from pathlib import Path

import environ


BASE_DIR = Path(__file__).resolve().parent.parent.parent
APPS_DIR = BASE_DIR / "apps"

env = environ.Env(
    DEBUG=(bool, False),
    ALLOWED_HOSTS=(list, []),
    CSRF_TRUSTED_ORIGINS=(list, []),
    CORS_ALLOWED_ORIGINS=(list, []),
)

ENV_FILE = BASE_DIR / ".env"
if ENV_FILE.exists():
    environ.Env.read_env(ENV_FILE)


SECRET_KEY = env("SECRET_KEY", default="unsafe-local-development-secret-key")
DEBUG = env("DEBUG")

ALLOWED_HOSTS = env("ALLOWED_HOSTS")
CSRF_TRUSTED_ORIGINS = env("CSRF_TRUSTED_ORIGINS")


DJANGO_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
]

THIRD_PARTY_APPS = [
    "corsheaders",
    "rest_framework",
    "drf_spectacular",
]

LOCAL_APPS = [
    "apps.core",
    "apps.reports",
    "apps.proxy",
]

INSTALLED_APPS = DJANGO_APPS + THIRD_PARTY_APPS + LOCAL_APPS


MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "whitenoise.middleware.WhiteNoiseMiddleware",
    "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": [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 = "config.wsgi.application"


DATABASES = {
    "default": env.db("DATABASE_URL", default=f"sqlite:///{BASE_DIR / 'db.sqlite3'}"),
}
DATABASES["default"]["ATOMIC_REQUESTS"] = True


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",
    },
]


LANGUAGE_CODE = "en-us"
TIME_ZONE = env("TIME_ZONE", default="UTC")
USE_I18N = True
USE_TZ = True


STATIC_URL = "static/"
STATIC_ROOT = BASE_DIR / "staticfiles"
STATICFILES_STORAGE = "whitenoise.storage.CompressedManifestStaticFilesStorage"

MEDIA_URL = "media/"
MEDIA_ROOT = BASE_DIR / "media"

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"


CORS_ALLOWED_ORIGINS = env("CORS_ALLOWED_ORIGINS")
CORS_ALLOW_CREDENTIALS = env.bool("CORS_ALLOW_CREDENTIALS", default=True)


REST_FRAMEWORK = {
    "DEFAULT_SCHEMA_CLASS": "drf_spectacular.openapi.AutoSchema",
    "DEFAULT_RENDERER_CLASSES": [
        "rest_framework.renderers.JSONRenderer",
    ],
    "DEFAULT_PARSER_CLASSES": [
        "rest_framework.parsers.JSONParser",
        "rest_framework.parsers.FormParser",
        "rest_framework.parsers.MultiPartParser",
    ],
    "DEFAULT_AUTHENTICATION_CLASSES": [],
    "DEFAULT_PERMISSION_CLASSES": [
        "rest_framework.permissions.AllowAny",
    ],
    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.PageNumberPagination",
    "PAGE_SIZE": env.int("DRF_PAGE_SIZE", default=20),
    "DEFAULT_THROTTLE_CLASSES": [
        "rest_framework.throttling.AnonRateThrottle",
        "rest_framework.throttling.UserRateThrottle",
    ],
    "DEFAULT_THROTTLE_RATES": {
        "anon": env("DRF_ANON_THROTTLE_RATE", default="100/hour"),
        "user": env("DRF_USER_THROTTLE_RATE", default="1000/hour"),
    },
}


SPECTACULAR_SETTINGS = {
    "TITLE": "CRM Backend API",
    "DESCRIPTION": (
        "API for CRM report generation and health checks, plus a merged view of "
        "every proxied service's own API (see apps.proxy)."
    ),
    "VERSION": "1.0.0",
    "SERVE_INCLUDE_SCHEMA": False,
    "POSTPROCESSING_HOOKS": [
        "drf_spectacular.hooks.postprocess_schema_enums",
        "apps.proxy.schema.merge_upstream_schemas",
    ],
}


