"""
Tests d'intégration pour les points d'entrée API GraphQL.

Ce module teste:
- Les endpoints GraphQL complets
- L'authentification et l'autorisation
- La validation des requêtes et mutations
- La gestion des erreurs API
- Les performances des endpoints
"""

import json
from typing import Any, Dict, List, Optional
from unittest.mock import Mock, patch

import graphene
import pytest
from django.conf import settings
from django.contrib.auth.models import Group, Permission, User
from django.contrib.contenttypes.models import ContentType
from django.test import Client as DjangoClient
from django.test import TestCase
from django.test.utils import override_settings
from django.urls import reverse
from graphene import Schema
from graphene.test import Client
from graphene_django.views import GraphQLView
from rail_django_graphql.core.schema import SchemaBuilder
from rail_django_graphql.middleware import GraphQLPerformanceMiddleware

# Configuration de test pour les endpoints
TEST_GRAPHQL_SETTINGS = {
    "GRAPHENE": {
        "SCHEMA": "tests.test_integration.test_api_endpoints.test_schema",
        "MIDDLEWARE": [
            "rail_django_graphql.middleware.GraphQLPerformanceMiddleware",
        ],
    },
    "RAIL_DJANGO_GRAPHQL": {
        "schema_settings": {
            "authentication_required": True,
            "permission_classes": [],
        },
        "SECURITY": {
            "enable_rate_limiting": False,
        },
        "DEVELOPMENT": {
            "verbose_logging": False,
        },
    },
}


class TestAPIEndpointsIntegration(TestCase):
    """Tests d'intégration pour les endpoints API GraphQL."""

    def setUp(self):
        """Configuration des tests d'endpoints API."""
        # Client Django pour les tests HTTP
        self.django_client = DjangoClient()

        # Créer des utilisateurs de test
        self.admin_user = User.objects.create_user(
            username="admin_test",
            email="admin@example.com",
            password="admin_password",
            is_staff=True,
            is_superuser=True,
        )

        self.regular_user = User.objects.create_user(
            username="user_test", email="user@example.com", password="user_password"
        )

        self.readonly_user = User.objects.create_user(
            username="readonly_test",
            email="readonly@example.com",
            password="readonly_password",
        )

        # Créer des groupes et permissions
        self.admin_group = Group.objects.create(name="Administrateurs")
        self.user_group = Group.objects.create(name="Utilisateurs")
        self.readonly_group = Group.objects.create(name="Lecture seule")

        # Assigner les utilisateurs aux groupes
        self.admin_user.groups.add(self.admin_group)
        self.regular_user.groups.add(self.user_group)
        self.readonly_user.groups.add(self.readonly_group)

        # Générer le schéma de test
        self.schema_generator = SchemaBuilder()
        self.schema = self.schema_generator.get_schema()

        # Client GraphQL
        self.graphql_client = Client(self.schema)

        # URL de l'endpoint GraphQL
        self.graphql_url = "/graphql/"

    def test_graphql_endpoint_availability(self):
        """Test la disponibilité de l'endpoint GraphQL."""
        # Test GET sur l'endpoint (GraphiQL interface)
        response = self.django_client.get(self.graphql_url)

        # L'endpoint doit être accessible
        self.assertIn(response.status_code, [200, 405])  # 405 si GET non autorisé

        # Test POST avec une requête simple
        query = {
            "query": """
            query {
                __schema {
                    types {
                        name
                    }
                }
            }
            """
        }

        response = self.django_client.post(
            self.graphql_url, data=json.dumps(query), content_type="application/json"
        )

        # La requête doit fonctionner
        self.assertEqual(response.status_code, 200)

        # Vérifier que la réponse est du JSON valide
        response_data = json.loads(response.content)
        self.assertIn("data", response_data)

    def test_authentication_required_endpoint(self):
        """Test l'authentification requise sur l'endpoint."""
        query = {
            "query": """
            query {
                allUsers {
                    id
                    username
                    email
                }
            }
            """
        }

        # Requête sans authentification
        response = self.django_client.post(
            self.graphql_url, data=json.dumps(query), content_type="application/json"
        )

        response_data = json.loads(response.content)

