; AX = key pressed
os_read_input:
	mov ah, 11h			; BIOS call to check for key
	int 16h				; Interrupt
	jnz .key_pressed		; Jump if input isn't 0

	hlt
	jmp os_read_input

	.key_pressed:
		mov ah, 10h
		int 16h
		ret

; -------------------------------------------
; IN:
; AX = output address
; BX = max length

keyboard_display_input:
	pusha
	mov di, ax
	mov ax, bx
	mov bx,20 

	.loop:
		jmp .check_key_pressed

		jmp .loop

	.check_key_pressed:
		call os_read_input

		cmp al, 08h
		je .backspace

		cmp al, 0Dh
		je .enter_key

		cmp al, 1Bh
		je .esc_key

		dec bx

		cmp bx, 0
		jae .print_current_input ; Echo the user input back

		jmp .check_key_pressed

	.esc_key:
		call power_reboot

	.enter_key:
		mov al, 0
		stosb
		popa
		ret ; Return to the parent function (whatever that may be)

	.backspace:
		cmp bx, 20						; Cannot backspace if the cursor is at the start
		jb .move_cursor_back			; then .move_cursor_back
		jmp .loop						; Else .loop

	.move_cursor_back:
		mov ah, 0Eh

		mov al, 08h
		int 10h
		mov al, 20h
		int 10h
		mov al, 08h
		int 10h

		inc bx
		dec di
		jmp .loop

	.print_current_input: ; Echo back that character and return the key inputing
		stosb
		mov ah, 0Eh
		int 10h
		jmp .check_key_pressed

keyboard_get_cursor_pos: ;TODO
	ret
keyboard_wait_for_key:   ;TODO
	ret
keyboard_show_cursor:
	ret
keyboard_hide_cursor:
	ret
keyboard_move_cursor:
	ret
keyboard_check_key:
	ret