settings.py

"""
Django settings for incidents project.

Generated by 'django-admin startproject' using Django 4.0.5.

For more information on this file, see
https://docs.djangoproject.com/en/4.0/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/4.0/ref/settings/
"""

import os
from pathlib import Path
from dotenv import load_dotenv
from opentelemetry.instrumentation.django import DjangoInstrumentor
from opentelemetry import trace
from opentelemetry.exporter.otlp.proto.grpc.trace_exporter import OTLPSpanExporter
from opentelemetry.sdk.resources import SERVICE_NAME, Resource
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import BatchSpanProcessor

load_dotenv()

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


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/

SECRET_KEY = os.getenv("SECRET_KEY")

# SECURITY WARNING: don't run with debug turned on in production!
if os.getenv("DEBUG") == "True": 
    DEBUG = True 
else: 
    DEBUG= False


ALLOWED_HOSTS = os.getenv("ALLOWED_HOSTS").split(",")

CORS_ALLOWED_ORIGINS = os.getenv("ALLOWED_ORIGINS").split(",")
CORS_ALLOW_CREDENTIALS = True
CSRF_TRUSTED_ORIGINS = os.getenv("ALLOWED_ORIGINS").split(",")

CSRF_COOKIE_SAMESITE = None
SESSION_COOKIE_SAMESITE = 'None'
# CSRF_COOKIE_HTTPONLY = False
SESSION_COOKIE_HTTPONLY = True
SESSION_COOKIE_SECURE = True
SESSION_COOKIE_DOMAIN = os.getenv("SESSION_COOKIE_DOMAIN")


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework',
    'rest_framework_simplejwt',
    'corsheaders',
    'incidents',
]

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',
]

ROOT_URLCONF = 'incidents.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 = 'incidents.wsgi.application'


# Database
# https://docs.djangoproject.com/en/4.0/ref/settings/#databases

if os.getenv("PRODUCTION") == "True": 
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.postgresql',
            'NAME': os.getenv("DB_NAME"),
            'USER': os.getenv("DB_USER"),
            'PASSWORD': os.getenv("DB_PASSWORD"),
            'HOST': os.getenv("DB_HOST"),
            'PORT': os.getenv("DB_PORT"),
        }
    }
else: 
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': BASE_DIR / 'db.sqlite3',
        }
    }


# Password validation
# https://docs.djangoproject.com/en/4.0/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/4.0/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/4.0/howto/static-files/

STATIC_URL = 'static/'

# Default primary key field type
# https://docs.djangoproject.com/en/4.0/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'


# Custom authentication backend

AUTHENTICATION_BACKENDS = ['incidents.app.backends.EmailBackend']

CSRF_USE_SESSIONS = True


REST_FRAMEWORK = {
    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
    'PAGE_SIZE': 10,
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework.authentication.BasicAuthentication',
        'rest_framework.authentication.SessionAuthentication'
    )
}

if os.getenv("TRACING_BACKEND_HOST"):
    DjangoInstrumentor().instrument()
    trace.set_tracer_provider(
    TracerProvider(
            resource=Resource.create({SERVICE_NAME: "incidents-api"})
        )
    )
    tracer = trace.get_tracer(__name__)
    otlp_exporter = OTLPSpanExporter(
        endpoint=os.getenv("TRACING_BACKEND_HOST"),
    )

    # Create a BatchSpanProcessor and add the exporter to it
    span_processor = BatchSpanProcessor(otlp_exporter)

    # add to the tracer
    trace.get_tracer_provider().add_span_processor(span_processor)