#!/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

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

admin=$(ynh_app_setting_get --app="$app" --key=admin)
is_public=$(ynh_app_setting_get --app="$app" --key=is_public)
public_path=$(ynh_app_setting_get --app="$app" --key=public_path)
final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
log_path=$(ynh_app_setting_get --app="$app" --key=log_path)

port=$(ynh_app_setting_get --app="$app" --key=port)
db_pwd=$(ynh_app_setting_get --app="$app" --key=psqlpwd)
admin_mail=$(ynh_user_get_info "$admin" mail)
redis_db=$(ynh_app_setting_get --app="$app" --key=redis_db)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before changing its URL (may take a while)..." --weight=40

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

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

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# 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 "public_path" "port"
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
#=================================================
# MODIFY SETTINGS
#=================================================
ynh_script_progression --message="Modify project config file..."

# save old settings file
settings="$final_path/settings.py"
ynh_backup_if_checksum_is_different --file="$settings"

cp "../conf/settings.py" "$settings"

ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file="$settings"
ynh_replace_string --match_string="__DB_PWD__" --replace_string="$db_pwd" --target_file="$settings"
ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$settings"
ynh_replace_string --match_string="__ADMINMAIL__" --replace_string="$admin_mail" --target_file="$settings"
ynh_replace_string --match_string="__FINAL_HOME_PATH__" --replace_string="$final_path" --target_file="$settings"
ynh_replace_string --match_string="__FINAL_WWW_PATH__" --replace_string="$public_path" --target_file="$settings"
ynh_replace_string --match_string="__LOG_FILE__" --replace_string="$log_file" --target_file="$settings"
ynh_replace_string --match_string="__REDIS_DB__" --replace_string="$redis_db" --target_file="$settings"

# Difference to install/upgrade scripts: Use $new_domain and $new_path here:
ynh_replace_string --match_string="__DOMAIN__" --replace_string="$new_domain" --target_file="$settings"
ynh_replace_string --match_string="__PATH_URL__" --replace_string="$new_path" --target_file="$settings"

# Recalculate and store the config file checksum into the app settings
ynh_store_file_checksum --file="$settings"

#=================================================
# GENERIC FINALISATION
#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting systemd services..." --weight=5

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

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