from pathlib import Path
import os
from dotenv import load_dotenv





BASE_DIR = Path(__file__).resolve().parent.parent

# ======================================================
# BRAND / LETTERHEAD CONSTANTS (used by Staff PDF exports)
# You can override any of these via environment variables.
# ======================================================
# Explicit selection wins. Direct VS Code commands use the local file when
# available and no production .env is present. Never generate production secrets.
_env_file = os.getenv("TELEHEALTH_ENV_FILE", "").strip()
if _env_file:
    load_dotenv(Path(_env_file), override=False)
elif os.getenv("TELEHEALTH_LOCAL_DEV", "").lower() in {"1", "true"}:
    load_dotenv(BASE_DIR / ".env.local", override=False)
elif (BASE_DIR / ".env").exists():
    load_dotenv(BASE_DIR / ".env", override=False)
elif (BASE_DIR / ".env.local").exists():
    load_dotenv(BASE_DIR / ".env.local", override=False)
SITE_NAME = os.getenv("SITE_NAME", "Telehealthscare Services")
SITE_SHORT = os.getenv("SITE_SHORT", "Telehealthscare")
SITE_PHONE = os.getenv("SITE_PHONE", "+234 813 378 2079")
SITE_EMAIL = os.getenv("SITE_EMAIL", "holisticcaregiverservicesltd@gmail.com")
SITE_ADDRESS = os.getenv("SITE_ADDRESS", "")
SITE_WATERMARK = os.getenv("SITE_WATERMARK", SITE_SHORT)
# -----------------------------------------------------------------------------
# SECURITY (Windows-friendly .env optional)
# -----------------------------------------------------------------------------
# Accept common .env boolean spellings; local mode is explicitly opt-in.
def _env_true(name, default="0"):
    return os.getenv(name, default).strip().lower() in {"1", "true", "yes", "on"}

DEBUG = _env_true("DJANGO_DEBUG")
SECRET_KEY = os.getenv("DJANGO_SECRET_KEY", "").strip()
if not SECRET_KEY:
    if DEBUG and _env_true("TELEHEALTH_LOCAL_DEV"):
        # Never use this fallback in production. Local launcher supplies a unique key.
        SECRET_KEY = "local-only-unsafe-fallback-change-me"
    else:
        raise RuntimeError("DJANGO_SECRET_KEY is missing. Run START_LOCAL_WINDOWS.bat for local setup or set a strong private production secret.")
ALLOWED_HOSTS = [h.strip() for h in os.getenv("DJANGO_ALLOWED_HOSTS", "127.0.0.1,localhost").split(",") if h.strip()]

# -----------------------------------------------------------------------------
# APPS
# -----------------------------------------------------------------------------
INSTALLED_APPS = [
    
    'channels',
    # Daphne removed from cPanel WSGI installed apps; ASGI requires separate hosting.
"django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    "website",
    "emr.apps.EmrConfig",
]

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",
    "website.staff_access.StaffPortalAccessMiddleware",
    "emr.middleware.CurrentRequestMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
]

ROOT_URLCONF = "config.urls"

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        "DIRS": [BASE_DIR / "website" / "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",
                "website.context_processors.site_settings",
            ],
        },
    },
]

WSGI_APPLICATION = "config.wsgi.application"

# Production security: enable HTTPS flags only after SSL is installed.
CSRF_TRUSTED_ORIGINS = [v.strip() for v in os.getenv("DJANGO_CSRF_TRUSTED_ORIGINS", "").split(",") if v.strip()]
SECURE_SSL_REDIRECT = not DEBUG and os.getenv("DJANGO_SECURE_SSL_REDIRECT", "0") == "1"
SESSION_COOKIE_SECURE = not DEBUG
CSRF_COOKIE_SECURE = not DEBUG
SECURE_CONTENT_TYPE_NOSNIFF = True
SECURE_REFERRER_POLICY = "strict-origin-when-cross-origin"
SECURE_HSTS_SECONDS = int(os.getenv("DJANGO_SECURE_HSTS_SECONDS", "0")) if not DEBUG else 0
SECURE_HSTS_INCLUDE_SUBDOMAINS = False
SECURE_HSTS_PRELOAD = False
# Only enable when the trusted host's reverse proxy sets this header correctly.
if os.getenv("DJANGO_TRUST_PROXY_HTTPS", "0") == "1":
    SECURE_PROXY_SSL_HEADER = ("HTTP_X_FORWARDED_PROTO", "https")


# -----------------------------------------------------------------------------
# DATABASE (Default SQLite; can switch to MySQL later)
# -----------------------------------------------------------------------------
DATABASES = {
    "default": {
        "ENGINE": ("django.db.backends.mysql" if os.getenv("DB_ENGINE", "django.db.backends.sqlite3").strip().lower() in {"mysql", "mysql.connector", "django.db.backends.mysql"} else os.getenv("DB_ENGINE", "django.db.backends.sqlite3").strip()),
        "NAME": (str(BASE_DIR / os.getenv("DB_NAME", "db.sqlite3")) if os.getenv("DB_ENGINE", "django.db.backends.sqlite3").strip().lower() in {"sqlite", "sqlite3", "django.db.backends.sqlite3"} and not Path(os.getenv("DB_NAME", "db.sqlite3")).is_absolute() else os.getenv("DB_NAME", str(BASE_DIR / "db.sqlite3"))),
        "USER": os.getenv("DB_USER", ""),
        "PASSWORD": os.getenv("DB_PASSWORD", ""),
        "HOST": os.getenv("DB_HOST", ""),
        "PORT": os.getenv("DB_PORT", ""),
    }
}

