import pytest
from sqlalchemy import text

from web.app import app
from web.db import (
    db_init,
    create_or_update_user,
    subscribe_email,
    list_email_subscriptions,
    _ensure_session,
)


@pytest.fixture(scope="function", autouse=True)
def initialize_app():
    app.config.update(TESTING=True, WTF_CSRF_ENABLED=False)
    with app.app_context():
        db_init()
        create_or_update_user("admin", password="secret",
                              is_admin=True, is_active=True)
    # Clear subscriptions before and after each test to avoid leakage
    with _ensure_session() as session:
        session.execute(text("DELETE FROM email_subscriptions"))
        session.commit()
    yield
    with _ensure_session() as session:
        session.execute(text("DELETE FROM email_subscriptions"))
        session.commit()


@pytest.fixture
def client():
    with app.test_client() as test_client:
        with test_client.session_transaction() as sess:
            sess["username"] = "admin"
        yield test_client


@pytest.fixture
def anon_client():
    with app.test_client() as test_client:
        # Ensure no admin session present
        with test_client.session_transaction() as sess:
            sess.pop("username", None)
        yield test_client


def test_admin_emails_requires_admin(anon_client):
    response = anon_client.get("/admin/emails")
    assert response.status_code == 302
    assert "/login" in response.headers.get("Location", "")


def test_admin_emails_lists_subscriptions(client):
    subscribe_email("alice@example.com")
    response = client.get("/admin/emails")
    assert response.status_code == 200
    assert b"alice@example.com" in response.data


def test_admin_emails_can_subscribe(client):
    response = client.post(
        "/admin/emails",
        data={"action": "subscribe", "email": "bob@example.com"},
        follow_redirects=False,
    )
    assert response.status_code == 302
    emails = list_email_subscriptions()
    assert any(sub["email"] == "bob@example.com" and sub["is_active"]
               for sub in emails)


def test_admin_emails_can_unsubscribe(client):
    subscribe_email("carol@example.com")
    response = client.post(
        "/admin/emails",
        data={"action": "unsubscribe", "email": "carol@example.com"},
        follow_redirects=False,
    )
    assert response.status_code == 302
    emails = list_email_subscriptions()
    matching = [sub for sub in emails if sub["email"] == "carol@example.com"]
    assert matching
    assert matching[0]["is_active"] is False