"""Shared pytest fixtures for the Team Tryouts test suite.

The application factory is driven entirely through the ``config`` argument
here: no environment variable is required to run the suite, no database
server is needed, and the Discord bot never starts.
"""

import os
import sys
import tempfile

import pytest

# Make the project root importable as the 'app' package.
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from app.app import create_app  # noqa: E402
from app.extensions import db as _db  # noqa: E402
from app.models import Admin, Coach, Manager, Player, Scout  # noqa: E402


ROLE_CLASSES = {
    'admin': Admin,
    'manager': Manager,
    'coach': Coach,
    'player': Player,
    'scout': Scout,
}

#: Satisfies the documented policy (8+ chars, upper, lower, digit).
VALID_PASSWORD = 'Password123'


def _base_config(db_path, csrf=False):
    return {
        'SECRET_KEY': 'test-secret-not-used-anywhere-real',
        'SQLALCHEMY_DATABASE_URI': f'sqlite:///{db_path}',
        'TESTING': True,
        'WTF_CSRF_ENABLED': csrf,
        # Without these three the suite would 301 every request, start a
        # Discord bot, and refuse to issue cookies over the test client.
        'FORCE_HTTPS': False,
        'SESSION_COOKIE_SECURE': False,
        'ENABLE_DISCORD_BOT': False,
        # The schema still comes from create_all() until Alembic lands (DB-002).
        'AUTO_CREATE_TABLES': True,
        'CORS_ALLOWED_ORIGINS': '',
        'RATELIMIT_ENABLED': False,
    }


@pytest.fixture
def app():
    """A fully configured application backed by a throwaway SQLite file.

    A file rather than :memory: because Flask-SQLAlchemy hands out a
    connection per thread, and an in-memory database is not shared between
    them — tables created on one connection would be invisible to the next.
    """
    fd, db_path = tempfile.mkstemp(suffix='.sqlite')
    os.close(fd)

    application = create_app(_base_config(db_path))

    yield application

    with application.app_context():
        _db.session.remove()
        _db.engine.dispose()
    try:
        os.unlink(db_path)
    except OSError:
        pass


@pytest.fixture
def app_with_csrf():
    """Same application, with CSRF protection left switched on."""
    fd, db_path = tempfile.mkstemp(suffix='.sqlite')
    os.close(fd)

    application = create_app(_base_config(db_path, csrf=True))

    yield application

    with application.app_context():
        _db.session.remove()
        _db.engine.dispose()
    try:
        os.unlink(db_path)
    except OSError:
        pass


@pytest.fixture
def client(app):
    return app.test_client()


@pytest.fixture
def db(app):
    """Database handle bound to an active application context."""
    with app.app_context():
        yield _db


@pytest.fixture
def make_user(app):
    """Factory creating a user of a given role and returning its id.

    Returns the primary key rather than the instance: the object would be
    detached once the fixture's application context is popped, and every
    caller wants to look it up inside its own context anyway.
    """
    counter = {'n': 0}

    def _make(role='player', password=VALID_PASSWORD, **kwargs):
        from app.extensions import hash_password

        counter['n'] += 1
        n = counter['n']
        cls = ROLE_CLASSES[role]
        with app.app_context():
            user = cls(
                username=kwargs.pop('username', f'{role}{n}'),
                password_hash=hash_password(password),
                role=role,
                full_name=kwargs.pop('full_name', f'{role.title()} {n}'),
                email=kwargs.pop('email', f'{role}{n}@example.test'),
                **kwargs,
            )
            _db.session.add(user)
            _db.session.commit()
            return user.id

    return _make


@pytest.fixture
def login(client):
    """Log a user in through the real login form.

    Deliberately exercises the actual authentication path rather than
    poking flask_login's session key, so that session handling itself
    stays under test.
    """

    def _login(username, password=VALID_PASSWORD):
        return client.post(
            '/auth/login',
            data={'username': username, 'password': password},
            follow_redirects=False,
        )

    return _login


@pytest.fixture
def as_role(app, client, make_user, login):
    """Create a user of the given role, log in, and return its id."""

    def _as(role='player', **kwargs):
        user_id = make_user(role, **kwargs)
        with app.app_context():
            from app.models import User
            username = _db.session.get(User, user_id).username
        response = login(username)
        assert response.status_code in (301, 302), (
            f'login for {username} did not redirect: {response.status_code}'
        )
        return user_id

    return _as