#!/bin/bash

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

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

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

# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================

app=$YNH_APP_INSTANCE_NAME
arch=$YNH_ARCH

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..." --weight=1

final_path=/opt/yunohost/$app
test ! -e "$final_path" || ynh_die --message="This path already contains a folder"

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_script_progression --message="Finding available ports..." --weight=1

http_port=$(ynh_find_port --port=3100)
ynh_app_setting_set --app=$app --key=http_port --value=$http_port

grpc_port=$(ynh_find_port --port=9096)
ynh_app_setting_set --app=$app --key=grpc_port --value=$grpc_port

promtail_port=$(ynh_find_port --port=9080)
ynh_app_setting_set --app=$app --key=promtail_port --value=$promtail_port

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=1

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..." --weight=1

# Create a system user
ynh_system_user_create --username=$app --home_dir="$final_path"

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

ynh_app_setting_set --app=$app --key=final_path --value=$final_path
ynh_setup_source --dest_dir="$final_path" --source_id="loki-$YNH_ARCH"
ynh_setup_source --dest_dir="$final_path" --source_id="promtail-$YNH_ARCH"

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

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

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

#=================================================
# ADD A CONFIGURATION
#=================================================
ynh_script_progression --message="Adding 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"

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..." --weight=1

ynh_add_systemd_config --template="loki.service"
ynh_add_systemd_config --template="promtail.service" --service="$app-promtail"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Configuring log rotation..." --weight=1

# Use logrotate to manage application logfile(s)
ynh_use_logrotate

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1

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"

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

# Start a systemd service
ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/loki.log"
ynh_systemd_action --service_name=$app-promtail --action="start" --log_path="/var/log/$app/promtail.log"

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

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