import os
from datetime import timedelta
from pathlib import Path

from dotenv import load_dotenv

BASE_DIR = Path(__file__).resolve().parent.parent
load_dotenv(BASE_DIR / ".env")

SECRET_KEY = os.getenv("SECRET_KEY", "dev-only-deepwatch-secret")
DEBUG = os.getenv("DEBUG", "True").lower() == "true"
ALLOWED_HOSTS = [host.strip() for host in os.getenv("ALLOWED_HOSTS", "localhost,127.0.0.1,testserver").split(",")]

INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    "corsheaders",
    "rest_framework",
    "rest_framework_simplejwt",
    "accounts",
    "reminders",
    "sessions.apps.SessionsConfig",
    "analytics",
]

MIDDLEWARE = [
    "corsheaders.middleware.CorsMiddleware",
    "django.middleware.security.SecurityMiddleware",
    "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",
]

ROOT_URLCONF = "deepwatch_backend.urls"

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

WSGI_APPLICATION = "deepwatch_backend.wsgi.application"


def database_config():
    database_url = os.getenv("DATABASE_URL", "sqlite:///db.sqlite3")
    if database_url.startswith("postgres://") or database_url.startswith("postgresql://"):
        from urllib.parse import urlparse

        url = urlparse(database_url)
        return {
            "ENGINE": "django.db.backends.postgresql",
            "NAME": url.path.lstrip("/"),
            "USER": url.username,
            "PASSWORD": url.password,
            "HOST": url.hostname,
            "PORT": url.port or 5432,
        }
    return {
        "ENGINE": "django.db.backends.sqlite3",
        "NAME": BASE_DIR / database_url.replace("sqlite:///", ""),
    }


DATABASES = {"default": database_config()}

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"
TIME_ZONE = "Africa/Lagos"
USE_I18N = True
USE_TZ = True

STATIC_URL = "static/"
DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

CORS_ALLOWED_ORIGINS = [
    origin.strip()
    for origin in os.getenv("CORS_ALLOWED_ORIGINS", "http://localhost:3000,http://127.0.0.1:3000").split(",")
    if origin.strip()
]
CORS_ALLOW_CREDENTIALS = True

REST_FRAMEWORK = {
    "DEFAULT_AUTHENTICATION_CLASSES": (
        "rest_framework_simplejwt.authentication.JWTAuthentication",
    ),
    "DEFAULT_PERMISSION_CLASSES": ("rest_framework.permissions.IsAuthenticated",),
}

SIMPLE_JWT = {
    "ACCESS_TOKEN_LIFETIME": timedelta(minutes=60),
    "REFRESH_TOKEN_LIFETIME": timedelta(days=7),
    "AUTH_HEADER_TYPES": ("Bearer",),
}