#!/bin/bash

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

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

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

app=$YNH_APP_INSTANCE_NAME

firmware_nonfree=$(ynh_app_setting_get --app=$app --key=firmware_nonfree)
service_name=$(ynh_app_setting_get --app=$app --key=service_name)

wifi_device=$(ynh_app_setting_get --app=$app --key=wifi_device)
wifi_ssid=$(ynh_app_setting_get --app=$app --key=wifi_ssid)
wifi_secure=$(ynh_app_setting_get --app=$app --key=wifi_secure)
wifi_passphrase=$(ynh_app_setting_get --app=$app --key=wifi_passphrase)
wifi_channel=$(ynh_app_setting_get --app=$app --key=wifi_channel)
advanced=$(ynh_app_setting_get --app=$app --key=advanced)
ip4_nat_prefix=$(ynh_app_setting_get --app=$app --key=ip4_nat_prefix)
ip6_net=$(ynh_app_setting_get --app=$app --key=ip6_net)
ip6_firewall=$(ynh_app_setting_get --app=$app --key=ip6_firewall)
dns=$(ynh_app_setting_get --app=$app --key=dns)
multissid=$(ynh_app_setting_get --app=$app --key=multissid)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..."

upgrade_type=$(ynh_check_app_version_changed)

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

# 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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping the hotspot service ... (this may take some time)"
yunohost service stop $service_name

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..."

if [ -d /var/www/wifiadmin/ ]; then
    ynh_secure_remove /var/www/wifiadmin/
fi

if [ -e /etc/dnsmasq.d/$app.conf ]; then
    ynh_secure_remove /etc/dnsmasq.d/$app.conf
fi

if [ $firmware_nonfree = "yes" ]; then
	firmware_nonfree=1
	ynh_app_setting_set --app=$app --key=firmware_nonfree --value=$firmware_nonfree
elif [ $firmware_nonfree = "no" ]; then
	firmware_nonfree=0
	ynh_app_setting_set --app=$app --key=firmware_nonfree --value=$firmware_nonfree
fi

if [ -z $service_name ]; then
	service_name="ynh-$app"
	ynh_app_setting_set --app=$app --key=service_name --value=$service_name
fi

if [[ -n "${multissid}" ]] && [[ "${multissid}" -gt 1 ]]; then
	wifi_ssid=$(cut -d'|' -f 1 <<< ${wifi_ssid})
	wifi_secure=$(cut -d'|' -f 1 <<< ${wifi_secure})
	wifi_passphrase=$(cut -d'|' -f 1 <<< ${wifi_passphrase})
	advanced=$(cut -d'|' -f 1 <<< ${advanced})
	ip4_nat_prefix=$(cut -d'|' -f 1 <<< ${ip4_nat_prefix})
	ip6_net=$(cut -d'|' -f 1 <<< ${ip6_net})
	ip6_firewall=$(cut -d'|' -f 1 <<< ${ip6_firewall})
	dns=$(cut -d'|' -f 1 <<< ${dns})

	ynh_app_setting_set --app=$app --key=wifi_ssid --value="${wifi_ssid}"
	ynh_app_setting_set --app=$app --key=wifi_secure --value="${wifi_secure}"
	ynh_app_setting_set --app=$app --key=wifi_passphrase --value="${wifi_passphrase}"
	ynh_app_setting_set --app=$app --key=ip4_nat_prefix --value="${ip4_nat_prefix}"
	ynh_app_setting_set --app=$app --key=ip6_net --value="${ip6_net}"
	ynh_app_setting_set --app=$app --key=ip6_firewall --value="${ip6_firewall}"
fi

if [[ -n "${dns}" ]]; then
    ip6_dns=""
    ip4_dns=""
    for ip in $(echo "${dns}" | tr ',' ' '); do
        if [[ "$ip" == *":"* ]]; then
            ip6_dns+="[$ip],"
        else
            ip4_dns+="$ip,"
        fi
    done
    # Remove trailing ,
    ip6_dns="${ip6_dns%%,}"
    ip4_dns="${ip4_dns%%,}"

	if [[ -z "$(ynh_app_setting_get --app=$app --key=ip6_dns)" ]]; then
		ynh_app_setting_set --app=$app --key=ip6_dns --value="${ip6_dns}"
	fi
	if [[ -z "$(ynh_app_setting_get --app=$app --key=ip4_dns)" ]]; then
		ynh_app_setting_set --app=$app --key=ip4_dns --value="${ip4_dns}"
	fi

	ynh_app_setting_delete $app dns
else
    ip6_dns=$(ynh_app_setting_get --app=$app --key=ip6_dns)
    ip4_dns=$(ynh_app_setting_get --app=$app --key=ip4_dns)
fi

if [[ -n "${multissid}" ]]; then
    ynh_app_setting_delete --app=$app --key=multissid

	ynh_secure_remove --file="/etc/hostapd/hostapd.conf"
	ynh_secure_remove --file="/etc/hostapd/hostapd.base.conf"
	ynh_secure_remove --file="/etc/hostapd/hostapd.accesspoint.conf"
	ynh_secure_remove --file="/etc/dnsmasq.dhcpd/"
fi

if [[ -z "${advanced}" ]]; then
    ynh_app_setting_set --app=$app --key=advanced --value=0
fi

