from django.test import TestCase
from django.urls import reverse
from rest_framework.test import APIClient
from rest_framework import status
from django.contrib.auth import get_user_model

User = get_user_model()


class Phase0InfrastructureTests(TestCase):
    """
    Automated verification tests for Phase 0 infrastructure:
    - OpenAPI 3.0 schema endpoints via drf-spectacular
    - Swagger UI & ReDoc interfaces
    - JWT token issue, refresh, and verification endpoints
    - Core API health checks
    """
    def setUp(self):
        self.client = APIClient()
        self.user = User.objects.create_user(
            email='tester@shiadeepconnect.org',
            username='tester@shiadeepconnect.org',
            password='SecurePassword123!',
            fullname='Tester User'
        )

    def test_health_check_endpoint(self):
        response = self.client.get('/api/v1/health/')
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertEqual(response.data.get('status'), 'healthy')
        self.assertEqual(response.data.get('version'), '1.0.0')

    def test_openapi_schema_endpoint(self):
        response = self.client.get('/api/schema/')
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertIn('openapi', response.content.decode('utf-8'))

    def test_swagger_ui_endpoint(self):
        response = self.client.get('/api/schema/swagger-ui/')
        self.assertEqual(response.status_code, status.HTTP_200_OK)

    def test_redoc_endpoint(self):
        response = self.client.get('/api/schema/redoc/')
        self.assertEqual(response.status_code, status.HTTP_200_OK)

    def test_swagger_legacy_redirect(self):
        response = self.client.get('/swagger/')
        self.assertIn(response.status_code, [status.HTTP_302_FOUND, status.HTTP_301_MOVED_PERMANENTLY])
        self.assertEqual(response.url, '/api/schema/swagger-ui/')

    def test_jwt_token_obtain_pair(self):
        # Obtain JWT tokens
        payload = {
            'email': 'tester@shiadeepconnect.org',
            'password': 'SecurePassword123!'
        }
        response = self.client.post('/api/v1/auth/token/', payload, format='json')
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertIn('access', response.data)
        self.assertIn('refresh', response.data)

        access_token = response.data['access']
        refresh_token = response.data['refresh']

        # Verify token
        verify_response = self.client.post(
            '/api/v1/auth/token/verify/',
            {'token': access_token},
            format='json'
        )
        self.assertEqual(verify_response.status_code, status.HTTP_200_OK)

        # Refresh token
        refresh_response = self.client.post(
            '/api/v1/auth/token/refresh/',
            {'refresh': refresh_token},
            format='json'
        )
        self.assertEqual(refresh_response.status_code, status.HTTP_200_OK)
        self.assertIn('access', refresh_response.data)