"""
Django settings for mysite project.

Generated by 'django-admin startproject' using Django 6.0.5.

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/
"""

import copy
import os
from pathlib import Path

import pymysql  # type: ignore[import-not-found]
from django.contrib.messages import constants as dj_msg
from django.core.exceptions import ImproperlyConfigured
from django.urls import reverse_lazy
from django.utils.translation import gettext_lazy as _
from dotenv import load_dotenv

from mysite.subpath_utils import resolve_site_subpath

pymysql.install_as_MySQLdb()

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


# 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 = os.getenv("SECRET_KEY", "change-me-in-env")

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = os.getenv("DEBUG", "True").lower() in {"1", "true", "yes", "on"}

ALLOWED_HOSTS = [h.strip() for h in os.getenv("ALLOWED_HOSTS", "127.0.0.1,localhost,paython.test").split(",") if h.strip()]
CSRF_TRUSTED_ORIGINS = [
    origin.strip()
    for origin in os.getenv(
        "CSRF_TRUSTED_ORIGINS",
        "http://127.0.0.1,http://localhost,http://paython.test",
    ).split(",")
    if origin.strip()
]
SITE_URL = os.getenv("SITE_URL", "http://127.0.0.1:8000")

# Deploy under a URL prefix (no leading/trailing slashes); leave empty for domain root.
# Required on Bluehost/cPanel subfolders when the app is not at web root.
# Env: SITE_SUBPATH, DJANGO_SITE_SUBPATH, or FORCE_DEPLOY_SUBPATH; or file
# ``mysite/deploy_subpath.txt`` / project-root ``DEPLOY_SUBPATH.txt`` (see ``subpath_utils``).
SITE_SUBPATH = resolve_site_subpath()
FORCE_SCRIPT_NAME = f"/{SITE_SUBPATH}" if SITE_SUBPATH else None
if SITE_SUBPATH:
    SESSION_COOKIE_PATH = f"/{SITE_SUBPATH}/"

# Staff dashboard: when True, non-superuser staff need explicit permissions (or ``dashboard_full_access``).
# Security-first default: enforced unless explicitly disabled.
DASHBOARD_ENFORCE_PERMISSIONS = os.getenv("DASHBOARD_ENFORCE_PERMISSIONS", "true").strip().lower() in {
    "1",
    "true",
    "yes",
    "on",
}

# Dashboard entity forms: translate buttons between *_en / *_ar fields (Google via deep-translator).
DASHBOARD_TRANSLATE_ENABLED = os.getenv("DASHBOARD_TRANSLATE_ENABLED", "true").strip().lower() in {
    "1",
    "true",
    "yes",
    "on",
}
# Parallel Google Translate calls for long HTML articles (1–12, default 6).
try:
    DASHBOARD_TRANSLATE_MAX_WORKERS = int(os.getenv("DASHBOARD_TRANSLATE_MAX_WORKERS", "6"))
except ValueError:
    DASHBOARD_TRANSLATE_MAX_WORKERS = 6

# Email (SMTP). Mirrors Laravel .env: MAIL_HOST, MAIL_PORT, etc.
_mail_backend = os.getenv("EMAIL_BACKEND") or os.getenv("MAIL_MAILER", "")
if _mail_backend in {"", "smtp"}:
    EMAIL_BACKEND = "django.core.mail.backends.smtp.EmailBackend"
elif _mail_backend == "console":
    EMAIL_BACKEND = "django.core.mail.backends.console.EmailBackend"
else:
    EMAIL_BACKEND = _mail_backend

EMAIL_HOST = os.getenv("EMAIL_HOST") or os.getenv("MAIL_HOST", "")
EMAIL_PORT = int(os.getenv("EMAIL_PORT") or os.getenv("MAIL_PORT", "587"))
EMAIL_HOST_USER = os.getenv("EMAIL_HOST_USER") or os.getenv("MAIL_USERNAME", "")
EMAIL_HOST_PASSWORD = os.getenv("EMAIL_HOST_PASSWORD") or os.getenv("MAIL_PASSWORD", "")
_mail_enc = (os.getenv("EMAIL_USE_TLS") or os.getenv("MAIL_ENCRYPTION", "tls")).strip().lower()
if _mail_enc in {"tls", "starttls", "1", "true", "yes"}:
    EMAIL_USE_TLS = True
    EMAIL_USE_SSL = False
elif _mail_enc in {"ssl", "smtps"}:
    EMAIL_USE_TLS = False
    EMAIL_USE_SSL = True
else:
    EMAIL_USE_TLS = os.getenv("EMAIL_USE_TLS", "True").lower() in {"1", "true", "yes", "on"}
    EMAIL_USE_SSL = os.getenv("EMAIL_USE_SSL", "").lower() in {"1", "true", "yes", "on"}

