// vim: shiftwidth=4 tabstop=4 noexpandtab

package main

import (
	"log"

	"github.com/go-gl/glfw/v3.3/glfw"
)

const (
	WINDOW_WIDTH  = 500
	WINDOW_HEIGHT = 500
	WINDOW_TITLE = "stlscope"
)

type App struct {
	window *glfw.Window
}

func newApp() App {

	var app App = App{}
	var err error

	log.Println("GLFW init")
	if err := glfw.Init(); err != nil {
		panic(err)
	}

	glfw.WindowHint(glfw.Resizable, glfw.False)
	glfw.WindowHint(glfw.ContextVersionMajor, 4)
	glfw.WindowHint(glfw.ContextVersionMinor, 6)
	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
	glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
	glfw.WindowHint(glfw.Samples, 16)  // anti-aliasing

	log.Println("Creating Window")
	app.window, err = glfw.CreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, WINDOW_TITLE, nil, nil)
	if err != nil {
		panic(err)
	}
	app.window.MakeContextCurrent()

	return app
}

func (application App) handle() {
	glfw.PollEvents()
	application.window.SwapBuffers()
}

func (application App) terminate() {
	glfw.Terminate()
}