from pathlib import Path
from datetime import timedelta
import environ

BASE_DIR = Path(__file__).resolve().parent.parent.parent
env = environ.Env()
env.read_env(BASE_DIR / ".env")

SECRET_KEY = env("SECRET_KEY")

DEBUG = env("DEBUG", default=False)

ALLOWED_HOSTS = env.list("ALLOWED_HOSTS", default=[])

# ---------- CORS ----------
CORS_ALLOW_ALL_ORIGINS = env.bool("CORS_ALLOW_ALL_ORIGINS", default=DEBUG)
CORS_ALLOW_CREDENTIALS = env.bool("CORS_ALLOW_CREDENTIALS", default=True)
CORS_ALLOWED_ORIGINS = env.list("CORS_ALLOWED_ORIGINS", default=[])

# ---------- Application definition ----------

DEFAULT_APPS = [
    "jazzmin",
    "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",
    "django_filters",
    "drf_spectacular",
    "django_ckeditor_5",
]

LOCAL_APPS = [
    "users",
    "checkpoint",
    "record",
]

INSTALLED_APPS = DEFAULT_APPS + THIRD_PARTY_APPS + LOCAL_APPS

MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "whitenoise.middleware.WhiteNoiseMiddleware",
    "django.contrib.sessions.middleware.SessionMiddleware",
    "corsheaders.middleware.CorsMiddleware",
    "django.middleware.common.CommonMiddleware",
    "django.middleware.csrf.CsrfViewMiddleware",
    "django.contrib.auth.middleware.AuthenticationMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
    "users.middleware.AuditLogMiddleware",
]

ROOT_URLCONF = "iems_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 = "iems_backend.wsgi.application"

# Custom User Model
AUTH_USER_MODEL = "users.User"


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


# 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 = "Asia/Kathmandu"

USE_I18N = True

USE_TZ = False


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

STATIC_URL = "static/"
STATIC_ROOT = BASE_DIR / "staticfiles"
STORAGES = {
    "default": {
        "BACKEND": "django.core.files.storage.FileSystemStorage",
    },
    "staticfiles": {
        "BACKEND": "whitenoise.storage.CompressedManifestStaticFilesStorage",
    },
}

# Media files (user-uploaded images)
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": [
        "users.authentication.ActiveUserJWTAuthentication",
    ],
    "DEFAULT_PERMISSION_CLASSES": [
        "rest_framework.permissions.IsAuthenticated",
    ],
    "DEFAULT_PAGINATION_CLASS": "iems_backend.pagination.StandardPagination",
    "PAGE_SIZE": 20,
    "DEFAULT_FILTER_BACKENDS": [
        "django_filters.rest_framework.DjangoFilterBackend",
        "rest_framework.filters.SearchFilter",
        "rest_framework.filters.OrderingFilter",
    ],
    "DEFAULT_SCHEMA_CLASS": "drf_spectacular.openapi.AutoSchema",
    "DEFAULT_RENDERER_CLASSES": [
        "rest_framework.renderers.JSONRenderer",
    ],
    "EXCEPTION_HANDLER": "iems_backend.exception_handlers.custom_exception_handler",
}

# Allow browsable API renderer in DEBUG mode
if DEBUG:
    REST_FRAMEWORK["DEFAULT_RENDERER_CLASSES"].append(
        "rest_framework.renderers.BrowsableAPIRenderer"
    )

# ---------- drf-spectacular ----------
SPECTACULAR_SETTINGS = {
    "TITLE": "IEMS Backend API",
    "DESCRIPTION": "Public API for IEMS.",
    "VERSION": "1.0.0",
    "SERVE_INCLUDE_SCHEMA": False,
    "SCHEMA_PATH_PREFIX": "/api/v1/",
    "COMPONENT_SPLIT_REQUEST": True,
    "SWAGGER_UI_SETTINGS": {
        "deepLinking": True,
        "persistAuthorization": True,
        "displayOperationId": False,
    },
    "AUTHENTICATION_WHITELIST": [
        "users.authentication.ActiveUserJWTAuthentication",
    ],
    "ENUM_NAME_OVERRIDES": {
        "UserStatusEnum": [
            ("active", "Active"),
            ("inactive", "Inactive"),
            ("suspended", "Suspended"),
        ],
        "MetadataDeletionRequestStatusEnum": [
            ("pending", "Pending"),
            ("approved", "Approved"),
            ("denied", "Denied"),
        ],
    },
}

# ---------- JWT ----------
SIMPLE_JWT = {
    "ACCESS_TOKEN_LIFETIME": timedelta(
        minutes=env.int("JWT_ACCESS_TOKEN_LIFETIME_MINUTES", default=15)
    ),
    "REFRESH_TOKEN_LIFETIME": timedelta(
        days=env.int("JWT_REFRESH_TOKEN_LIFETIME_DAYS", default=7)
    ),
    "ROTATE_REFRESH_TOKENS": env.bool("JWT_ROTATE_REFRESH_TOKENS", default=False),
    "BLACKLIST_AFTER_ROTATION": env.bool("JWT_BLACKLIST_AFTER_ROTATION", default=True),
    "UPDATE_LAST_LOGIN": env.bool("JWT_UPDATE_LAST_LOGIN", default=False),
    "ALGORITHM": env("JWT_ALGORITHM", default="HS256"),
    "SIGNING_KEY": env("JWT_SIGNING_KEY", default=SECRET_KEY),
    "AUTH_HEADER_TYPES": (env("JWT_AUTH_HEADER_TYPE", default="Bearer"),),
}

# ---------- CKEditor 5 ----------
CKEDITOR_5_CONFIGS = {
    "default": {
        "toolbar": [
            "heading",
            "|",
            "bold",
            "italic",
            "underline",
            "strikethrough",
            "|",
            "link",
            "blockQuote",
            "code",
            "codeBlock",
            "|",
            "bulletedList",
            "numberedList",
            "todoList",
            "|",
            "outdent",
            "indent",
            "|",
            "imageUpload",
            "mediaEmbed",
            "insertTable",
            "|",
            "undo",
            "redo",
        ],
    },
}
CKEDITOR_5_FILE_STORAGE = "django.core.files.storage.FileSystemStorage"
CKEDITOR_5_UPLOAD_FILE_TYPES = ["jpeg", "jpg", "png", "gif", "bmp", "webp"]