#!/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

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

# Needed for helper "ynh_add_nginx_config"
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
port=$(ynh_app_setting_get --app=$app --key=port)
port_hub=$(ynh_app_setting_get --app=$app --key=port_hub)
port_http_proxy=$(ynh_app_setting_get --app=$app --key=port_http_proxy)
admin=$(ynh_app_setting_get --app=$app --key=admin)

#=================================================
# 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
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." 

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

#=================================================
# MODIFY URL IN NGINX CONF
#=================================================
ynh_script_progression --message="Updating NGINX web server configuration..." 

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"
	# Create a dedicated NGINX config
	ynh_add_nginx_config
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

#=================================================
# SPECIFIC MODIFICATIONS
#=================================================
# CONFIGURE JUPYTERLAB
#=================================================

ynh_backup_if_checksum_is_different --file="$final_path/config/jupyterhub_config.py"

domain=$new_domain
path_url=$new_path

cp -f ../conf/jupyterhub_config.py $final_path/config/jupyterhub_config.py
ynh_replace_string --match_string="__URL__" --replace_string="https://$domain" --target_file="$final_path/config/jupyterhub_config.py"
ynh_replace_string --match_string="__PATH__" --replace_string="${path_url%/}" --target_file="$final_path/config/jupyterhub_config.py"
ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/config/jupyterhub_config.py"
ynh_replace_string --match_string="__PORT_HUB__" --replace_string="$port_hub" --target_file="$final_path/config/jupyterhub_config.py"
ynh_replace_string --match_string="__PORT_HTTP_PROXY__" --replace_string="$port_http_proxy" --target_file="$final_path/config/jupyterhub_config.py"
ynh_replace_string --match_string="__FINAL_PATH__" --replace_string="$final_path" --target_file="$final_path/config/jupyterhub_config.py"
ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$final_path/config/jupyterhub_config.py"

ynh_store_file_checksum --file="$final_path/config/jupyterhub_config.py"

#=================================================
# GENERIC FINALISATION
#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." 

ynh_systemd_action --service_name=$app --action="start" --line_match="JupyterHub is now running at" --log_path="systemd"

#=================================================
# 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="Change of URL completed for $app" --last