#!/usr/bin/env python3

import inspect
import logging
import os
import random
import requests
import socket
import sys
import tempfile
import threading
import time
import unittest
from unittest.mock import MagicMock, patch

localmodule = os.path.realpath(
    os.path.join(os.path.dirname(inspect.getfile(inspect.currentframe())), '..')
)
print('localmodule: ' + localmodule)
if localmodule not in sys.path:
    sys.path.insert(0, localmodule)

from fdroidserver import common, net
from pathlib import Path


class RetryServer:
    """A stupid simple HTTP server that can fail to connect"""

    def __init__(self, port=None, failures=3):
        self.port = port
        if self.port is None:
            self.port = random.randint(1024, 65535)
        self.failures = failures
        self.stop_event = threading.Event()
        threading.Thread(target=self.run_fake_server).start()

    def stop(self):
        self.stop_event.set()

    def run_fake_server(self):
        server_sock = socket.socket()
        server_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        server_sock.bind(('127.0.0.1', self.port))
        server_sock.listen(5)
        server_sock.settimeout(5)
        time.sleep(0.001)  # wait for it to start

        while not self.stop_event.is_set():
            self.failures -= 1
            conn = None
            try:
                conn, address = server_sock.accept()
                conn.settimeout(5)
            except TimeoutError:
                break
            if self.failures > 0:
                conn.close()
                continue
            conn.recv(8192)  # request ignored
            self.reply = b"""HTTP/1.1 200 OK
                Date: Mon, 26 Feb 2024 09:00:14 GMT
                Connection: close
                Content-Type: text/html

                <HTML><BODY>Hello World!</HEAD></HTML>
                """
            self.reply = self.reply.replace(b'                ', b'')  # dedent
            conn.sendall(self.reply)
            conn.shutdown(socket.SHUT_RDWR)
            conn.close()

            self.stop_event.wait(timeout=1)
        server_sock.shutdown(socket.SHUT_RDWR)
        server_sock.close()


class NetTest(unittest.TestCase):
    basedir = Path(__file__).resolve().parent

    def setUp(self):
        logging.basicConfig(level=logging.DEBUG)
        self.tempdir = tempfile.TemporaryDirectory()
        os.chdir(self.tempdir.name)
        Path('tmp').mkdir()

    def tearDown(self):
        self.tempdir.cleanup()

    @patch('requests.get')
    def test_download_file_url_parsing(self, requests_get):
        # pylint: disable=unused-argument
        def _get(url, stream, allow_redirects, headers, timeout):
            return MagicMock()

        requests_get.side_effect = _get
        f = net.download_file('https://f-droid.org/repo/entry.jar', retries=0)
        requests_get.assert_called()
        self.assertTrue(os.path.exists(f))
        self.assertEqual('tmp/entry.jar', f)

        f = net.download_file(
            'https://d-05.example.com/custom/com.downloader.aegis-3175421.apk?_fn=QVBLUHVyZV92My4xNy41NF9hcGtwdXJlLmNvbS5hcGs&_p=Y29tLmFwa3B1cmUuYWVnb24&am=6avvTpfJ1dMl9-K6JYKzQw&arg=downloader%3A%2F%2Fcampaign%2F%3Futm_medium%3Ddownloader%26utm_source%3Daegis&at=1652080635&k=1f6e58465df3a441665e585719ab0b13627a117f&r=https%3A%2F%2Fdownloader.com%2Fdownloader-app.html%3Ficn%3Daegis%26ici%3Dimage_qr&uu=http%3A%2F%2F172.16.82.1%2Fcustom%2Fcom.downloader.aegis-3175421.apk%3Fk%3D3fb9c4ae0be578206f6a1c330736fac1627a117f',
            retries=0,
        )
        self.assertTrue(requests_get.called)
        self.assertTrue(os.path.exists(f))
        self.assertEqual('tmp/com.downloader.aegis-3175421.apk', f)

    def test_download_file_retries(self):
        server = RetryServer()
        f = net.download_file('http://localhost:%d/f.txt' % server.port)
        # strip the HTTP headers and compare the reply
        self.assertEqual(server.reply.split(b'\n\n')[1], Path(f).read_bytes())
        server.stop()

    def test_download_file_retries_not_forever(self):
        """The retry logic should eventually exit with an error."""
        server = RetryServer(failures=5)
        with self.assertRaises(requests.exceptions.ConnectionError):
            net.download_file('http://localhost:%d/f.txt' % server.port)
        server.stop()


if __name__ == "__main__":
    os.chdir(os.path.dirname(__file__))

    import argparse

    parser = argparse.ArgumentParser()
    parser.add_argument(
        "-v",
        "--verbose",
        action="store_true",
        default=False,
        help="Spew out even more information than normal",
    )
    common.options = common.parse_args(parser)

    newSuite = unittest.TestSuite()
    newSuite.addTest(unittest.makeSuite(NetTest))
    unittest.main(failfast=False)
