#!/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

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
firmware_nonfree=$(ynh_app_setting_get --app=$app --key=firmware_nonfree)
service_name=$(ynh_app_setting_get --app=$app --key=service_name)
phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)

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

upgrade_type=$(ynh_check_app_version_changed)

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

if [ -z $phpversion ]; then
	phpversion=7.0
	ynh_app_setting_set --app=$app --key=phpversion --value=$phpversion
fi

# If final_path doesn't exist, create it
if [ -z "$final_path" ]; then
	final_path=/var/www/$app
	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
fi

if [ -d /var/www/wifiadmin/ ]; then
	mv /var/www/wifiadmin $final_path
	mv /etc/php/7.0/fpm/pool.d/wifiadmin.conf /etc/php/$phpversion/fpm/pool.d/$app.conf
	ynh_replace_string --match_string="wifiadmin" --replace_string="$app" --target_file=/etc/php/$phpversion/fpm/pool.d/$app.conf
	ynh_systemd_action --service_name=php$phpversion-fpm --action=reload
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 $service_name ]; then
	service_name="ynh-hotspot"
	ynh_app_setting_set --app=$app --key=service_name --value=$service_name
fi

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

#=================================================
# CHECK THE PATH
#=================================================

# Normalize the URL path syntax
path_url=$(ynh_normalize_url_path --path_url=$path_url)

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

ynh_systemd_action --service_name=$service_name --action="stop" --log_path=systemd #--line_match="Started YunoHost Wifi Hotspot"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..."

	# Download, check integrity, uncompress and patch the source from app.src
	cp -a ../sources/* ${final_path}/
fi

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading nginx web server configuration..."

# Create a dedicated nginx config
ynh_add_nginx_config

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

if [[ $firmware_nonfree -eq 1 ]]; then
  packages=$nonfree_packages
else
  packages=$free_packages
fi

ynh_install_app_dependencies "$pkg_dependencies" "$packages"

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

#=================================================
# PHP-FPM CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading php-fpm configuration..."

# Create a dedicated php-fpm config
ynh_add_fpm_config
phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)

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

mkdir -pm 0755 /etc/dnsmasq.dhcpd/
chown root: /etc/dnsmasq.dhcpd/

install -b -o root -g root -m 0644 ../conf/hostapd.conf.tpl? /etc/hostapd/
install -b -o root -g root -m 0644 ../conf/dnsmasq_dhcpdv6.conf.tpl /etc/dnsmasq.dhcpd/dhcpdv6.conf.tpl
install -b -o root -g root -m 0644 ../conf/dnsmasq_dhcpdv4.conf.tpl /etc/dnsmasq.dhcpd/dhcpdv4.conf.tpl

# Copy init script
install -o root -g root -m 0755 ../conf/$service_name /usr/local/bin/
ynh_replace_string --match_string="__PHPVERSION__" --replace_string="${phpversion}" --target_file="/usr/local/bin/$service_name"

#=================================================
# MODIFY A CONFIG FILE
#=================================================
ynh_script_progression --message="Modifying a config file..."

ynh_backup_if_checksum_is_different --file="$final_path/config.php"
ynh_replace_string --match_string="__PATH__" --replace_string="${path_url}" --target_file="$final_path/config.php"
# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file="$final_path/config.php"

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

# Create a dedicated systemd config
ynh_add_systemd_config --service=$service_name

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================
ynh_script_progression --message="Securing files and directories..."

# Set permissions on app files
chown -R $app: ${final_path}/
chmod -R 0644 ${final_path}/*
find ${final_path}/ -type d -exec chmod +x {} \;

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

yunohost service add $service_name --description "Creates a Wi-Fi access point" --need_lock

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

wifi_device=$(bash ../conf/iw_devices | awk -F\| '{ print $1 }')

if [[ -z $wifi_device ]]; then
  ynh_app_setting_set --app=$app --key=service_enabled --value=0
  wifi_device=none
else
  ynh_app_setting_set --app=$app --key=service_enabled --value=1
fi

# Start a systemd service if device is present
if [[ $wifi_device == none ]]; then
  echo "WARNING: Wifi Hotspot is not started because no wifi device was found (please, check the web admin)" >&2
else
  ynh_systemd_action --service_name=$service_name --action="start" --log_path=systemd #--line_match="Started YunoHost Wifi Hotspot"
fi

#=================================================
# 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="Upgrade of $app completed"