#!/bin/bash

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

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=1

ynh_systemd_action --service_name="$app" --action="stop" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name="$app-promtail" --action="stop" --log_path="/var/log/$app/promtail.log"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Upgrading source files..." --weight=1

# Download, check integrity, uncompress and patch the source from app.src
ynh_setup_source --dest_dir="$install_dir" --source_id="loki" --full_replace=1
ynh_setup_source --dest_dir="$install_dir" --source_id="promtail"

# Rename the binaries to remove arch
mv "$install_dir"/loki-linux-* "$install_dir"/loki
mv "$install_dir"/promtail-linux-* "$install_dir"/promtail

chmod 750 "$install_dir"
chmod -R o-rwx "$install_dir"
chown -R "$app:www-data" "$install_dir"

mkdir -p "/etc/$app/loki.d" "/etc/$app/promtail.d"
chmod 700 "/etc/$app"
chown -R "$app:www-data" "/etc/$app"

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=1

ynh_add_config --template="loki-default.yaml" --destination="/etc/$app/loki-default.yaml"

# FIXME: this should be handled by the core in the future
# You may need to use chmod 600 instead of 400,
# for example if the app is expected to be able to modify its own config
chmod 400 "/etc/$app/loki-default.yaml"
chown "$app:www-data" "/etc/$app/loki-default.yaml"

ynh_add_config --template="promtail-default.yaml" --destination="/etc/$app/promtail-default.yaml"

# FIXME: this should be handled by the core in the future
# You may need to use chmod 600 instead of 400,
# for example if the app is expected to be able to modify its own config
chmod 400 "/etc/$app/promtail-default.yaml"
chown "$app:www-data" "/etc/$app/promtail-default.yaml"

#=================================================
# REAPPLY SYSTEM CONFIGURATIONS
#=================================================
ynh_script_progression --message="Upgrading system configurations related to $app..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config --template="loki.service"
ynh_add_systemd_config --template="promtail.service" --service="$app-promtail"
yunohost service add "$app" --description="Loki daemon" --log="/var/log/$app/loki.log"
yunohost service add "$app-promtail" --description="Promtail daemon" --log="/var/log/$app/promtail.log"

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append

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

ynh_systemd_action --service_name="$app" --action="start" --log_path="/var/log/$app/loki.log" --line_match="Loki started"
ynh_systemd_action --service_name="$app-promtail" --action="start" --log_path="/var/log/$app/promtail.log" --line_match="server listening on addresses"

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

ynh_script_progression --message="Upgrade of $app completed" --last