"""Integration tests for reminder preferences."""

from flask import url_for


def get_csrf_token(client, url):
    """Extract CSRF token from a page.

    Args:
        client: Flask test client.
        url: URL to fetch the CSRF token from.

    Returns:
        CSRF token string.
    """
    response = client.get(url)
    # Extract CSRF token from the form
    data = response.data.decode()
    start = data.find('name="csrf_token" value="') + len('name="csrf_token" value="')
    end = data.find('"', start)
    return data[start:end]


def test_dashboard_shows_reminder_preference_form(client, auth_participant):
    """Test that dashboard shows reminder preference form."""
    response = client.get(
        url_for("participant.dashboard", id=auth_participant.exchange_id)
    )

    assert response.status_code == 200
    assert b"Email Reminders" in response.data or b"Send me reminders" in response.data


def test_update_preferences_enable(client, auth_participant, db):
    """Enable reminder emails."""
    auth_participant.reminder_enabled = False
    db.session.commit()

    csrf_token = get_csrf_token(
        client, url_for("participant.dashboard", id=auth_participant.exchange_id)
    )

    response = client.post(
        url_for("participant.update_preferences"),
        data={"reminder_enabled": True, "csrf_token": csrf_token},
        follow_redirects=True,
    )

    assert response.status_code == 200
    assert b"Reminder emails enabled" in response.data

    db.session.refresh(auth_participant)
    assert auth_participant.reminder_enabled is True


def test_update_preferences_disable(client, auth_participant, db):
    """Disable reminder emails."""
    auth_participant.reminder_enabled = True
    db.session.commit()

    csrf_token = get_csrf_token(
        client, url_for("participant.dashboard", id=auth_participant.exchange_id)
    )

    response = client.post(
        url_for("participant.update_preferences"),
        data={"csrf_token": csrf_token},
        follow_redirects=True,
    )

    assert response.status_code == 200
    assert b"Reminder emails disabled" in response.data

    db.session.refresh(auth_participant)
    assert auth_participant.reminder_enabled is False


def test_update_preferences_requires_login(client):
    """Test that update_preferences requires login."""
    response = client.post(url_for("participant.update_preferences"))

    # Should redirect to login or show error
    assert response.status_code in [302, 401, 403]