# Old stuff prior to 2.x

ip6_net=$(ynh_app_setting_get --app=$app --key=ip6_net)
if [ "$ip6_net" == "none" ]
then
    ip6_net=""
	ynh_app_setting_set --app=$app --key=ip6_net --value="$ip6_net"
fi

if [ -f /etc/nginx/conf.d/*.d/$app.conf ]; then
	ynh_secure_remove /etc/nginx/conf.d/*.d/$app.conf
    ynh_systemd_action --service_name=nginx --action=reload
fi

for php_path in $(ls /etc/php/*/fpm/pool.d/$app.conf 2> /dev/null); do
	ynh_secure_remove $php_path
done

if [ -d /var/www/$app ]; then
	ynh_secure_remove /var/www/$app
fi

[ -z "$(ynh_app_setting_get $app domain)" ] || ynh_app_setting_delete $app domain
[ -z "$(ynh_app_setting_get $app path)" ] || ynh_app_setting_delete $app path
[ -z "$(ynh_app_setting_get $app final_path)" ] || ynh_app_setting_delete $app final_path

if [ -e "/etc/sudoers.d/${app}_ynh" ]; then
  ynh_secure_remove "/etc/sudoers.d/${app}_ynh"
fi

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..."

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..."

if [[ $firmware_nonfree -eq 1 ]]; then
	check_armbian_nonfree_conflict
	ynh_install_extra_app_dependencies --repo="deb http://deb.debian.org/debian $(ynh_get_debian_release) non-free" --package="$nonfree_firmware_packages"
else
	pkg_dependencies="$pkg_dependencies $free_firmware_packages"
fi

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# SPECIFIC UPGRADE
#=================================================
# COPY CONFIGS
#=================================================
ynh_script_progression --message="Copying configuration..."

hot_reload_usb_wifi_cards
if [[ -z "$wifi_device" ]] || ! grep -q -F "$wifi_device" <(unused_iw_devices); then
	wifi_device="$(unused_iw_devices | head -n 1)"
	ynh_app_setting_set --app=$app --key=wifi_device --value="${wifi_device}"
fi

mkdir -pm 0755 /etc/hostapd/$app/
chown root: /etc/hostapd/$app/

mkdir -pm 0755 /etc/dnsmasq.$app/
chown root: /etc/dnsmasq.$app/

if [[ -n "${wifi_device}" ]]; then 
    configure_hostapd
    configure_dhcp
fi

# Copy init script
ynh_add_config --template="../conf/ynh-hotspot" --destination="/usr/local/bin/$service_name"
chmod 0755 "/usr/local/bin/$service_name"

# Copy openvpn scripts
mkdir -pm 0755 /etc/openvpn/scripts
mkdir -pm 0755 /etc/openvpn/scripts/route-up.d
mkdir -pm 0755 /etc/openvpn/scripts/route-down.d
ynh_add_config --template="../conf/openvpn_90-hotspot" --destination="/etc/openvpn/scripts/route-up.d/90-$service_name"
ynh_add_config --template="../conf/openvpn_90-hotspot" --destination="/etc/openvpn/scripts/route-down.d/90-$service_name"
chmod 0755 "/etc/openvpn/scripts/route-up.d/90-${service_name}"
chmod 0755 "/etc/openvpn/scripts/route-down.d/90-${service_name}"

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..."

# Create a dedicated systemd config
ynh_add_systemd_config --service=$service_name
# Create custom systemd config for hostapd to handle multiple wifi devices
ynh_add_systemd_config --service="hostapd@$app" --template="../conf/systemd_hostapd.service"

#=================================================
# GENERIC FINALIZATION
#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..."

yunohost service add $service_name --description "Creates a Wi-Fi access point" --test_status "systemctl is-active hostapd@$app" --need_lock

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting the hotspot service..."

if [[ -z $wifi_device ]]; then
	ynh_app_setting_set --app=$app --key=service_enabled --value=0
	wifi_device=""
else
	ynh_app_setting_set --app=$app --key=service_enabled --value=1
fi

# Start a systemd service if device is present
if [[ $wifi_device == "" ]]; then
	echo "WARNING: Wifi Hotspot is not started because no wifi device was found (please, check the web admin)" >&2
else
    yunohost service start $service_name
fi

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Upgrade of $app completed"