    # def testOpcodeBinary(self):
    #     """ Test WebSocketApp binary opcode
    #     """
    #     app = ws.WebSocketApp('wss://streaming.vn.teslamotors.com/streaming/')
    #     app.run_forever(ping_interval=2, ping_timeout=1, ping_payload="Ping payload")

    @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    def testBadPingInterval(self):
        """ A WebSocketApp handling of negative ping_interval
        """
        app = ws.WebSocketApp('wss://api-pub.bitfinex.com/ws/1')
        self.assertRaises(ws.WebSocketException, app.run_forever, ping_interval=-5, sslopt={"cert_reqs": ssl.CERT_NONE})

    @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    def testBadPingTimeout(self):
        """ A WebSocketApp handling of negative ping_timeout
        """
        app = ws.WebSocketApp('wss://api-pub.bitfinex.com/ws/1')
        self.assertRaises(ws.WebSocketException, app.run_forever, ping_timeout=-3, sslopt={"cert_reqs": ssl.CERT_NONE})

    @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    def testCloseStatusCode(self):
        """ Test extraction of close frame status code and close reason in WebSocketApp
        """
        def on_close(wsapp, close_status_code, close_msg):
            print("on_close reached")

        app = ws.WebSocketApp('wss://tsock.us1.twilio.com/v3/wsconnect', on_close=on_close)
        closeframe = ws.ABNF(opcode=ws.ABNF.OPCODE_CLOSE, data=b'\x03\xe8no-init-from-client')
        self.assertEqual([1000, 'no-init-from-client'], app._get_close_args(closeframe))

        closeframe = ws.ABNF(opcode=ws.ABNF.OPCODE_CLOSE, data=b'')
        self.assertEqual([None, None], app._get_close_args(closeframe))

        app2 = ws.WebSocketApp('wss://tsock.us1.twilio.com/v3/wsconnect')
        closeframe = ws.ABNF(opcode=ws.ABNF.OPCODE_CLOSE, data=b'')
        self.assertEqual([None, None], app2._get_close_args(closeframe))

        self.assertRaises(ws.WebSocketConnectionClosedException, app.send, data="test if connection is closed")

    @unittest.skipUnless(TEST_WITH_LOCAL_SERVER, "Tests using local websocket server are disabled")
    def testCallbackFunctionException(self):
        """ Test callback function exception handling """

        exc = None
        passed_app = None

        def on_open(app):
            raise RuntimeError("Callback failed")

        def on_error(app, err):
            nonlocal passed_app
            passed_app = app
            nonlocal exc
            exc = err

        def on_pong(app, msg):
            app.close()

        app = ws.WebSocketApp('ws://127.0.0.1:' + LOCAL_WS_SERVER_PORT, on_open=on_open, on_error=on_error, on_pong=on_pong)
        app.run_forever(ping_interval=2, ping_timeout=1)

        self.assertEqual(passed_app, app)
        self.assertIsInstance(exc, RuntimeError)
        self.assertEqual(str(exc), "Callback failed")

    @unittest.skipUnless(TEST_WITH_LOCAL_SERVER, "Tests using local websocket server are disabled")
    def testCallbackMethodException(self):
        """ Test callback method exception handling """

        class Callbacks:
            def __init__(self):
                self.exc = None
                self.passed_app = None
                self.app = ws.WebSocketApp(
                    'ws://127.0.0.1:' + LOCAL_WS_SERVER_PORT,
                    on_open=self.on_open,
                    on_error=self.on_error,
                    on_pong=self.on_pong
                )
                self.app.run_forever(ping_interval=2, ping_timeout=1)

            def on_open(self, app):
                raise RuntimeError("Callback failed")

            def on_error(self, app, err):
                self.passed_app = app
                self.exc = err

            def on_pong(self, app, msg):
                app.close()

        callbacks = Callbacks()

        self.assertEqual(callbacks.passed_app, callbacks.app)
        self.assertIsInstance(callbacks.exc, RuntimeError)
        self.assertEqual(str(callbacks.exc), "Callback failed")

    @unittest.skipUnless(TEST_WITH_LOCAL_SERVER, "Tests using local websocket server are disabled")
    def testReconnect(self):
        """ Test reconnect """
        pong_count = 0
        exc = None

        def on_error(app, err):
            nonlocal exc
            exc = err

        def on_pong(app, msg):
            nonlocal pong_count
            pong_count += 1
            if pong_count == 1:
                # First pong, shutdown socket, enforce read error
                app.sock.shutdown()
            if pong_count >= 2:
                # Got second pong after reconnect
                app.close()

        app = ws.WebSocketApp('ws://127.0.0.1:' + LOCAL_WS_SERVER_PORT, on_pong=on_pong, on_error=on_error)
        app.run_forever(ping_interval=2, ping_timeout=1, reconnect=3)

        self.assertEqual(pong_count, 2)
        self.assertIsInstance(exc, ws.WebSocketTimeoutException)
        self.assertEqual(str(exc), "ping/pong timed out")


if __name__ == "__main__":
    unittest.main()