"""
Tests for glossary CRUD endpoints.
Story 3.9: Glossaires - Endpoint CRUD
"""

import pytest
import jwt
from datetime import datetime, timezone
from pathlib import Path

from fastapi.testclient import TestClient

from database.connection import get_sync_session
from database.models import Glossary, GlossaryTerm

REGISTER_URL = "/api/v1/auth/register"
LOGIN_URL = "/api/v1/auth/login"
GLOSSARIES_URL = "/api/v1/glossaries"


@pytest.fixture
def users_file(tmp_path: Path) -> Path:
    return tmp_path / "users.json"


@pytest.fixture
def client(users_file: Path, monkeypatch):
    """TestClient with JSON auth and rate limiting disabled."""
    import services.auth_service as auth_svc
    from middleware.rate_limiting import RateLimitManager

    monkeypatch.setattr(auth_svc, "USERS_FILE", users_file)
    monkeypatch.setattr(auth_svc, "USE_DATABASE", False)
    monkeypatch.setattr(auth_svc, "DATABASE_AVAILABLE", False)

    async def _check_request_allow(self, request):
        return True, "ok", "test"

    async def _check_translation_allow(self, request, file_size_mb=0):
        return True, "ok"

    monkeypatch.setattr(RateLimitManager, "check_request", _check_request_allow)
    monkeypatch.setattr(RateLimitManager, "check_translation", _check_translation_allow)

    from main import app

    return TestClient(app, raise_server_exceptions=True)


@pytest.fixture
def pro_user_token(client, monkeypatch):
    """Create a Pro user and return auth token."""
    import services.auth_service as auth_svc

    if not auth_svc.JWT_AVAILABLE:
        pytest.skip("PyJWT non disponible dans cet environnement")

    email = "pro@test.com"
    password = "Password123!"

    client.post(
        REGISTER_URL, json={"email": email, "password": password, "name": "Pro User"}
    )

    r = client.post(LOGIN_URL, json={"email": email, "password": password})
    assert r.status_code == 200, r.text
    token = r.json()["data"]["access_token"]
    payload = jwt.decode(token, auth_svc.SECRET_KEY, algorithms=["HS256"])
    user_id = payload["sub"]

    users = auth_svc.load_users()
    if user_id in users:
        users[user_id]["plan"] = "pro"
        auth_svc.save_users(users)

    return token, user_id


@pytest.fixture
def free_user_token(client):
    """Create a Free user and return auth token."""
    import services.auth_service as auth_svc

    if not auth_svc.JWT_AVAILABLE:
        pytest.skip("PyJWT non disponible dans cet environnement")

    email = "free@test.com"
    password = "Password123!"

    client.post(
        REGISTER_URL, json={"email": email, "password": password, "name": "Free User"}
    )

    r = client.post(LOGIN_URL, json={"email": email, "password": password})
    assert r.status_code == 200, r.text
    token = r.json()["data"]["access_token"]
    payload = jwt.decode(token, auth_svc.SECRET_KEY, algorithms=["HS256"])
    user_id = payload["sub"]
    return token, user_id


def _auth_header(token):
    return {"Authorization": f"Bearer {token}"}


class TestGlossaryCRUD:
    """Tests for glossary CRUD operations."""

    def test_create_glossary_pro_user(self, client, pro_user_token):
        """Pro user can create a glossary."""
        token, _ = pro_user_token

        response = client.post(
            GLOSSARIES_URL,
            json={
                "name": "Test Glossary",
                "terms": [
                    {"source": "hello", "target": "bonjour"},
                    {"source": "world", "target": "monde"},
                ],
            },
            headers=_auth_header(token),
        )

        assert response.status_code == 201
        data = response.json()["data"]
        assert data["name"] == "Test Glossary"
        assert len(data["terms"]) == 2
        assert data["terms"][0]["source"] == "hello"
        assert data["terms"][0]["target"] == "bonjour"

    def test_create_glossary_free_user_forbidden(self, client, free_user_token):
        """Free user cannot create glossaries."""
        token, _ = free_user_token

        response = client.post(
            GLOSSARIES_URL,
            json={"name": "Test", "terms": []},
            headers=_auth_header(token),
        )

        assert response.status_code == 403
        data = response.json()
        assert data["error"] == "PRO_FEATURE_REQUIRED"

