#!/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)
datadir=$(ynh_app_setting_get --app=$app --key=datadir)

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

### This helper will compare the version of the currently installed app and the version of the upstream package.
### $upgrade_type can have 2 different values
### - UPGRADE_APP if the upstream app version has changed
### - UPGRADE_PACKAGE if only the YunoHost package has changed
### ynh_check_app_version_changed will stop the upgrade if the app is up to date.
### UPGRADE_APP should be used to upgrade the core app only if there's an upgrade to do.
upgrade_type=$(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)..." --weight=1

# 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 systemd services..." --weight=1

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

systemctl disable $app.socket --quiet
systemctl disable $app --quiet
systemctl disable $app-beat --quiet
systemctl disable $app-celery --quiet

#=================================================
# 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=1

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# 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 --username=$app

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPDATE VIRTUALENV
#=================================================
ynh_script_progression --message="Upgrading Python virtualenv..." --weight=2

pushd $final_path || ynh_die
	source $final_path/venv/bin/activate
	python3 -m pip install -U wheel pip setuptools
	python3 -m pip install -U --requirement $final_path/requirements.txt
	python3 -m pip install -U --requirement $final_path/requirements-setup.txt
	python3 -m pip install -U --requirement $final_path/requirements-ynh.txt
	deactivate 'dummy_arg'
popd || ynh_die

#=================================================
# PERFORM DATABASE MIGRATIONS
#=================================================
ynh_script_progression --message="Performing database migrations..." --weight=2

pushd $final_path || ynh_die
	source $final_path/venv/bin/activate
	envdir $final_path/envs/prod python3 $final_path/manage.py makemigrations
	envdir $final_path/envs/prod python3 $final_path/manage.py migrate
	deactivate 'dummy_arg'
popd || ynh_die

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

# Create a dedicated systemd config
ynh_add_systemd_config
ynh_add_systemd_config --service="$app-socket" --template systemd.socket
ynh_add_systemd_config --service="$app-celery" --template systemd-celery.service
ynh_add_systemd_config --service="$app-beat" --template systemd-beat.service
systemctl disable "$app-socket.service" --quiet
mv "/etc/systemd/system/$app-socket.service" "/etc/systemd/system/$app.socket"
systemctl daemon-reload --quiet

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

# Set permissions on app files
chown -R root:$app $final_path
chmod -R o-rwx $final_path
chmod -R g-w $final_path
setfacl -n -R -m user:www-data:rx -m default:user:www-data:rx $final_path
setfacl -n -R -m user:www-data:- -m default:user:www-data:- $final_path/envs
chown -R $app:$app $datadir
chmod o-rwx $datadir
setfacl -n -R -m user:www-data:rx -m default:user:www-data:rx $datadir

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

yunohost service add $app --description="Manage podcast subscriptions, and sync them between apps and devices" --log="/var/log/$app/$app.log"

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

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