#!/bin/bash

# The credentials of the database. Can be public since they will only be used in
# the local development environment
DBUSER="event_gestion"
DBNAME="event_gestion"
DBPASSWD="4KZt3nGPLVeWSvtBZPsd9jdssdJMds78"

# Not critical either
REDIS_PASSWD="dummy"

# It is used in quite a few places
SETTINGS="evenementiel.settings.dev"

# Fills a "templated file" with the information specified in the variables above
# e.g. every occurrence of {{DBUSER}} in the file will be replaced by the value
# of the variable $DBUSER
function fill_template {
  sed "s/{{DBUSER}}/$DBUSER/" -i $1
  sed "s/{{DBNAME}}/$DBNAME/" -i $1
  sed "s/{{DBPASSWD}}/$DBPASSWD/" -i $1
  sed "s/{{REDIS_PASSWD}}/$REDIS_PASSWD/" -i $1
  sed "s/{{SETTINGS}}/$SETTINGS/" -i $1
}

# ---
# Installs the dependencies
# ---

# System packages
apt-get update && apt-get upgrade -y
apt-get install -y python3-pip python3-dev python3-venv libpq-dev postgresql \
                   postgresql-contrib libjpeg-dev nginx redis-server

# Python packages, in a virtual environment
sudo -H -u vagrant python3 -m venv ~vagrant/venv
sudo -H -u vagrant ~vagrant/venv/bin/pip install -U pip wheel
sudo -H -u vagrant ~vagrant/venv/bin/pip install -U -r /vagrant/requirements-devel.txt


# ---
# Setup the production-like environment
# ---

# Database and User
sudo -u postgres createdb $DBNAME
sudo -u postgres createuser -SDR $DBUSER
sudo -u postgres psql -c "ALTER USER $DBUSER WITH PASSWORD '$DBPASSWD';"
sudo -u postgres psql -c "ALTER USER $DBUSER CREATEDB;"
sudo -u postgres psql -c "GRANT ALL PRIVILEGES ON DATABASE $DBNAME TO $DBUSER;"

# The working directory for Daphne and cie
mkdir -p /srv/GE/{media,static}
chown -R vagrant:vagrant /srv/GE

# Nginx
cp /vagrant/provisioning/nginx.conf /etc/nginx/sites-available/ge.conf
if [ ! -h /etc/nginx/sites-enabled/ge.conf ]
then
  # If the configuration file is not activated yet, activates it
  ln -s /etc/nginx/sites-available/ge.conf /etc/nginx/sites-enabled/ge.conf
fi
rm -f /etc/nginx/sites-enabled/default # We do not need this
service nginx restart

# Daphne and the worker(s)
for service in {daphne,worker}.service
do
  cp /vagrant/provisioning/$service /etc/systemd/system/$service
  fill_template /etc/systemd/system/$service
  systemctl enable $service
  systemctl start $service
done

# Redis
redis-cli CONFIG SET requirepass $REDIS_PASSWD
if [ ! $? ]
then
  # In case the requirepass command failed, checks that it was because the
  # password was already set *to the right value*.
  redis-cli AUTH $REDIS_PASSWD
fi
redis-cli -a $REDIS_PASSWD CONFIG REWRITE


# ---
# Prepare Django
# ---

cd /vagrant

# Setup the secrets
sudo -H -u vagrant cp evenementiel/settings/secret_example.py \
	              evenementiel/settings/secret.py
fill_template evenementiel/settings/secret.py

# Run the usual django admin commands
function venv_python {
  sudo -H -u vagrant DJANGO_SETTINGS_MODULE=$SETTINGS \
                     ~vagrant/venv/bin/python \
                     $@
}

venv_python manage.py collectstatic --noinput
venv_python manage.py migrate


# ---
# Setup a friendly environment for the user
# ---

cat > ~vagrant/.bash_profile <<EOF
# Use the .bashrc file provided by Debian
source .bashrc

# Use the development settings
export DJANGO_SETTINGS_MODULE="$SETTINGS"

# Move to the code's folder
cd /vagrant

# Activate the virtualenv
source ~vagrant/venv/bin/activate
EOF
chown vagrant: ~vagrant/.bashrc