#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

# Keep this path for calling _common.sh inside the execution's context of backup and restore scripts
source ../settings/scripts/_common.sh
source /usr/share/yunohost/helpers

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

ynh_clean_setup () {
	ynh_clean_check_starting
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=1

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name

#=================================================
# CHECK IF THE APP CAN BE RESTORED
#=================================================
ynh_script_progression --message="Validating restoration parameters..." --weight=1

test ! -d "/etc/influxdb" \
	|| ynh_die --message="InfluxDB / Grafana are already installed"

#=================================================
# STANDARD RESTORATION STEPS
#=================================================
# RESTORE THE NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Restoring the NGINX web server configuration..."

ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"

#=================================================
# SPECIFIC RESTORATION
#=================================================
# REINSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Reinstalling dependencies..." --weight=24

# Define and install dependencies
ynh_install_app_dependencies $pkg_dependencies
ynh_install_extra_app_dependencies --repo="deb https://packages.grafana.com/oss/deb stable main" --package="grafana" --key="https://packages.grafana.com/gpg.key"

#=================================================
# RESTORE THE MYSQL DATABASE
#=================================================
ynh_script_progression --message="Restoring the MySQL database..." --weight=2

db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
ynh_mysql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql

#=================================================
# RESTORE VARIOUS FILES
#=================================================
ynh_script_progression --message="Restoring various files..." --weight=2

ynh_restore_file --origin_path="/etc/influxdb"
ynh_restore_file --origin_path="/etc/grafana"
ynh_restore_file --origin_path="/var/lib/grafana/plugins" --not_mandatory

# Set permission with the new grafana user (id could have been changed)
chown -R root:grafana "/etc/grafana"
if [ -d "/var/lib/grafana/plugins" ]; then
	chown -R grafana:grafana "/var/lib/grafana/plugins"
fi

#=================================================
# RESTORE THE INFLUXDB DATABASE
#=================================================

ynh_script_progression --message="Restoring the InfluxDB database..." --weight=10
# Restore InfluxDB data (only if backup not empty)
# That happens when passing automated tests (NetData not present)
ynh_systemd_action --service_name=influxdb --action="stop"
if [ "$(ls -A ./influxdb_data)" ] ; then
  influxd restore -metadir /var/lib/influxdb/meta ./influxdb_data
	if [ "$(ls -A ./influxdb_data/opentsdb*)" ] ; then
  	influxd restore -database opentsdb -datadir /var/lib/influxdb/data ./influxdb_data
	fi
fi

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..."

yunohost service add influxdb --description="open source time series database" --log="/var/log/grafana/grafana.log"
yunohost service add grafana-server --description="open source analytics and monitoring solution" --log="/var/log/grafana/grafana.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1

# Enable the systemd service so that InfluxDB and Grafana start at boot
systemctl enable influxdb.service --quiet
systemctl enable grafana-server.service --quiet

systemctl daemon-reload
ynh_systemd_action --service_name=influxdb --action="start"
ynh_systemd_action --service_name=grafana-server --action="start" --log_path="/var/log/grafana/grafana.log" --line_match="HTTP Server Listen" --timeout=600

#=================================================
# GENERIC FINALIZATION
#=================================================
# RELOAD NGINX AND PHP-FPM
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=1

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Restoration completed for $app" --last