#!/bin/bash
# should be run as root and only on Ubuntu 18/20, Debian Buster versions!
echo "Welcome to the MediacMS installation!";

if [ `id -u` -ne 0 ]
  then echo "Please run as root"
  exit
fi


while true; do
    read -p "
This script will attempt to perform a system update, install required dependencies, install and configure PostgreSQL, NGINX, Redis and a few other utilities.
It is expected to run on a new system **with no running instances of any these services**. Make sure you check the script before you continue. Then enter yes or no
" yn
    case $yn in
        [Yy]* ) echo "OK!"; break;;
        [Nn]* ) echo "Have a great day"; exit;;
        * ) echo "Please answer yes or no.";;
    esac
done


osVersion=$(lsb_release -d)
if [[ $osVersion == *"Ubuntu 20"* ]] || [[ $osVersion == *"Ubuntu 18"* ]] || [[ $osVersion == *"buster"* ]]; then
    echo 'Performing system update and dependency installation, this will take a few minutes'
    apt-get update && apt-get -y upgrade && apt-get install python3-venv python3-dev virtualenv redis-server postgresql nginx git gcc vim unzip imagemagick python3-certbot-nginx certbot wget xz-utils -y
else
    echo "This script is tested for Ubuntu 18 and 20 versions only, if you want to try MediaCMS on another system you have to perform the manual installation"
    exit
fi

# install ffmpeg
echo "Downloading and installing ffmpeg"
wget -q https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz
mkdir -p tmp
tar -xf ffmpeg-release-amd64-static.tar.xz --strip-components 1 -C tmp
cp -v tmp/{ffmpeg,ffprobe,qt-faststart} /usr/local/bin
rm -rf tmp ffmpeg-release-amd64-static.tar.xz
echo "ffmpeg installed to /usr/local/bin"

read -p "Enter portal URL, or press enter for localhost : " FRONTEND_HOST
read -p "Enter portal name, or press enter for 'MediaCMS : " PORTAL_NAME

[ -z "$PORTAL_NAME" ] && PORTAL_NAME='MediaCMS'
[ -z "$FRONTEND_HOST" ] && FRONTEND_HOST='localhost'

echo 'Creating database to be used in MediaCMS'

su -c "psql -c \"CREATE DATABASE mediacms\"" postgres
su -c "psql -c \"CREATE USER mediacms WITH ENCRYPTED PASSWORD 'mediacms'\"" postgres
su -c "psql -c \"GRANT ALL PRIVILEGES ON DATABASE mediacms TO mediacms\"" postgres

echo 'Creating python virtualenv on /home/mediacms.io'

cd /home/mediacms.io
virtualenv . --python=python3
source  /home/mediacms.io/bin/activate
cd mediacms
pip install -r requirements.txt

SECRET_KEY=`python -c 'from django.core.management.utils import get_random_secret_key; print(get_random_secret_key())'`

# remove http or https prefix
FRONTEND_HOST=`echo "$FRONTEND_HOST" | sed -r 's/http:\/\///g'`
FRONTEND_HOST=`echo "$FRONTEND_HOST" | sed -r 's/https:\/\///g'`

sed -i s/localhost/$FRONTEND_HOST/g deploy/local_install/mediacms.io

FRONTEND_HOST_HTTP_PREFIX='http://'$FRONTEND_HOST

echo 'FRONTEND_HOST='\'"$FRONTEND_HOST_HTTP_PREFIX"\' >> cms/local_settings.py
echo 'PORTAL_NAME='\'"$PORTAL_NAME"\' >> cms/local_settings.py
echo "SSL_FRONTEND_HOST = FRONTEND_HOST.replace('http', 'https')" >> cms/local_settings.py

echo 'SECRET_KEY='\'"$SECRET_KEY"\' >> cms/local_settings.py
echo "LOCAL_INSTALL = True" >> cms/local_settings.py

mkdir logs
mkdir pids
python manage.py migrate
python manage.py loaddata fixtures/encoding_profiles.json
python manage.py loaddata fixtures/categories.json
python manage.py collectstatic --noinput

