#!/bin/bash

version_gt() { 
	test "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1";
}

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

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

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

app="$YNH_APP_INSTANCE_NAME"

domain=$(ynh_app_setting_get --app="$app" --key=domain)
path_url=$(ynh_app_setting_get --app="$app" --key=path)
final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
port=$(ynh_app_setting_get --app="$app" --key=port)
current_OS=$(ynh_app_setting_get --app="$app" --key=OS)
current_mach=$(ynh_app_setting_get --app="$app" --key=mach)
api_path=$(ynh_app_setting_get --app="$app" --key=api_path)
mqtt_domain=$(ynh_app_setting_get --app="$app" --key=mqtt_domain)
mqtt_port=$(ynh_app_setting_get --app="$app" --key=mqtt_port)
mqtt_websocket_port=$(ynh_app_setting_get --app="$app" --key=mqtt_websocket_port)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..."

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..."

# Ugly hack so that previous version backup script from "https://github.com/anubister/domoticz_ynh" works : 
# It creates a dummy file in /etc/cron.d so that the backup do not fail.
current_upstream_version=$(ynh_app_upstream_version --manifest="/etc/yunohost/apps/$app/manifest.json")
current_package_version=$(ynh_app_package_version --manifest="/etc/yunohost/apps/$app/manifest.json")
if version_gt "4.9701" "$current_upstream_version" && version_gt "2" "$current_package_version" ; then
	touch /etc/cron.d/"$app"
fi

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	ynh_clean_check_starting
	# Restore it if the upgrade fails
	ynh_restore_upgradebackup
}

#remove ugly hack
if [ -f /etc/cron.d/"$app" ]; then
	rm /etc/cron.d/"$app"
fi

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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=2

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

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

#Store OS and machine (to be used in restore script)
if [ -z "$current_OS" ]; then
	ynh_app_setting_set --app="$app" --key=OS --value="$OS"
fi
if [ -z "$current_mach" ]; then
	ynh_app_setting_set --app="$app" --key=mach --value="$MACH"
fi

# If final_path doesn't exist, create it
if [ -z "$final_path" ]; then
	final_path=/var/www/"$app"
	ynh_app_setting_set --app="$app" --key=final_path --value="$final_path"
fi

#Create a dedicated path for the api access
if [ -z "$api_path" ]; then
	if [ "$path_url" == "/" ]; then
		api_path=/api_/"$app"
	else
		api_path=/api_"$path_url"
	fi
	ynh_app_setting_set --app="$app" --key=api_path --value="$api_path"
fi

#Create a dedicated path for the mqtt access
if [ -z "$mqtt_domain" ]; then
	ynh_print_info --message="Mosquitto, a mqtt server, can now be installed during upgrade, pleaser refer to package documentation to activate it"
fi

#Port to listen for MQTT internal
if [[ -z "$mqtt_port" && ! -z "$mqtt_domain" ]]; then
	mqtt_port=$(ynh_find_port --port="$default_mqtt_port")
	ynh_app_setting_set --app="$app" --key=mqtt_port --value="$mqtt_port"
fi

#Port to listen for MQTT websocket
if [[ -z "$mqtt_websocket_port" && ! -z "$mqtt_domain" ]]; then
	mqtt_websocket_port=$(ynh_find_port --port="$default_mqtt_websocket_port")
	ynh_app_setting_set --app="$app" --key=mqtt_websocket_port --value="$mqtt_websocket_port"
fi


# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

	ynh_app_setting_delete --app="$app" --key=is_public
fi

# Create the permission "domoticz_API" only if it doesn't exist.
if ! ynh_permission_exists --permission="domoticz_API"
then
	# API Authorization with dedicated URL
	ynh_permission_create --permission="domoticz_API" --url="$domain$api_path" --allowed="visitors"
fi

# Create the permission "domoticz_MQTT" only if it doesn't exist.
if [ ! -z "$mqtt_domain" ]; then
	if ! ynh_permission_exists --permission="domoticz_MQTT"
	then
		# API Authorization with dedicated URL
		ynh_permission_create --permission="domoticz_MQTT" --url="$mqtt_domain" --allowed="visitors"
	fi
fi


#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..."

