"""
Django settings for multi-tenant SaaS platform.
"""

import os
from pathlib import Path
from dotenv import load_dotenv

load_dotenv()

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

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = os.getenv('SECRET_KEY', 'django-insecure-key-for-development')

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

ALLOWED_HOSTS = os.getenv('ALLOWED_HOSTS', 'localhost,127.0.0.1').split(',')

# Application definition
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    # Third party apps
    'rest_framework',
    'corsheaders',
    'django_filters',
    'django_extensions',

    # Multi-tenant support
    'django_tenants',

    # Core apps
    'core.tenants',
    'core.users',
    'core.auth',

    # Module apps
    'modules.retail',
    'modules.healthcare',
    'modules.education',
    'modules.logistics',
    'modules.beauty',
]

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',

    # Multi-tenant middleware
    'django_tenants.middleware.main.TenantMainMiddleware',
    'core.middleware.tenant_middleware.TenantMiddleware',
]

ROOT_URLCONF = 'core.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 = 'core.wsgi.application'

# Database
DATABASES = {
    'default': {
        'ENGINE': 'django_tenants.postgresql_backend',
        'NAME': os.getenv('DB_NAME', 'saas_platform'),
        'USER': os.getenv('DB_USER', 'postgres'),
        'PASSWORD': os.getenv('DB_PASSWORD', 'devpass'),
        'HOST': os.getenv('DB_HOST', 'localhost'),
        'PORT': os.getenv('DB_PORT', '5432'),
    }
}

# Multi-tenant configuration
TENANT_MODEL = 'tenants.Tenant'
TENANT_DOMAIN_MODEL = 'tenants.Domain'
TENANT_CACHE_PREFIX = 'tenant_'

# 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
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'Asia/Kuala_Lumpur'
USE_I18N = True
USE_TZ = True

# Static files (CSS, JavaScript, Images)
STATIC_URL = '/static/'
STATIC_ROOT = BASE_DIR / 'staticfiles'

MEDIA_URL = '/media/'
MEDIA_ROOT = BASE_DIR / 'media'

# Default primary key field type
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

# Django REST Framework
REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': [
        'rest_framework_simplejwt.authentication.JWTAuthentication',
        'rest_framework.authentication.SessionAuthentication',
    ],
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.IsAuthenticated',
    ],
    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
    'PAGE_SIZE': 20,
    'DEFAULT_FILTER_BACKENDS': [
        'django_filters.rest_framework.DjangoFilterBackend',
        'rest_framework.filters.SearchFilter',
        'rest_framework.filters.OrderingFilter',
    ],
    'DEFAULT_THROTTLE_CLASSES': [
        'rest_framework.throttling.AnonRateThrottle',
        'rest_framework.throttling.UserRateThrottle',
    ],
    'DEFAULT_THROTTLE_RATES': {
        'anon': '100/hour',
        'user': '1000/hour',
    },
}

# CORS settings
CORS_ALLOWED_ORIGINS = [
    "http://localhost:3000",
    "http://127.0.0.1:3000",
]
CORS_ALLOW_CREDENTIALS = True

# JWT settings
from datetime import timedelta

SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(minutes=60),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=7),
    'ROTATE_REFRESH_TOKENS': True,
    'BLACKLIST_AFTER_ROTATION': True,
    'ALGORITHM': 'HS256',
    'SIGNING_KEY': os.getenv('JWT_SIGNING_KEY', SECRET_KEY),
}

# Redis settings
REDIS_URL = os.getenv('REDIS_URL', 'redis://localhost:6379/0')

# Celery settings
CELERY_BROKER_URL = REDIS_URL
CELERY_RESULT_BACKEND = REDIS_URL
CELERY_ACCEPT_CONTENT = ['json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TIMEZONE = TIME_ZONE

# Stripe settings
STRIPE_SECRET_KEY = os.getenv('STRIPE_SECRET_KEY', '')
STRIPE_PUBLISHABLE_KEY = os.getenv('STRIPE_PUBLISHABLE_KEY', '')
STRIPE_WEBHOOK_SECRET = os.getenv('STRIPE_WEBHOOK_SECRET', '')

# Midtrans settings
MIDTRANS_SERVER_KEY = os.getenv('MIDTRANS_SERVER_KEY', '')
MIDTRANS_CLIENT_KEY = os.getenv('MIDTRANS_CLIENT_KEY', '')

# Email settings
EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
EMAIL_HOST = os.getenv('EMAIL_HOST', '')
EMAIL_PORT = int(os.getenv('EMAIL_PORT', '587'))
EMAIL_USE_TLS = os.getenv('EMAIL_USE_TLS', 'True').lower() == 'true'
EMAIL_HOST_USER = os.getenv('EMAIL_HOST_USER', '')
EMAIL_HOST_PASSWORD = os.getenv('EMAIL_HOST_PASSWORD', '')

# Logging
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'verbose': {
            'format': '{levelname} {asctime} {module} {process:d} {thread:d} {message}',
            'style': '{',
        },
        'simple': {
            'format': '{levelname} {message}',
            'style': '{',
        },
    },
    'handlers': {
        'console': {
            'level': 'INFO',
            'class': 'logging.StreamHandler',
            'formatter': 'verbose',
        },
        'file': {
            'level': 'INFO',
            'class': 'logging.FileHandler',
            'filename': 'saas_platform.log',
            'formatter': 'verbose',
        },
    },
    'loggers': {
        'django': {
            'handlers': ['console', 'file'],
            'level': 'INFO',
            'propagate': False,
        },
        'core': {
            'handlers': ['console', 'file'],
            'level': 'INFO',
            'propagate': False,
        },
        'modules': {
            'handlers': ['console', 'file'],
            'level': 'INFO',
            'propagate': False,
        },
    },
}

# Security settings
SECURE_BROWSER_XSS_FILTER = True
SECURE_CONTENT_TYPE_NOSNIFF = True
X_FRAME_OPTIONS = 'DENY'
SECURE_HSTS_INCLUDE_SUBDOMAINS = True
SECURE_HSTS_PRELOAD = True
SECURE_HSTS_SECONDS = 31536000

# Healthcare compliance
HEALTHCARE_DATA_ENCRYPTION = os.getenv('HEALTHCARE_DATA_ENCRYPTION', 'True').lower() == 'true'
AUDIT_LOG_ENABLED = os.getenv('AUDIT_LOG_ENABLED', 'True').lower() == 'true'

# Data retention
DATA_RETENTION_DAYS = int(os.getenv('DATA_RETENTION_DAYS', '90'))