import pytest
from fastapi.testclient import TestClient
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.pool import StaticPool
from unittest.mock import MagicMock, patch
import os
import sys

# Add backend to sys.path to resolve imports
sys.path.append(os.path.join(os.path.dirname(__file__), "../.."))

from backend.app import app, get_db, authenticate_user
from backend.database import Base

# --- Test Database Setup ---
SQLALCHEMY_DATABASE_URL = "sqlite:///:memory:"

engine = create_engine(
    SQLALCHEMY_DATABASE_URL,
    connect_args={"check_same_thread": False},
    poolclass=StaticPool,
)
TestingSessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

def override_get_db():
    try:
        db = TestingSessionLocal()
        yield db
    finally:
        db.close()

# Override Auth to bypass password check for tests
def override_authenticate_user():
    return "test_user"

app.dependency_overrides[get_db] = override_get_db
app.dependency_overrides[authenticate_user] = override_authenticate_user

@pytest.fixture(scope="module")
def client():
    # Create tables
    Base.metadata.create_all(bind=engine)
    with TestClient(app) as c:
        yield c
    # Drop tables
    Base.metadata.drop_all(bind=engine)

# --- Tests ---

def test_health_check(client):
    response = client.get("/api/health")
    assert response.status_code == 200
    assert response.json()["status"] == "ok"

@patch("backend.app.run_discovery_task") # Mock the background task function directly
def test_provision_new_company(mock_discovery_task, client):
    # Data simulating a webhook from Connector
    payload = {
        "so_contact_id": 12345,
        "so_person_id": 999,
        "crm_name": "Test Firma GmbH",
        "crm_website": "www.test-firma.de",
        "job_title": "CTO",
        "campaign_tag": "standard"
    }

    # Call the API
    response = client.post("/api/provision/superoffice-contact", json=payload)

    # Assertions
    assert response.status_code == 200
    data = response.json()
    assert data["company_name"] == "Test Firma GmbH"
    
    # Verify Background Task was triggered
    # Note: FastAPI TestClient runs background tasks synchronously by default!
    # So patching the function in app.py is the right way to intercept it.
    mock_discovery_task.assert_called()

def test_create_contact_manual(client):
    # First create a company to attach contact to
    # We can use the DB session directly or the API
    from backend.database import Company
    db = TestingSessionLocal()
    company = Company(name="Manual Corp", status="NEW")
    db.add(company)
    db.commit()
    db.refresh(company)
    company_id = company.id
    db.close()

    payload = {
        "company_id": company_id,
        "first_name": "Hans",
        "last_name": "Tester",
        "email": "hans@manual.corp",
        "job_title": "CEO",
        "role": "Wirtschaftlicher Entscheider",
        "is_primary": True
    }

    response = client.post("/api/contacts", json=payload)
    assert response.status_code == 200
    data = response.json()
    assert data["email"] == "hans@manual.corp"
    assert data["role"] == "Wirtschaftlicher Entscheider"