# -*- coding: utf-8 -*-
#
import os
import os.path
import websocket as ws
from websocket._http import proxy_info, read_headers, _start_proxied_socket, _tunnel, _get_addrinfo_list, connect
import unittest
import ssl
import websocket
import socket

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

Copyright 2022 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.
"""

try:
    from python_socks._errors import ProxyError, ProxyTimeoutError, ProxyConnectionError
except:
    from websocket._http import ProxyError, ProxyTimeoutError, ProxyConnectionError

# Skip test to access the internet unless TEST_WITH_INTERNET == 1
TEST_WITH_INTERNET = os.environ.get('TEST_WITH_INTERNET', '0') == '1'
TEST_WITH_PROXY = os.environ.get('TEST_WITH_PROXY', '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'


class SockMock:
    def __init__(self):
        self.data = []
        self.sent = []

    def add_packet(self, data):
        self.data.append(data)

    def gettimeout(self):
        return None

    def recv(self, bufsize):
        if self.data:
            e = self.data.pop(0)
            if isinstance(e, Exception):
                raise e
            if len(e) > bufsize:
                self.data.insert(0, e[bufsize:])
            return e[:bufsize]

    def send(self, data):
        self.sent.append(data)
        return len(data)

    def close(self):
        pass


class HeaderSockMock(SockMock):

    def __init__(self, fname):
        SockMock.__init__(self)
        path = os.path.join(os.path.dirname(__file__), fname)
        with open(path, "rb") as f:
            self.add_packet(f.read())


class OptsList():

    def __init__(self):
        self.timeout = 1
        self.sockopt = []
        self.sslopt = {"cert_reqs": ssl.CERT_NONE}


class HttpTest(unittest.TestCase):

    def testReadHeader(self):
        status, header, status_message = read_headers(HeaderSockMock("data/header01.txt"))
        self.assertEqual(status, 101)
        self.assertEqual(header["connection"], "Upgrade")
        # header02.txt is intentionally malformed
        self.assertRaises(ws.WebSocketException, read_headers, HeaderSockMock("data/header02.txt"))

    def testTunnel(self):
        self.assertRaises(ws.WebSocketProxyException, _tunnel, HeaderSockMock("data/header01.txt"), "example.com", 80, ("username", "password"))
        self.assertRaises(ws.WebSocketProxyException, _tunnel, HeaderSockMock("data/header02.txt"), "example.com", 80, ("username", "password"))

    @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    def testConnect(self):
        # Not currently testing an actual proxy connection, so just check whether proxy errors are raised. This requires internet for a DNS lookup
        if ws._http.HAVE_PYTHON_SOCKS:
            # Need this check, otherwise case where python_socks is not installed triggers
            # websocket._exceptions.WebSocketException: Python Socks is needed for SOCKS proxying but is not available
            self.assertRaises((ProxyTimeoutError, OSError), _start_proxied_socket, "wss://example.com", OptsList(), proxy_info(http_proxy_host="example.com", http_proxy_port="8080", proxy_type="socks4", timeout=1))
            self.assertRaises((ProxyTimeoutError, OSError), _start_proxied_socket, "wss://example.com", OptsList(), proxy_info(http_proxy_host="example.com", http_proxy_port="8080", proxy_type="socks4a", timeout=1))
            self.assertRaises((ProxyTimeoutError, OSError), _start_proxied_socket, "wss://example.com", OptsList(), proxy_info(http_proxy_host="example.com", http_proxy_port="8080", proxy_type="socks5", timeout=1))
            self.assertRaises((ProxyTimeoutError, OSError), _start_proxied_socket, "wss://example.com", OptsList(), proxy_info(http_proxy_host="example.com", http_proxy_port="8080", proxy_type="socks5h", timeout=1))
            self.assertRaises(ProxyConnectionError, connect, "wss://example.com", OptsList(), proxy_info(http_proxy_host="127.0.0.1", http_proxy_port=9999, proxy_type="socks4", timeout=1), None)

        self.assertRaises(TypeError, _get_addrinfo_list, None, 80, True, proxy_info(http_proxy_host="127.0.0.1", http_proxy_port="9999", proxy_type="http"))
        self.assertRaises(TypeError, _get_addrinfo_list, None, 80, True, proxy_info(http_proxy_host="127.0.0.1", http_proxy_port="9999", proxy_type="http"))
        self.assertRaises(socket.timeout, connect, "wss://google.com", OptsList(), proxy_info(http_proxy_host="8.8.8.8", http_proxy_port=9999, proxy_type="http", timeout=1), None)
        self.assertEqual(
            connect("wss://google.com", OptsList(), proxy_info(http_proxy_host="8.8.8.8", http_proxy_port=8080, proxy_type="http"), True),
            (True, ("google.com", 443, "/")))
        # The following test fails on Mac OS with a gaierror, not an OverflowError
        # self.assertRaises(OverflowError, connect, "wss://example.com", OptsList(), proxy_info(http_proxy_host="127.0.0.1", http_proxy_port=99999, proxy_type="socks4", timeout=2), False)

