#!/bin/bash

#=================================================
# GENERIC STARTING
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

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

#=================================================
# RETRIEVE ARGUMENTS
#=================================================
app=$YNH_APP_INSTANCE_NAME
old_domain=$YNH_APP_OLD_DOMAIN
new_domain=$YNH_APP_NEW_DOMAIN
old_path=$YNH_APP_OLD_PATH
new_path=$YNH_APP_NEW_PATH

# definie useful vars
old_nginx_conf="/etc/nginx/conf.d/$old_domain.d/$app.conf"
new_nginx_conf="/etc/nginx/conf.d/$new_domain.d/$app.conf"
new_path=$(ynh_normalize_url_path --path_url="$new_path")

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --time --weight=1
# Needed for helper "ynh_add_nginx_config"
final_path=$(ynh_app_setting_get --app=$app --key=final_path)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before changing its url (may take a while)..." --time --weight=1
# backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# remove the new domain config file, the remove script won't do it as it doesn't know yet its location.
	ynh_secure_remove --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# CHECK WHICH PARTS SHOULD BE CHANGED
#=================================================
change_domain=0
if [ "$old_domain" != "$new_domain" ]; then
	change_domain=1
fi
change_path=0
if [ "$old_path" != "$new_path" ]; then
	change_path=1
fi

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# MODIFY URL IN NGINX CONF
#=================================================
ynh_script_progression --message="Updating nginx web server configuration..." --time --weight=1

# Change the path in the nginx config file
if [ $change_path -eq 1 ]; then
	# Make a backup of the original nginx config file if modified
	ynh_backup_if_checksum_is_different --file="$old_nginx_conf"
	# Set global variables for nginx helper
	domain="$old_domain"
	path_url="$new_path"
	# Create a dedicated nginx config
	ynh_add_nginx_config
	if [ "$path_url" != "/" ]; then
		ynh_replace_string --match_string="^#sub_path_only" --replace_string="" --target_file="$old_nginx_conf"
	fi
	# Store file checksum for the new config file location
	ynh_store_file_checksum --file="$old_nginx_conf"
fi

# Change the domain for nginx
if [ $change_domain -eq 1 ]; then
	# Delete file checksum for the old conf file location
	ynh_delete_file_checksum --file="$old_nginx_conf"
	mv "$old_nginx_conf" "$new_nginx_conf"
	# Store file checksum for the new config file location
	ynh_store_file_checksum --file="$new_nginx_conf"
fi

#=================================================
# GENERIC FINALISATION
#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading nginx web server..." --time --weight=1
ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# END OF SCRIPT
#=================================================
ynh_script_progression --message="Change of URL completed for $app" --time --last