#!/bin/bash

pkg_dependencies="$pkg_dependencies uwsgi uwsgi-plugin-python3 uwsgi-plugin-python"

# Check if system wide templates are available and correcly configured
#
# usage: ynh_check_global_uwsgi_config
ynh_check_global_uwsgi_config () {
	uwsgi --version || ynh_die --message="You need to add uwsgi (and appropriate plugin) as a dependency"

	cat > /etc/systemd/system/uwsgi-app@.service <<EOF
[Unit]
Description=%i uWSGI app
After=syslog.target

[Service]
RuntimeDirectory=%i
ExecStart=/usr/bin/uwsgi \
        --ini /etc/uwsgi/apps-available/%i.ini \
        --socket /run/%i/app.socket \
        --logto /var/log/uwsgi/%i/%i.log
User=%i
Group=www-data
Restart=always
RestartSec=10
KillSignal=SIGQUIT
Type=notify
StandardError=syslog
NotifyAccess=all

[Install]
WantedBy=multi-user.target
EOF

	systemctl daemon-reload
}

# Create a dedicated uwsgi ini file to use with generic uwsgi service
#
# usage: ynh_add_uwsgi_service [--service=service] [--template=template]
# | arg: -s, --service=     - Service name (optionnal, `$app` by default)
# | arg: -t, --template=    - Name of template file (optionnal, this is 'systemd' by default, meaning `../conf/systemd.service` will be used as template)
#
# This will use a template in ../conf/uwsgi.ini
# 
# Note that the service need to be started manually at the end of the installation.
# Generally you can start the service with this command:
# ynh_systemd_action --service_name "uwsgi-app@$service.service" --line_match "WSGI app 0 \(mountpoint='[/[:alnum:]_-]*'\) ready in [[:digit:]]* seconds on interpreter" --log_path "/var/log/uwsgi/$service/$service.log"
#

# to interact with your service: `systemctl <action> uwsgi-app@app`
ynh_add_uwsgi_service () {
    # Declare an array to define the options of this helper.
    local legacy_args=st
    local -A args_array=([s]=service= [t]=template=)
    local service
    local template
    # Manage arguments with getopts
    ynh_handle_getopts_args "$@"
    service="${service:-$app}"
    template="${template:-uwsgi.ini}"

	ynh_check_global_uwsgi_config

	# www-data group is needed since it is this nginx who will start the service
	usermod --append --groups www-data "$service" || ynh_die --message="It wasn't possible to add user $service to group www-data"

	ynh_add_config --template="$YNH_APP_BASEDIR/conf/$template" --destination="/etc/uwsgi/apps-available/$service.ini"

	chown $service:root "/etc/uwsgi/apps-available/$service.ini"

	# make sure the folder for logs exists and set authorizations
	mkdir -p /var/log/uwsgi/$service
	chown $service:root /var/log/uwsgi/$service
	chmod -R u=rwX,g=rX,o= /var/log/uwsgi/$service

	# Setup specific Systemd rules if necessary
	test -e ../conf/uwsgi-app@override.service && \
		mkdir /etc/systemd/system/uwsgi-app@$service.service.d && \
		cp ../conf/uwsgi-app@override.service /etc/systemd/system/uwsgi-app@$service.service.d/override.conf

	systemctl enable "uwsgi-app@$service.service" --quiet
	systemctl daemon-reload

	# Add as a service
	yunohost service add "uwsgi-app@$service" --log "/var/log/uwsgi/$service/$service.log"
}

# Remove the dedicated uwsgi ini file
#
# usage: ynh_remove_uwsgi_service [--service=service]
# | arg: -s, --service=     - Service name (optionnal, $app by default)
#
ynh_remove_uwsgi_service () {
    # Declare an array to define the options of this helper.
    local legacy_args=s
    local -A args_array=([s]=service=)
    local service
    # Manage arguments with getopts
    ynh_handle_getopts_args "$@"
    local service="${service:-$app}"

	local finaluwsgiini="/etc/uwsgi/apps-available/$service.ini"
	if [ -e "$finaluwsgiini" ]; then
		yunohost service remove "uwsgi-app@$service"
		systemctl stop "uwsgi-app@$service.service"
		systemctl disable "uwsgi-app@$service.service" --quiet
		ynh_secure_remove --file="$finaluwsgiini"
		ynh_secure_remove --file="/var/log/uwsgi/$service"
		ynh_secure_remove --file="/etc/systemd/system/uwsgi-app@$service.service.d"
	fi
}

# Restore the dedicated uwsgi config
# Should be used in restore script
#
# usage: ynh_restore_uwsgi_service [--service=service]
# | arg: -s, --service=     - Service name (optionnal, $app by default)
ynh_restore_uwsgi_service () {
    # Declare an array to define the options of this helper.
    local legacy_args=s
    local -A args_array=([s]=service=)
    local service
    # Manage arguments with getopts
    ynh_handle_getopts_args "$@"
    service="${service:-$app}"

    ynh_check_global_uwsgi_config
    systemctl enable "uwsgi-app@$service" --quiet
    yunohost service add "uwsgi-app@$service" --log "/var/log/uwsgi/$service/$service.log"
}