_default_from = (
    os.getenv("DEFAULT_FROM_EMAIL")
    or os.getenv("MAIL_FROM_ADDRESS")
    or os.getenv("EMAIL_HOST_USER")
    or os.getenv("MAIL_USERNAME")
    or ""
)
DEFAULT_FROM_EMAIL = _default_from or "webmaster@localhost"
SERVER_EMAIL = DEFAULT_FROM_EMAIL

# Display name in email subjects (Laravel MAIL_FROM_NAME / APP_NAME fallback).
EMAIL_SITE_BRAND_NAME = (
    os.getenv("MAIL_FROM_NAME", "").strip()
    or os.getenv("APP_NAME", "").strip()
    or "Paython"
)

# Custom content dashboard (/en/admin/…) is staff-only; auth URLs stay outside locale prefix for simplicity.
LOGIN_URL = reverse_lazy("login")
LOGIN_REDIRECT_URL = reverse_lazy("dashboard_home")
LOGOUT_REDIRECT_URL = reverse_lazy("login")
TWO_FACTOR_PATCH_ADMIN = True
# Optional hard enforcement: require OTP-verified staff sessions on /admin/*
TWO_FACTOR_ENFORCE_STAFF = os.getenv("TWO_FACTOR_ENFORCE_STAFF", "false").strip().lower() in {
    "1",
    "true",
    "yes",
    "on",
}


# Application definition

INSTALLED_APPS = [
    'corsheaders',
    'tinymce',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django_otp',
    'django_otp.plugins.otp_totp',
    'django_otp.plugins.otp_static',
    'two_factor',
    'mainapp',
    'legacydb',
]

MIDDLEWARE = [
    'mysite.middleware.StripDeploySubpathMiddleware',
    'mysite.middleware.NormalizeScriptNameMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    'mysite.middleware.SpiderTrapRedirectMiddleware',
    'mainapp.middleware.redirect_middleware.RedirectRulesMiddleware',
    'django.middleware.security.SecurityMiddleware',
    'mysite.security_middleware.SecurityHeadersMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'mainapp.middleware.menu_access_middleware.PublishedMenuAccessMiddleware',
    'django_otp.middleware.OTPMiddleware',
    'mysite.middleware.TwoFactorLoginRateLimitMiddleware',
    'mysite.middleware.StaffDashboardRoutingMiddleware',
    'mysite.middleware.StaffOtpEnforceMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

SESSION_COOKIE_HTTPONLY = True
SESSION_COOKIE_SAMESITE = os.getenv("SESSION_COOKIE_SAMESITE", "Lax")
CSRF_COOKIE_HTTPONLY = True

ROOT_URLCONF = 'mysite.urls'

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',
                'mainapp.context.navigation.site_header_data',
                'mainapp.context.branding.site_configuration',
                'mainapp.context.dashboard.dashboard_nav',
            ],
        },
    },
]

WSGI_APPLICATION = 'mysite.wsgi.application'


# Database
# https://docs.djangoproject.com/en/6.0/ref/settings/#databases
#
# Default is MySQL via PyMySQL (see top of file). Legacy Laravel tables use the
# ``mysql_source`` alias — if ``MYSQL_SOURCE_NAME`` is unset and ``default`` is
# MySQL, both point at the same database (typical on cPanel: one DB for Django + Laravel).
# Use PostgreSQL only if you set ``DB_ENGINE=django.db.backends.postgresql`` and install psycopg.
#
_default_engine = os.getenv("DB_ENGINE", "django.db.backends.mysql")
_default_is_mysql = "mysql" in _default_engine

_default_user = os.getenv("DB_USER", "").strip()
if not _default_user:
    _default_user = "root" if _default_is_mysql else "postgres"

_default_port = os.getenv(
    "DB_PORT",
    "3306" if _default_is_mysql else "5432",
)

_default_db = {
    "ENGINE": _default_engine,
    "NAME": os.getenv("DB_NAME", "paython_db"),
    "USER": _default_user,
    "PASSWORD": os.getenv("DB_PASSWORD", ""),
    "HOST": os.getenv("DB_HOST", "127.0.0.1"),
    "PORT": _default_port,
}
if _default_is_mysql:
    _default_db["OPTIONS"] = {"charset": "utf8mb4"}

