#!/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)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
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)

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

### This helper will compare the version of the currently installed app and the version of the upstream package.
### $upgrade_type can have 2 different values
### - UPGRADE_APP if the upstream app version has changed
### - UPGRADE_PACKAGE if only the YunoHost package has changed
### ynh_check_app_version_changed will stop the upgrade if the app is up to date.
### UPGRADE_APP should be used to upgrade the core app only if there's an upgrade to do.
upgrade_type=$(ynh_check_app_version_changed)

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


# Fix is_public as a boolean value
if [ "$is_public" = "Yes" ]; then
	ynh_app_setting_set --app=$app --key=is_public --value=1
	is_public=1
elif [ "$is_public" = "No" ]; then
	ynh_app_setting_set --app=$app --key=is_public --value=0
	is_public=0
#Previous domoticz version did not have public/private settings 
elif [ -z "$is_public" ]; then
	ynh_app_setting_set --app=$app --key=is_public --value=1
	is_public=1
ynh_print_warn --message="Application was set as public in the previous version,meaning it's available without authentication."
	ynh_print_warn --message="if you require to set it as private, please use the authorization config panel in Users/Manage Groups and permissions"
fi

#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 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


#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=10

#ugly hack so that existing backup for previous version work
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 () {
	# 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"

#=================================================
# 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
	cp ../conf/app.src.default ../conf/app.src
	ynh_replace_string --match_string="__OS__" --replace_string="$OS" --target_file="../conf/app.src"
	ynh_replace_string --match_string="__MACH__" --replace_string="$MACH" --target_file="../conf/app.src"
	ynh_replace_string --match_string="__SHA256_SUM__" --replace_string="$SHA256" --target_file="../conf/app.src"
	ynh_setup_source --dest_dir="$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

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

# Create a dedicated nginx config
ynh_add_nginx_config "api_path"

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

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# 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

#allow app user to restart service on startup
cp ../conf/sudoer ../conf/$app.conf
ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file="../conf/$app.conf"
mv ../conf/$app.conf /etc/sudoers.d/$app
chmod 440 /etc/sudoers.d/$app

#=================================================
# SPECIFIC UPGRADE
#=================================================
# ...
#=================================================

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


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

# Create a dedicated systemd config
ynh_add_systemd_config --others_var="port"

#=================================================
# MODIFY A CONFIG FILE
#=================================================

### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.
#ynh_backup_if_checksum_is_different --file="$final_path/CONFIG_FILE"

#ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$final_path/CONFIG_FILE"

# Recalculate and store the checksum of the file for the next upgrade.
#ynh_store_file_checksum --file="$final_path/CONFIG_FILE"

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

# Set permissions to app files
#chown -R root: $final_path
#Both folder and database file must be own by app user for domoticz to work and allow internal upgrade
chown -R $app: $final_path

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..." --weight=1

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

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

yunohost service add $app --description "Domotique open sources" --log "/var/log/$app/$app.log"

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

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

#=================================================
# UPGRADE FAIL2BAN
#=================================================
#ynh_script_progression --message="Reconfiguring fail2ban..." --time --weight=1

# Create a dedicated fail2ban config
#ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failregex="Regex to match into the log for a failed login"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Upgrading SSOwat configuration..." --weight=1

# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# unprotected_uris allows SSO credentials to be passed anyway
	ynh_permission_update --permission "main" --add visitors
fi

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading nginx web server..." --weight=1

ynh_systemd_action --service_name=nginx --action=reload




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



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