from pathlib import Path
import os
import re

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/4.1/howto/deployment/checklist/

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = os.environ.get("DEBUG", "").lower() == "true"

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = os.environ.get("SECRET_KEY")
if not DEBUG and (not SECRET_KEY or SECRET_KEY == "secret"):
    from django.core.exceptions import ImproperlyConfigured
    raise ImproperlyConfigured("SECRET_KEY environment variable is required in production (and must not be 'secret')")
if not SECRET_KEY:
    SECRET_KEY = "insecure-dev-secret-key-change-in-production"

ALLOWED_HOSTS = os.environ.get("ALLOWED_HOSTS", "*").split(",")


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    'rest_framework',
    'rest_framework.authtoken',
    'import_export',
    'push_notifications',

    'corsheaders',

    'equipment',
    'exercise',
    'registered_user',
    'workout',
    'muscle',
    'scripts',
    'video',
    'superset',
    'generator',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    "whitenoise.middleware.WhiteNoiseMiddleware",
    'corsheaders.middleware.CorsMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

if DEBUG:
    INSTALLED_APPS += ['debug_toolbar']
    MIDDLEWARE += ['debug_toolbar.middleware.DebugToolbarMiddleware']

ROOT_URLCONF = 'werkout_api.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': ['templates'],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'werkout_api.wsgi.application'


# Database
# https://docs.djangoproject.com/en/4.1/ref/settings/#databases

if os.environ.get("DATABASE_URL"):
    CSRF_TRUSTED_ORIGINS = ['https://*.werkout.fitness', 'https://*.treytartt.com']

    # Parse the DATABASE_URL env var.
    USER, PASSWORD, HOST, PORT, NAME = re.match("^postgres://(?P<username>.*?)\:(?P<password>.*?)\@(?P<host>.*?)\:(?P<port>\d+)\/(?P<db>.*?)$", os.environ.get("DATABASE_URL", "")).groups()

    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.postgresql',
            'NAME': NAME,
            'USER': USER,
            'PASSWORD': PASSWORD,
            'HOST': HOST,
            'PORT': int(PORT),
        }
    }

    CACHES = {
        "default": {
            "BACKEND": "django_redis.cache.RedisCache",
            "LOCATION": [os.environ.get('REDIS_URL', 'redis://localhost:6379')],
            "OPTIONS": {
                "CLIENT_CLASS": "django_redis.client.DefaultClient"
            },
        }
    }

    CELERY_BROKER_URL = os.environ.get("REDIS_URL", "") + "/1"
    CELERY_RESULT_BACKEND = os.environ.get("REDIS_URL", "") + "/1"

    INTERNAL_IPS = [
        "127.0.0.1",
    ]
else:
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.postgresql',
            'NAME': os.environ.get('DB_NAME', 'werkout'),
            'USER': os.environ.get('DB_USER', 'werkout'),
            'PASSWORD': os.environ.get('DB_PASSWORD', 'werkout'),
            'HOST': os.environ.get('DB_HOST', 'db'),
            'PORT': os.environ.get('DB_PORT', '5432'),
        }
    }

    CACHES = {
        "default": {
            "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
        }
    }

    CELERY_BROKER_URL = "redis://redis:6379"
    CELERY_RESULT_BACKEND = "redis://redis:6379"

    INTERNAL_IPS = [
        "127.0.0.1",
    ]


# Password validation
# https://docs.djangoproject.com/en/4.1/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/4.1/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = True

# Default primary key field type
# https://docs.djangoproject.com/en/4.1/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

STATIC_URL = 'static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'static')
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, "media")

# CORS settings
if DEBUG:
    CORS_ALLOW_ALL_ORIGINS = True
else:
    CORS_ALLOW_ALL_ORIGINS = False
    CORS_ALLOWED_ORIGINS = os.environ.get("CORS_ALLOWED_ORIGINS", "").split(",") if os.environ.get("CORS_ALLOWED_ORIGINS") else [
        'http://localhost:3000',
        'http://127.0.0.1:3000',
    ]
CORS_ALLOW_CREDENTIALS = True

# HTTPS security settings for production
if not DEBUG:
    SECURE_SSL_REDIRECT = os.environ.get("SECURE_SSL_REDIRECT", "true").lower() == "true"
    SECURE_HSTS_SECONDS = 31536000
    SECURE_HSTS_INCLUDE_SUBDOMAINS = True
    SECURE_HSTS_PRELOAD = True
    SESSION_COOKIE_SECURE = True
    CSRF_COOKIE_SECURE = True
    SECURE_PROXY_SSL_HEADER = ("HTTP_X_FORWARDED_PROTO", "https")