os_start_cli:
	pusha
	
	call os_print_newline

	mov si, prompt
	call os_print_string

	mov ax, 20

	mov di, user_input

	call os_display_input


; ------------------------------------------------

os_read_cli:
	pusha

.output_the_user_input:
	call os_print_newline

.check_matches:			; Check if the user input matches any internal commands
	mov si, user_input
	mov di, help_string
	call os_compare_strings
	cmp cl, 1
	je help

	mov si, user_input
	mov di, clear_string
	call os_compare_strings
	cmp cl, 1
	je clear
	
	mov si, user_input
	mov di, pong_string
	call os_compare_strings
	cmp cl, 1
	je pong

	jmp .unkown

.unkown:
	mov si, unknown_command
	call os_print_string
	mov si, user_input
	call os_print_string_nl
	jmp .finish

.finish:
	popa
	call os_start_cli

clear:
	call os_set_text_mode
	call os_read_cli.finish

help:
	mov si, help_text
	call os_print_string_nl
	call os_read_cli.finish

pong:
	call game_pong
	call os_read_cli.finish

section .data
	user_input times 20 db 0
	prompt_length db 20
	prompt db 'CrawOS: ', 0
	help_string db 'HELP', 0
	clear_string db 'CLEAR', 0
	pong_string db 'PONG', 0
	help_text db 'This is CrawOS, type "HELP" for help, "CLEAR" to clear the screen', 0
	command_result_text db 'You typed: ', 0
	unknown_command db 'Error: Unkown Command.. ', 0