#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=1

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)
port=$(ynh_app_setting_get --app=$app --key=port)
admin=$(ynh_app_setting_get --app=$app --key=admin)
hashedpassword=$(ynh_app_setting_get --app=$app --key=hashedpassword)

#=================================================
# CHECK VERSION
#=================================================

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

# 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

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

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

# If admin or password do not exist, assign the standard ones and have them replaced upon first login
if [ -z "$admin" ] || [ -z "$hashedpassword" ]; then
	admin="admin"
	hashedpassword='$argon2i$v=19$m=4096,t=3,p=1$/VYxjWHBzbkuCEO6Hh0AUw$nJaTJtth57vCAyYvg+UbtnscilR0UcE02AfLOhERe3A'
	pass_set="false"
	ynh_app_setting_set --app=$app --key=admin --value=$admin
	ynh_app_setting_set --app=$hashedpassword --key=hashedpassword --value=$hashedpassword

        # Setup user credentials file
        echo "{\"$admin\":{\"name\":\"$admin\",\"pass_set\":$pass_set,\"hash\":\"$hashedpassword\"}}" > "$final_path/src/etc/passwd"
else
	pass_set="true"
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=3

# 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 a systemd service..." --weight=1

ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=1

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"
fi

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading nginx web server configuration..." --weight=1

# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=2

ynh_install_app_dependencies $pkg_dependencies

if [ $nodejs_version != $(ynh_app_setting_get --app=$app --key=nodejs_version) ]; then
	ynh_remove_nodejs
	ynh_install_nodejs --nodejs_version=$nodejs_version
fi

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1

# Create a dedicated user (if not existing)
ynh_system_user_create $app $final_path

#=================================================
# SPECIFIC UPGRADE
#=================================================
# NPM INSTALL
#=================================================
ynh_script_progression --message="Performing Node app installation..." --weight=3

chown -R $app: $final_path

ynh_use_nodejs

pushd $final_path/src
	ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH HOME=$final_path $ynh_npm install node-gyp
	ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH HOME=$final_path $ynh_npm install argon2-cli
	ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH HOME=$final_path $ynh_npm install
	ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH HOME=$final_path $ynh_npm audit fix
popd

#=================================================
# MODIFY A CONFIG FILE
#=================================================

# Setup env file
mkdir -p $final_path
env_file=$final_path/src/.env
touch $env_file
chmod 600 $env_file

echo "ZT_TOKEN=$(</var/lib/zerotier-one/authtoken.secret)" >> $env_file
echo "ZT_ADDR=localhost:$(</var/lib/zerotier-one/zerotier-one.port)" >> $env_file
echo "HTTP_PORT=$port" >> $env_file

#=================================================
# LINK CERTIFICATES
#=================================================

# Even though one can stay in HTTP mode, the ztncui requires SSL certificates
# let's use the ones of the domain
pushd $final_path/src/etc/tls
	cp -f /etc/yunohost/certs/$domain/key.pem privkey.pem
	cp -f /etc/yunohost/certs/$domain/crt.pem fullchain.pem
popd

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..." --weight=1

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

# Set permissions on app files
chown -R $app: $final_path

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1

yunohost service add $app --description "ZeroTier network controller user interface" --log "/var/log/$app/$app.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1

ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"

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

if [ $pass_set = "false" ]; then
	ynh_print_warn --message="Default ztncui credentials were reset: admin/password"
fi