import unittest
from unittest.mock import patch, mock_open, MagicMock
import main
import time
import json
import http.server
import threading

class TestMain(unittest.TestCase):

    @patch('main.requests.post')
    @patch('main.open', new_callable=mock_open)
    def test_setup(self, mock_file, mock_post):
        mock_resp = MagicMock()
        mock_resp.json.return_value = {
            'device_code': 'test_device_code',
            'user_code': 'test_user_code',
            'verification_uri': 'test_verification_uri'
        }
        mock_post.return_value = mock_resp

        with patch('builtins.print') as mock_print:
            main.setup()
            mock_print.assert_any_call('Please visit test_verification_uri and enter code test_user_code to authenticate.')

        mock_file().write.assert_called_once_with('test_access_token')

    @patch('main.requests.get')
    @patch('main.open', new_callable=mock_open, read_data='test_access_token')
    def test_get_token(self, mock_file, mock_get):
        mock_resp = MagicMock()
        mock_resp.json.return_value = {'token': 'test_token'}
        mock_get.return_value = mock_resp

        main.get_token()
        self.assertEqual(main.token, 'test_token')

    @patch('main.get_token')
    @patch('main.time.sleep', return_value=None)
    def test_token_thread(self, mock_sleep, mock_get_token):
        with patch('threading.Thread.start') as mock_start:
            thread = threading.Thread(target=main.token_thread)
            thread.start()
            mock_start.assert_called_once()

    @patch('main.requests.post')
    @patch('main.is_token_invalid', return_value=True)
    @patch('main.get_token')
    def test_copilot(self, mock_get_token, mock_is_token_invalid, mock_post):
        mock_resp = MagicMock()
        mock_resp.text = 'data: {"choices":[{"text":"test_completion"}]}'
        mock_post.return_value = mock_resp

        result = main.copilot('test_prompt')
        self.assertEqual(result, 'test_completion')

    def test_is_token_invalid(self):
        valid_token = 'exp=9999999999'
        invalid_token = 'exp=0'
        self.assertFalse(main.is_token_invalid(valid_token))
        self.assertTrue(main.is_token_invalid(invalid_token))

    def test_extract_exp_value(self):
        token = 'key1=value1; exp=1234567890; key2=value2'
        self.assertEqual(main.extract_exp_value(token), 1234567890)

    @patch('main.copilot', return_value='test_completion')
    def test_HTTPRequestHandler(self, mock_copilot):
        handler = main.HTTPRequestHandler
        handler.rfile = MagicMock()
        handler.rfile.read.return_value = json.dumps({'prompt': 'test_prompt', 'language': 'python'}).encode()
        handler.headers = {'Content-Length': len(handler.rfile.read.return_value)}
        handler.wfile = MagicMock()

        handler.do_POST(handler)

        handler.wfile.write.assert_called_once_with(b'test_completion')

    @patch('main.threading.Thread.start')
    @patch('main.http.server.HTTPServer.serve_forever')
    def test_main(self, mock_serve_forever, mock_thread_start):
        with patch('builtins.print') as mock_print:
            with patch('sys.argv', ['main.py', '8080']):
                main.main()
                mock_print.assert_any_call('Listening on port 0.0.0.0:8080...')
                mock_thread_start.assert_called_once()
                mock_serve_forever.assert_called_once()

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