from types import SimpleNamespace

import pytest
from flask import Flask, g
from sqlalchemy import create_engine

from app.api import simulation_bp
from app.api.auth import auth_bp
from app.api.simulation import _simulation_manager_for_request
from app.config import Config
from app.db import Base, create_session_factory
from app.models.memory import MemoryGraph, MemoryNode
from app.models.project import ProjectManager
from app.security.policy import Role
from app.services.identity import IdentityRepository, PasswordService
from app.services.memory_entity_reader import LocalEntityReader
from app.utils.api_errors import ApiError


def make_app():
    engine = create_engine("sqlite+pysqlite:///:memory:")
    Base.metadata.create_all(engine)
    app = Flask(__name__)
    app.config.update(TESTING=True, SECRET_KEY="test-secret", SESSION_COOKIE_SECURE=False)
    app.extensions["crowdsight_session_factory"] = create_session_factory(engine)
    return app, engine


def test_local_memory_backend_selects_scoped_reader_factory(monkeypatch):
    app, engine = make_app()
    old_backend = Config.MEMORY_BACKEND
    try:
        monkeypatch.setattr(Config, "MEMORY_BACKEND", "local")
        with app.test_request_context("/api/simulation/prepare"):
            g.auth_context = SimpleNamespace(
                user=SimpleNamespace(id="user-a"),
                membership=SimpleNamespace(role=Role.USER),
                organization=SimpleNamespace(id="org-a"),
            )
            manager = _simulation_manager_for_request()
            reader = manager.create_entity_reader("graph-a")
            assert isinstance(reader, LocalEntityReader)
            assert reader.repository.organization_id == "org-a"
            reader.close()
    finally:
        Config.MEMORY_BACKEND = old_backend
        engine.dispose()


def test_unknown_memory_backend_fails_closed(monkeypatch):
    app, engine = make_app()
    old_backend = Config.MEMORY_BACKEND
    try:
        monkeypatch.setattr(Config, "MEMORY_BACKEND", "unknown")
        with app.test_request_context("/api/simulation/prepare"):
            g.auth_context = SimpleNamespace(
                user=SimpleNamespace(id="user-a"),
                membership=SimpleNamespace(role=Role.USER),
                organization=SimpleNamespace(id="org-a"),
            )
            with pytest.raises(ApiError) as error:
                _simulation_manager_for_request()
            assert error.value.code == "invalid_memory_backend"
    finally:
        Config.MEMORY_BACKEND = old_backend
        engine.dispose()


def test_local_entity_route_reads_scoped_memory_graph(monkeypatch):
    app, engine = make_app()
    app.register_blueprint(auth_bp, url_prefix="/api/auth")
    app.register_blueprint(simulation_bp, url_prefix="/api/simulation")
    original_projects_dir = ProjectManager.PROJECTS_DIR
    old_backend = Config.MEMORY_BACKEND
    old_zep_key = Config.ZEP_API_KEY
    from tempfile import TemporaryDirectory

    with TemporaryDirectory() as temp_dir:
        try:
            ProjectManager.PROJECTS_DIR = f"{temp_dir}/projects"
            with app.extensions["crowdsight_session_factory"]() as session:
                repo = IdentityRepository(session)
                org = repo.create_organization(name="Org A", slug="org-a")
                user = repo.create_user(
                    email="user-a@example.com",
                    password_hash=PasswordService.hash_password("correct horse battery staple"),
                )
                repo.create_membership(user.id, org.id, "user")
                session.add(
                    MemoryGraph(
                        id="graph-local",
                        organization_id=org.id,
                        project_id="project-local",
                    )
                )
                session.add(
                    MemoryNode(
                        id="node-local",
                        graph_id="graph-local",
                        canonical_name="Local Alice",
                        normalized_name="local alice",
                        labels=["Person"],
                        summary="Stored locally.",
                    )
                )
                session.commit()
            project = ProjectManager.create_project(
                "Local project",
                organization_id=org.id,
                owner_user_id=user.id,
            )
            project.graph_id = "graph-local"
            ProjectManager.save_project(project)

            monkeypatch.setattr(Config, "MEMORY_BACKEND", "local")
            monkeypatch.setattr(Config, "ZEP_API_KEY", None)
            client = app.test_client()
            login = client.post(
                "/api/auth/login",
                json={"email": "user-a@example.com", "password": "correct horse battery staple"},
            )
            assert login.status_code == 200
            response = client.get("/api/simulation/entities/graph-local")
            assert response.status_code == 200
            entities = response.get_json()["data"]["entities"]
            assert entities[0]["name"] == "Local Alice"
        finally:
            ProjectManager.PROJECTS_DIR = original_projects_dir
            Config.MEMORY_BACKEND = old_backend
            Config.ZEP_API_KEY = old_zep_key
            engine.dispose()