"""
Django settings for Daleeli IQ Backend project.
"""

import os
from pathlib import Path
from decouple import config

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

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = config('SECRET_KEY', default='django-insecure-change-this-in-production')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = config('DEBUG', default=True, cast=bool)

ALLOWED_HOSTS = config('ALLOWED_HOSTS', default='localhost,127.0.0.1', cast=lambda v: [s.strip() for s in v.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',
    'rest_framework_simplejwt',
    'rest_framework_simplejwt.token_blacklist',
    'corsheaders',
    'drf_yasg',
    'django_filters',
    "fcm_django",
    
    # Local apps
    'accounts',
    'places',
    'bookings',
    'reviews',
    'offers',
    'ads',
    'notifications',
    'analytics',
]

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',
    'common.middleware.ErrorHandlingMiddleware',
]

ROOT_URLCONF = 'config.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'config', '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',
                'config.context_processors.user_context',
                'config.context_processors.site_settings',
            ],
        },
    },
]

WSGI_APPLICATION = 'config.wsgi.application'

# Database
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': config('DB_NAME', default='daleeli_db'),
        'USER': config('DB_USER', default='postgres'),
        'PASSWORD': config('DB_PASSWORD', default='postgres'),
        'HOST': config('DB_HOST', default='localhost'),
        'PORT': config('DB_PORT', default='5432'),
    }
}

# Cache Configuration
CACHES = {
    'default': {
        'BACKEND': 'django_redis.cache.RedisCache',
        'LOCATION': config('REDIS_URL', default='redis://127.0.0.1:6379/1'),
        'OPTIONS': {
            'CLIENT_CLASS': 'django_redis.client.DefaultClient',
        },
        'KEY_PREFIX': 'daleeli',
        'TIMEOUT': 300,  # 5 minutes default
    }
}

# 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 = 'ar'
TIME_ZONE = 'Asia/Baghdad'
USE_I18N = True
USE_TZ = True

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

# Media files
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')

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

# Custom User Model
AUTH_USER_MODEL = 'accounts.User'

# REST Framework settings
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': [
        'rest_framework.filters.SearchFilter',
        'rest_framework.filters.OrderingFilter',
    ],
    'DEFAULT_RENDERER_CLASSES': [
        'rest_framework.renderers.JSONRenderer',
    ],
    'DEFAULT_PARSER_CLASSES': [
        'rest_framework.parsers.JSONParser',
        'rest_framework.parsers.MultiPartParser',
        'rest_framework.parsers.FormParser',
    ],
}

# JWT Settings
from datetime import timedelta

SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(hours=1),
    'REFRESH_TOKEN_LIFETIME': timedelta(days=7),
    'ROTATE_REFRESH_TOKENS': True,
    'BLACKLIST_AFTER_ROTATION': True,
    'ALGORITHM': 'HS256',
    'SIGNING_KEY': SECRET_KEY,
    'AUTH_HEADER_TYPES': ('Bearer',),
}

# CORS settings
CORS_ALLOWED_ORIGINS = config(
    'CORS_ALLOWED_ORIGINS',
    default='http://localhost:3000,http://localhost:8000,http://localhost:8080,http://127.0.0.1:8080',
    cast=lambda v: [s.strip() for s in v.split(',')]
)

CORS_ALLOW_CREDENTIALS = True
CORS_ALLOW_ALL_ORIGINS = config('CORS_ALLOW_ALL_ORIGINS', default=False, cast=bool)  # For development only

# File Upload settings
FILE_UPLOAD_MAX_MEMORY_SIZE = 10 * 1024 * 1024  # 10MB
DATA_UPLOAD_MAX_MEMORY_SIZE = 10 * 1024 * 1024  # 10MB

# AWS S3 Settings (optional)
USE_S3 = config('USE_S3', default=False, cast=bool)
if USE_S3:
    AWS_ACCESS_KEY_ID = config('AWS_ACCESS_KEY_ID')
    AWS_SECRET_ACCESS_KEY = config('AWS_SECRET_ACCESS_KEY')
    AWS_STORAGE_BUCKET_NAME = config('AWS_STORAGE_BUCKET_NAME')
    AWS_S3_REGION_NAME = config('AWS_S3_REGION_NAME', default='us-east-1')
    AWS_S3_CUSTOM_DOMAIN = f'{AWS_STORAGE_BUCKET_NAME}.s3.amazonaws.com'
    AWS_DEFAULT_ACL = 'public-read'
    AWS_S3_OBJECT_PARAMETERS = {
        'CacheControl': 'max-age=86400',
    }
    DEFAULT_FILE_STORAGE = 'storages.backends.s3boto3.S3Boto3Storage'
    STATICFILES_STORAGE = 'storages.backends.s3boto3.S3StaticStorage'

