"""
Django settings for rosterchief project.

Generated by 'django-admin startproject' using Django 6.0.6.

For more information on this file, see
https://docs.djangoproject.com/en/6.0/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/6.0/ref/settings/
"""

from importlib.util import find_spec
from pathlib import Path

from celery.schedules import crontab
from decouple import Csv, config
from dj_database_url import parse as db_url

# 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/6.0/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = config("DJANGO_SECRET_KEY")

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = config("DJANGO_DEBUG", default=False, cast=bool)

ALLOWED_HOSTS = config("DJANGO_ALLOWED_HOSTS", cast=Csv(), default="")
# The loopback is always allowed, and it must be: the container's own healthcheck and the
# deploy probe hit /healthz over 127.0.0.1/localhost, before any proxy has supplied a real
# Host header. Without this they get a 400 and the container is marked unhealthy forever.
# It widens nothing — gunicorn binds to the loopback only; the proxy owns the public domains.
ALLOWED_HOSTS += [host for host in ("localhost", "127.0.0.1") if host not in ALLOWED_HOSTS]

INTERNAL_IPS = config("DJANGO_INTERNAL_IPS", cast=Csv(), default="127.0.0.1")

CSRF_TRUSTED_ORIGINS = config("DJANGO_CSRF_TRUSTED_ORIGINS", cast=Csv(), default="")


# Application definition

INSTALLED_APPS = [
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.staticfiles",
    # Required by allauth's security-key list template ({% load humanize %}); without it
    # that page raises TemplateSyntaxError.
    "django.contrib.humanize",
    "phonenumber_field",
    "django_countries",
    "lucide",
    # Auth: allauth deliberately WITHOUT django.contrib.sites — it is optional in
    # allauth 65+, and ARCHITECTURE.md §2.4 rejects the Sites framework (Club is
    # the tenant root, not Site).
    "allauth",
    "allauth.account",
    "allauth.mfa",
    "club.apps.ClubConfig",
    "authentication.apps.AuthenticationConfig",
    "members.apps.MembersConfig",
    "teams.apps.TeamsConfig",
    "events.apps.EventsConfig",
    "news.apps.NewsConfig",
    "notifications.apps.NotificationsConfig",
    "formbuilder.apps.FormbuilderConfig",
    "shop.apps.ShopConfig",
    # Platform billing: RosterChief charging the clubs. Not tenant data — see billing/models.py.
    "billing.apps.BillingConfig",
    "waffle",
    "features.apps.FeaturesConfig",
    "controlpanel.apps.ControlpanelConfig",
    # Club-facing UI for team managers, coaches and admins -- not controlpanel (platform
    # staff managing every club) and not the mobile member/parent app below.
    "management.apps.ManagementConfig",
    # The installed PWA -- Member mode first (see design_handoff_rosterchief_platform/
    # README.md); Coach mode is a later phase, deliberately not built yet.
    "mobile.apps.MobileConfig",
    # Public, read-only JSON API for a club's own external website -- see api/urls.py.
    "api.apps.ApiConfig",
]

# Feature flags (django-waffle). The Flag model is swappable, like AUTH_USER_MODEL:
# ours adds a `clubs` M2M so a feature can be turned on per tenant. Because the
# tenant middleware sets request.club, `flag_is_active(request, "x")` just works.
WAFFLE_FLAG_MODEL = "features.Flag"

MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    # Directly after SecurityMiddleware, per WhiteNoise's contract. It serves the collected
    # static files from the app itself, so no shared volume or CDN is needed to add a second
    # app server.
    "whitenoise.middleware.WhiteNoiseMiddleware",
    "django.contrib.sessions.middleware.SessionMiddleware",
    "django.middleware.common.CommonMiddleware",
    "django.middleware.csrf.CsrfViewMiddleware",
    "django.contrib.auth.middleware.AuthenticationMiddleware",
    "allauth.account.middleware.AccountMiddleware",
    "authentication.middleware.RequireMFAMiddleware",
    "club.tenancy.ClubTenantMiddleware",
    # After tenancy: it decides club-vs-platform from request.club, which was just resolved.
    "features.middleware.MaintenanceMiddleware",
    # After maintenance: a club under maintenance closes its public API too, same as
    # everything else on its subdomain.
    "api.middleware.PublicApiCorsMiddleware",
    "django.contrib.messages.middleware.MessageMiddleware",
    "django.middleware.clickjacking.XFrameOptionsMiddleware",
]