_mysql_src_name = os.getenv("MYSQL_SOURCE_NAME", "").strip()
if _mysql_src_name:
    _mysql_source_db = {
        "ENGINE": os.getenv("MYSQL_SOURCE_ENGINE", "django.db.backends.mysql"),
        "NAME": _mysql_src_name,
        "USER": os.getenv("MYSQL_SOURCE_USER", "root"),
        "PASSWORD": os.getenv("MYSQL_SOURCE_PASSWORD", ""),
        "HOST": os.getenv("MYSQL_SOURCE_HOST", "127.0.0.1"),
        "PORT": os.getenv("MYSQL_SOURCE_PORT", "3306"),
        "OPTIONS": {"charset": "utf8mb4"},
    }
elif _default_is_mysql:
    _mysql_source_db = copy.deepcopy(_default_db)
else:
    _mysql_source_db = {
        "ENGINE": os.getenv("MYSQL_SOURCE_ENGINE", "django.db.backends.mysql"),
        "NAME": os.getenv("MYSQL_SOURCE_NAME", "carpay-dev"),
        "USER": os.getenv("MYSQL_SOURCE_USER", "root"),
        "PASSWORD": os.getenv("MYSQL_SOURCE_PASSWORD", ""),
        "HOST": os.getenv("MYSQL_SOURCE_HOST", "127.0.0.1"),
        "PORT": os.getenv("MYSQL_SOURCE_PORT", "3306"),
        "OPTIONS": {"charset": "utf8mb4"},
    }

DATABASES = {
    "default": _default_db,
    "mysql_source": _mysql_source_db,
}


# 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"

LANGUAGES = [
    ("ar", _("Arabic")),
    ("en", _("English")),
    #("de", _("German")),
    # ("fr", _("French")),
    #("es", _("Spanish")),
]

TIME_ZONE = 'UTC'

USE_I18N = True
LOCALE_PATHS = [BASE_DIR / "locale"]

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/6.0/howto/static-files/
#
# When SITE_SUBPATH is set (e.g. app in public_html/newpythoon/), URLs must include that
# segment or browsers request /static/... at domain root and the server 404s.

STATIC_ROOT = BASE_DIR / "static"
MEDIA_ROOT = BASE_DIR / "media"
if SITE_SUBPATH:
    _deploy_prefix = f"/{SITE_SUBPATH}"
    STATIC_URL = f"{_deploy_prefix}/static/"
    MEDIA_URL = f"{_deploy_prefix}/media/"
else:
    STATIC_URL = "/static/"
    MEDIA_URL = "/media/"

# Dashboard upload limits (Megabytes); override via environment.
DASHBOARD_UPLOAD_MAX_MB_IMAGE = int(os.getenv("DASHBOARD_UPLOAD_MAX_MB_IMAGE", "8"))
DASHBOARD_UPLOAD_MAX_MB_PDF = int(os.getenv("DASHBOARD_UPLOAD_MAX_MB_PDF", "15"))
DASHBOARD_UPLOAD_MAX_MB_IMPORT = int(os.getenv("DASHBOARD_UPLOAD_MAX_MB_IMPORT", "5"))

# Comma-separated list, no dots required — e.g. "jpg,jpeg,png,webp,gif".
DASHBOARD_UPLOAD_IMAGE_EXT_CSV = os.getenv(
    "DASHBOARD_UPLOAD_IMAGE_EXT_CSV", "jpg,jpeg,png,webp,gif"
)

# Public contact form limits
CONTACT_FORM_MAX_MESSAGE_LEN = int(os.getenv("CONTACT_FORM_MAX_MESSAGE_LEN", "5000"))
CONTACT_FORM_RATE_LIMIT_MAX = int(os.getenv("CONTACT_FORM_RATE_LIMIT_MAX", "5"))
CONTACT_FORM_RATE_LIMIT_WINDOW = int(os.getenv("CONTACT_FORM_RATE_LIMIT_WINDOW", "300"))

LOGIN_RATE_LIMIT_MAX = int(os.getenv("LOGIN_RATE_LIMIT_MAX", "10"))
LOGIN_RATE_LIMIT_WINDOW = int(os.getenv("LOGIN_RATE_LIMIT_WINDOW", "900"))

TRUST_PROXY_FOR_CLIENT_IP = os.getenv("USE_X_FORWARDED_PROTO", "").lower() in {
    "1",
    "true",
    "yes",
    "on",
}

DJANGO_ADMIN_ENABLED = os.getenv("DJANGO_ADMIN_ENABLED", "true").lower() in {
    "1",
    "true",
    "yes",
    "on",
}

SECURITY_HEADERS_ENABLED = os.getenv("SECURITY_HEADERS_ENABLED", "true").lower() in {
    "1",
    "true",
    "yes",
    "on",
}

