import os
from pathlib import Path

from dotenv import load_dotenv

load_dotenv()

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

SECRET_KEY = os.getenv("DJANGO_SECRET_KEY", "django-insecure-job-queue-local-dev-key")
DEBUG = os.getenv("DEBUG", "true").lower() in {"1", "true", "yes"}
ALLOWED_HOSTS = [host.strip() for host in os.getenv("DJANGO_ALLOWED_HOSTS", "localhost,127.0.0.1,0.0.0.0").split(",")]

INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    "corsheaders",
    "rest_framework",
    "drf_spectacular",
    "jobs",
]

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",
]

ROOT_URLCONF = "config.urls"

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        "DIRS": [],
        "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"
ASGI_APPLICATION = "config.asgi.application"

if os.getenv("TEST_DATABASE_ENGINE") == "sqlite":
    DATABASES = {
        "default": {
            "ENGINE": "django.db.backends.sqlite3",
            "NAME": BASE_DIR / "test.sqlite3",
        }
    }
else:
    DATABASES = {
        "default": {
            "ENGINE": "django.db.backends.postgresql",
            "NAME": os.getenv("POSTGRES_DB", "job_queue"),
            "USER": os.getenv("POSTGRES_USER", "postgres"),
            "PASSWORD": os.getenv("POSTGRES_PASSWORD", "postgres"),
            "HOST": os.getenv("POSTGRES_HOST", "localhost"),
            "PORT": os.getenv("POSTGRES_PORT", "5432"),
            "CONN_MAX_AGE": int(os.getenv("POSTGRES_CONN_MAX_AGE", "0")),
        }
    }

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 = os.getenv("TIME_ZONE", "Asia/Tehran")
USE_I18N = True
USE_TZ = True

STATIC_URL = "/static/"
STATIC_ROOT = BASE_DIR / "staticfiles"

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

CORS_ALLOW_ALL_ORIGINS = DEBUG
CORS_ALLOWED_ORIGINS = [
    origin.strip()
    for origin in os.getenv("DJANGO_CORS_ALLOWED_ORIGINS", "http://localhost:5173,http://127.0.0.1:5173").split(",")
    if origin.strip()
]

REST_FRAMEWORK = {
    "DEFAULT_AUTHENTICATION_CLASSES": [],
    "DEFAULT_PERMISSION_CLASSES": ["rest_framework.permissions.AllowAny"],
    "DEFAULT_SCHEMA_CLASS": "drf_spectacular.openapi.AutoSchema",
}

SPECTACULAR_SETTINGS = {
    "TITLE": "Minimal Job Queue API",
    "DESCRIPTION": "PostgreSQL-backed job queue with safe claiming and deterministic state transitions.",
    "VERSION": "1.0.0",
    "SERVE_INCLUDE_SCHEMA": False,
}

JOB_WORKER_THREADS = int(os.getenv("JOB_WORKER_THREADS", "4"))
JOB_WORKER_POLL_INTERVAL_MS = int(os.getenv("JOB_WORKER_POLL_INTERVAL_MS", "500"))
JOB_WORKER_LEASE_SECONDS = int(os.getenv("JOB_WORKER_LEASE_SECONDS", "30"))
JOB_WORKER_CLEANUP_INTERVAL_SECONDS = int(os.getenv("JOB_WORKER_CLEANUP_INTERVAL_SECONDS", "5"))
JOB_WORKER_CLEANUP_BATCH_SIZE = int(os.getenv("JOB_WORKER_CLEANUP_BATCH_SIZE", "100"))
JOB_WORKER_BACKOFF_BASE_SECONDS = int(os.getenv("JOB_WORKER_BACKOFF_BASE_SECONDS", "5"))
JOB_WORKER_BACKOFF_MAX_SECONDS = int(os.getenv("JOB_WORKER_BACKOFF_MAX_SECONDS", "300"))
JOB_WORKER_MAX_ATTEMPTS_DEFAULT = int(os.getenv("JOB_WORKER_MAX_ATTEMPTS_DEFAULT", "3"))