import os
import pytest
from unittest.mock import patch, MagicMock
from fastapi.testclient import TestClient
from app.main import app

client = TestClient(app)

# Skip all tests in this module if Stripe secret key is not set
STRIPE_SECRET_KEY = os.getenv("STRIPE_SECRET_KEY")
if not STRIPE_SECRET_KEY:
    pytest.skip(
        "Stripe not configured – skipping payment tests",
        allow_module_level=True)


@pytest.fixture
def mock_stripe():
    with patch("stripe.checkout.Session.create") as mock:
        yield mock


def test_create_checkout_session_missing_stripe_key(monkeypatch):
    monkeypatch.setenv("STRIPE_SECRET_KEY", "")
    response = client.post(
        "/api/v1/payments/create-checkout-session",
        json={
            "api_key": "test_key",
            "success_url": "https://example.com/success",
            "cancel_url": "https://example.com/cancel"})
    assert response.status_code == 500
    assert "Stripe not configured" in response.json()["detail"]


def test_create_checkout_session_free_key(mock_stripe):
    # Mock tracker.get_tier to return Tier.FREE
    with patch("app.core.usage_tracker.tracker") as mock_tracker:
        mock_tracker.get_tier.return_value = "free"
        mock_stripe.return_value = MagicMock(
            id="cs_test_123", url="https://checkout.stripe.com/pay")
        response = client.post(
            "/api/v1/payments/create-checkout-session",
            json={
                "api_key": "test_key",
                "success_url": "https://example.com/success",
                "cancel_url": "https://example.com/cancel"})
        assert response.status_code == 200
        data = response.json()
        assert "sessionId" in data
        assert "url" in data


def test_create_checkout_session_pro_key():
    with patch("app.core.usage_tracker.tracker") as mock_tracker:
        mock_tracker.get_tier.return_value = "pro"
        response = client.post(
            "/api/v1/payments/create-checkout-session",
            json={
                "api_key": "test_key",
                "success_url": "https://example.com/success",
                "cancel_url": "https://example.com/cancel"})
        assert response.status_code == 400
        assert "Only free tier keys can be upgraded" in response.json()[
            "detail"]