    @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    @unittest.skipUnless(TEST_WITH_PROXY, "This test requires a HTTP proxy to be running on port 8899")
    @unittest.skipUnless(TEST_WITH_LOCAL_SERVER, "Tests using local websocket server are disabled")
    def testProxyConnect(self):
        ws = websocket.WebSocket()
        ws.connect("ws://127.0.0.1:" + LOCAL_WS_SERVER_PORT, http_proxy_host="127.0.0.1", http_proxy_port="8899", proxy_type="http")
        ws.send("Hello, Server")
        server_response = ws.recv()
        self.assertEqual(server_response, "Hello, Server")
        # self.assertEqual(_start_proxied_socket("wss://api.bitfinex.com/ws/2", OptsList(), proxy_info(http_proxy_host="127.0.0.1", http_proxy_port="8899", proxy_type="http"))[1], ("api.bitfinex.com", 443, '/ws/2'))
        self.assertEqual(_get_addrinfo_list("api.bitfinex.com", 443, True, proxy_info(http_proxy_host="127.0.0.1", http_proxy_port="8899", proxy_type="http")),
                         (socket.getaddrinfo("127.0.0.1", 8899, 0, socket.SOCK_STREAM, socket.SOL_TCP), True, None))
        self.assertEqual(connect("wss://api.bitfinex.com/ws/2", OptsList(), proxy_info(http_proxy_host="127.0.0.1", http_proxy_port=8899, proxy_type="http"), None)[1], ("api.bitfinex.com", 443, '/ws/2'))
        # TODO: Test SOCKS4 and SOCK5 proxies with unit tests

    @unittest.skipUnless(TEST_WITH_INTERNET, "Internet-requiring tests are disabled")
    def testSSLopt(self):
        ssloptions = {
            "check_hostname": False,
            "server_hostname": "ServerName",
            "ssl_version": ssl.PROTOCOL_TLS_CLIENT,
            "ciphers": "TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:\
                        TLS_AES_128_GCM_SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:\
                        ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:\
                        ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:\
                        DHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:\
                        ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES128-GCM-SHA256:\
                        ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:\
                        DHE-RSA-AES256-SHA256:ECDHE-ECDSA-AES128-SHA256:\
                        ECDHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA256:\
                        ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA",
            "ecdh_curve": "prime256v1"
        }
        ws_ssl1 = websocket.WebSocket(sslopt=ssloptions)
        ws_ssl1.connect("wss://api.bitfinex.com/ws/2")
        ws_ssl1.send("Hello")
        ws_ssl1.close()

        ws_ssl2 = websocket.WebSocket(sslopt={"check_hostname": True})
        ws_ssl2.connect("wss://api.bitfinex.com/ws/2")
        ws_ssl2.close

    def testProxyInfo(self):
        self.assertEqual(proxy_info(http_proxy_host="127.0.0.1", http_proxy_port="8080", proxy_type="http").proxy_protocol, "http")
        self.assertRaises(ProxyError, proxy_info, http_proxy_host="127.0.0.1", http_proxy_port="8080", proxy_type="badval")
        self.assertEqual(proxy_info(http_proxy_host="example.com", http_proxy_port="8080", proxy_type="http").proxy_host, "example.com")
        self.assertEqual(proxy_info(http_proxy_host="127.0.0.1", http_proxy_port="8080", proxy_type="http").proxy_port, "8080")
        self.assertEqual(proxy_info(http_proxy_host="127.0.0.1", http_proxy_port="8080", proxy_type="http").auth, None)
        self.assertEqual(proxy_info(http_proxy_host="127.0.0.1", http_proxy_port="8080", proxy_type="http", http_proxy_auth=("my_username123", "my_pass321")).auth[0], "my_username123")
        self.assertEqual(proxy_info(http_proxy_host="127.0.0.1", http_proxy_port="8080", proxy_type="http", http_proxy_auth=("my_username123", "my_pass321")).auth[1], "my_pass321")


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