package main

/*
#cgo CFLAGS: -x objective-c
#cgo LDFLAGS: -framework Foundation
#include "handler.h"
*/
import "C"

import (
	"log"

	"github.com/andlabs/ui"
)

// Sources used to figure this out:
// Info.plist: https://gist.github.com/chrissnell/db95a3c5ad6ceca4c673e96cca0f7548
// custom url handler example: http://fredandrandall.com/blog/2011/07/30/how-to-launch-your-macios-app-with-a-custom-url/
// obj-c example: https://gist.github.com/leepro/016d7d6b61021dfc67daf61771c92b3c
// note: import .h, not .m

var labelText chan string

func main() {
	log.SetFlags(log.Lshortfile)

	labelText = make(chan string, 1) // the event handler blocks!, so buffer the channel at least once to get the first message
	C.StartURLHandler()

	err := ui.Main(func() {
		greeting := ui.NewLabel("greeting\nline 2")
		window := ui.NewWindow("Hello", 200, 100, true)
		window.SetChild(greeting)
		window.OnClosing(func(*ui.Window) bool {
			ui.Quit()
			return true
		})
		window.Show()

		go func() {
			for text := range labelText {
				ui.QueueMain(func() {
					greeting.SetText(text)
				})
			}
		}()
	})
	if err != nil {
		log.Fatal(err)
	}
}

//export HandleURL
func HandleURL(u *C.char) {
	labelText <- C.GoString(u)
}