# Create a dedicated user (if not existing)
ynh_system_user_create --username="$app" --home_dir="$final_path"

#allow user to access USB / serial port to communicate with tools (RFXtrx, Z-wave dongle, etc.) & i2c bus
if grep dialout -q < /etc/group; then
	usermod -a -G dialout "$app"
fi
if grep i2c -q < /etc/group; then
	usermod -a -G i2c "$app"
fi
if grep gpio -q < /etc/group; then
	usermod -a -G gpio "$app"
fi

#allow app user to restart service on startup
ynh_add_config --template="../conf/sudoer" --destination="/etc/sudoers.d/$app"
chmod 440 /etc/sudoers.d/"$app"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=15

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_add_config --template="../conf/app.src.default" --destination="../conf/app.src"
	ynh_setup_source --dest_dir="$final_path"
	#Create the database file
	if [ ! -f "$final_path"/domoticz.db ]; then
		touch "$final_path"/domoticz.db
		chmod 644 "$final_path"/domoticz.db
	fi
fi

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

#=================================================
# SET MOSQUITTO SETTINGS
#=================================================
if [ ! -z "$mqtt_domain" ]; then
	ynh_script_progression --message="Setting up mosquitto..." --weight=5

	#Installing packages
	ynh_install_extra_app_dependencies --repo="deb https://repo.mosquitto.org/debian buster main" --package="$extra_pkg_dependencies" --key="http://repo.mosquitto.org/debian/mosquitto-repo.gpg.key"

	#Setting up conf file for access
	if [ ! -f "/etc/mosquitto/conf.d/"$app"_mosquitto.conf" ]
	then
		ynh_add_config --template="../conf/domoticz_mosquitto.conf" --destination="/etc/mosquitto/conf.d/"$app"_mosquitto.conf"
		chmod 644 /etc/mosquitto/conf.d/"$app"_mosquitto.conf

		#Setting up user&pwd for mqtt access
		ynh_app_setting_set --app="$app" --key=mqtt_user --value=$(ynh_string_random --length=8)
		ynh_app_setting_set --app="$app" --key=mqtt_pwd --value=$(ynh_string_random)
		echo $(ynh_app_setting_get --app="$app" --key=mqtt_user):$(ynh_app_setting_get --app="$app" --key=mqtt_pwd) > "/etc/mosquitto/conf.d/"$app"_credentials"
		mosquitto_passwd -U "/etc/mosquitto/conf.d/"$app"_credentials"

		ynh_print_info --message="The credential to the mosquitto server has been saved in the settings of the app"
	fi
fi

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

[[ ! -z "$mqtt_domain" ]] && ynh_add_config --template="../conf/mqtt_nginx.conf" --destination="/etc/nginx/conf.d/"$mqtt_domain".d/mqtt_"$app".conf"


# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=5

ynh_install_app_dependencies "$pkg_dependencies"

#=================================================
# SPECIFIC UPGRADE
#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..."

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..."

mkdir -p /var/log/"$app"
chown -R domoticz: /var/log/"$app"

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append
[[ ! -z "$mqtt_domain" ]] && ynh_use_logrotate --logfile="/var/log/mosquitto/" --non-append


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

yunohost service add "$app" --description="Domotique open sources" --log="/var/log/$app/$app.log"
[[ ! -z "$mqtt_domain" ]] && yunohost service add mosquitto --description="Serveur MQTT pour domoticz" --log="/var/log/mosquitto/mosquitto.log"


#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=3

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

#Restarting mosquitto to take changes from /etc/mosquitto/conf.d/*.conf into account
[[ ! -z "$mqtt_domain" ]] && ynh_systemd_action --service_name=mosquitto --action="restart"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..."

ynh_systemd_action --service_name=nginx --action=reload

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

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