# Reload the browser when templates, static files or Python change. Dev only: it injects a
# script tag into every HTML response and serves an open event stream, neither of which
# belongs in production.
#
# Guarded on the module being *importable*, not just on DEBUG: it is a dev dependency, and the
# production image installs with --no-dev. Without the guard, DEBUG=True in a deployed
# container does not merely turn on debugging — it stops the app from starting at all, with a
# ModuleNotFoundError that says nothing about the actual mistake.
BROWSER_RELOAD_AVAILABLE = find_spec("django_browser_reload") is not None

if DEBUG and BROWSER_RELOAD_AVAILABLE:
    INSTALLED_APPS += ["django_browser_reload"]
    MIDDLEWARE += ["django_browser_reload.middleware.BrowserReloadMiddleware"]

AUTHENTICATION_BACKENDS = [
    "django.contrib.auth.backends.ModelBackend",
    "allauth.account.auth_backends.AuthenticationBackend",
]

# Multi-tenancy: base domain whose subdomains resolve to a club, e.g.
# "ajax-united.rosterchief.app" -> the club with slug "ajax-united". Leave
# unset to fall back to generic "slug.example.com" (3+ label) resolution.
ROSTERCHIEF_BASE_DOMAIN = config("ROSTERCHIEF_BASE_DOMAIN", default="")

ROOT_URLCONF = "rosterchief.urls"

AUTH_USER_MODEL = "authentication.User"


# Authentication (django-allauth)

LOGIN_URL = "account_login"
LOGIN_REDIRECT_URL = "/"

# The User model logs in by email and has no username field.
ACCOUNT_USER_MODEL_USERNAME_FIELD = None
ACCOUNT_LOGIN_METHODS = {"email"}
ACCOUNT_SIGNUP_FIELDS = ["email*", "password1*", "password2*"]
ACCOUNT_EMAIL_VERIFICATION = "none"


# Two-factor authentication (allauth.mfa)

MFA_SUPPORTED_TYPES = ["totp", "webauthn", "recovery_codes"]

# Passkeys are a first factor: sign in with Touch ID / a security key alone.
MFA_PASSKEY_LOGIN_ENABLED = True
MFA_PASSKEY_SIGNUP_ENABLED = False

# WebAuthn needs a secure context. Browsers treat *.localhost as secure, but the
# dev server is plain HTTP, so allow the insecure origin while DEBUG.
MFA_WEBAUTHN_ALLOW_INSECURE_ORIGIN = DEBUG

# A passkey is bound to a Relying Party ID (a domain). Our adapter pins it to
# ROSTERCHIEF_BASE_DOMAIN so that ONE passkey works across every club subdomain
# — allauth's default (the request host) would bind it to a single club.
MFA_ADAPTER = "authentication.adapters.RosterChiefMFAAdapter"
MFA_WEBAUTHN_RP_NAME = config("ROSTERCHIEF_RP_NAME", default="RosterChief")

# Where RequireMFAMiddleware sends privileged users who haven't enrolled yet.
MFA_ENROLMENT_URL_NAME = "mfa_index"


# Sessions are shared across club subdomains: log in once and you're authenticated
# on every club (matching the one-passkey-everywhere model). Tenancy still scopes
# what you can *see* — that is the access service's job, not the cookie's.
# Browsers reject a Domain attribute on localhost, so it stays host-only in dev.
SHARED_COOKIE_DOMAIN = f".{ROSTERCHIEF_BASE_DOMAIN}" if ROSTERCHIEF_BASE_DOMAIN and ROSTERCHIEF_BASE_DOMAIN != "localhost" else None

SESSION_COOKIE_DOMAIN = config("DJANGO_SESSION_COOKIE_DOMAIN", default=SHARED_COOKIE_DOMAIN)
CSRF_COOKIE_DOMAIN = config("DJANGO_CSRF_COOKIE_DOMAIN", default=SHARED_COOKIE_DOMAIN)

