# dashboard_project/settings.py

import logging
import os
from pathlib import Path

from django.core.management.utils import get_random_secret_key

# Load environment variables from .env file if present
try:
    from dotenv import load_dotenv

    load_dotenv()
except ImportError:
    pass

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

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = os.environ.get("DJANGO_SECRET_KEY", get_random_secret_key())

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

ALLOWED_HOSTS = []

# Application definition
INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    "django.contrib.sites",
    # Third-party apps
    "allauth",
    "allauth.account",
    "allauth.socialaccount",
    "crispy_forms",
    "crispy_bootstrap5",
    "django_celery_beat",
    # Custom apps
    "dashboard.apps.DashboardConfig",
    "accounts.apps.AccountsConfig",
    "data_integration",
]

MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "whitenoise.middleware.WhiteNoiseMiddleware",
    "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",
    "allauth.account.middleware.AccountMiddleware",
]

ROOT_URLCONF = "dashboard_project.urls"

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        "DIRS": [os.path.join(BASE_DIR, "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 = "dashboard_project.wsgi.application"

# Database
DATABASES = {
    "default": {
        "ENGINE": "django.db.backends.sqlite3",
        "NAME": BASE_DIR / "db.sqlite3",
    }
}

# Password validation
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
LANGUAGE_CODE = "en-US"
TIME_ZONE = "Europe/Amsterdam"
USE_I18N = True
USE_TZ = True

# Static files (CSS, JavaScript, Images)
STATIC_URL = "static/"
STATICFILES_DIRS = [
    os.path.join(BASE_DIR, "static"),
]
STATIC_ROOT = os.path.join(BASE_DIR, "staticfiles")
STORAGES = {
    "default": {
        "BACKEND": "django.core.files.storage.FileSystemStorage",
    },
    "staticfiles": {
        "BACKEND": "whitenoise.storage.CompressedManifestStaticFilesStorage",
    },
}

# Media files
MEDIA_URL = "/media/"
MEDIA_ROOT = os.path.join(BASE_DIR, "media")

# Default primary key field type
DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

# Crispy Forms
CRISPY_ALLOWED_TEMPLATE_PACKS = "bootstrap5"
CRISPY_TEMPLATE_PACK = "bootstrap5"

# Authentication
AUTH_USER_MODEL = "accounts.CustomUser"
LOGIN_REDIRECT_URL = "dashboard"
LOGOUT_REDIRECT_URL = "login"
ACCOUNT_LOGOUT_ON_GET = True

# django-allauth
AUTHENTICATION_BACKENDS = [
    "django.contrib.auth.backends.ModelBackend",
    "allauth.account.auth_backends.AuthenticationBackend",
]
SITE_ID = 1
ACCOUNT_EMAIL_VERIFICATION = "none"

# Celery Configuration
# Check if Redis is available
try:
    import redis

    redis_client = redis.Redis(
        host=os.environ.get("REDIS_HOST", "localhost"),
        port=int(os.environ.get("REDIS_PORT", 6379)),
        db=int(os.environ.get("REDIS_DB", 0)),
        socket_connect_timeout=2,  # 2 seconds timeout
    )
    redis_client.ping()
    # Redis is available, use it
    CELERY_BROKER_URL = os.environ.get("CELERY_BROKER_URL", "redis://localhost:6379/0")
    CELERY_RESULT_BACKEND = os.environ.get("CELERY_RESULT_BACKEND", "redis://localhost:6379/0")
    logger = logging.getLogger(__name__)
    logger.info("Using Redis for Celery broker and result backend")
except (
    ImportError,
    redis.exceptions.ConnectionError,
    redis.exceptions.TimeoutError,
) as e:
    # Redis is not available, use SQLite as fallback (works for development)
    CELERY_BROKER_URL = os.environ.get("CELERY_BROKER_URL", "sqla+sqlite:///celery.sqlite")
    CELERY_RESULT_BACKEND = os.environ.get("CELERY_RESULT_BACKEND", "db+sqlite:///results.sqlite")
    logger = logging.getLogger(__name__)
    logger.warning(f"Redis connection failed: {str(e)}. Using SQLite for Celery.")

CELERY_ACCEPT_CONTENT = ["json"]
CELERY_TASK_SERIALIZER = "json"
CELERY_RESULT_SERIALIZER = "json"
CELERY_TIMEZONE = TIME_ZONE
CELERY_BEAT_SCHEDULER = "django_celery_beat.schedulers:DatabaseScheduler"

# Get schedule from environment variables or use defaults
CHAT_DATA_FETCH_INTERVAL = int(os.environ.get("CHAT_DATA_FETCH_INTERVAL", 3600))  # Default: 1 hour

CELERY_BEAT_SCHEDULE = {
    "fetch_chat_data_periodic": {
        "task": "data_integration.tasks.periodic_fetch_chat_data",
        "schedule": CHAT_DATA_FETCH_INTERVAL,
        "options": {
            "expires": CHAT_DATA_FETCH_INTERVAL - 10,  # 10 seconds before next run
        },
    },
}