#!/bin/bash

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

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

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

ynh_clean_setup () {
	ynh_clean_check_starting
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================

domain=$YNH_APP_ARG_DOMAIN
path_url="/"
is_public=$YNH_APP_ARG_IS_PUBLIC
node_type=$YNH_APP_ARG_NODE_TYPE
server_ip=$YNH_APP_ARG_SERVER_IP

app=$YNH_APP_INSTANCE_NAME

lxc_bridge="lxcbr0"
plage_ip="10.1.44"
main_iface=$(ip route | grep default | awk '{print $5;}')

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..."

# Register (book) web path
ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..."

ynh_app_setting_set --app=$app --key=domain --value=$domain
ynh_app_setting_set --app=$app --key=path --value=$path_url
ynh_app_setting_set --app=$app --key=node_type --value=$node_type
ynh_app_setting_set --app=$app --key=server_ip --value=$server_ip
ynh_app_setting_set --app=$app --key=lxc_bridge --value=$lxc_bridge
ynh_app_setting_set --app=$app --key=plage_ip --value=$plage_ip
ynh_app_setting_set --app=$app --key=main_iface --value=$main_iface

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_script_progression --message="Finding an available port..."

# Find an available port
http_port=4646
ynh_port_available --port=$http_port || ynh_die --message="Port $http_port is needs to be available for this app"
ynh_app_setting_set --app=$app --key=http_port --value=$http_port

rpc_port=4647
ynh_port_available --port=$rpc_port || ynh_die --message="Port $rpc_port is needs to be available for this app"
ynh_app_setting_set --app=$app --key=rpc_port --value=$rpc_port

serf_port=4648
ynh_port_available --port=$serf_port || ynh_die --message="Port $serf_port is needs to be available for this app"
ynh_app_setting_set --app=$app --key=serf_port --value=$serf_port

# Open the port
ynh_script_progression --message="Configuring firewall..."
ynh_exec_warn_less yunohost firewall allow --no-upnp TCP $rpc_port
needs_exposed_ports="$rpc_port"
if [ "$node_type" == "server" ]
then
	ynh_exec_warn_less yunohost firewall allow --no-upnp TCP $serf_port
	needs_exposed_ports="$serf_port $needs_exposed_ports"
fi

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..."

if [ "$node_type" == "client" ]
then
	ynh_install_app_dependencies $client_pkg_dependencies
	ynh_exec_warn_less ynh_install_go --go_version=$go_version
fi
ynh_install_extra_app_dependencies --repo="deb https://apt.releases.hashicorp.com $(lsb_release -cs) main" --package="$pkg_dependencies" --key="https://apt.releases.hashicorp.com/gpg"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..."

# Create a system user
ynh_system_user_create --username=$app

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring NGINX web server..."

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC SETUP
#=================================================
# CREATE DATA DIRECTORY
#=================================================
ynh_script_progression --message="Creating a data directory..."

datadir=/home/yunohost.app/$app
ynh_app_setting_set --app=$app --key=datadir --value=$datadir

mkdir -p $datadir
mkdir -p $datadir/plugins

chmod 750 "$datadir"
chmod -R o-rwx "$datadir"
chown -R $app:$app "$datadir"

#=================================================
# BUILD LXC DRIVER
#=================================================

if [ "$node_type" == "client" ]
then
	ynh_script_progression --message="Building LXC driver..."

	tempdir="$(mktemp -d)"
	ynh_setup_source --dest_dir="$tempdir" --source_id="driver-lxc"

	pushd $tempdir
		final_path=$tempdir
		ynh_use_go
		export GOPATH="$tempdir/go"
		export GOCACHE="$tempdir/.cache"
		ynh_exec_warn_less $ynh_go build
	popd

	mv -f $tempdir/nomad-driver-lxc $datadir/plugins/nomad-driver-lxc

	ynh_secure_remove --file="$tempdir"
fi

#=================================================
# ADD A CONFIGURATION
#=================================================
ynh_script_progression --message="Adding a configuration file..."

config_path=/etc/$app.d
ynh_app_setting_set --app=$app --key=config_path --value=$config_path

mkdir -p $config_path
chmod 750 "$config_path"
chmod -R o-rwx "$config_path"
chown -R $app:$app "$config_path"

ynh_add_config --template="../conf/nomad.hcl" --destination="$config_path/nomad.hcl"
chmod 400 "$config_path/nomad.hcl"
chown $app:$app "$config_path/nomad.hcl"

if [ "$node_type" == "server" ]
then
	ynh_add_config --template="../conf/server.hcl" --destination="$config_path/server.hcl"
	chmod 400 "$config_path/server.hcl"
	chown $app:$app "$config_path/server.hcl"
fi

if [ "$node_type" == "client" ]
then
	ynh_add_config --template="../conf/client.hcl" --destination="$config_path/client.hcl"
	chmod 400 "$config_path/client.hcl"
	chown $app:$app "$config_path/client.hcl"

	ynh_add_config --template="../conf/driver-lxc.hcl" --destination="$config_path/driver-lxc.hcl"
	chmod 400 "$config_path/driver-lxc.hcl"
	chown $app:$app "$config_path/driver-lxc.hcl"

	ynh_add_config --template="../conf/dnsmasq-lxd" --destination="/etc/dnsmasq.d/lxd"
	systemctl restart dnsmasq

	if [ ! ${PACKAGE_CHECK_EXEC:-0} -eq 1 ]; then
		ynh_add_config --template="../conf/lxc-net" --destination="/etc/default/lxc-net"
	fi
	ynh_add_config --template="../conf/default.conf" --destination="/etc/lxc/default.conf"
	systemctl enable lxc-net --quiet
	ynh_systemd_action --service_name=lxc-net --action="restart" --line_match="Started LXC network bridge" --log_path="systemd"
fi

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..."

systemd_user=$app
if [ "$node_type" == "client" ]
then
	systemd_user="root"
fi
# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Configuring log rotation..."

# Use logrotate to manage application logfile(s)
ynh_use_logrotate

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

yunohost service add $app --log="/var/log/$app/$app.log" --needs_exposed_ports $needs_exposed_ports

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

# Start a systemd service
ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log" --line_match="Nomad agent started"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring permissions..."

# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# Everyone can access the app.
	# The "main" permission is automatically created before the install script.
	ynh_permission_update --permission="main" --add="visitors"
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="Installation of $app completed"