    def test_create_glossary_unauthorized(self, client):
        """Unauthorized user cannot create glossaries."""
        response = client.post(
            GLOSSARIES_URL,
            json={"name": "Test", "terms": []},
        )

        assert response.status_code == 401

    def test_list_glossaries(self, client, pro_user_token):
        """Pro user can list their glossaries."""
        token, user_id = pro_user_token

        with get_sync_session() as session:
            for i in range(3):
                glossary = Glossary(
                    user_id=user_id,
                    name=f"Glossary {i}",
                    created_at=datetime.now(timezone.utc),
                    updated_at=datetime.now(timezone.utc),
                )
                session.add(glossary)
            session.commit()

        response = client.get(GLOSSARIES_URL, headers=_auth_header(token))

        assert response.status_code == 200
        data = response.json()
        assert len(data["data"]) == 3
        assert data["meta"]["total"] == 3

    def test_list_glossaries_free_user_forbidden(self, client, free_user_token):
        """Free user cannot list glossaries."""
        token, _ = free_user_token

        response = client.get(GLOSSARIES_URL, headers=_auth_header(token))

        assert response.status_code == 403

    def test_get_glossary(self, client, pro_user_token):
        """Pro user can get a specific glossary."""
        token, user_id = pro_user_token

        with get_sync_session() as session:
            glossary = Glossary(
                user_id=user_id,
                name="Test Glossary",
                created_at=datetime.now(timezone.utc),
                updated_at=datetime.now(timezone.utc),
            )
            term = GlossaryTerm(
                glossary=glossary,
                source="hello",
                target="bonjour",
                created_at=datetime.now(timezone.utc),
            )
            session.add(glossary)
            session.add(term)
            session.commit()
            glossary_id = glossary.id

        response = client.get(
            f"{GLOSSARIES_URL}/{glossary_id}", headers=_auth_header(token)
        )

        assert response.status_code == 200
        data = response.json()["data"]
        assert data["name"] == "Test Glossary"
        assert len(data["terms"]) == 1
        assert data["terms"][0]["source"] == "hello"

    def test_get_glossary_not_owner(self, client, monkeypatch):
        """User cannot access another user's glossary."""
        import services.auth_service as auth_svc

        if not auth_svc.JWT_AVAILABLE:
            pytest.skip("PyJWT non disponible")

        # Create user 1 (Pro)
        email1 = "pro1@test.com"
        password1 = "Password123!"
        client.post(
            REGISTER_URL,
            json={"email": email1, "password": password1, "name": "Pro User 1"},
        )
        r1 = client.post(LOGIN_URL, json={"email": email1, "password": password1})
        token1 = r1.json()["data"]["access_token"]
        payload1 = jwt.decode(token1, auth_svc.SECRET_KEY, algorithms=["HS256"])
        user_id1 = payload1["sub"]
        users = auth_svc.load_users()
        if user_id1 in users:
            users[user_id1]["plan"] = "pro"
            auth_svc.save_users(users)

        # Create user 2 (Pro)
        email2 = "pro2@test.com"
        password2 = "Password123!"
        client.post(
            REGISTER_URL,
            json={"email": email2, "password": password2, "name": "Pro User 2"},
        )
        r2 = client.post(LOGIN_URL, json={"email": email2, "password": password2})
        token2 = r2.json()["data"]["access_token"]
        payload2 = jwt.decode(token2, auth_svc.SECRET_KEY, algorithms=["HS256"])
        user_id2 = payload2["sub"]
        users = auth_svc.load_users()
        if user_id2 in users:
            users[user_id2]["plan"] = "pro"
            auth_svc.save_users(users)

        # Create glossary as user 1
        with get_sync_session() as session:
            glossary = Glossary(
                user_id=user_id1,
                name="User 1 Glossary",
                created_at=datetime.now(timezone.utc),
                updated_at=datetime.now(timezone.utc),
            )
            session.add(glossary)
            session.commit()
            glossary_id = glossary.id