ADMIN_PASS=`python -c "import secrets;chars = 'abcdefghijklmnopqrstuvwxyz0123456789';print(''.join(secrets.choice(chars) for i in range(10)))"`
echo "from users.models import User; User.objects.create_superuser('admin', 'admin@example.com', '$ADMIN_PASS')" | python manage.py shell

echo "from django.contrib.sites.models import Site; Site.objects.update(name='$FRONTEND_HOST', domain='$FRONTEND_HOST')" | python manage.py shell

chown -R www-data. /home/mediacms.io/
cp deploy/local_install/celery_long.service /etc/systemd/system/celery_long.service && systemctl enable celery_long && systemctl start celery_long
cp deploy/local_install/celery_short.service /etc/systemd/system/celery_short.service && systemctl enable celery_short && systemctl start celery_short
cp deploy/local_install/celery_beat.service /etc/systemd/system/celery_beat.service && systemctl enable celery_beat &&systemctl start celery_beat
cp deploy/local_install/mediacms.service /etc/systemd/system/mediacms.service && systemctl enable mediacms.service && systemctl start mediacms.service

mkdir -p /etc/letsencrypt/live/mediacms.io/
mkdir -p /etc/letsencrypt/live/$FRONTEND_HOST
mkdir -p /etc/nginx/sites-enabled
mkdir -p /etc/nginx/sites-available
mkdir -p /etc/nginx/dhparams/
rm -rf /etc/nginx/conf.d/default.conf
rm -rf /etc/nginx/sites-enabled/default
cp deploy/local_install/mediacms.io_fullchain.pem /etc/letsencrypt/live/$FRONTEND_HOST/fullchain.pem
cp deploy/local_install/mediacms.io_privkey.pem /etc/letsencrypt/live/$FRONTEND_HOST/privkey.pem
cp deploy/local_install/dhparams.pem /etc/nginx/dhparams/dhparams.pem
cp deploy/local_install/mediacms.io /etc/nginx/sites-available/mediacms.io
ln -s /etc/nginx/sites-available/mediacms.io /etc/nginx/sites-enabled/mediacms.io
cp deploy/local_install/uwsgi_params /etc/nginx/sites-enabled/uwsgi_params
cp deploy/local_install/nginx.conf /etc/nginx/
systemctl stop nginx
systemctl start nginx

# attempt to get a valid certificate for specified domain

if [ "$FRONTEND_HOST" != "localhost" ]; then
    echo 'attempt to get a valid certificate for specified url $FRONTEND_HOST'
    certbot --nginx -n --agree-tos --register-unsafely-without-email -d $FRONTEND_HOST
    certbot --nginx -n --agree-tos --register-unsafely-without-email -d $FRONTEND_HOST
    # unfortunately for some reason it needs to be run two times in order to create the entries
    # and directory structure!!!
    systemctl restart nginx
else
    echo "will not call certbot utility to update ssl certificate for url 'localhost', using default ssl certificate"
fi

# Generate individual DH params
if [ "$FRONTEND_HOST" != "localhost" ]; then
    # Only generate new DH params when using "real" certificates.
    openssl dhparam -out /etc/nginx/dhparams/dhparams.pem 4096
    systemctl restart nginx
else
    echo "will not generate new DH params for url 'localhost', using default DH params"
fi

# Bento4 utility installation, for HLS

cd /home/mediacms.io/mediacms
wget http://zebulon.bok.net/Bento4/binaries/Bento4-SDK-1-6-0-637.x86_64-unknown-linux.zip
unzip Bento4-SDK-1-6-0-637.x86_64-unknown-linux.zip
mkdir /home/mediacms.io/mediacms/media_files/hls

# last, set default owner
chown -R www-data. /home/mediacms.io/

echo 'MediaCMS installation completed, open browser on http://'"$FRONTEND_HOST"' and login with user admin and password '"$ADMIN_PASS"''