"""
Django settings for breccia_mapper project.

Generated by 'django-admin startproject' using Django 2.2.9.

For more information on this file, see
https://docs.djangoproject.com/en/2.2/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/2.2/ref/settings/

Before production deployment, see
https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/


Many configuration settings are input from `settings.ini`.
The most likely required settings are: SECRET_KEY, DEBUG, ALLOWED_HOSTS, DATABASE_URL, PROJECT_*_NAME, EMAIL_*

- PARENT_PROJECT_NAME
  default: Parent Project Name
  Displayed in templates where the name of the parent project should be used

- PROJECT_LONG_NAME
  default: Project Long Name
  Displayed in templates where the full name of the project should be used

- PROJECT_SHORT_NAME
  default: shortname
  Displayed in templates where a short identifier for the project should be used

- SECRET_KEY (REQUIRED)
  Used to generate CSRF tokens - must never be made public

- DEBUG
  default: False
  Should the server run in debug mode?  Provides information to users which is unsafe in production

- ALLOWED_HOSTS
  default: * if DEBUG else localhost
  Accepted values for server header in request - protects against CSRF and CSS attacks

- DATABASE_URL
  default: sqlite://db.sqlite3
  URL to database - uses format described at https://github.com/jacobian/dj-database-url

- DBBACKUP_STORAGE_LOCATION
  default: .dbbackup
  Directory where database backups should be stored

- LANGUAGE_CODE
  default: en-gb
  Default language - used for translation - has not been enabled

- TIME_ZONE
  default: UTC
  Default timezone

- LOG_LEVEL
  default: INFO
  Level of messages written to log file

- LOG_FILENAME
  default: debug.log
  Path to logfile

- LOG_DAYS
  default: 14
  Number of days of logs to keep - logfile is rotated out at the end of each day

- EMAIL_HOST
  default: None
  Hostname of SMTP server

- DEFAULT_FROM_EMAIL
  default: None
  Email address from which messages are sent

- EMAIL_FILE_PATH (debug only)
  default: mail.log
  Directory where emails will be stored if not using an SMTP server

- EMAIL_HOST_USER
  default: None
  Username to authenticate with SMTP server

- EMAIL_HOST_PASSWORD
  default: None
  Password to authenticate with SMTP server

- EMAIL_PORT
  default: 25
  Port to access on SMTP server

- EMAIL_USE_TLS
  default: True if EMAIL_PORT == 587 else False
  Use TLS to communicate with SMTP server?  Usually on port 587

- EMAIL_USE_SSL
  default: True if EMAIL_PORT == 465 else False
  Use SSL to communicate with SMTP server?  Usually on port 465

- GOOGLE_MAPS_API_KEY
  default: None
  Google Maps API key to display maps of people's locations
"""

import collections
import logging
import logging.config
import pathlib

from django.urls import reverse_lazy

from decouple import config, Csv
import dj_database_url

# Settings exported to templates
# https://github.com/jakubroztocil/django-settings-export

SETTINGS_EXPORT = [
    'DEBUG',
    'PARENT_PROJECT_NAME',
    'PROJECT_LONG_NAME',
    'PROJECT_SHORT_NAME',
    'GOOGLE_MAPS_API_KEY',
]

PARENT_PROJECT_NAME = config('PARENT_PROJECT_NAME',
                             default='Parent Project Name')
PROJECT_LONG_NAME = config('PROJECT_LONG_NAME', default='Project Long Name')
PROJECT_SHORT_NAME = config('PROJECT_SHORT_NAME', default='shortname')

# Build paths inside the project like this: BASE_DIR.joinpath(...)
BASE_DIR = pathlib.Path(__file__).parent.parent

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

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

ALLOWED_HOSTS = config(
    'ALLOWED_HOSTS',
    default='*' if DEBUG else '127.0.0.1,localhost,localhost.localdomain',
    cast=Csv())

