#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source /usr/share/yunohost/helpers

#=================================================
# LOAD SETTINGS
#=================================================

# Retrieve arguments
app=$YNH_APP_INSTANCE_NAME
domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
redirect_type=$(ynh_app_setting_get --app=$app --key=redirect_type)
redirect_path=$(ynh_app_setting_get --app=$app --key=redirect_path)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================

# Fix is_public as a boolean value
# Default value for redirect_type if upgrading from https://github.com/scith/redirect_ynh
if [ -z "$redirect_type" ];
then
    redirect_type="proxy"
    ynh_app_setting_set $app 'redirect_type' $redirect_type
fi

# Migrate away from old stuff with 'is_public' and old redirect type names
is_public=$(ynh_app_setting_get "$app" is_public)
if [ -n "$is_public" ]
then
    if [ "$is_public" = "Yes" ]; then
        is_public=1
    elif [ "$is_public" = "No" ]; then
        is_public=0
    fi

    if [ "$is_public" = "0" ] && [ "$redirect_type" != "proxy" ]; then
       echo "WARNING: You previously had a 'supposedly' private 301 or 302 redirection... but it was found that it was public all along and it is not easy to create such a private redirection. Your 301 or 302 redirection will be re-flagged as public..." >&2
       is_public=1
    fi

    if [ "$redirect_type" == "proxy" ] && [ "$is_public" = "1" ]
    then
        redirect_type="public_proxy"
    elif [ "$redirect_type" == "proxy" ] && [ "$is_public" = "0" ]
    then
        redirect_type="private_proxy"
    elif [ "$redirect_type" == "visible_302" ]
    then
        redirect_type="public_302"
    elif [ "$redirect_type" == "visible_301" ]
    then
        redirect_type="public_301"
    fi
    
    ynh_app_setting_set $app 'redirect_type' $redirect_type
fi

# Migrate legacy permissions to new system
if ynh_legacy_permissions_exists
then
    ynh_legacy_permissions_delete_all

    ynh_app_setting_delete --app=$app --key=is_public
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

# Validate redirect path
url_regex='(https?|ftp|file)://[-A-Za-z0-9\+&@#/%?=~_|!:,.;]*[-A-Za-z0-9\+&@#/%=~_|]'
[[ ! $redirect_path =~ $url_regex ]] && ynh_die "Invalid destination: $redirect_path" 1

#=================================================
# CONFIGURE NGINX
#=================================================

# Nginx configuration
for FILE in $(ls ../conf/nginx-*.conf)
do
    ynh_replace_string "YNH_LOCATION" "$path_url" $FILE
done
if [ "$redirect_type" = "public_302" ];
then
    ynh_replace_string "YNH_REDIRECT_PATH" "$redirect_path" ../conf/nginx-visible-302.conf
    cp ../conf/nginx-visible-302.conf /etc/nginx/conf.d/$domain.d/$app.conf
elif [ "$redirect_type" = "public_301" ];
then
    ynh_replace_string "YNH_REDIRECT_PATH" "$redirect_path" ../conf/nginx-visible-301.conf
    cp ../conf/nginx-visible-301.conf /etc/nginx/conf.d/$domain.d/$app.conf
elif [ "$redirect_type" = "public_proxy" ] || [ "$redirect_type" = "private_proxy" ];
then
    ynh_replace_string "YNH_REDIRECT_PATH" "$redirect_path" ../conf/nginx-proxy.conf
    cp ../conf/nginx-proxy.conf /etc/nginx/conf.d/$domain.d/$app.conf
fi

#=================================================
# CONFIGURE SSOWAT
#=================================================

# Make app public if necessary
if [ "$redirect_type" != "private_proxy" ]
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