package ncurses

import (
	"sync/atomic"

	"github.com/ebitengine/purego"
)

var ncurses atomic.Value

func ncursesFunction[T any](name string) T {
  if ncurses.Load() == nil {
    lib, err := purego.Dlopen(LIBRARY_PATH, purego.RTLD_GLOBAL | purego.RTLD_LAZY)
    if err != nil {
      panic(err)
    }
    ncurses.CompareAndSwap(nil, lib)
  }

  var tmp = new(T)
  purego.RegisterLibFunc(tmp, ncurses.Load().(uintptr), name)
  return *tmp
}

type Window uintptr

type voidFP func() int
type winFP func(window Window) int

type initscrFP func() Window
var InitScr = ncursesFunction[initscrFP]("initscr")
var EndWin = ncursesFunction[voidFP]("endwin")

type newwinFP func(nlines, ncols, begin_x, begin_y int) Window
var NewWin = ncursesFunction[newwinFP]("newwin")
var DelWin = ncursesFunction[winFP]("delwin")
type dupwinFP func(window Window) Window
var DupWin = ncursesFunction[dupwinFP]("dupwin")

var Refresh = ncursesFunction[voidFP]("refresh")
var WRefresh = ncursesFunction[winFP]("wrefresh")
var WNOutRefresh = ncursesFunction[winFP]("wnoutrefresh")
var DoUpdate = ncursesFunction[voidFP]("doupdate")

type waddstrFP func(window Window, str string) int
var WAddStr = ncursesFunction[waddstrFP]("waddstr")

type waddnstrFP func(window Window, str string, n int) int
var WAddNStr = ncursesFunction[waddstrFP]("waddnstr")

var GetMaxY = ncursesFunction[winFP]("getmaxy")
var GetMaxX = ncursesFunction[winFP]("getmaxx")

type mvwaddstrFP func(window Window, x, y int, str string) int
var MvWAddStr = ncursesFunction[mvwaddstrFP]("mvwaddstr")