#!/bin/bash

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

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

#=================================================
# RETRIEVE ARGUMENTS
#=================================================

old_domain=$YNH_APP_OLD_DOMAIN
old_path=$YNH_APP_OLD_PATH

new_domain=$YNH_APP_NEW_DOMAIN
new_path=$YNH_APP_NEW_PATH

app=$YNH_APP_INSTANCE_NAME

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before changing its url (may take a while)..." --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..." --weight=1

nginx_conf_path=/etc/nginx/conf.d/$old_domain.d/$app.conf

# Change the path in the nginx config file
if [ $change_path -eq 1 ]
then
  # Make a backup of the original nginx config file if modified
  ynh_backup_if_checksum_is_different --file="$nginx_conf_path"
  # Set global variables for nginx helper
  domain="$old_domain"
  path_url="$new_path"
  # Store path_url setting
  ynh_app_setting_set --app=$app --key=path_url --value="$path_url"
  # Create a dedicated nginx config
  ynh_add_nginx_config
  if [ "$path_url" = "/" ]
  then
    # Replace "//" location (due to nginx template)
    # Prevent from replacing in "http://" expressions by excluding ":" as preceding character
    sed --in-place "s@\([^:]\)//@\1/@g" "$nginx_conf_path"
  else
    # Move prefix comment #for-subdir at end of lines
    sed --in-place "s/#for-subdir\(.*\)/\1 #for-subdir/g" "$nginx_conf_path"
  fi
  ynh_store_file_checksum --file="$nginx_conf_path"
fi

# Change the domain for nginx
if [ $change_domain -eq 1 ]
then
  # Delete file checksum for the old conf file location
  ynh_delete_file_checksum --file="$nginx_conf_path"
  mv $nginx_conf_path /etc/nginx/conf.d/$new_domain.d/$app.conf
  # Store file checksum for the new config file location
  ynh_store_file_checksum --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
fi

#=================================================
# GENERIC FINALISATION
#=================================================
# 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="Change of URL completed for $app"