"""
Common settings shared between development and production environments.
Environment-specific settings (DEBUG, SECRET_KEY, DATABASES, etc.)
live in development.py and production.py respectively.
"""

from datetime import timedelta
from pathlib import Path

import environ

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

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

# ── Installed Apps ────────────────────────────────────────────────────────────

THIRD_PARTY_APPS = [
    "rest_framework",
    "rest_framework_simplejwt",
    "corsheaders",
    "django_tailwind_cli",
    "django_htmx",
    "django_filters",
    "import_export",
    "drf_spectacular",
    "django_q",
]

USER_DEFINED_APPS = [
    "src.epics.apps.EpicsConfig",
    "src.notes.apps.NotesConfig",
    "src.projects.apps.ProjectsConfig",
    "src.accounts.apps.AccountsConfig",
    "src.external.apps.ExternalConfig",
    "src.notifications.apps.NotificationsConfig",
    "src.tickets.apps.TicketsConfig",
]

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

INSTALLED_APPS = BUILT_IN_APPS + THIRD_PARTY_APPS + USER_DEFINED_APPS
INSTALLED_APPS.insert(0, "jazzmin")

# ── Middleware ────────────────────────────────────────────────────────────────

MIDDLEWARE = [
    "corsheaders.middleware.CorsMiddleware",
    "django.middleware.security.SecurityMiddleware",
    "whitenoise.middleware.WhiteNoiseMiddleware",
    "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",
    "django_htmx.middleware.HtmxMiddleware",
]

ROOT_URLCONF = "config.urls"

# ── Templates ─────────────────────────────────────────────────────────────────

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",
                "src.dashboard.context_processors.site_stats",
            ],
        },
    },
]

WSGI_APPLICATION = "config.wsgi.application"

# ── Authentication ────────────────────────────────────────────────────────────

AUTH_USER_MODEL = "accounts.User"

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",
    },
]

LOGIN_URL = "login"
LOGIN_REDIRECT_URL = "dashboard"

SESSION_SAVE_EVERY_REQUEST = True
SESSION_ENGINE = "django.contrib.sessions.backends.cached_db"

# ── Internationalisation ──────────────────────────────────────────────────────

LANGUAGE_CODE = "en-us"
TIME_ZONE = env("TIME_ZONE", default="Asia/Kathmandu")
USE_I18N = True
USE_TZ = True

# ── Static & Media Files ──────────────────────────────────────────────────────

STATIC_URL = "/static/"
STATIC_ROOT = BASE_DIR / "staticfiles"
STATICFILES_DIRS = [BASE_DIR / "static/"]

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

# ── Cache ──────────────────────────────────────────────────────────────────

CACHES = {
    "default": {
        "BACKEND": "django.core.cache.backends.db.DatabaseCache",
        "LOCATION": "django_cache",
    }
}

# ── Database ────────────────────────────────────────────────────────────────

CONN_MAX_AGE = env.int("CONN_MAX_AGE", default=600)

DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

# ── Tailwind ──────────────────────────────────────────────────────────────────

TAILWIND_CLI_USE_DAISY_UI = False
TAILWIND_CLI_SRC_CSS = "static/src/tailwind.css"

# ── REST Framework ────────────────────────────────────────────────────────────

REST_FRAMEWORK = {
    "DEFAULT_AUTHENTICATION_CLASSES": (
        "rest_framework_simplejwt.authentication.JWTAuthentication",
        "rest_framework.authentication.SessionAuthentication",
    ),
    "DEFAULT_PERMISSION_CLASSES": ("rest_framework.permissions.IsAuthenticated",),
    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.PageNumberPagination",
    "PAGE_SIZE": 50,
    "DEFAULT_FILTER_BACKENDS": (
        "django_filters.rest_framework.DjangoFilterBackend",
        "rest_framework.filters.SearchFilter",
        "rest_framework.filters.OrderingFilter",
    ),
    "DEFAULT_SCHEMA_CLASS": "drf_spectacular.openapi.AutoSchema",
    "DEFAULT_THROTTLE_CLASSES": [
        "rest_framework.throttling.AnonRateThrottle",
        "rest_framework.throttling.UserRateThrottle",
    ],
    "DEFAULT_THROTTLE_RATES": {
        "anon": "100/hour",
        "user": "1000/hour",
    },
}

SIMPLE_JWT = {
    "ACCESS_TOKEN_LIFETIME": timedelta(hours=1),
    "REFRESH_TOKEN_LIFETIME": timedelta(days=30),
    "ROTATE_REFRESH_TOKENS": True,
    "AUTH_HEADER_TYPES": ("Bearer",),
}

# ── CORS ──────────────────────────────────────────────────────────────────────

CORS_ALLOW_METHODS = [
    "DELETE",
    "GET",
    "OPTIONS",
    "PATCH",
    "POST",
    "PUT",
]

CORS_ALLOW_HEADERS = [
    "accept",
    "accept-encoding",
    "authorization",
    "content-type",
    "dnt",
    "origin",
    "user-agent",
    "x-csrftoken",
    "x-requested-with",
]

CORS_PREFLIGHT_MAX_AGE = 86400  # 24 hours

# ── Security (shared baseline) ────────────────────────────────────────────────

SECURE_BROWSER_XSS_FILTER = True
SECURE_CONTENT_TYPE_NOSNIFF = True
X_FRAME_OPTIONS = "DENY"

# ── Site ──────────────────────────────────────────────────────────────────────

BASE_URL = env("BASE_URL", default="http://localhost:8000")
SITE_NAME = env("SITE_NAME", default="Project Management")

# ── API Docs ──────────────────────────────────────────────────────────────────

SPECTACULAR_SETTINGS = {
    "TITLE": "Project Management API",
    "DESCRIPTION": "Django port of Project Management",
    "VERSION": "1.0.0",
}

# ── Django Q2 ─────────────────────────────────────────────────────────────────
# timeout must be set and less than retry to avoid tasks being re-triggered early

Q_CLUSTER = {
    "name": "project_management",
    "workers": env.int("Q_WORKERS", default=2),
    "timeout": 60,
    "retry": 120,
    "queue_limit": 50,
    "bulk": 10,
    "orm": "default",
    "poll": 2000,
    "recycle": 500,
}