"""
Django settings for Optimus Infinity Admin Portal.
"""

import os
from pathlib import Path
from datetime import timedelta
from dotenv import load_dotenv

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

# Load .env file if present
load_dotenv(BASE_DIR / '.env')

SECRET_KEY = os.environ.get('SECRET_KEY', 'django-insecure-h+bumt913v%i)h7i&2o*6hpfl2%g@)@g2rwm75^r!*_w-0ay4x')

DEBUG = os.environ.get('DEBUG', 'False').lower() in ('true', '1', 't')

# Allowed hosts configuration
ALLOWED_HOSTS_ENV = os.environ.get('ALLOWED_HOSTS')
if ALLOWED_HOSTS_ENV:
    ALLOWED_HOSTS = [h.strip() for h in ALLOWED_HOSTS_ENV.split(',') if h.strip()]
else:
    ALLOWED_HOSTS = [
        'api.optimusinfinity.samsonandassociates.in',
        'optimusinfinity.samsonandassociates.in',
        'localhost',
        '127.0.0.1',
        '*',
    ]

# Application definition
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    # Third party
    'rest_framework',
    'corsheaders',
    # Project apps
    'apps.core',
    'apps.accounts',
    'apps.admin_portal',
    'apps.member_portal',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    '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': [],
        '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 Configuration (PostgreSQL by default for cPanel, SQLite fallback if USE_SQLITE=True)
USE_SQLITE = os.environ.get('USE_SQLITE', 'False').lower() in ('true', '1', 't')

if USE_SQLITE:
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': BASE_DIR / 'db.sqlite3',
        }
    }
else:
    DATABASES = {
        'default': {
            'ENGINE': os.environ.get('DB_ENGINE', 'django.db.backends.postgresql'),
            'NAME': os.environ.get('DB_NAME', 'samsonandassocia_optimusdb'),
            'USER': os.environ.get('DB_USER', 'samsonandassocia_optimususer'),
            'PASSWORD': os.environ.get('DB_PASSWORD', ''),
            'HOST': os.environ.get('DB_HOST', 'localhost'),
            'PORT': os.environ.get('DB_PORT', '5432'),
        }
    }

# Custom User Model
AUTH_USER_MODEL = 'core.User'

# 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 — IST
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'Asia/Kolkata'
USE_I18N = True
USE_TZ = True

# Static & Media files
STATIC_URL = '/static/'
STATIC_ROOT = BASE_DIR / 'staticfiles'
MEDIA_URL = '/media/'
MEDIA_ROOT = BASE_DIR / 'media'

# DRF Configuration
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': 50,
}

# JWT Configuration
SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(hours=12),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=7),
    'AUTH_HEADER_TYPES': ('Bearer',),
}

# CORS & CSRF Configuration
CORS_ALLOW_ALL_ORIGINS = os.environ.get('CORS_ALLOW_ALL_ORIGINS', 'True').lower() in ('true', '1', 't')
CORS_ALLOWED_ORIGINS = [
    'https://optimusinfinity.samsonandassociates.in',
    'http://optimusinfinity.samsonandassociates.in',
    'http://localhost:5173',
    'http://localhost:3000',
]

CSRF_TRUSTED_ORIGINS = [
    'https://api.optimusinfinity.samsonandassociates.in',
    'https://optimusinfinity.samsonandassociates.in',
    'http://localhost:5173',
    'http://localhost:3000',
]

# Default auto field
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

# Email Configuration
EMAIL_BACKEND = os.environ.get('EMAIL_BACKEND', 'django.core.mail.backends.console.EmailBackend')
EMAIL_HOST = os.environ.get('EMAIL_HOST', 'mail.samsonandassociates.in')
EMAIL_PORT = int(os.environ.get('EMAIL_PORT', 587))
EMAIL_USE_TLS = os.environ.get('EMAIL_USE_TLS', 'True').lower() in ('true', '1', 't')
EMAIL_HOST_USER = os.environ.get('EMAIL_HOST_USER', '')
EMAIL_HOST_PASSWORD = os.environ.get('EMAIL_HOST_PASSWORD', '')
DEFAULT_FROM_EMAIL = os.environ.get('DEFAULT_FROM_EMAIL', 'noreply@optimusinfinity.samsonandassociates.in')
FRONTEND_URL = os.environ.get('FRONTEND_URL', 'https://optimusinfinity.samsonandassociates.in')