# -----------------------------------------------------------------------------
# PASSWORDS
# -----------------------------------------------------------------------------
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"},
]

# -----------------------------------------------------------------------------
# I18N
# -----------------------------------------------------------------------------
LANGUAGE_CODE = "en-us"
TIME_ZONE = "Africa/Lagos"
USE_I18N = True
USE_TZ = True

# -----------------------------------------------------------------------------
# STATIC/MEDIA
# -----------------------------------------------------------------------------

# -----------------------------------------------------------------------------
# STATIC / MEDIA
# -----------------------------------------------------------------------------
STORAGES = {
    "default": {"BACKEND": "django.core.files.storage.FileSystemStorage"},
    "staticfiles": {"BACKEND": "whitenoise.storage.CompressedManifestStaticFilesStorage"},
}

STATIC_URL = "/static/"
STATICFILES_DIRS = [BASE_DIR / "website" / "static"]
STATIC_ROOT = BASE_DIR / "staticfiles"

MEDIA_URL = "/media/"
MEDIA_ROOT = BASE_DIR / "media"

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

# STATICFILES_STORAGE = "whitenoise.storage.CompressedManifestStaticFilesStorage"


# -----------------------------------------------------------------------------
# EMAIL (Console by default; set SMTP env vars for production)
# -----------------------------------------------------------------------------
EMAIL_BACKEND = os.getenv(
    "EMAIL_BACKEND",
    "django.core.mail.backends.smtp.EmailBackend" if os.getenv("EMAIL_HOST") else "django.core.mail.backends.console.EmailBackend",
)
DEFAULT_FROM_EMAIL = os.getenv("DEFAULT_FROM_EMAIL", "no-reply@holisticcaregiverservicesltd.com")
ADMIN_NOTIFY_EMAIL = os.getenv("ADMIN_NOTIFY_EMAIL", "holisticcaregiverservicesltd@gmail.com")


# -----------------------------------------------------------------------------
# WhatsApp Business (Meta Cloud API) - Optional
# -----------------------------------------------------------------------------
WHATSAPP_CLOUD_TOKEN = os.getenv("WHATSAPP_CLOUD_TOKEN", "")
WHATSAPP_PHONE_NUMBER_ID = os.getenv("WHATSAPP_PHONE_NUMBER_ID", "")
WHATSAPP_VERIFY_TOKEN = os.getenv("WHATSAPP_VERIFY_TOKEN", "change-me")
WHATSAPP_DEFAULT_ROUTE = os.getenv("WHATSAPP_DEFAULT_ROUTE", os.getenv("SITE_WHATSAPP", "+2349042510114"))

# Comma-separated: enquiry_type=+234..., enquiry_type2=+234...
WHATSAPP_ROUTING_RULES = os.getenv("WHATSAPP_ROUTING_RULES", "")
# Support SLA
SUPPORT_SLA_MINUTES = int(os.getenv('SUPPORT_SLA_MINUTES', '15') or '15')
WHATSAPP_SUPPORT_ROUTE = os.getenv('WHATSAPP_SUPPORT_ROUTE', os.getenv('WHATSAPP_DEFAULT_ROUTE', ''))

# Public base URL for building links in WhatsApp messages (e.g. https://holisticcaregiverservices.com)
SITE_BASE_URL = os.getenv('SITE_BASE_URL', '')

# SMTP settings (set in .env)
EMAIL_HOST = os.getenv("EMAIL_HOST", "")
EMAIL_PORT = int(os.getenv("EMAIL_PORT", "587"))
EMAIL_HOST_USER = os.getenv("EMAIL_HOST_USER", "")
EMAIL_HOST_PASSWORD = os.getenv("EMAIL_HOST_PASSWORD", "")
EMAIL_USE_TLS = os.getenv("EMAIL_USE_TLS", "1") == "1"

# Paystack
PAYSTACK_PUBLIC_KEY = os.getenv("PAYSTACK_PUBLIC_KEY", "")
PAYSTACK_SECRET_KEY = os.getenv("PAYSTACK_SECRET_KEY", "")
PAYSTACK_TELEHEALTH_FEE_NGN = int(os.getenv("PAYSTACK_TELEHEALTH_FEE_NGN", "0"))
PAYSTACK_CARE_REQUEST_FEE_NGN = int(os.getenv("PAYSTACK_CARE_REQUEST_FEE_NGN", "0"))

# Channels / WebSocket
ASGI_APPLICATION = 'config.asgi.application'
import os as _os
REDIS_URL = _os.getenv("REDIS_URL", "").strip()
if REDIS_URL:
    CHANNEL_LAYERS = {
        "default": {
            "BACKEND": "channels_redis.core.RedisChannelLayer",
            "CONFIG": {"hosts": [REDIS_URL]},
        }
    }
else:
    CHANNEL_LAYERS = {"default": {"BACKEND": "channels.layers.InMemoryChannelLayer"}}

# SLA Timers (minutes)
SLA_SUPPORT_MINS = int(os.getenv('SLA_SUPPORT_MINS', '60'))
SLA_CARE_MINS = int(os.getenv('SLA_CARE_MINS', '120'))

# Dedicated operational staff sign-in (Django admin remains separate).
LOGIN_URL = "website:staff_login"
