#!/bin/bash

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

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

#=================================================
# CHECK VERSION
#=================================================

upgrade_type=$(ynh_check_app_version_changed)

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

# Drop sudoers file if present
if [ -f "/etc/sudoers.d/${app}_ynh" ]; then
	ynh_secure_remove /etc/sudoers.d/${app}_ynh
fi

# Remove deprecated services
if systemctl list-units --full -all | grep -Fq "wireguard_ui_conf.path"; then
	systemctl disable --now --quiet wireguard_ui_conf.path
	ynh_secure_remove --file="/etc/systemd/system/wireguard_ui_conf.path"
fi
if systemctl list-units --full -all | grep -Fq "wireguard_ui_conf.service"; then
	systemctl disable --now --quiet wireguard_ui_conf.service
	ynh_secure_remove --file="/etc/systemd/system/wireguard_ui_conf.service"
fi

# Remove the service integration from an older version
if ynh_exec_warn_less yunohost service status wireguard@wg0 >/dev/null
then
	yunohost service remove wireguard@wg0
fi

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

ynh_systemd_action --service_name=wireguard_ui --action="stop" --line_match="Stopped WireGuard UI" --log_path="systemd" --timeout=30
ynh_systemd_action --service_name=wg-quick@wg0 --action="stop"

#=================================================
# 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" 
fi

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

# Update configuration for the Web UI
ynh_add_config --template="../conf/wireguard-ui.env" --destination="$install_dir/wireguard-ui.env"

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1

# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=1

# Create a dedicated systemd config for the web UI
ynh_add_systemd_config --service=wireguard_ui --template=wireguard_ui.service

# Create dedicated systemd configs for starting and monitoring WireGuard's configuration
cp ../conf/wireguard@.service /etc/systemd/system/wireguard@.service
cp ../conf/wireguard@.path /etc/systemd/system/wireguard@.path
systemctl daemon-reload
systemctl enable --quiet wireguard@wg0.service
systemctl enable --quiet --now wireguard@wg0.path

#=================================================
# ENABLE PORT FORWARDING
#=================================================
ynh_script_progression --message="Enabling port forwarding..." --weight=1

ynh_add_config --template="../conf/sysctl.conf" --destination="/etc/sysctl.d/$app.conf"
sysctl -p /etc/sysctl.d/$app.conf

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

# Set permissions to app files
chmod 750 "$install_dir"
chmod -R o-rwx "$install_dir"
chown -R $app: "$install_dir"

chmod 750 /etc/wireguard
chmod -R o-rwx /etc/wireguard
chown -R $app: /etc/wireguard

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

yunohost service add wg-quick@wg0 --description="WireGuard VPN" --needs_exposed_ports="$port_wg" --test_status="wg show | grep wg0"
yunohost service add wireguard_ui --description="WireGuard UI"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting the systemd service for the UI..." --weight=1

# Start a systemd service
ynh_systemd_action --service_name=wireguard_ui --action="start" --line_match="http server started" --log_path="systemd" --timeout=30

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

ynh_script_progression --message="Upgrade of $app completed. You may need to reboot your server before being able to start the WireGuard service." --last