# Application definition

DJANGO_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

THIRD_PARTY_APPS = [
    'bootstrap4',
    'constance',
    'constance.backends.database',
    'dbbackup',
    'django_countries',
    'django_select2',
    'rest_framework',
    'post_office',
    'bootstrap_datepicker_plus',
    'hijack',
    'compat',
]

FIRST_PARTY_APPS = [
    'people',
    'activities',
    'export',
]

INSTALLED_APPS = DJANGO_APPS + THIRD_PARTY_APPS + FIRST_PARTY_APPS

MIDDLEWARE = [
    '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 = 'breccia_mapper.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [BASE_DIR.joinpath('breccia_mapper', 'templates')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django_settings_export.settings_export',
                'constance.context_processors.config',
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'breccia_mapper.wsgi.application'

# Database
# https://docs.djangoproject.com/en/2.2/ref/settings/#databases

DATABASES = {
    'default':
    config('DATABASE_URL',
           default='sqlite:///' + str(BASE_DIR.joinpath('db.sqlite3')),
           cast=dj_database_url.parse)
}

# Django DBBackup
# https://django-dbbackup.readthedocs.io/en/stable/index.html

DBBACKUP_STORAGE = 'django.core.files.storage.FileSystemStorage'
DBBACKUP_STORAGE_OPTIONS = {
    'location':
    config('DBBACKUP_STORAGE_LOCATION',
           default=BASE_DIR.joinpath('.dbbackup')),
}

# Django REST Framework
# https://www.django-rest-framework.org/

REST_FRAMEWORK = {
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.IsAuthenticated',
    ],
    'DEFAULT_RENDERER_CLASSES': [
        'rest_framework.renderers.JSONRenderer',
        'rest_framework_csv.renderers.CSVRenderer',
        'rest_framework.renderers.BrowsableAPIRenderer',
    ],
}

# Password validation
# https://docs.djangoproject.com/en/2.2/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',
    },
]

# Custom user model
# https://docs.djangoproject.com/en/2.2/topics/auth/customizing/#using-a-custom-user-model-when-starting-a-project

AUTH_USER_MODEL = 'people.User'

# Login flow

LOGIN_URL = reverse_lazy('login')

LOGIN_REDIRECT_URL = reverse_lazy('people:person.profile')

# Internationalization
# https://docs.djangoproject.com/en/2.2/topics/i18n/

LANGUAGE_CODE = config('LANGUAGE_CODE', default='en-gb')

TIME_ZONE = config('TIME_ZONE', default='UTC')

USE_I18N = True

USE_L10N = True

USE_TZ = True

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.2/howto/static-files/

STATIC_URL = '/static/'

STATIC_ROOT = BASE_DIR.joinpath('static')

STATICFILES_DIRS = [BASE_DIR.joinpath('breccia_mapper', 'static')]

# Logging - NB the logger name is empty to capture all output

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'handlers': {
        'file': {
            'level': config('LOG_LEVEL', default='INFO'),
            'class': 'logging.handlers.TimedRotatingFileHandler',
            'filename': config('LOG_FILENAME', default='debug.log'),
            'when': 'midnight',
            'backupCount': config('LOG_DAYS', default=14, cast=int),
            'formatter': 'timestamped',
        },
        'console': {
            'level': config('LOG_LEVEL', default='INFO'),
            'class': 'logging.StreamHandler',
            'formatter': 'timestamped',
        },
    },
    'loggers': {
        '': {
            'handlers': ['console', 'file'],
            'level': config('LOG_LEVEL', default='INFO'),
            'propagate': True,
        },
    },
    'formatters': {
        'timestamped': {
            'format': '[{asctime} {levelname} {module} {funcName}] {message}',
            'style': '{',
        }
    }
}

# Initialise logger now so we can use it in this file

LOGGING_CONFIG = None
logging.config.dictConfig(LOGGING)
logger = logging.getLogger(__name__)  # pylint: disable=invalid-name

