#!/usr/bin/env python3
"""
Unit tests for email Flask endpoints in api/app.py.

Covers:
  GET    /api/email/users
  POST   /api/email/users
  DELETE /api/email/users/<username>
  GET    /api/email/status
  GET    /api/email/connectivity
"""

import sys
import json
import unittest
from pathlib import Path
from unittest.mock import patch, MagicMock

api_dir = Path(__file__).parent.parent / 'api'
sys.path.insert(0, str(api_dir))

from app import app


class TestGetEmailUsers(unittest.TestCase):

    def setUp(self):
        app.config['TESTING'] = True
        self.client = app.test_client()

    @patch('app.email_manager')
    def test_get_users_returns_200_with_list(self, mock_em):
        mock_em.get_users.return_value = [
            {'username': 'alice@cell', 'domain': 'cell'},
            {'username': 'bob@cell', 'domain': 'cell'},
        ]
        r = self.client.get('/api/email/users')
        self.assertEqual(r.status_code, 200)
        data = json.loads(r.data)
        self.assertIsInstance(data, list)
        self.assertEqual(len(data), 2)

    @patch('app.email_manager')
    def test_get_users_returns_empty_list_when_no_users(self, mock_em):
        mock_em.get_users.return_value = []
        r = self.client.get('/api/email/users')
        self.assertEqual(r.status_code, 200)
        self.assertEqual(json.loads(r.data), [])

    @patch('app.email_manager')
    def test_get_users_returns_500_on_exception(self, mock_em):
        mock_em.get_users.side_effect = Exception('mailbox unreachable')
        r = self.client.get('/api/email/users')
        self.assertEqual(r.status_code, 500)
        self.assertIn('error', json.loads(r.data))


class TestCreateEmailUser(unittest.TestCase):

    def setUp(self):
        app.config['TESTING'] = True
        self.client = app.test_client()

    @patch('app.email_manager')
    def test_create_user_returns_200_on_success(self, mock_em):
        mock_em.create_email_user.return_value = True
        r = self.client.post(
            '/api/email/users',
            data=json.dumps({'username': 'alice', 'password': 'secret123'}),
            content_type='application/json',
        )
        self.assertEqual(r.status_code, 200)
        data = json.loads(r.data)
        self.assertIn('created', data)

    @patch('app.email_manager')
    def test_create_user_calls_manager_with_username_and_password(self, mock_em):
        mock_em.create_email_user.return_value = True
        self.client.post(
            '/api/email/users',
            data=json.dumps({'username': 'alice', 'password': 'secret123'}),
            content_type='application/json',
        )
        mock_em.create_email_user.assert_called_once()
        args = mock_em.create_email_user.call_args[0]
        self.assertEqual(args[0], 'alice')
        self.assertEqual(args[2], 'secret123')

    @patch('app.email_manager')
    def test_create_user_returns_400_when_username_missing(self, mock_em):
        r = self.client.post(
            '/api/email/users',
            data=json.dumps({'password': 'secret123'}),
            content_type='application/json',
        )
        self.assertEqual(r.status_code, 400)
        self.assertIn('error', json.loads(r.data))
        mock_em.create_email_user.assert_not_called()

    @patch('app.email_manager')
    def test_create_user_returns_400_when_password_missing(self, mock_em):
        r = self.client.post(
            '/api/email/users',
            data=json.dumps({'username': 'alice'}),
            content_type='application/json',
        )
        self.assertEqual(r.status_code, 400)
        self.assertIn('error', json.loads(r.data))
        mock_em.create_email_user.assert_not_called()

    @patch('app.email_manager')
    def test_create_user_returns_400_when_no_body(self, mock_em):
        r = self.client.post('/api/email/users')
        self.assertEqual(r.status_code, 400)
        self.assertIn('error', json.loads(r.data))

    @patch('app.email_manager')
    def test_create_user_returns_500_on_exception(self, mock_em):
        mock_em.create_email_user.side_effect = Exception('SMTP config error')
        r = self.client.post(
            '/api/email/users',
            data=json.dumps({'username': 'alice', 'password': 'secret123'}),
            content_type='application/json',
        )
        self.assertEqual(r.status_code, 500)
        self.assertIn('error', json.loads(r.data))


class TestDeleteEmailUser(unittest.TestCase):

    def setUp(self):
        app.config['TESTING'] = True
        self.client = app.test_client()

    @patch('app.email_manager')
    def test_delete_user_returns_200_on_success(self, mock_em):
        mock_em.delete_email_user.return_value = True
        r = self.client.delete('/api/email/users/alice')
        self.assertEqual(r.status_code, 200)
        data = json.loads(r.data)
        self.assertIn('deleted', data)

    @patch('app.email_manager')
    def test_delete_user_calls_manager_with_username(self, mock_em):
        mock_em.delete_email_user.return_value = True
        self.client.delete('/api/email/users/bob')
        mock_em.delete_email_user.assert_called_once()
        args = mock_em.delete_email_user.call_args[0]
        self.assertEqual(args[0], 'bob')

    @patch('app.email_manager')
    def test_delete_user_returns_500_on_exception(self, mock_em):
        mock_em.delete_email_user.side_effect = Exception('LDAP error')
        r = self.client.delete('/api/email/users/alice')
        self.assertEqual(r.status_code, 500)
        self.assertIn('error', json.loads(r.data))


class TestGetEmailStatus(unittest.TestCase):

    def setUp(self):
        app.config['TESTING'] = True
        self.client = app.test_client()

    @patch('app.email_manager')
    def test_get_status_returns_200_with_status_dict(self, mock_em):
        mock_em.get_status.return_value = {
            'running': True,
            'smtp_port': 25,
            'imap_port': 993,
        }
        r = self.client.get('/api/email/status')
        self.assertEqual(r.status_code, 200)
        data = json.loads(r.data)
        self.assertIn('running', data)

    @patch('app.email_manager')
    def test_get_status_returns_500_on_exception(self, mock_em):
        mock_em.get_status.side_effect = Exception('container not found')
        r = self.client.get('/api/email/status')
        self.assertEqual(r.status_code, 500)
        self.assertIn('error', json.loads(r.data))


class TestEmailConnectivity(unittest.TestCase):

    def setUp(self):
        app.config['TESTING'] = True
        self.client = app.test_client()

    @patch('app.email_manager')
    def test_connectivity_returns_200_with_result(self, mock_em):
        mock_em.test_connectivity.return_value = {
            'smtp': True,
            'imap': True,
            'latency_ms': 12,
        }
        r = self.client.get('/api/email/connectivity')
        self.assertEqual(r.status_code, 200)
        data = json.loads(r.data)
        self.assertIn('smtp', data)

    @patch('app.email_manager')
    def test_connectivity_returns_500_on_exception(self, mock_em):
        mock_em.test_connectivity.side_effect = Exception('timeout')
        r = self.client.get('/api/email/connectivity')
        self.assertEqual(r.status_code, 500)
        self.assertIn('error', json.loads(r.data))


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