import uuid
import pytest
from unittest.mock import patch, MagicMock
from sqlalchemy import select

from app.models.account import Account


@pytest.mark.asyncio
async def test_billing_portal_returns_url_for_account_with_stripe_customer(
    client, test_db, test_user, auth_headers, monkeypatch
):
    """Happy path: account has a stripe_customer_id and Stripe is configured →
    GET /billing/portal-session returns the portal URL."""
    from app.core.config import settings
    monkeypatch.setattr(settings, "STRIPE_SECRET_KEY", "sk_test_dummy")
    monkeypatch.setattr(settings, "FRONTEND_URL", "https://app.example.com")

    account_id = uuid.UUID(test_user["user_data"]["account_id"])
    account = (await test_db.execute(
        select(Account).where(Account.id == account_id)
    )).scalar_one()
    account.stripe_customer_id = "cus_test_456"
    await test_db.commit()

    fake_session = MagicMock()
    fake_session.url = "https://billing.stripe.com/p/session/test_abc"

    with patch(
        "stripe.billing_portal.Session.create",
        return_value=fake_session,
    ) as portal_mock:
        response = await client.get(
            "/api/v1/billing/portal-session",
            headers=auth_headers,
        )

    assert response.status_code == 200, response.json()
    assert response.json() == {"url": "https://billing.stripe.com/p/session/test_abc"}
    portal_mock.assert_called_once()
    call_kwargs = portal_mock.call_args.kwargs
    assert call_kwargs["customer"] == "cus_test_456"
    assert call_kwargs["return_url"] == "https://app.example.com/account/billing"


@pytest.mark.asyncio
async def test_billing_portal_returns_503_when_stripe_not_configured(
    client, test_db, test_user, auth_headers, monkeypatch
):
    """STRIPE_SECRET_KEY unset → settings.stripe_enabled is False → 503."""
    from app.core.config import settings
    monkeypatch.setattr(settings, "STRIPE_SECRET_KEY", None)

    response = await client.get(
        "/api/v1/billing/portal-session",
        headers=auth_headers,
    )
    assert response.status_code == 503
    assert response.json()["detail"]["error"] == "stripe_not_configured"


@pytest.mark.asyncio
async def test_billing_portal_returns_400_when_account_has_no_stripe_customer(
    client, test_db, test_user, auth_headers, monkeypatch
):
    """Account with no stripe_customer_id (never completed checkout) → 400
    with `no_stripe_customer` error."""
    from app.core.config import settings
    monkeypatch.setattr(settings, "STRIPE_SECRET_KEY", "sk_test_dummy")

    # test_user fixture seeds an account with no stripe_customer_id by default.
    account_id = uuid.UUID(test_user["user_data"]["account_id"])
    account = (await test_db.execute(
        select(Account).where(Account.id == account_id)
    )).scalar_one()
    assert account.stripe_customer_id is None

    response = await client.get(
        "/api/v1/billing/portal-session",
        headers=auth_headers,
    )
    assert response.status_code == 400
    assert response.json()["detail"]["error"] == "no_stripe_customer"