"""
pytest test fixtures
"""
import os
import pytest
import tempfile
from typing import Optional

from bs4 import BeautifulSoup
from flask.testing import FlaskClient
from sqlalchemy.orm.session import close_all_sessions

from amanuensis.backend import *
from amanuensis.config import AmanuensisConfig
from amanuensis.db import *
from amanuensis.server import get_app


@pytest.fixture
def db(request) -> DbContext:
    """Provides a fully-initialized ephemeral database."""
    db_fd, db_path = tempfile.mkstemp()
    db = DbContext(path=db_path, echo=False)
    db.create_all()

    def db_teardown():
        close_all_sessions()
        os.close(db_fd)
        os.unlink(db_path)

    request.addfinalizer(db_teardown)

    return db


class UserClient:
    """Class encapsulating user web operations."""

    def __init__(self, db: DbContext, user_id: int):
        self.db = db
        self.user_id = user_id

    def login(self, client: FlaskClient):
        """Log the user in."""
        user: Optional[User] = userq.try_from_id(self.db, self.user_id)
        assert user is not None

        # Set the user's password so we know what it is later
        password = os.urandom(8).hex()
        userq.password_set(self.db, user.username, password)

        # Log in
        response = client.get("/auth/login/")
        assert response.status_code == 200
        soup = BeautifulSoup(response.data, features="html.parser")
        csrf_token = soup.find(id="csrf_token")
        assert csrf_token is not None
        response = client.post(
            "/auth/login/",
            data={
                "username": user.username,
                "password": password,
                "csrf_token": csrf_token["value"],
            },
        )
        assert 300 <= response.status_code <= 399

    def logout(self, client: FlaskClient):
        """Log the user out."""
        response = client.get("/auth/logout/")
        assert 300 <= response.status_code <= 399


class ObjectFactory:
    """Factory class."""

    def __init__(self, db):
        self.db = db

    def user(self, state={"nonce": 1}, **kwargs) -> User:
        """Factory function for creating users, with valid default values."""
        default_kwargs: dict = {
            "username": f'test_user_{state["nonce"]}',
            "password": "password",
            "display_name": None,
            "email": "user@example.com",
            "is_site_admin": False,
        }
        state["nonce"] += 1
        updated_kwargs: dict = {**default_kwargs, **kwargs}
        return userq.create(self.db, **updated_kwargs)

    def lexicon(self, state={"nonce": 1}, **kwargs) -> Lexicon:
        """Factory function for creating lexicons, with valid default values."""
        default_kwargs: dict = {
            "name": f'Test_{state["nonce"]}',
            "title": None,
            "prompt": f'Test Lexicon game {state["nonce"]}',
        }
        state["nonce"] += 1
        updated_kwargs: dict = {**default_kwargs, **kwargs}
        lex = lexiq.create(self.db, **updated_kwargs)
        lex.joinable = True
        self.db.session.commit()
        return lex

    def membership(self, **kwargs) -> Membership:
        """Factory function for creating memberships, with valid default values."""
        default_kwargs: dict = {
            "is_editor": False,
        }
        updated_kwargs: dict = {**default_kwargs, **kwargs}
        return memq.create(self.db, **updated_kwargs)

    def character(self, state={"nonce": 1}, **kwargs) -> Character:
        """Factory function for creating characters, with valid default values."""
        default_kwargs: dict = {
            "name": f'Character {state["nonce"]}',
            "signature": None,
        }
        state["nonce"] += 1
        updated_kwargs: dict = {**default_kwargs, **kwargs}
        return charq.create(self.db, **updated_kwargs)

    def index(self, state={"nonce": ord("A")}, **kwargs) -> ArticleIndex:
        """Factory function for creating indices, with valid defaut values."""
        default_kwargs: dict = {
            "index_type": IndexType.CHAR,
            "pattern": chr(state["nonce"]),
            "logical_order": 0,
            "display_order": 0,
            "capacity": None,
        }
        state["nonce"] += 1
        updated_kwargs = {**default_kwargs, **kwargs}
        return indq.create(self.db, **updated_kwargs)

    def client(self, user_id: int) -> UserClient:
        """Factory function for user test clients."""
        return UserClient(self.db, user_id)


@pytest.fixture
def make(db: DbContext) -> ObjectFactory:
    """Fixture that provides a factory class."""
    return ObjectFactory(db)


@pytest.fixture
def lexicon_with_editor(make: ObjectFactory):
    """Shortcut setup for a lexicon game with an editor."""
    editor = make.user()
    assert editor
    lexicon = make.lexicon()
    assert lexicon
    membership = make.membership(
        user_id=editor.id, lexicon_id=lexicon.id, is_editor=True
    )
    assert membership
    return (lexicon, editor)


class TestConfig(AmanuensisConfig):
    TESTING = True
    SECRET_KEY = os.urandom(32).hex()


@pytest.fixture
def app(db: DbContext):
    """Provides an application running on top of the test database."""
    return get_app(TestConfig(), db)