# Admin panel variables

CONSTANCE_CONFIG = {
    'NOTICE_TEXT': (
        '',
        'Text to be displayed in a notice banner at the top of every page.'),
    'NOTICE_CLASS': (
        'alert-warning',
        'CSS class to use for background of notice banner.'),
    'CONSENT_TEXT': (
        'This is template consent text and should have been replaced. Please contact an admin.',
        'Text to be displayed to ask for consent for data collection.'),
    'PERSON_LIST_HELP': (
        '',
        'Help text to display at the top of the people list.'),
    'ORGANISATION_LIST_HELP': (
        '',
        'Help text to display at the top of the organisaton list.'),
}  # yapf: disable

CONSTANCE_CONFIG_FIELDSETS = {
    'Notice Banner': (
        'NOTICE_TEXT',
        'NOTICE_CLASS',
    ),
    'Data Collection': ('CONSENT_TEXT', ),
    'Help Text': ('PERSON_LIST_HELP', 'ORGANISATION_LIST_HELP'),
}

CONSTANCE_BACKEND = 'constance.backends.database.DatabaseBackend'

# Django Hijack settings
# See https://django-hijack.readthedocs.io/en/stable/

HIJACK_USE_BOOTSTRAP = True

# Bootstrap settings
# See https://django-bootstrap4.readthedocs.io/en/latest/settings.html

BOOTSTRAP4 = {
    'include_jquery': 'full',
}

# Email backend settings
# See https://docs.djangoproject.com/en/3.0/topics/email

EMAIL_HOST = config('EMAIL_HOST', default=None)
DEFAULT_FROM_EMAIL = config(
    'DEFAULT_FROM_EMAIL',
    default=f'{PROJECT_SHORT_NAME}@localhost.localdomain')
SERVER_EMAIL = DEFAULT_FROM_EMAIL

if EMAIL_HOST is None:
    EMAIL_BACKEND = 'django.core.mail.backends.filebased.EmailBackend'
    EMAIL_FILE_PATH = config('EMAIL_FILE_PATH',
                             default=str(BASE_DIR.joinpath('mail.log')))

else:
    EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
    EMAIL_HOST_USER = config('EMAIL_HOST_USER', default=None)
    EMAIL_HOST_PASSWORD = config('EMAIL_HOST_PASSWORD', default=None)

    EMAIL_PORT = config('EMAIL_PORT', default=25, cast=int)
    EMAIL_USE_TLS = config('EMAIL_USE_TLS',
                           default=(EMAIL_PORT == 587),
                           cast=bool)
    EMAIL_USE_SSL = config('EMAIL_USE_SSL',
                           default=(EMAIL_PORT == 465),
                           cast=bool)

# Upstream API keys

GOOGLE_MAPS_API_KEY = config('GOOGLE_MAPS_API_KEY', default=None)

# Import customisation app settings if present

try:
    from custom.settings import (
        CUSTOMISATION_NAME,
        TEMPLATE_NAME_INDEX,
        TEMPLATE_WELCOME_EMAIL_NAME,
        CONSTANCE_CONFIG as constance_config_custom,
        CONSTANCE_CONFIG_FIELDSETS as constance_config_fieldsets_custom
    )  # yapf: disable

    CONSTANCE_CONFIG.update(constance_config_custom)
    CONSTANCE_CONFIG_FIELDSETS.update(constance_config_fieldsets_custom)

    INSTALLED_APPS.append('custom')
    logger.info("Loaded customisation app: %s", CUSTOMISATION_NAME)

except ImportError as exc:
    logger.info("No customisation app loaded: %s", exc)

    # Set default values if no customisations loaded
    CUSTOMISATION_NAME = None
    TEMPLATE_NAME_INDEX = 'index.html'
    TEMPLATE_WELCOME_EMAIL_NAME = 'welcome-email'