import os
from pathlib import Path

from dotenv import load_dotenv

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


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/6.0/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = os.getenv('DJANGO_SECRET_KEY', 'change-me-in-production')

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

ALLOWED_HOSTS = [
    host.strip()
    for host in os.getenv('DJANGO_ALLOWED_HOSTS', '127.0.0.1,localhost').split(',')
    if host.strip()
]

# Allow all hosts as a fallback if not explicitly set (useful during initial deployment)
if not os.getenv('DJANGO_ALLOWED_HOSTS'):
    ALLOWED_HOSTS = ['*']


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework',
    'corsheaders',
    'core',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'whitenoise.middleware.WhiteNoiseMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    'core.middleware.SetupGuardMiddleware',
    '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 = 'config.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [BASE_DIR / 'templates'],
        '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 = 'config.wsgi.application'


# Database
# https://docs.djangoproject.com/en/6.0/ref/settings/#databases

USE_MYSQL = os.getenv('DB_ENGINE', 'mysql').lower() == 'mysql'

if USE_MYSQL:
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.mysql',
            'NAME': os.getenv('DB_NAME', 'narinest_db'),
            'USER': os.getenv('DB_USER', 'root'),
            'PASSWORD': os.getenv('DB_PASSWORD', ''),
            'HOST': os.getenv('DB_HOST', '127.0.0.1'),
            'PORT': os.getenv('DB_PORT', '3306'),
            'OPTIONS': {
                'charset': 'utf8mb4',
            },
        }
    }
else:
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': BASE_DIR / 'db.sqlite3',
        }
    }


# Password validation
# https://docs.djangoproject.com/en/6.0/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/6.0/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = os.getenv('TIME_ZONE', 'UTC')

USE_I18N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/6.0/howto/static-files/

STATIC_URL = '/static/'

STATIC_ROOT = BASE_DIR / 'staticfiles'

STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

ADMIN_SITE_HEADER = 'Narinest Admin Panel'
ADMIN_SITE_TITLE = 'Narinest Admin'
ADMIN_INDEX_TITLE = 'App Control Center'

# Media (user uploads)
MEDIA_URL = '/media/'
MEDIA_ROOT = BASE_DIR / 'media'

# CORS — allow Flutter app on any origin
CORS_ALLOW_ALL_ORIGINS = True
CORS_ALLOW_CREDENTIALS = True

# DRF — default allow any; individual views enforce auth via IsAppUser
REST_FRAMEWORK = {
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.AllowAny',
    ],
    'DEFAULT_RENDERER_CLASSES': [
        'rest_framework.renderers.JSONRenderer',
    ],
}