#!/bin/bash

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

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

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# CHECK IF THE APP CAN BE INSTALLED
#=================================================

# Testing if ZeroTier is installed
yunohost app list | grep -q "id: zerotier" || ynh_die "ZeroTier is needed, but it is not installed. There is a package for that!"

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
#ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

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

ynh_systemd_action --service_name=$app --action="stop" --log_path="systemd"

#=================================================
# "REBUILD" THE APP (DEPLOY NEW SOURCES, RERUN NPM BUILD...)
#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	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"

	ynh_use_nodejs
	$nodejs_path/corepack enable
	$nodejs_path/corepack prepare yarn@stable --activate

	# Prevent ERR_OSSL_EVP_UNSUPPORTED error
	export NODE_OPTIONS=--openssl-legacy-provider

	ynh_script_progression --message="Building the backend..." --weight=3
	pushd $install_dir/backend
		$nodejs_path/yarn install
	popd

	ynh_script_progression --message="Building the frontend..." --weight=3
        pushd $install_dir/frontend
		$nodejs_path/yarn install
		$nodejs_path/yarn build
	popd
fi

chown -R $app:$app "$install_dir"
chown $app:www-data "$install_dir"
chown $app:www-data "$install_dir/frontend"
chown -R $app:www-data "$install_dir/frontend/public"

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

ynh_add_nginx_config

ynh_add_systemd_config

yunohost service add $app --description="ZeroTier Controller Web UI"

#=================================================
# RECONFIGURE THE APP (UPDATE CONF, APPLY MIGRATIONS...)
#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=1

# Let's retrieve information on the ZeroTier installation
zt_token="$(</var/lib/zerotier-one/authtoken.secret)"
zt_addr="localhost:$(</var/lib/zerotier-one/zerotier-one.port)"

ynh_add_config --template="env" --destination="$install_dir/.env"

chmod 400 "$install_dir/.env"
chown $app:$app "$install_dir/.env"

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

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd"

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

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