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        "DIRS": [BASE_DIR / "templates"],
        "APP_DIRS": True,
        "OPTIONS": {
            "context_processors": [
                "django.template.context_processors.request",
                "django.contrib.auth.context_processors.auth",
                "django.contrib.messages.context_processors.messages",
                "club.context_processors.branding",
                "features.context_processors.maintenance",
                "controlpanel.context_processors.job_health",
                "management.context_processors.is_admin",
                "management.context_processors.billing_notice",
                "management.context_processors.management_position",
                "management.context_processors.management_link",
                "management.context_processors.active_nav_section",
                "management.context_processors.news_permissions",
                "management.context_processors.feature_sections",
                "management.context_processors.sidebar_counters",
                "management.context_processors.notification_bell",
            ],
        },
    },
]

WSGI_APPLICATION = "rosterchief.wsgi.application"


# Tests
#
# A custom runner, not extra settings: it swaps in a fast password hasher, the cached
# template loader and a quiet django.request logger while the suite runs. Those belong
# nowhere near a deployed process, and a runner is only ever instantiated by
# `manage.py test` -- see rosterchief/test_runner.py for the full reasoning.
TEST_RUNNER = "rosterchief.test_runner.RosterChiefTestRunner"


# Database
# https://docs.djangoproject.com/en/6.0/ref/settings/#databases

DATABASES = {
    "default": config("DJANGO_DATABASE_URL", default="sqlite:///db.sqlite3", cast=db_url),
}


# Password validation
# https://docs.djangoproject.com/en/6.0/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/6.0/topics/i18n/

LANGUAGE_CODE = "en-us"

TIME_ZONE = config("DJANGO_TIME_ZONE", default="Europe/Brussels", cast=str)

USE_I18N = True

USE_TZ = True


# Cache
#
# Redis in production, and not merely for speed: waffle caches each flag's targeting in the
# Django cache, and LocMemCache is private to one process. Under several gunicorn workers a
# toggle flipped in the control panel flushes ONE worker's cache while the others keep
# serving the stale flag — a feature that "sometimes doesn't turn on". A shared cache is the
# fix, so Redis is required from the first multi-worker deploy, not from the second server.

REDIS_URL = config("DJANGO_REDIS_URL", default="")

CACHES = {"default": {"BACKEND": "django_redis.cache.RedisCache", "LOCATION": REDIS_URL, "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient"}} if REDIS_URL else {"BACKEND": "django.core.cache.backends.locmem.LocMemCache"}}


# Task queue (Celery)
#
# The scheduled platform jobs (see billing/tasks.py, club/tasks.py, events/tasks.py) used to
# be host crontab entries calling `manage.py <command>` -- see DEPLOYMENT.md. They now run as
# Celery tasks on a beat schedule below, tracked in features.models.JobRun and visible on the
# control panel's Jobs tab, which a bare crontab line mailing stderr on failure never gave us.
#
# Same Redis as CACHES above -- one already-deployed instance, not a second broker to run.
# Without DJANGO_REDIS_URL there is nothing to connect to, so tasks run eagerly (inline, in
# the calling process) instead of being queued -- the same "just works with nothing
# configured" fallback CACHES uses, so `manage.py shell` on a laptop with no Redis can still
# exercise a task directly.
#
# CELERY_TASK_EAGER_PROPAGATES is deliberately left at its default (False): a real worker
# never raises a task's exception back into the caller of .delay() either (it's async --
# the caller has moved on long before the task runs), it catches it, marks the result
# FAILURE and fires task_failure so error-tracking (features/signals.py -> JobRun) can react.
# Propagating in eager mode only would make local/test behaviour diverge from production
# *and* skip that signal, silently losing JobRun.error on every eager failure.
CELERY_BROKER_URL = REDIS_URL
CELERY_RESULT_BACKEND = REDIS_URL or None
CELERY_TASK_ALWAYS_EAGER = not REDIS_URL
CELERY_TASK_TRACK_STARTED = True
CELERY_TIMEZONE = TIME_ZONE