# Celery Configuration
CELERY_BROKER_URL = config('CELERY_BROKER_URL', default='redis://localhost:6379/0')
CELERY_RESULT_BACKEND = config('CELERY_RESULT_BACKEND', default='redis://localhost:6379/0')
CELERY_ACCEPT_CONTENT = ['json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TIMEZONE = TIME_ZONE

# Email Configuration
EMAIL_BACKEND = config('EMAIL_BACKEND', default='django.core.mail.backends.console.EmailBackend')
EMAIL_HOST = config('EMAIL_HOST', default='smtp.gmail.com')
EMAIL_PORT = config('EMAIL_PORT', default=587, cast=int)
EMAIL_USE_TLS = config('EMAIL_USE_TLS', default=True, cast=bool)
EMAIL_HOST_USER = config('EMAIL_HOST_USER', default='')
EMAIL_HOST_PASSWORD = config('EMAIL_HOST_PASSWORD', default='')
DEFAULT_FROM_EMAIL = config('DEFAULT_FROM_EMAIL', default='noreply@daleeli.iq')

# Firebase Cloud Messaging (HTTP v1 API)
# Initialize Firebase Admin SDK
try:
    import firebase_admin
    from firebase_admin import credentials
    
    # Path to service account JSON file
    cred_path = os.path.join(BASE_DIR, "daliliiq-firebase-adminsdk-fbsvc-efda9bad9f.json")
    
    # Check if file exists before initializing
    if os.path.exists(cred_path):
        # Check if Firebase app is already initialized to avoid duplicate initialization
        try:
            # Try to get existing app (if already initialized)
            FIREBASE_APP = firebase_admin.get_app()
        except ValueError:
            # App doesn't exist, initialize it
            cred = credentials.Certificate(cred_path)
            FIREBASE_APP = firebase_admin.initialize_app(cred)
        
        # fcm_django settings (if using fcm_django package)
        FCM_DJANGO_SETTINGS = {
            "DEFAULT_FIREBASE_APP": FIREBASE_APP,
            "APP_VERBOSE_NAME": "Django FCM App",
            "ONE_DEVICE_PER_USER": False,
            "DELETE_INACTIVE_DEVICES": True,
        }
    else:
        print(f'Warning: Firebase service account file not found at {cred_path}')
        FIREBASE_APP = None
        FCM_DJANGO_SETTINGS = {}
except ImportError:
    print('Warning: firebase_admin not installed. Install with: pip install firebase-admin')
    FIREBASE_APP = None
    FCM_DJANGO_SETTINGS = {}
except ValueError as e:
    # Firebase already initialized or other ValueError
    try:
        FIREBASE_APP = firebase_admin.get_app()
        FCM_DJANGO_SETTINGS = {
            "DEFAULT_FIREBASE_APP": FIREBASE_APP,
            "APP_VERBOSE_NAME": "Django FCM App",
            "ONE_DEVICE_PER_USER": False,
            "DELETE_INACTIVE_DEVICES": True,
        }
    except:
        FIREBASE_APP = None
        FCM_DJANGO_SETTINGS = {}
except Exception as e:
    print(f'Warning: Firebase initialization failed: {e}')
    FIREBASE_APP = None
    FCM_DJANGO_SETTINGS = {}


# Logging
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'verbose': {
            'format': '{levelname} {asctime} {module} {message}',
            'style': '{',
        },
    },
    'handlers': {
        'file': {
            'level': 'INFO',
            'class': 'logging.FileHandler',
            'filename': os.path.join(BASE_DIR, 'logs', 'django.log'),
            'formatter': 'verbose',
        },
        'console': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',
            'formatter': 'verbose',
        },
    },
    'root': {
        'handlers': ['console', 'file'],
        'level': 'INFO',
    },
    'loggers': {
        'django': {
            'handlers': ['console', 'file'],
            'level': 'INFO',
            'propagate': False,
        },
    },
}