import json
import unittest
from http.client import HTTPConnection
from threading import Thread
from time import sleep
from unittest.mock import MagicMock

from constants import DEVICE_INVALID_MESSAGE
from public_gateway import PublicGatewayApp
from public_server import serve_public
from utils.security import generate_gateway_session_id


class TestPublicServerIntegration(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        # Create mock dependencies
        cls.mock_session_store = MagicMock()
        cls.mock_api_client = MagicMock()
        cls.mock_auth_client = MagicMock()

        # Create gateway app
        cls.gateway_app = PublicGatewayApp(
            session_store=cls.mock_session_store,
            api_client=cls.mock_api_client,
            auth_client=cls.mock_auth_client
        )

        # Start server in background thread
        cls.server_thread = Thread(
            target=serve_public,
            args=(cls.gateway_app,),
            kwargs={'host': '127.0.0.1', 'port': 18765, 'enable_rate_limit': False},
            daemon=True
        )
        cls.server_thread.start()

        # Wait for server to start
        sleep(0.5)

    def setUp(self):
        # Reset mocks before each test
        self.mock_session_store.reset_mock()
        self.mock_api_client.reset_mock()
        self.mock_auth_client.reset_mock()

    def _make_request(self, method, params=None, headers=None):
        """Helper to make JSON-RPC requests"""
        conn = HTTPConnection('127.0.0.1', 18765, timeout=5)
        try:
            body = json.dumps({
                'jsonrpc': '2.0',
                'id': 1,
                'method': method,
                'params': params or {}
            })

            request_headers = {'Content-Type': 'application/json'}
            if headers:
                request_headers.update(headers)

            conn.request('POST', '/mcp', body.encode('utf-8'), request_headers)
            response = conn.getresponse()
            data = response.read().decode('utf-8')
            return json.loads(data)
        finally:
            conn.close()

    def test_health_check(self):
        conn = HTTPConnection('127.0.0.1', 18765, timeout=5)
        try:
            conn.request('GET', '/health')
            response = conn.getresponse()
            data = json.loads(response.read().decode('utf-8'))

            self.assertEqual(response.status, 200)
            self.assertTrue(data['ok'])
        finally:
            conn.close()

    def test_initialize(self):
        result = self._make_request('initialize')

        self.assertIn('result', result)
        self.assertIn('protocolVersion', result['result'])
        self.assertIn('serverInfo', result['result'])

    def test_tools_list(self):
        result = self._make_request('tools/list')

        self.assertIn('result', result)
        self.assertIn('tools', result['result'])
        tools = result['result']['tools']
        self.assertGreater(len(tools), 0)
        tool_names = [tool['name'] for tool in tools]
        self.assertIn('query_order', tool_names)
        self.assertIn('query_track', tool_names)
        self.assertNotIn('bind_auth_code', tool_names)

        # Check tool structure
        for tool in tools:
            self.assertIn('name', tool)
            self.assertIn('description', tool)
            self.assertIn('inputSchema', tool)

    def test_tools_call_without_session(self):
        result = self._make_request('tools/call', {'name': 'query_order', 'arguments': {}})

        self.assertIn('result', result)
        self.assertTrue(result['result']['isError'])
        self.assertIn(DEVICE_INVALID_MESSAGE, result['result']['content'][0]['text'])

    def test_tools_call_bind_auth_code_is_not_registered_in_public_mode(self):
        session_id = generate_gateway_session_id()
        auth_code = 'AC_test123'

        result = self._make_request(
            'tools/call',
            {
                'name': 'bind_auth_code',
                'arguments': {'auth_code': auth_code}
            },
            {'X-Gateway-Session': session_id}
        )

        self.assertIn('result', result)
        self.assertTrue(result['result']['isError'])
        self.assertIn('tool not registered', result['result']['content'][0]['text'])
        self.mock_auth_client.exchange.assert_not_called()

    def test_tools_call_with_valid_session(self):
        session_id = generate_gateway_session_id()

        self.mock_session_store.get.return_value = {
            'mcp_token': 'MT_valid_token',
            'admin_id': 456,
            'company_id': 200
        }

        self.mock_api_client.call_tool.return_value = {
            'code': '0',
            'msg': 'success',
            'data': {'order_no': 'ABC123'}
        }

        result = self._make_request(
            'tools/call',
            {
                'name': 'query_order',
                'arguments': {'order_no': 'ABC123'}
            },
            {'X-Gateway-Session': session_id}
        )

        self.assertIn('result', result)
        self.assertFalse(result['result']['isError'])
        self.mock_api_client.call_tool.assert_called_once()

    def test_method_not_found(self):
        result = self._make_request('nonexistent_method')

        self.assertIn('error', result)
        self.assertEqual(result['error']['code'], -32601)
        self.assertIn('Method not found', result['error']['message'])

    def test_404_for_invalid_path(self):
        conn = HTTPConnection('127.0.0.1', 18765, timeout=5)
        try:
            conn.request('POST', '/invalid')
            response = conn.getresponse()

            self.assertEqual(response.status, 404)
        finally:
            conn.close()

    def test_session_from_authorization_header(self):
        session_id = generate_gateway_session_id()

        self.mock_session_store.get.return_value = {
            'mcp_token': 'MT_token',
            'admin_id': 1,
            'company_id': 1
        }

        self.mock_api_client.call_tool.return_value = {'code': '0', 'data': {}}

        result = self._make_request(
            'tools/call',
            {'name': 'query_order', 'arguments': {}},
            {'Authorization': f'Bearer {session_id}'}
        )

        self.assertIn('result', result)
        self.assertFalse(result['result']['isError'])

    def test_session_from_cookie(self):
        session_id = generate_gateway_session_id()

        self.mock_session_store.get.return_value = {
            'mcp_token': 'MT_token',
            'admin_id': 1,
            'company_id': 1
        }

        self.mock_api_client.call_tool.return_value = {'code': '0', 'data': {}}

        result = self._make_request(
            'tools/call',
            {'name': 'query_order', 'arguments': {}},
            {'Cookie': f'gateway_session_id={session_id}; other=value'}
        )

        self.assertIn('result', result)
        self.assertFalse(result['result']['isError'])


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