import os
from typing import Type, Union

from dramatiq.brokers.redis import RedisBroker
from dramatiq.brokers.stub import StubBroker
from flask import current_app
from sqlalchemy.pool import NullPool

broker: Union[Type['RedisBroker'], Type['StubBroker']] = (
    StubBroker
    if os.getenv("APP_SETTINGS") == "fittrackee.config.TestingConfig"
    else RedisBroker
)

XDIST_WORKER = (
    f"_{os.getenv('PYTEST_XDIST_WORKER')}"
    if os.getenv('PYTEST_XDIST_WORKER')
    else ''
)


class BaseConfig:
    DEBUG = False
    TESTING = False
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    BCRYPT_LOG_ROUNDS = 13
    TOKEN_EXPIRATION_DAYS = 30
    TOKEN_EXPIRATION_SECONDS = 0
    PASSWORD_TOKEN_EXPIRATION_SECONDS = 3600
    UPLOAD_FOLDER = os.path.join(
        os.getenv('UPLOAD_FOLDER', current_app.root_path), 'uploads'
    )
    PICTURE_ALLOWED_EXTENSIONS = {'jpg', 'png', 'gif'}
    WORKOUT_ALLOWED_EXTENSIONS = {'gpx', 'zip'}
    TEMPLATES_FOLDER = os.path.join(current_app.root_path, 'emails/templates')
    UI_URL = os.environ.get('UI_URL')
    EMAIL_URL = os.environ.get('EMAIL_URL')
    SENDER_EMAIL = os.environ.get('SENDER_EMAIL')
    CAN_SEND_EMAILS = False
    DRAMATIQ_BROKER = broker
    TILE_SERVER = {
        'URL': os.environ.get(
            'TILE_SERVER_URL',
            'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
        ),
        'ATTRIBUTION': os.environ.get(
            'MAP_ATTRIBUTION',
            '&copy; <a href="http://www.openstreetmap.org/copyright" '
            'target="_blank" rel="noopener noreferrer">OpenStreetMap</a>'
            ' contributors',
        ),
        'DEFAULT_STATICMAP': (
            os.environ.get('DEFAULT_STATICMAP', 'false').lower() == 'true'
        ),
        'STATICMAP_SUBDOMAINS': os.environ.get('STATICMAP_SUBDOMAINS', ''),
    }
    TRANSLATIONS_FOLDER = os.path.join(
        current_app.root_path, 'emails/translations'
    )
    LANGUAGES = [
        'en',
        'fr',
        'de',
        'it',
        'nb',
        'nl',
        'es',
        'gl',
        'pl',
    ]
    OAUTH2_TOKEN_EXPIRES_IN = {
        'authorization_code': 864000,  # 10 days
        'refresh_token': 864000,  # 10 days
    }
    OAUTH2_REFRESH_TOKEN_GENERATOR = True
    DATA_EXPORT_EXPIRATION = 24  # hours


class DevelopmentConfig(BaseConfig):
    DEBUG = True
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL')
    SECRET_KEY = 'development key'  # nosec
    BCRYPT_LOG_ROUNDS = 4
    DRAMATIQ_BROKER_URL = os.getenv('REDIS_URL', 'redis://')


class TestingConfig(BaseConfig):
    DEBUG = True
    TESTING = True
    SQLALCHEMY_DATABASE_URI = (
        os.environ.get('DATABASE_TEST_URL', '') + XDIST_WORKER
    )
    UPLOAD_FOLDER = os.path.join(
        os.getenv('UPLOAD_FOLDER', current_app.root_path),
        'uploads' + XDIST_WORKER,
    )
    SECRET_KEY = 'test key'  # nosec
    BCRYPT_LOG_ROUNDS = 4
    TOKEN_EXPIRATION_DAYS = 0
    TOKEN_EXPIRATION_SECONDS = 60
    PASSWORD_TOKEN_EXPIRATION_SECONDS = 60
    UI_URL = 'http://0.0.0.0:5000'
    SENDER_EMAIL = 'fittrackee@example.com'
    OAUTH2_TOKEN_EXPIRES_IN = {
        'authorization_code': 60,
        'refresh_token': 60,
    }


class End2EndTestingConfig(TestingConfig):
    DRAMATIQ_BROKER_URL = os.getenv('REDIS_URL', 'redis://')


class ProductionConfig(BaseConfig):
    DEBUG = False
    # https://docs.sqlalchemy.org/en/13/core/pooling.html#using-connection-pools-with-multiprocessing-or-os-fork  # noqa
    SQLALCHEMY_ENGINE_OPTIONS = (
        {'poolclass': NullPool}
        if os.getenv('DATABASE_DISABLE_POOLING', 'False') == 'True'
        else {}
    )
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL')
    SECRET_KEY = os.getenv('APP_SECRET_KEY')
    DRAMATIQ_BROKER_URL = os.getenv('REDIS_URL', 'redis://')