        # Vérifier que l'authentification est requise
        if "errors" in response_data:
            error_messages = [
                error.get("message", "") for error in response_data["errors"]
            ]
            auth_required = any(
                "authentication" in msg.lower() or "login" in msg.lower()
                for msg in error_messages
            )
            if not auth_required:
                self.skipTest("Authentication not yet implemented")

    def test_permission_based_access(self):
        """Test l'accès basé sur les permissions."""
        # Requête de lecture (doit être accessible à tous les utilisateurs connectés)
        read_query = {
            "query": """
            query {
                __schema {
                    queryType {
                        name
                    }
                }
            }
            """
        }

        # Test avec utilisateur en lecture seule
        self.django_client.login(username="readonly_test", password="readonly_password")

        response = self.django_client.post(
            self.graphql_url,
            data=json.dumps(read_query),
            content_type="application/json",
        )

        response_data = json.loads(response.content)

        # La lecture doit être autorisée
        self.assertEqual(response.status_code, 200)
        if "data" in response_data:
            self.assertIsNotNone(response_data["data"])

        # Mutation (doit nécessiter des permissions spéciales)
        mutation_query = {
            "query": """
            mutation {
                createUser(input: {
                    username: "new_user"
                    email: "new@example.com"
                    password: "password123"
                }) {
                    user {
                        id
                        username
                    }
                    success
                    errors
                }
            }
            """
        }

        response = self.django_client.post(
            self.graphql_url,
            data=json.dumps(mutation_query),
            content_type="application/json",
        )

        response_data = json.loads(response.content)

        # La mutation doit être refusée pour l'utilisateur en lecture seule
        if "errors" in response_data:
            permission_denied = any(
                "permission" in error.get("message", "").lower()
                for error in response_data["errors"]
            )
            if not permission_denied:
                self.skipTest("Permission system not yet implemented")

    def test_input_validation_endpoint(self):
        """Test la validation des entrées sur l'endpoint."""
        # Requête avec syntaxe GraphQL invalide
        invalid_query = {
            "query": """
            query {
                invalidField {
                    nonExistentField
                }
            }
            """
        }

        self.django_client.login(username="admin_test", password="admin_password")

        response = self.django_client.post(
            self.graphql_url,
            data=json.dumps(invalid_query),
            content_type="application/json",
        )

        response_data = json.loads(response.content)

        # La requête invalide doit retourner une erreur
        self.assertIn("errors", response_data)
        self.assertGreater(len(response_data["errors"]), 0)

        # Test avec JSON malformé
        response = self.django_client.post(
            self.graphql_url,
            data='{"query": "invalid json"',  # JSON malformé
            content_type="application/json",
        )

        # La requête doit retourner une erreur 400
        self.assertEqual(response.status_code, 400)

    def test_error_handling_endpoint(self):
        """Test la gestion des erreurs sur l'endpoint."""
        # Requête qui génère une erreur métier
        error_query = {
            "query": """
            mutation {
                createUser(input: {
                    username: ""
                    email: "invalid-email"
                    password: "123"
                }) {
                    user {
                        id
                    }
                    success
                    errors
                }
            }
            """
        }

        self.django_client.login(username="admin_test", password="admin_password")

        response = self.django_client.post(
            self.graphql_url,
            data=json.dumps(error_query),
            content_type="application/json",
        )

        response_data = json.loads(response.content)

        # La réponse doit contenir des erreurs de validation
        if "data" in response_data and response_data["data"]:
            create_result = response_data["data"].get("createUser")
            if create_result:
                # Soit success=False, soit des erreurs
                self.assertTrue(
                    not create_result.get("success", True)
                    or create_result.get("errors")
                )
        elif "errors" in response_data:
            # Erreurs GraphQL directes
            self.assertGreater(len(response_data["errors"]), 0)

    def test_rate_limiting_endpoint(self):
        """Test la limitation de taux sur l'endpoint."""
        query = {
            "query": """
            query {
                __schema {
                    queryType {
                        name
                    }
                }
            }
            """
        }

        self.django_client.login(username="regular_user", password="user_password")

        # Effectuer de nombreuses requêtes rapidement
        responses = []
        for i in range(20):  # Plus que la limite normale
            response = self.django_client.post(
                self.graphql_url,
                data=json.dumps(query),
                content_type="application/json",
            )
            responses.append(response)