#: Mirrors the old crontab times exactly (see DEPLOYMENT.md), with one fix: renew_subscriptions
#: was never actually wired to cron there, despite its own docstring saying it's meant to run
#: on a schedule -- controlpanel.services.statistics.platform_attention()'s `renewals_pending`
#: figure exists specifically to catch that class of gap. Placed before the reminder/archive
#: jobs so a club that renews today isn't chased or archived for a period that just closed.
CELERY_BEAT_SCHEDULE = {
    "extend-event-series": {"task": "events.tasks.extend_event_series", "schedule": crontab(hour=3, minute=0)},
    "renew-subscriptions": {"task": "billing.tasks.renew_subscriptions", "schedule": crontab(hour=4, minute=0)},
    "send-billing-reminders": {"task": "billing.tasks.send_billing_reminders", "schedule": crontab(hour=5, minute=0)},
    "archive-overdue-clubs": {"task": "billing.tasks.archive_overdue_clubs", "schedule": crontab(hour=6, minute=0)},
    "generate-seasons": {"task": "club.tasks.generate_seasons", "schedule": crontab(hour=5, minute=0, day_of_month=1)},
}


# Static files and uploads
# https://docs.djangoproject.com/en/6.0/howto/static-files/

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

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

# Separate from MEDIA_ROOT on purpose: this directory is never served directly (no
# Caddy passthrough, no /media/* route) and every read goes through an authenticated
# Django view -- see rosterchief/storage.py.
PRIVATE_MEDIA_ROOT = BASE_DIR / "private_media"

# Uploads (club logos) go to S3-compatible storage as soon as a bucket is configured. On one
# server the local disk works; on two, a logo uploaded to node A 404s on node B — so this is
# the switch that decides whether "add a server" is an afternoon or a migration.
AWS_STORAGE_BUCKET_NAME = config("AWS_STORAGE_BUCKET_NAME", default="")
AWS_S3_ENDPOINT_URL = config("AWS_S3_ENDPOINT_URL", default="")  # set for Hetzner/Scaleway/Backblaze
AWS_S3_REGION_NAME = config("AWS_S3_REGION_NAME", default="")
AWS_ACCESS_KEY_ID = config("AWS_ACCESS_KEY_ID", default="")
AWS_SECRET_ACCESS_KEY = config("AWS_SECRET_ACCESS_KEY", default="")
AWS_S3_FILE_OVERWRITE = False
AWS_QUERYSTRING_AUTH = False  # logos are public; signed URLs would break browser caching

STORAGES = {
    "default": {"BACKEND": "storages.backends.s3.S3Storage"} if AWS_STORAGE_BUCKET_NAME else {"BACKEND": "django.core.files.storage.FileSystemStorage"},
    # Manifest storage only in production: it demands a collectstatic manifest, and every
    # {% static %} in a test would blow up without one.
    "staticfiles": {"BACKEND": config("DJANGO_STATICFILES_BACKEND", default="django.contrib.staticfiles.storage.StaticFilesStorage")},
}


# HTTPS, behind a reverse proxy
#
# SECURE_PROXY_SSL_HEADER is not optional here: Caddy terminates TLS, so without it Django
# believes every request is plain HTTP. request.is_secure() goes false, allauth and WebAuthn
# disagree with the browser about the origin, and SECURE_SSL_REDIRECT becomes a loop.
SECURE_PROXY_SSL_HEADER = ("HTTP_X_FORWARDED_PROTO", "https")

# Off by default and switched on by the production env, deliberately: defaulting these to
# `not DEBUG` would redirect every test request to https and break the suite anywhere DEBUG
# is unset. `manage.py check --deploy` is what catches a deploy that forgot them.
SECURE_SSL_REDIRECT = config("DJANGO_SECURE_SSL_REDIRECT", default=False, cast=bool)
SESSION_COOKIE_SECURE = config("DJANGO_SESSION_COOKIE_SECURE", default=False, cast=bool)
CSRF_COOKIE_SECURE = config("DJANGO_CSRF_COOKIE_SECURE", default=False, cast=bool)

SECURE_HSTS_SECONDS = config("DJANGO_SECURE_HSTS_SECONDS", default=0, cast=int)
# Every club is a subdomain, so HSTS must cover them all or it protects only the bare domain.
SECURE_HSTS_INCLUDE_SUBDOMAINS = config("DJANGO_SECURE_HSTS_INCLUDE_SUBDOMAINS", default=True, cast=bool)
SECURE_HSTS_PRELOAD = config("DJANGO_SECURE_HSTS_PRELOAD", default=False, cast=bool)


