#!/bin/bash
set -e

cd /app

# Default to the environment variable values set in .env.example
source /app/.env.example

# is a mysql or postgresql database linked?
# requires that the mysql or postgresql containers have exposed
# port 3306 and 5432 respectively.
if [ -n "${MYSQL_PORT_3306_TCP_ADDR}" ]; then
  HUGINN_DATABASE_ADAPTER=${HUGINN_DATABASE_ADAPTER:-mysql2}
  HUGINN_DATABASE_HOST=${HUGINN_DATABASE_HOST:-${MYSQL_PORT_3306_TCP_ADDR}}
  HUGINN_DATABASE_PORT=${HUGINN_DATABASE_PORT:-${MYSQL_PORT_3306_TCP_PORT}}
elif [ -n "${POSTGRESQL_PORT_5432_TCP_ADDR}" ]; then
  HUGINN_DATABASE_ADAPTER=${HUGINN_DATABASE_ADAPTER:-postgres}
  HUGINN_DATABASE_HOST=${HUGINN_DATABASE_HOST:-${POSTGRESQL_PORT_5432_TCP_ADDR}}
  HUGINN_DATABASE_PORT=${HUGINN_DATABASE_PORT:-${POSTGRESQL_PORT_5432_TCP_PORT}}
fi

grep = /app/.env.example | sed -e 's/^#[^ ]//' | grep -v -e '^#' | cut -d= -f1 | \
  while read var ; do
    eval "echo \"$var=\\\"\${HUGINN_$var:-\$$var}\\\"\""
  done | grep -v -e ^= > /app/.env

chmod ugo+r /app/.env
source /app/.env

DATABASE_HOST=${HUGINN_DATABASE_HOST:-${DATABASE_HOST:-localhost}}
DATABASE_ENCODING=${HUGINN_DATABASE_ENCODING:-${DATABASE_ENCODING}}
USE_GRAPHVIZ_DOT=${HUGINN_USE_GRAPHVIZ_DOT:-${USE_GRAPHVIZ_DOT}}

# use default port number if it is still not set
case "${DATABASE_ADAPTER}" in
  mysql2) DATABASE_PORT=${DATABASE_PORT:-3306} ;;
  postgres) DATABASE_PORT=${DATABASE_PORT:-5432} ;;
  *) echo "Unsupported database adapter. Available adapters are mysql2, and postgres." && exit 1 ;;
esac

# start supervisord
/usr/bin/supervisord -c /etc/supervisor/supervisord.conf

# start mysql server if ${DATABASE_HOST} is localhost
if [ "${DATABASE_HOST}" == "localhost" ]; then
  if [ "${DATABASE_ADAPTER}" == "postgres" ]; then
    echo "DATABASE_ADAPTER 'postgres' is not supported internally. Please provide DATABASE_HOST."
    exit 1
  fi

  # configure supervisord to start mysql (manual)
  cat > /etc/supervisor/conf.d/mysqld.conf <<EOF
[program:mysqld]
priority=20
directory=/tmp
command=/usr/bin/mysqld_safe
user=root
autostart=false
autorestart=true
stdout_logfile=/var/log/supervisor/%(program_name)s.log
stderr_logfile=/var/log/supervisor/%(program_name)s.log
EOF
  supervisorctl reload

  # fix permissions and ownership of /var/lib/mysql
  chown -R mysql:mysql /var/lib/mysql
  chmod 700 /var/lib/mysql

  # initialize MySQL data directory
  if [ ! -d /var/lib/mysql/mysql ]; then
    mysql_install_db --user=mysql
  fi

  echo "Starting mysql server..."
  supervisorctl start mysqld >/dev/null

  # wait for mysql server to start (max 120 seconds)
  timeout=120
  while ! mysqladmin -uroot ${DATABASE_PASSWORD:+-p$DATABASE_PASSWORD} status >/dev/null 2>&1
  do
    timeout=$(expr $timeout - 1)
    if [ $timeout -eq 0 ]; then
      echo "Failed to start mysql server"
      exit 1
    fi
    sleep 1
  done

  if ! echo "USE ${DATABASE_NAME}" | mysql -uroot ${DATABASE_PASSWORD:+-p$DATABASE_PASSWORD} >/dev/null 2>&1; then
    DB_INIT="yes"
    echo "CREATE DATABASE IF NOT EXISTS \`${DATABASE_NAME}\` DEFAULT CHARACTER SET \`utf8\` COLLATE \`utf8_unicode_ci\`;" | mysql -uroot ${DATABASE_PASSWORD:+-p$DATABASE_PASSWORD}
    echo "GRANT SELECT, LOCK TABLES, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER ON \`${DATABASE_NAME}\`.* TO 'root'@'localhost';" | mysql -uroot ${DATABASE_PASSWORD:+-p$DATABASE_PASSWORD}
  fi
fi

# Assuming we have a created database, run the migrations and seed it idempotently.
[ -z "${DO_NOT_MIGRATE}" ] && sudo -u huginn -EH bundle exec rake db:migrate
[ -z "${DO_NOT_SEED}" ] && sudo -u huginn -EH bundle exec rake db:seed

[ -n "$INTENTIONALLY_SLEEP" ] && sleep $INTENTIONALLY_SLEEP

# Fixup the Procfile and prepare the PORT
[ -z "${DO_NOT_RUN_JOBS}" ] && perl -pi -e 's/^jobs:/#jobs:/' /app/Procfile
perl -pi -e 's/rails server$/rails server -p \$PORT/' /app/Procfile
export PORT

# Start huginn
sudo -u huginn -EH bundle exec foreman start

# As the ENTRYPOINT script, when this exits the docker container will Exit.
exit 0