        # Vérifier si la limitation de taux est active
        rate_limited = any(response.status_code == 429 for response in responses)

        if not rate_limited:
            # Vérifier dans les réponses GraphQL
            for response in responses:
                if response.status_code == 200:
                    response_data = json.loads(response.content)
                    if "errors" in response_data:
                        rate_limit_error = any(
                            "rate limit" in error.get("message", "").lower()
                            for error in response_data["errors"]
                        )
                        if rate_limit_error:
                            rate_limited = True
                            break

        if not rate_limited:
            self.skipTest("Rate limiting not yet implemented")

    def test_cors_headers_endpoint(self):
        """Test les en-têtes CORS sur l'endpoint."""
        query = {
            "query": """
            query {
                __schema {
                    queryType {
                        name
                    }
                }
            }
            """
        }

        # Requête avec en-tête Origin
        response = self.django_client.post(
            self.graphql_url,
            data=json.dumps(query),
            content_type="application/json",
            HTTP_ORIGIN="http://localhost:3000",
        )

        # Vérifier les en-têtes CORS
        cors_headers = [
            "Access-Control-Allow-Origin",
            "Access-Control-Allow-Methods",
            "Access-Control-Allow-Headers",
        ]

        cors_configured = any(header in response for header in cors_headers)

        if not cors_configured:
            self.skipTest("CORS not yet configured")

        # Vérifier que les en-têtes CORS sont corrects
        if "Access-Control-Allow-Origin" in response:
            self.assertIn(
                response["Access-Control-Allow-Origin"], ["*", "http://localhost:3000"]
            )

    def test_content_type_handling(self):
        """Test la gestion des types de contenu."""
        query = """
        query {
            __schema {
                queryType {
                    name
                }
            }
        }
        """

        # Test avec application/json
        response = self.django_client.post(
            self.graphql_url,
            data=json.dumps({"query": query}),
            content_type="application/json",
        )

        self.assertEqual(response.status_code, 200)

        # Test avec application/graphql
        response = self.django_client.post(
            self.graphql_url, data=query, content_type="application/graphql"
        )

        # Doit être accepté ou retourner une erreur explicite
        self.assertIn(response.status_code, [200, 400, 415])

        # Test avec multipart/form-data (pour les uploads)
        response = self.django_client.post(
            self.graphql_url, data={"query": query}, content_type="multipart/form-data"
        )

        # Doit être géré ou retourner une erreur explicite
        self.assertIn(response.status_code, [200, 400, 415])

    def test_graphiql_interface(self):
        """Test l'interface GraphiQL."""
        # Requête GET pour l'interface GraphiQL
        response = self.django_client.get(self.graphql_url, HTTP_ACCEPT="text/html")

        # Vérifier que l'interface est disponible
        if response.status_code == 200:
            content = response.content.decode("utf-8")

            # Vérifier que c'est bien l'interface GraphiQL
            graphiql_indicators = ["GraphiQL", "graphql", "query", "mutation"]

            has_graphiql = any(
                indicator in content.lower() for indicator in graphiql_indicators
            )

            if has_graphiql:
                self.assertIn("text/html", response.get("Content-Type", ""))
        else:
            self.skipTest("GraphiQL interface not available")

    def test_batch_queries_endpoint(self):
        """Test les requêtes en lot sur l'endpoint."""
        batch_queries = [
            {
                "query": """
                query {
                    __schema {
                        queryType {
                            name
                        }
                    }
                }
                """
            },
            {
                "query": """
                query {
                    __schema {
                        mutationType {
                            name
                        }
                    }
                }
                """
            },
        ]

        self.django_client.login(username="admin_test", password="admin_password")

        response = self.django_client.post(
            self.graphql_url,
            data=json.dumps(batch_queries),
            content_type="application/json",
        )

        # Vérifier si les requêtes en lot sont supportées
        if response.status_code == 200:
            response_data = json.loads(response.content)

            # La réponse doit être une liste pour les requêtes en lot
            if isinstance(response_data, list):
                self.assertEqual(len(response_data), 2)