# Logging
#
# Django's default LOGGING gates its console handler behind `require_debug_true`, so with
# DEBUG=False (every real deployment) an unhandled exception becomes a 500 response and leaves
# no trace anywhere — gunicorn's error log only sees WSGI-level crashes, not exceptions Django
# already caught and turned into a response. Without this, `docker compose logs web` is silent
# during exactly the incidents it most needs to explain.
LOGGING = {
    "version": 1,
    "disable_existing_loggers": False,
    "handlers": {
        "console": {"class": "logging.StreamHandler"},
    },
    "loggers": {
        "django.request": {"handlers": ["console"], "level": "ERROR", "propagate": False},
    },
}


# Email
#
# Provider-agnostic on purpose: everything is a plain SMTP setting read from the environment,
# so any provider that speaks SMTP works without a code change. The console backend is the
# DEFAULT rather than the dev-only branch -- a deployment that forgets to configure mail
# should print billing reminders to the log, not raise ConnectionRefused against localhost:25
# on a box with no MTA, which is what Django's own default does.
#
# Resend (resend.com) works either way: point DJANGO_EMAIL_BACKEND at Django's own SMTP
# backend with Resend's SMTP relay credentials, or set it to rosterchief.mail.ResendEmailBackend
# to send through Resend's HTTP API instead (see that module) -- set RESEND_API_KEY either way.
# Every Django-sent email (allauth's password reset included, since it goes through
# django.core.mail like everything else) follows whichever backend is configured here.
EMAIL_BACKEND = config("DJANGO_EMAIL_BACKEND", default="django.core.mail.backends.console.EmailBackend")
EMAIL_HOST = config("DJANGO_EMAIL_HOST", default="")
EMAIL_PORT = config("DJANGO_EMAIL_PORT", default=587, cast=int)
EMAIL_HOST_USER = config("DJANGO_EMAIL_HOST_USER", default="")
EMAIL_HOST_PASSWORD = config("DJANGO_EMAIL_HOST_PASSWORD", default="")
EMAIL_USE_TLS = config("DJANGO_EMAIL_USE_TLS", default=True, cast=bool)
EMAIL_USE_SSL = config("DJANGO_EMAIL_USE_SSL", default=False, cast=bool)
EMAIL_TIMEOUT = config("DJANGO_EMAIL_TIMEOUT", default=10, cast=int)

#: Only read by rosterchief.mail.ResendEmailBackend -- irrelevant for the SMTP backend
#: (which would use EMAIL_HOST_PASSWORD, e.g. Resend's own SMTP relay, instead).
RESEND_API_KEY = config("RESEND_API_KEY", default="")

DEFAULT_FROM_EMAIL = config("DJANGO_DEFAULT_FROM_EMAIL", default="RosterChief <noreply@rosterchief.app>")
SERVER_EMAIL = config("DJANGO_SERVER_EMAIL", default=DEFAULT_FROM_EMAIL)

#: Where a club admin is told to direct a billing question. Shown in reminder emails.
BILLING_CONTACT_EMAIL = config("ROSTERCHIEF_BILLING_CONTACT_EMAIL", default=DEFAULT_FROM_EMAIL)

# Web Push (mobile app, see mobile/services/push.py) -- one VAPID keypair for the whole
# platform, not per club: it identifies the *sender* (RosterChief) to a browser's push
# service, the same way DEFAULT_FROM_EMAIL identifies the sender of an email, and has
# nothing to do with club branding. Generate a pair with `uv run vapid --gen`. Blank in
# dev is fine -- mobile.services.push.send_push_to_member no-ops without a private key.
VAPID_PUBLIC_KEY = config("DJANGO_VAPID_PUBLIC_KEY", default="")
VAPID_PRIVATE_KEY = config("DJANGO_VAPID_PRIVATE_KEY", default="")
VAPID_ADMIN_EMAIL = config("DJANGO_VAPID_ADMIN_EMAIL", default="admin@rosterchief.app")


# Phone numbers (django-phonenumber-field)

PHONENUMBER_DEFAULT_REGION = "BE"
PHONENUMBER_DB_FORMAT = "E164"