package ncurses

import (
	"unsafe"

	"github.com/ebitengine/purego"
)

var ncurses uintptr = 0
func ncursesFunction[T any](name string) T {
  if ncurses == 0 {
    var err error
    ncurses, err = purego.Dlopen(LIBRARY_PATH, purego.RTLD_GLOBAL | purego.RTLD_LAZY)
    if err != nil {
      panic(err)
    }
  }

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

func ncursesSymbol[T any](name string) *T {
  if ncurses == 0 {
    var err error
    ncurses, err = purego.Dlopen(LIBRARY_PATH, purego.RTLD_GLOBAL | purego.RTLD_LAZY)
    if err != nil {
      panic(err)
    }
  }

  sym, err := purego.Dlsym(ncurses, name)
  if err != nil {
    panic(err)
  }

  return (*T)(unsafe.Pointer(sym))
}

type Window uintptr

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

var WGetCh = ncursesFunction[winFP]("wgetch")

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

type newwinFP func(nlines, ncols, begin_y, begin_x 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")

var WClear = ncursesFunction[winFP]("wclear")
var WErase = ncursesFunction[winFP]("werase")

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

type mvwaddchFP func(window Window, y, x int, char uint32) int
var MvWAddCh = ncursesFunction[mvwaddchFP]("mvwaddch")

type waddchFP func(window Window, char uint32) int
var WAddCh = ncursesFunction[waddchFP]("waddch")

type init_colorFP func(color, r, g, b int16) int
var InitColor = ncursesFunction[init_colorFP]("init_color")

type init_pairFP func(pair, fg, bg int16) int
var InitPair = ncursesFunction[init_pairFP]("init_pair")

var StartColor = ncursesFunction[voidFP]("start_color")

type checkFP func() bool
var HasColors = ncursesFunction[checkFP]("has_colors")

type setflagFP func(window Window, bf bool) int
var ClearOK = ncursesFunction[setflagFP]("clearok")
var IdlOK = ncursesFunction[setflagFP]("idlok")
var ScrollOk = ncursesFunction[setflagFP]("scrollok")
var NoDelay = ncursesFunction[setflagFP]("nodelay")

type idcokFP func(window Window, bf bool)
var IdcOK = ncursesFunction[idcokFP]("idcok")

type wscrlFP func(window Window, n int) int
var WScrl = ncursesFunction[wscrlFP]("wscrl")

type colorpairFP func(pair int) uint32
var COLOR_PAIR = ncursesFunction[colorpairFP]("COLOR_PAIR")

type wuintFP func(Window, uint32) uint32
var WAttrOn = ncursesFunction[wuintFP]("wattron")
var WAttrOff = ncursesFunction[wuintFP]("wattroff")
var WBkgd = ncursesFunction[wuintFP]("wbkgd")

type wyxFP func(window Window, y, x int) int
var WMove = ncursesFunction[wyxFP]("wmove")
var WResize = ncursesFunction[wyxFP]("wresize")
var MvWin = ncursesFunction[wyxFP]("mvwin")

var StdScr = ncursesSymbol[Window]("stdscr")
var CurScr = ncursesSymbol[Window]("curscr")

type curssetFP func(visibility int) int
var CursSet = ncursesFunction[curssetFP]("curs_set")