import os
from pathlib import Path
import environ

env = environ.Env()

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

dsp_env = os.environ.get("DSP_ENV", "production")
env_file = BASE_DIR / f"config/secrets/env.{dsp_env}"
if env_file.exists():
    environ.Env.read_env(str(env_file))
else:
    environ.Env.read_env(str(BASE_DIR / "config/secrets/env.production"))

SECRET_KEY = env("DJANGO_SECRET_KEY", default="insecure-dev-key-change-in-production")
DEBUG = env.bool("DJANGO_DEBUG", default=False)
ALLOWED_HOSTS = env.list("DJANGO_ALLOWED_HOSTS", default=["194.164.95.50", "localhost", "127.0.0.1"])

INSTALLED_APPS = [
    "grappelli",
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.humanize",
    "django.contrib.staticfiles",
    "django_extensions",
    "rest_framework",
    "rest_framework.authtoken",
    "mozilla_django_oidc",
    "corsheaders",
    "django_filters",
    "apps.core",
    "apps.users",
    "apps.subscriptions",
    "apps.batches",
    "apps.qc",
    "apps.shipments",
    "apps.documents",
    "apps.capa",
    "apps.esg",
    "apps.compliance",
    "apps.ai",
    "apps.notifications",
    "apps.ops",
    "apps.buyer",
    "encrypted_model_fields",
]

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",
    "apps.core.middleware.RBACMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
]

ROOT_URLCONF = "dsp_platform.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 = "dsp_platform.wsgi.application"

DATABASES = {
    "default": {
        "ENGINE": "django.db.backends.postgresql",
        "NAME": env("DB_NAME", default="ixg_platform"),
        "USER": env("DB_USER", default="postgres"),
        "PASSWORD": env("DB_PASSWORD", default=""),
        "HOST": env("DB_HOST", default="127.0.0.1"),
        "PORT": env.int("DB_PORT", default=5432),
    }
}

AUTH_PASSWORD_VALIDATORS = [
    {"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator"},
]

LANGUAGE_CODE = "en-gb"
TIME_ZONE = "Europe/London"
USE_I18N = True
USE_TZ = True

STATIC_URL = "/static/"
STATIC_ROOT = BASE_DIR / "staticfiles"
MEDIA_URL = "/media/"
MEDIA_ROOT = BASE_DIR / "media"

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

AUTH_USER_MODEL = "users.User"

AUTHENTICATION_BACKENDS = [
    "apps.users.auth.KeycloakOIDCBackend",
    "django.contrib.auth.backends.ModelBackend",
]

OIDC_OP_AUTHORIZATION_ENDPOINT = env("OIDC_OP_AUTHORIZATION_ENDPOINT", default="http://194.164.95.50:8443/realms/ixg/protocol/openid-connect/auth")
OIDC_OP_TOKEN_ENDPOINT = env("OIDC_OP_TOKEN_ENDPOINT", default="http://194.164.95.50:8443/realms/ixg/protocol/openid-connect/token")
OIDC_OP_USER_ENDPOINT = env("OIDC_OP_USER_ENDPOINT", default="http://194.164.95.50:8443/realms/ixg/protocol/openid-connect/userinfo")
OIDC_OP_JWKS_ENDPOINT = env("OIDC_OP_JWKS_ENDPOINT", default="http://194.164.95.50:8443/realms/ixg/protocol/openid-connect/certs")
OIDC_OP_LOGOUT_ENDPOINT = env("OIDC_OP_LOGOUT_ENDPOINT", default="http://194.164.95.50:8443/realms/ixg/protocol/openid-connect/logout")
OIDC_RP_SIGN_ALGO = "RS256"
OIDC_RP_CLIENT_ID = env("OIDC_RP_CLIENT_ID", default="ixg-platform")
OIDC_RP_CLIENT_SECRET = env("OIDC_RP_CLIENT_SECRET", default="")
OIDC_RP_SCOPES = "openid email profile"
OIDC_USE_NONCE = True
OIDC_CREATE_USER = True
OIDC_STORE_ACCESS_TOKEN = True
OIDC_STORE_ID_TOKEN = True
LOGIN_URL = "oidc_authentication_init"
LOGOUT_REDIRECT_URL = "/"
LOGIN_REDIRECT_URL = "/admin/"

KEYCLOAK_SERVER_URL = env("KEYCLOAK_SERVER_URL", default="http://194.164.95.50:8443")
KEYCLOAK_REALM = env("KEYCLOAK_REALM", default="ixg")

REST_FRAMEWORK = {
    "DEFAULT_AUTHENTICATION_CLASSES": [
        "rest_framework.authentication.SessionAuthentication",
        "rest_framework.authentication.TokenAuthentication",
    ],
    "DEFAULT_PERMISSION_CLASSES": [
        "rest_framework.permissions.IsAuthenticated",
    ],
    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.PageNumberPagination",
    "PAGE_SIZE": 20,
}

CELERY_BROKER_URL = env("CELERY_BROKER_URL", default="redis://127.0.0.1:6379/0")
CELERY_RESULT_BACKEND = env("CELERY_RESULT_BACKEND", default="redis://127.0.0.1:6379/0")
CELERY_ACCEPT_CONTENT = ["json"]
CELERY_TASK_SERIALIZER = "json"
CELERY_RESULT_SERIALIZER = "json"
CELERY_TIMEZONE = "Europe/London"

CORS_ALLOWED_ORIGINS = env.list("CORS_ALLOWED_ORIGINS", default=["http://194.164.95.50"])
CORS_ALLOW_CREDENTIALS = True

STRIPE_SECRET_KEY = env("STRIPE_SECRET_KEY", default="")
STRIPE_WEBHOOK_SECRET = env("STRIPE_WEBHOOK_SECRET", default="")
FIELD_ENCRYPTION_KEY = env("ENCRYPTION_KEY", default="")