#!/bin/sh
set -e

chmod +x /parseurl.py
/parseurl.py ETHERPAD_DB_
eval "$(/parseurl.py ETHERPAD_DB_)"

# ETHERPAD_DB_PASSWORD is mandatory in mysql container, so we're not offering
# any default. If we're linked to MySQL through legacy link, then we can try
# using the password from the env variable MYSQL_ENV_MYSQL_ROOT_PASSWORD
# if [ "$ETHERPAD_DB_USERNAME" = 'root' ]; then
# 	: ${ETHERPAD_DB_PASSWORD:=$MYSQL_ENV_MYSQL_ROOT_PASSWORD}
# fi

if [ -z "$ETHERPAD_DB_USERNAME" ]; then 
	echo >&2 'error: missing required ETHERPAD_DB_USERNAME environment variable'
	echo >&2 '  Did you forget to -e ETHERPAD_DB_USERNAME=... ?'
	exit 1
fi

if [ -z "$ETHERPAD_DB_PASSWORD" ]; then
	echo >&2 'error: missing required ETHERPAD_DB_PASSWORD environment variable'
	echo >&2 '  Did you forget to -e ETHERPAD_DB_PASSWORD=... ?'
	exit 1
fi

RANDOM_STRING="$(node -p "require('crypto').randomBytes(32).toString('hex')")}"

# Sanitize DB information
ETHERPAD_DB_HOST="${ETHERPAD_DB_HOST:-}"
ETHERPAD_DB_PORT="${ETHERPAD_DB_PORT:-3306}"

# Sanitize etherpad info
ETHERPAD_PORT="${ETHERPAD_PORT:-9001}"
ETHERPAD_SESSION_KEY="${ETHERPAD_SESSION_KEY:-$RANDOM_STRING}"
ETHERPAD_TITLE="${ETHERPAD_TITLE:-Etherpad}"

# Wait for database
echo "Waiting MySQL/MariaDB to be available on port 3306..."

while ! nc -z "${ETHERPAD_DB_HOST}" "${ETHERPAD_DB_PORT}" ; do
  sleep 1 # wait for 1/10 of the second before check again
done

echo "Service MySQL/MariaDB seems ready"
sleep 1

# Check if database already exists
RESULT="$(mysql \
	"-u${ETHERPAD_DB_USERNAME}" \
	"-p${ETHERPAD_DB_PASSWORD}" \
	"-P${ETHERPAD_DB_PORT}" \
	"-h${ETHERPAD_DB_HOST}" \
	--skip-column-names \
	-e "SHOW DATABASES LIKE '${ETHERPAD_DB_NAME}'")"

if [ "$RESULT" != "$ETHERPAD_DB_NAME" ]; then
	# mysql database does not exist, create it
	echo "Creating database ${ETHERPAD_DB_NAME}"

	mysql "-u${ETHERPAD_DB_USERNAME}" \
		"-p${ETHERPAD_DB_PASSWORD}" \
		"-P${ETHERPAD_DB_PORT}" \
		"-h${ETHERPAD_DB_HOST}" \
	    -e "create database ${ETHERPAD_DB_NAME}"
fi

if ! [ -f settings.json ]; then
	echo "Creating database configuration"
	cat <<- EOF > settings.json
	{
	  "title": "${ETHERPAD_TITLE}",
	  "ip": "0.0.0.0",
	  "port" :${ETHERPAD_PORT},
	  "skinName": "colibris",
	  "sessionKey" : "${ETHERPAD_SESSION_KEY}",
	  "trustProxy" : false,
	  "minify" : true,
	  "defaultPadText" : "Welcome to Etherpad!\n\nThis pad text is synchronized as you type, so that everyone viewing this page sees the same text. This allows you to collaborate seamlessly on documents!\n\nIMPORTANT: this pad will be deleted after 30 days. Please don't consider it as document storage."
	  "dbType" : "mysql",
	  "dbSettings" : {
			    "user"    : "${ETHERPAD_DB_USERNAME}",
			    "host"    : "${ETHERPAD_DB_HOST}",
			    "password": "${ETHERPAD_DB_PASSWORD}",
			    "database": "${ETHERPAD_DB_NAME}",
				"charset":  "utf8mb4"
			  },
	EOF

	if [ -n "$ETHERPAD_ADMIN_PASSWORD" ]; then
		ETHERPAD_ADMIN_USER="${ETHERPAD_ADMIN_USER:-admin}"
		echo "Creating admin user configuration for $ETHERPAD_ADMIN_USER/$ETHERPAD_ADMIN_PASSWORD"

		cat <<- EOF >> settings.json
		  "users": {
		    "${ETHERPAD_ADMIN_USER}": {
		      "password": "${ETHERPAD_ADMIN_PASSWORD}",
		      "is_admin": true
		    }
		  },
		EOF
	fi

	cat <<- EOF >> settings.json
	}
	EOF
fi

if ! grep -q '/* GLENUX BEGIN */' src/static/css/pad.css ; then
	cat >> src/static/css/pad.css <<-MARK
	/* GLENUX BEGIN */
	body#innerdocbody {
  		font-size: 16px;
  		line-height: 20px
	}
	MARK
fi

exec "$@"