#! /bin/bash
set -e

# Check if $DATABASE_URL is defined, if not, use a standard sqlite database.
#
# If the $DATABASE_URL is defined and is postgres, check if it is available
# yet. Do not start the container before the postgresql boots up.
#
# If the $DATABASE_URL is defined and is mysql, check if the database is
# available before the container boots up.
#
# TODO: Check the database type and detect if it is up based on that. For now,
# assume that postgres is being used if DATABASE_URL is defined.
if [[ -z "$DATABASES_URL" ]]; then
	echo "$DATABASE_URL is not defined. Using sqlite database..."
	DATABASE_URL="sqlite:///opt/mailman-web-data/database/mailmanweb.db"
	DATABASE_TYPE='sqlite'
	if [[ ! -e "/opt/mailman-web-data/database" ]]; then
		mkdir -p /opt/mailman-web-data/database/
	fi
else
	DATABASE_TYPE='postgres'
	wait_for_postgres()
fi

function wait_for_postgres {
	# Check if the postgres database is up and accepting connections before
	# moving forward.
	# TODO: Use python's psycopg2 module to do this in python instead of
	# installing postgres-client in the image.
	until psql $DATABASE_URL -c '\l'; do
		>&2 echo "Postgres is unavailable - sleeping"
		sleep 1
	done
	>&2 echo "Postgres is up - continuing"
}

function check_or_create {
	# Check if the path exists, if not, create the directory.
	if [[ ! -e dir ]]; then
		echo "$1 does not exist, creating ..."
		mkdir "$1"
	fi
}

# Check if we are in the correct directory before running commands.
if [[ ! $(pwd) == '/opt/mailman-web' ]]; then
	echo "Running in the wrong directory...switching to /opt/mailman-web"
	cd /opt/mailman-web
fi

# Check if the logs directory is setup.

if [[ ! -e /opt/mailman-web-data/logs/mailmanweb.log ]]; then
	echo "Creating log file for mailman web"
	mkdir -p /opt/mailman-web-data/logs/
	touch /opt/mailman-web-data/logs/mailmanweb.log
fi

if [[ ! -e /opt/mailman-web-data/logs/mailmanweb.log ]]; then
	echo "Creating log file for uwsgi.."
	touch /opt/mailman-web-data/logs/uwsgi.log
fi

# Check if the settings_local.py file exists, if yes, copy it too.
if [[ -e /opt/mailman-web-data/settings_local.py ]]; then
	echo "Copying settings_local.py ..."
	cp /opt/mailman-web-data/settings_local.py /opt/mailman-web/settings_local.py
else
	echo "settings_local.py not found, it is highly recommended that you provide one/"
	echo "Using default configuration to run."
fi

# Collect static for the django installation.
python manage.py collectstatic --noinput

# Migrate all the data to the database if this is a new installation, otherwise
# this command will upgrade the database.
python manage.py migrate

# Check if there is a non-standard location for logging defined.
# It can be changed by $UWSGI_LOG_URL environment variable, which if not set points
# to /opt/mailman-web/logs/uwsgi.log
# It can also point to a logging daemon accessible at a URL.
if [[ -z "$UWSGI_LOG_URL" ]]; then
	echo "No $UWSGI_LOG_URL defined, logging uwsgi to /opt/mailman-web-data/logs/uwsgi.log ..."
	UWSGI_LOG_URL='/opt/mailman-web-data/logs/uwsgi.log'
	if [[ ! -e "$UWSGI_LOG_URL" ]]; then
		touch "$UWSGI_LOG_URL"
	fi
fi

# Run the web server.
uwsgi --http-auto-chunked --http-keepalive --logto "$UWSGI_LOG_URL"