package main

import "fmt"
import "log"
import "time"
import "os/exec"
import "github.com/hypebeast/go-osc/osc"

// Overlay object
type Overlay struct {
	title	string
	t	int
	show_t	bool
}

//type Title struct {
//	title	string
//}
//
//type Timer struct {
//	t	int
//	visible	bool
//}

//type MediaPlayer interface {
//	set() string
//}

//type Titler interface {
//	set() string
//}
//
//func (tit *Title)set(title string) {
//	fmt.Print("")
//	fmt.Printf("      %-160s %6d  ", title, t)
//}

// Updates title of bar in Overlay object
func update_title(title string, t int) {
	fmt.Print("")
	fmt.Printf("      %-160s %6d  ", title, t)
}

// Run executable
func run(output chan string, cmd string, args ...string) {
	// Find executable
	path, err := exec.LookPath(cmd)
	if err != nil {
		fmt.Printf("can't find '%s'\n", cmd)
	} else {
		fmt.Printf("'%s' executable is in '%s'\n", cmd, path)
	}

	out, err := exec.Command(path, args...).Output()
	if err != nil {
		log.Print(err)
	}
	log.Printf("%s\n", out)
	output <- string(out)
}

// Play media file via mpv, osc message sets the file path
func play(msg *osc.Message) {
	var uri string;
	ch := make(chan string)
	for _, arg := range msg.Arguments {
		switch arg.(type) {
		case string:
			uri = arg.(string)
		}
	}
	run(ch, "mpv", "-fs", "--audio-device=alsa/hdmi", uri)
}

func main() {
	addr := "0.0.0.0:9137"
	d := osc.NewStandardDispatcher()
	ovly := Overlay{"DECRUNCH Screen...", 0, true}

	d.AddMsgHandler("/8bus/ovly/title", func(msg *osc.Message) {
		for _, arg := range msg.Arguments {
			switch arg.(type) {
			case string:
				ovly.title = arg.(string)
			}
		}
		update_title(ovly.title, 0)
	})

	ticker := time.NewTicker(time.Second)
	d.AddMsgHandler("/8bus/ovly/timer/reset", func (msg *osc.Message) {
		ovly.t = 0
		ticker.Reset(time.Second)
		update_title(ovly.title, 0)
	})

	d.AddMsgHandler("/8bus/ovly/video/play", play)

	// Main loop
	//done := make(chan bool)
	go func() {
		for {
			select {
			//case <-done:
			//	return
			case <-ticker.C:
				ovly.t += 1
				update_title(ovly.title, ovly.t)
			}
		}
	}()

	// Disable cursor, move it home and clear the terminal
	fmt.Print("[?25l")

	// Set up and start OSC server
	server := &osc.Server{
		Addr:       addr,
		Dispatcher: d,
	}
	server.ListenAndServe()

	// Enable cursor
	fmt.Print("[?25h")
}