#!/bin/bash

# Exit on command errors and treat unset variables as an error
set -eu

# This is a multi-instance app, meaning it can be installed several times independently
# The id of the app as stated in the manifest is available as $YNH_APP_ID
# The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2", ...)
# The app instance name is available as $YNH_APP_INSTANCE_NAME
#    - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
#    - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
#    - ynhexample__{N} for the subsequent installations, with N=3,4, ...
# The app instance name is probably what you are interested the most, since this is
# guaranteed to be unique. This is a good unique identifier to define installation path,
# db names, ...
app=$YNH_APP_INSTANCE_NAME

# Retrieve arguments
domain=$YNH_APP_ARG_DOMAIN
path=$YNH_APP_ARG_PATH
admin=$YNH_APP_ARG_ADMIN
is_public=$YNH_APP_ARG_IS_PUBLIC
final_path=/var/www/$app

# Source YunoHost helpers
source /usr/share/yunohost/helpers

# Save app settings
ynh_app_setting_set "$app" admin "$admin"
ynh_app_setting_set "$app" is_public "$is_public"

# Check domain/path availability
sudo yunohost app checkurl "${domain}${path}" -a "$app" \
    || ynh_die "Path not available: ${domain}${path}"

tmp=/tmp/flaruminstall
sudo rm -rf $tmp
sudo mkdir -p $tmp
sudo chown -R www-data:www-data $tmp
sudo chmod -R 755 $tmp

### composer ###
if ! type "composer" > /dev/null; then
  # Install composer (https://getcomposer.org)
  EXPECTED_SIGNATURE=$(wget https://composer.github.io/installer.sig -O - -q)
  sudo su - www-data -s /bin/bash -c "php -r \"copy('https://getcomposer.org/installer', '$tmp/composer-setup.php');\""
  ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', '$tmp/composer-setup.php');")
  if [ "$EXPECTED_SIGNATURE" = "$ACTUAL_SIGNATURE" ]
  then
      sudo mkdir /var/www/.composer
      sudo chown -R www-data:www-data /var/www/.composer
      sudo chmod -R 755 /var/www/.composer
      sudo su - www-data -s /bin/bash -c "php $tmp/composer-setup.php --install-dir=$tmp --filename=composer"
      sudo mv $tmp/composer /usr/local/bin
      sudo chown root:root /usr/local/bin/composer
      RESULT=$?
  else
      >&2 echo 'ERROR: Invalid installer signature'
      RESULT=1
  fi
  if [ $RESULT != 0 ]
  then
    sudo rm -rf $final_path
    exit $RESULT
  fi
fi
  sudo mkdir -p /var/www/.composer
  sudo chown -R www-data:www-data /var/www/.composer
  sudo chmod -R 755 /var/www/.composer
### composer end ###

### Install flarum
cwd=$(pwd)
sudo su - www-data -s /bin/bash -c "mkdir -p $tmp/$app && cd $tmp/$app && php -d memory_limit=-1 /usr/local/bin/composer create-project flarum/flarum . --stability=beta"
sudo mkdir $final_path
sudo mv $tmp/$app $final_path/..
sudo chown -R www-data:www-data $final_path
cd $cwd
sudo rm -rf $tmp

### MySQL ###
dbuser=$app
dbname=$app
dbpass=$(ynh_string_random 15)
ynh_app_setting_set "$app" mysqlpwd "$dbpass"
ynh_mysql_create_db "$dbname" "$dbuser" "$dbpass"

### Nginx ###
if [ $path = "/" ]; then
nginx_conf=../conf/nginx_root.conf
else
nginx_conf=../conf/nginx.conf
fi
sed -i "s@YNH_WWW_PATH@$path@g" $nginx_conf
sed -i "s@YNH_WWW_ALIAS@$app/@g" $nginx_conf
sed -i "s@YNH_WWW_APP@$app@g" $nginx_conf
sudo cp $nginx_conf /etc/nginx/conf.d/$domain.d/$app.conf

### PHP ###
sed -i "s@YNH_WWW_APP@$app@g" ../conf/php-fpm.conf
sed -i "s@YNH_WWW_ALIAS@$app/@g" ../conf/php-fpm.conf
finalphpconf=/etc/php5/fpm/pool.d/$app.conf
sudo cp ../conf/php-fpm.conf $finalphpconf
sudo chown root: $finalphpconf
sudo chmod 644 $finalphpconf
sudo service php5-fpm reload

# If app is public, add url to SSOWat conf as skipped_uris
if [[ $is_public -eq 1 ]]; then
  # unprotected_uris allows SSO credentials to be passed anyway.
  ynh_app_setting_set "$app" unprotected_uris "/"
fi

# Reload services
sudo service nginx reload

# Tell user the MySQL credentials for post-installation
echo "MySQL database user is " $dbuser
echo "MySQL database password is " $dbpass