# Dashboard loads Bootstrap/Font Awesome from CDNs — include those hosts in style/script/font-src.
_CSP_STYLE_CDNS = "https://cdn.jsdelivr.net https://cdnjs.cloudflare.com"
# GTM / GA4 / Maps / reCAPTCHA script hosts (Tag Assistant needs googletagmanager + analytics).
_CSP_SCRIPT_CDNS = (
    "https://cdn.jsdelivr.net "
    "https://www.google.com https://www.gstatic.com "
    "https://www.googletagmanager.com https://www.google-analytics.com "
    "https://ssl.google-analytics.com https://tagmanager.google.com"
)
_CSP_CONNECT_CDNS = (
    "https://cdn.jsdelivr.net https://cdnjs.cloudflare.com "
    "https://www.googletagmanager.com https://www.google-analytics.com "
    "https://analytics.google.com https://stats.g.doubleclick.net "
    "https://region1.google-analytics.com"
)
# Google Maps + reCAPTCHA (contact form) + GTM noscript iframe.
_CSP_FRAME_SRC = (
    "https://www.google.com https://maps.google.com https://www.recaptcha.net "
    "https://www.googletagmanager.com"
)
_CONTENT_SECURITY_POLICY_DEFAULT = (
    "default-src 'self'; "
    f"script-src 'self' 'unsafe-inline' 'unsafe-eval' {_CSP_SCRIPT_CDNS}; "
    f"style-src 'self' 'unsafe-inline' {_CSP_STYLE_CDNS}; "
    "img-src 'self' data: https: http:; "
    f"font-src 'self' data: https: {_CSP_STYLE_CDNS}; "
    f"connect-src 'self' {_CSP_CONNECT_CDNS}; "
    f"frame-src 'self' {_CSP_FRAME_SRC}; "
    "frame-ancestors 'none'; "
    "base-uri 'self'; "
    "form-action 'self'"
)
CONTENT_SECURITY_POLICY = os.getenv("CONTENT_SECURITY_POLICY", _CONTENT_SECURITY_POLICY_DEFAULT)

_redis_url = os.getenv("REDIS_URL", "").strip()
if _redis_url:
    CACHES = {
        "default": {
            "BACKEND": "django.core.cache.backends.redis.RedisCache",
            "LOCATION": _redis_url,
        }
    }
else:
    CACHES = {
        "default": {
            "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
            "LOCATION": "paython-default",
        }
    }

RATE_LIMIT_DEFAULT_MAX = CONTACT_FORM_RATE_LIMIT_MAX
RATE_LIMIT_DEFAULT_WINDOW = CONTACT_FORM_RATE_LIMIT_WINDOW

# Production HTTPS / cookie hardening (when DEBUG is False)
if not DEBUG:
    if SECRET_KEY in {"", "change-me-in-env", "change-me"}:
        raise ImproperlyConfigured(
            "Set a strong SECRET_KEY in the environment before running with DEBUG=False."
        )

    SECURE_SSL_REDIRECT = os.getenv("SECURE_SSL_REDIRECT", "true").lower() in {
        "1",
        "true",
        "yes",
        "on",
    }
    SESSION_COOKIE_SECURE = True
    CSRF_COOKIE_SECURE = True
    SECURE_BROWSER_XSS_FILTER = True
    SECURE_CONTENT_TYPE_NOSNIFF = True
    X_FRAME_OPTIONS = "DENY"
    SECURE_HSTS_SECONDS = int(os.getenv("SECURE_HSTS_SECONDS", "31536000"))
    SECURE_HSTS_INCLUDE_SUBDOMAINS = True
    SECURE_HSTS_PRELOAD = os.getenv("SECURE_HSTS_PRELOAD", "").lower() in {
        "1",
        "true",
        "yes",
        "on",
    }
    if os.getenv("USE_X_FORWARDED_PROTO", "").lower() in {"1", "true", "yes", "on"}:
        SECURE_PROXY_SSL_HEADER = ("HTTP_X_FORWARDED_PROTO", "https")

MESSAGE_TAGS = {
    dj_msg.DEBUG: "secondary",
    dj_msg.INFO: "info",
    dj_msg.SUCCESS: "success",
    dj_msg.WARNING: "warning",
    dj_msg.ERROR: "danger",
}

TINYMCE_DEFAULT_CONFIG = {
    "license_key": "gpl",
    "height": 320,
    "menubar": False,
    "plugins": "advlist autolink lists link image charmap preview anchor searchreplace visualblocks code fullscreen insertdatetime media table help wordcount",
    "toolbar": "undo redo | blocks | bold italic underline | bullist numlist | link image | alignleft aligncenter alignright | removeformat | code",
}

# CORS — allow Next.js (or other headless frontends) to call /api/v1/
# Comma-separated origins in .env, e.g. CORS_ALLOWED_ORIGINS=http://localhost:3000,https://example.com
CORS_ALLOWED_ORIGINS = [
    origin.strip()
    for origin in os.getenv("CORS_ALLOWED_ORIGINS", "http://localhost:3000,http://127.0.0.1:3000").split(",")
    if origin.strip()
]
CORS_URLS_REGEX = r"^/api/.*$"
CORS_ALLOW_HEADERS = (
    "accept",
    "accept-language",
    "authorization",
    "content-type",
    "origin",
    "x-requested-with",
)