        # Try to access as user 2
        response = client.get(
            f"{GLOSSARIES_URL}/{glossary_id}", headers=_auth_header(token2)
        )

        assert response.status_code == 404
        assert response.json()["error"] == "GLOSSARY_NOT_FOUND"

    def test_update_glossary(self, client, pro_user_token):
        """Pro user can update their glossary."""
        token, user_id = pro_user_token

        with get_sync_session() as session:
            glossary = Glossary(
                user_id=user_id,
                name="Original Name",
                created_at=datetime.now(timezone.utc),
                updated_at=datetime.now(timezone.utc),
            )
            session.add(glossary)
            session.commit()
            glossary_id = glossary.id

        response = client.patch(
            f"{GLOSSARIES_URL}/{glossary_id}",
            json={"name": "Updated Name"},
            headers=_auth_header(token),
        )

        assert response.status_code == 200
        assert response.json()["data"]["name"] == "Updated Name"

    def test_update_glossary_terms(self, client, pro_user_token):
        """Pro user can update glossary terms."""
        token, user_id = pro_user_token

        with get_sync_session() as session:
            glossary = Glossary(
                user_id=user_id,
                name="Test Glossary",
                created_at=datetime.now(timezone.utc),
                updated_at=datetime.now(timezone.utc),
            )
            term = GlossaryTerm(
                glossary=glossary,
                source="old",
                target="vieux",
                created_at=datetime.now(timezone.utc),
            )
            session.add(glossary)
            session.add(term)
            session.commit()
            glossary_id = glossary.id

        response = client.patch(
            f"{GLOSSARIES_URL}/{glossary_id}",
            json={
                "terms": [
                    {"source": "new", "target": "nouveau"},
                ]
            },
            headers=_auth_header(token),
        )

        assert response.status_code == 200
        data = response.json()["data"]
        assert len(data["terms"]) == 1
        assert data["terms"][0]["source"] == "new"

    def test_delete_glossary(self, client, pro_user_token):
        """Pro user can delete their glossary."""
        token, user_id = pro_user_token

        with get_sync_session() as session:
            glossary = Glossary(
                user_id=user_id,
                name="To Delete",
                created_at=datetime.now(timezone.utc),
                updated_at=datetime.now(timezone.utc),
            )
            session.add(glossary)
            session.commit()
            glossary_id = glossary.id

        response = client.delete(
            f"{GLOSSARIES_URL}/{glossary_id}", headers=_auth_header(token)
        )

        assert response.status_code == 204

        response = client.get(
            f"{GLOSSARIES_URL}/{glossary_id}", headers=_auth_header(token)
        )
        assert response.status_code == 404

    def test_delete_glossary_cascades_terms(self, client, pro_user_token):
        """Deleting a glossary should delete all its terms."""
        token, user_id = pro_user_token

        with get_sync_session() as session:
            glossary = Glossary(
                user_id=user_id,
                name="To Delete",
                created_at=datetime.now(timezone.utc),
                updated_at=datetime.now(timezone.utc),
            )
            term = GlossaryTerm(
                glossary=glossary,
                source="hello",
                target="bonjour",
                created_at=datetime.now(timezone.utc),
            )
            session.add(glossary)
            session.add(term)
            session.commit()
            glossary_id = glossary.id

        response = client.delete(
            f"{GLOSSARIES_URL}/{glossary_id}", headers=_auth_header(token)
        )
        assert response.status_code == 204

        with get_sync_session() as session:
            remaining_terms = (
                session.query(GlossaryTerm)
                .filter(GlossaryTerm.glossary_id == glossary_id)
                .count()
            )
            assert remaining_terms == 0

    def test_create_glossary_with_empty_terms(self, client, pro_user_token):
        """Pro user can create a glossary with no terms."""
        token, _ = pro_user_token

        response = client.post(
            GLOSSARIES_URL,
            json={"name": "Empty Glossary", "terms": []},
            headers=_auth_header(token),
        )

        assert response.status_code == 201
        data = response.json()["data"]
        assert data["name"] == "Empty Glossary"
        assert len(data["terms"]) == 0

    def test_invalid_glossary_id_format(self, client, pro_user_token):
        """Invalid glossary ID format returns 400."""
        token, _ = pro_user_token

        response = client.get(
            f"{GLOSSARIES_URL}/invalid-uuid", headers=_auth_header(token)
        )

        assert response.status_code == 400
        assert response.json()["error"] == "INVALID_GLOSSARY_ID"