#!/bin/bash

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

app=$YNH_APP_INSTANCE_NAME

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

# Retrieve old app settings
domain=$(ynh_app_setting_get "$app" domain)
path=$(ynh_app_setting_get "$app" path)

# Fix permissions
sudo chmod a+rx ./conf_grafana/_common.sh
sudo chmod a+r ./conf_grafana/influxdb-grafana-deps.control

# Source local helpers
source ./conf_grafana/_common.sh
SRCPATH=$(pwd)

# Fix path if needed
path=$(fix_path $path)

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

# Install needed dependency for HTTPS apt access
# (that dependency could be handled upstream in YunoHost)
ynh_package_install apt-transport-https

# Install needed apt repository for InfluxDB
curl -sL https://repos.influxdata.com/influxdb.key | sudo apt-key add -
source /etc/os-release
test $VERSION_ID = "8" && echo "deb https://repos.influxdata.com/debian jessie stable" | sudo tee $INFLUXDB_REPOSITORY

# Install needed apt repository for Grafana
machine=$(uname -m)
# Add the repos depending on processor architecture
 if [[ "$machine" =~ "x86" ]]; then 
  # x86 processor --> we use the official repository
  curl -s https://packagecloud.io/install/repositories/grafana/stable/script.deb.sh | sudo bash
elif [[ "$machine" =~ "armv6" ]] ; then
  # For ARM, use fg2it repository
  # https://github.com/fg2it/grafana-on-raspberry
  curl https://bintray.com/user/downloadSubjectPublicKey?username=bintray | sudo apt-key add -
  echo "deb http://dl.bintray.com/fg2it/deb-rpi-1b jessie main" | sudo tee $GRAFANA_REPOSITORY
elif [[ "$machine" =~ "armv7" ]] ; then
  curl https://bintray.com/user/downloadSubjectPublicKey?username=bintray | sudo apt-key add -
  echo "deb http://dl.bintray.com/fg2it/deb jessie main" | sudo tee $GRAFANA_REPOSITORY
fi

# Install packages
# We install them as dependencies as they may already be installed and used for other purposes
ynh_package_install_from_equivs ./conf_grafana/influxdb-grafana-deps.control \
|| ynh_die "Unable to install Debian packages"

# Create and restore Grafana database
dbname=$app
dbuser=$app
dbpass=$(ynh_app_setting_get "$app" mysqlpwd)
ynh_mysql_create_db "$dbname" "$dbuser" "$dbpass"
ynh_mysql_connect_as "$dbuser" "$dbpass" "$dbname" < ./dump.sql

# Restore InfluxDB data (only if backup not empty)
# That happens when passing automated tests (NetData not present)
if [ "$(ls -A $SRCPATH/influxdb_data)" ] ; then
  sudo influxd restore -metadir /var/lib/influxdb/meta $SRCPATH/influxdb_data
  sudo influxd restore -database opentsdb -datadir /var/lib/influxdb/data $SRCPATH/influxdb_data
fi
# Restore configuration files
sudo cp -a $SRCPATH/conf_influxdb/* /etc/influxdb
sudo cp -a $SRCPATH/conf_grafana/* /etc/grafana
[ "$(sudo ls -A $SRCPATH/conf_grafana_plugins)" ] && sudo cp -a $SRCPATH/conf_grafana_plugins/* /var/lib/grafana/plugins

# Start InfluxDB server
sudo systemctl start influxdb

# Restart grafana server
sudo systemctl restart grafana-server

# Restart NetData if present
sudo systemctl restart netdata || true

# Restore NGINX configuration
sudo cp -a $SRCPATH/nginx.conf "/etc/nginx/conf.d/${domain}.d/${app}.conf"

# Restart webserver
sudo service nginx reload