SERVICE_REQUEST_TIMEOUT = env.int("SERVICE_REQUEST_TIMEOUT", default=30)

OAUTH2_PROVIDER_PUBLIC_URL = env("OAUTH2_PROVIDER_PUBLIC_URL", default="")
OAUTH2_PROVIDER_PRIVATE_URL = env("OAUTH2_PROVIDER_PRIVATE_URL", default="")
OAUTH2_PROVIDER_BASE_PUBLIC_URL = env("OAUTH2_PROVIDER_BASE_PUBLIC_URL", default="")
OAUTH2_PROVIDER_BASE_PRIVATE_URL = env("OAUTH2_PROVIDER_BASE_PRIVATE_URL", default="")
OAUTH2_PROVIDER_CLIENT_ID = env("OAUTH2_PROVIDER_CLIENT_ID", default="")
OAUTH2_PROVIDER_CLIENT_SECRET = env("OAUTH2_PROVIDER_CLIENT_SECRET", default="")
OAUTH2_PROVIDER_SCOPES = env("OAUTH2_PROVIDER_SCOPES", default="")
OAUTH2_CLIENT_ID = env("OAUTH2_CLIENT_ID", default="")
OAUTH2_CLIENT_SECRET = env("OAUTH2_CLIENT_SECRET", default="")
OAUTH2_SCOPES = env("OAUTH2_SCOPES", default="")
ADVERTISING_BASE_PUBLIC_URL = env("ADVERTISING_BASE_PUBLIC_URL", default="")
ACCOUNTS_BASE_PUBLIC_URL = env("ACCOUNTS_BASE_PUBLIC_URL", default="")
WALLET_BASE_PUBLIC_URL = env("WALLET_BASE_PUBLIC_URL", default="")
WALLET_RIAL = env("WALLET_RIAL", default="")
WALLET_REWARD = env("WALLET_REWARD", default="")
CHAT_BASE_PUBLIC_URL = env("CHAT_BASE_PUBLIC_URL", default="")
NOTIFICATIONS_BASE_PUBLIC_URL = env("NOTIFICATIONS_BASE_PUBLIC_URL", default="")
PROMOTIONS_BASE_PUBLIC_URL = env("PROMOTIONS_BASE_PUBLIC_URL", default="")
CAMPAIGN_BASE_PUBLIC_URL = env("CAMPAIGN_BASE_PUBLIC_URL", default="")
IPG_BASE_PUBLIC_URL = env("IPG_BASE_PUBLIC_URL", default="")

# Maps the first path segment of a proxied request (thisprojectbaseurl/<service>/<rest>)
# to the upstream service's base URL. See apps.proxy.views.ServiceProxyView.
PROXY_SERVICE_BASE_URLS = {
    "accounts": ACCOUNTS_BASE_PUBLIC_URL,
    "wallet": WALLET_BASE_PUBLIC_URL,
    "advertising": ADVERTISING_BASE_PUBLIC_URL,
    "chat": CHAT_BASE_PUBLIC_URL,
    "notifications": NOTIFICATIONS_BASE_PUBLIC_URL,
    "promotions": PROMOTIONS_BASE_PUBLIC_URL,
    "campaign": CAMPAIGN_BASE_PUBLIC_URL,
    "ipg": IPG_BASE_PUBLIC_URL,
}

# Where each service publishes its own raw OpenAPI document (drf-spectacular's
# SpectacularAPIView, mounted at different prefixes per service). Used by
# apps.proxy.schema to fold every proxied endpoint into this service's swagger.
PROXY_SERVICE_SCHEMA_PATHS = {
    "accounts": "/swagger/?format=json",
    "wallet": "/swagger/?format=json",
    "advertising": "/swagger/?format=json",
    "chat": "/swagger/?format=json",
    "notifications": "/swagger/?format=json",
    "promotions": "/swagger/?format=json",
    "campaign": "/api/swagger/schema/?format=json",
    "ipg": "/swagger/?format=json",
}