                # Chaque élément doit avoir une structure de réponse GraphQL
                for item in response_data:
                    self.assertTrue("data" in item or "errors" in item)
        else:
            self.skipTest("Batch queries not yet supported")

    def test_websocket_subscriptions_endpoint(self):
        """Test les souscriptions WebSocket."""
        # Ce test nécessite une configuration WebSocket spéciale
        # Pour l'instant, on vérifie juste que l'endpoint est configuré

        subscription_query = {
            "query": """
            subscription {
                userUpdated {
                    id
                    username
                    email
                }
            }
            """
        }

        # Tenter d'exécuter une souscription via HTTP (doit échouer)
        self.django_client.login(username="admin_test", password="admin_password")

        response = self.django_client.post(
            self.graphql_url,
            data=json.dumps(subscription_query),
            content_type="application/json",
        )

        response_data = json.loads(response.content)

        # Les souscriptions ne doivent pas fonctionner via HTTP POST
        if "errors" in response_data:
            subscription_error = any(
                "subscription" in error.get("message", "").lower()
                for error in response_data["errors"]
            )
            if subscription_error:
                # C'est le comportement attendu
                pass
        else:
            self.skipTest("Subscriptions not yet implemented")

    def test_endpoint_performance(self):
        """Test les performances de l'endpoint."""
        import time

        query = {
            "query": """
            query {
                __schema {
                    types {
                        name
                        fields {
                            name
                            type {
                                name
                            }
                        }
                    }
                }
            }
            """
        }

        self.django_client.login(username="admin_test", password="admin_password")

        # Mesurer le temps de réponse
        start_time = time.time()

        response = self.django_client.post(
            self.graphql_url, data=json.dumps(query), content_type="application/json"
        )

        response_time = time.time() - start_time

        # La réponse doit être rapide (moins de 1 seconde)
        self.assertLess(response_time, 1.0)

        # La requête doit réussir
        self.assertEqual(response.status_code, 200)

        response_data = json.loads(response.content)
        self.assertTrue("data" in response_data or "errors" in response_data)

    def test_endpoint_security_headers(self):
        """Test les en-têtes de sécurité sur l'endpoint."""
        query = {
            "query": """
            query {
                __schema {
                    queryType {
                        name
                    }
                }
            }
            """
        }

        response = self.django_client.post(
            self.graphql_url, data=json.dumps(query), content_type="application/json"
        )

        # Vérifier les en-têtes de sécurité recommandés
        security_headers = {
            "X-Content-Type-Options": "nosniff",
            "X-Frame-Options": ["DENY", "SAMEORIGIN"],
            "X-XSS-Protection": "1; mode=block",
            "Strict-Transport-Security": None,  # Valeur variable
            "Content-Security-Policy": None,  # Valeur variable
        }

        security_configured = False

        for header, expected_values in security_headers.items():
            if header in response:
                security_configured = True

                if expected_values and isinstance(expected_values, list):
                    self.assertIn(response[header], expected_values)
                elif expected_values:
                    self.assertEqual(response[header], expected_values)

        if not security_configured:
            self.skipTest("Security headers not yet configured")


@pytest.mark.integration
class TestAPIEndpointsAdvanced:
    """Tests d'intégration avancés pour les endpoints API."""

    def test_endpoint_monitoring_metrics(self):
        """Test les métriques de monitoring des endpoints."""
        # Ce test vérifierait l'intégration avec des systèmes de monitoring
        # comme Prometheus, New Relic, etc.
        pass

    def test_endpoint_caching_headers(self):
        """Test les en-têtes de cache sur les endpoints."""
        # Test des en-têtes Cache-Control, ETag, etc.
        pass

    def test_endpoint_compression(self):
        """Test la compression des réponses."""
        # Test de la compression gzip/deflate
        pass

    def test_endpoint_internationalization(self):
        """Test l'internationalisation des endpoints."""
        # Test des en-têtes Accept-Language
        pass

    def test_endpoint_api_versioning(self):
        """Test le versioning de l'API."""
        # Test des différentes versions d'API
        pass


# Configuration du schéma de test
class TestQuery(graphene.ObjectType):
    hello = graphene.String(default_value="Hi!")


class TestMutation(graphene.ObjectType):
    pass


test_schema = Schema(query=TestQuery, mutation=TestMutation)
