"""Base settings shared across environments."""

from pathlib import Path
from datetime import timedelta
import os

# Two levels up from this file: backend/ directory
BASE_DIR = Path(__file__).resolve().parent.parent

# Keep secrets in environment variables; override in env-specific files.
SECRET_KEY = os.getenv("DJANGO_SECRET_KEY", "replace-me")
DEBUG = False

ALLOWED_HOSTS: list[str] = []

INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    # Third-party
    "rest_framework",
    "drf_spectacular",
    "drf_spectacular_sidecar",
    "rest_framework_simplejwt",
    "corsheaders",
    "django_extensions",
    # Packages
    "django_wallet_utils",
    # Local apps
    "apps.users",
    "apps.investments",
    "apps.referrals",
    "apps.transactions",
    "apps.payments",
    "django_cronjob_utils",
]

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

ROOT_URLCONF = "config.urls"

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        "DIRS": [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 = "config.wsgi.application"
ASGI_APPLICATION = "config.asgi.application"

# Database settings are provided in the environment-specific modules.
DATABASES: dict = {}

AUTH_USER_MODEL = "users.User"

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"},
]

LANGUAGE_CODE = "en-us"
# Timezone: UTC+8 (Asia/Kuala_Lumpur)
# Using Asia/Kuala_Lumpur instead of UTC+8 offset because:
# - Django TIME_ZONE requires IANA timezone database names
# - Asia/Kuala_Lumpur is UTC+8 and doesn't observe DST (same as fixed UTC+8)
# - Provides proper timezone context for date/time operations
TIME_ZONE = "Asia/Kuala_Lumpur"
USE_I18N = True
USE_TZ = True

STATIC_URL = "static/"
STATIC_ROOT = BASE_DIR / "staticfiles"
MEDIA_URL = "media/"
MEDIA_ROOT = BASE_DIR / "media"

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

REST_FRAMEWORK = {
    "DEFAULT_AUTHENTICATION_CLASSES": (
        "rest_framework_simplejwt.authentication.JWTAuthentication",
    ),
    "DEFAULT_PERMISSION_CLASSES": (
        "rest_framework.permissions.IsAuthenticated",
    ),
    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.PageNumberPagination",
    "PAGE_SIZE": 20,
    "DEFAULT_SCHEMA_CLASS": "drf_spectacular.openapi.AutoSchema",
}

SIMPLE_JWT = {
    "ACCESS_TOKEN_LIFETIME": timedelta(hours=1),
    "REFRESH_TOKEN_LIFETIME": timedelta(days=30),
    "ROTATE_REFRESH_TOKENS": False,
    "BLACKLIST_AFTER_ROTATION": True,
    "ALGORITHM": "HS256",
    "AUTH_HEADER_TYPES": ("Bearer",),
}

# Telegram bot configuration placeholders; override with real tokens via env vars.
TELEGRAM_BOT_TOKEN = os.getenv("TELEGRAM_BOT_TOKEN", "")
TELEGRAM_WEBHOOK_SECRET = os.getenv("TELEGRAM_WEBHOOK_SECRET", "")
TELEGRAM_WEBAPP_URL = os.getenv("TELEGRAM_WEBAPP_URL", "")
ENABLE_DEV_TELEGRAM_AUTH = os.getenv("ENABLE_DEV_TELEGRAM_AUTH", "false").lower() == "true"

SPECTACULAR_SETTINGS = {
    "TITLE": "Telegram Earn API",
    "DESCRIPTION": "OpenAPI schema for the Telegram Earn backend. "
    "Includes auth, investments, referrals, transactions, and payments.",
    "VERSION": "0.1.0",
    "SERVE_INCLUDE_SCHEMA": False,
    "SERVE_PERMISSIONS": ["rest_framework.permissions.AllowAny"],
}