package main

import (
	"fmt"
	"os"
	"time"

	"github.com/godbus/dbus/v5"
)

var DATETIME_FORMAT = "02-01-2006 15:03"

func main() {
	conn, err := dbus.ConnectSessionBus()
	if err != nil {
		fmt.Fprintln(os.Stderr, "Failed to connect to session bus:", err)
		os.Exit(1)
	}
	defer conn.Close()

	// https://github.com/godbus/dbus/blob/master/_examples/monitor.go
	rules := []string{
		"type='signal',member='Notify',path='/org/freedesktop/Notifications',interface='org.freedesktop.Notifications'",
		"type='method_call',member='Notify',path='/org/freedesktop/Notifications',interface='org.freedesktop.Notifications'",
		"type='method_return',member='Notify',path='/org/freedesktop/Notifications',interface='org.freedesktop.Notifications'",
		"type='error',member='Notify',path='/org/freedesktop/Notifications',interface='org.freedesktop.Notifications'",
	}
	var flag uint = 0

	call := conn.BusObject().Call("org.freedesktop.DBus.Monitoring.BecomeMonitor", 0, rules, flag)
	if call.Err != nil {
		fmt.Fprintln(os.Stderr, "Failed to become monitor:", call.Err)
		os.Exit(1)
	}

	c := make(chan *dbus.Message, 10)
	conn.Eavesdrop(c)
	for v := range c {
		if len(v.Body) >= 5 {
			currentTime := time.Now()
			appName := fmt.Sprintf("%v", v.Body[0])
			summary := fmt.Sprintf("%v", v.Body[3])
			body := fmt.Sprintf("%v", v.Body[4])
			fmt.Printf("%s\n%s %s\n%s\n\n",
				datetimeStyle.Render(currentTime.Format(DATETIME_FORMAT)),
				appNameStyle.Render(appName),
				summaryStyle.Render(summary),
				bodyStyle.Render(body),
			)
		}
	}
}