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
	mov si, user_input
	call os_upper_case ; Make the input uppercase so it's case insensitive

.output_the_user_input:
	call os_print_newline

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

	; Clear screen
	mov si, user_input
	mov di, clear_string
	call os_compare_strings
	cmp cl, 1
	je clear

	; Reboot
	mov si, user_input
	mov di, reboot_string
	call os_compare_strings
	cmp cl, 1
	je power_reboot
	
	; Pong
	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
	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
	call os_read_cli.finish

pong:
	call game_pong
	call os_read_cli.finish

section .data
    welcome_text db 'Welcome to CrawOS, the Cwick, Real and AWsome Operating System\n', 0
	user_input times 20 db 0
	prompt_length db 20
	prompt db 'CrawOS sh> ', 0
	help_string db 'HELP', 0
	clear_string db 'CLEAR', 0
	reboot_string db 'REBOOT', 0
	cat_string db 'CAT', 0
	pong_string db 'PONG', 0
	help_text db 'This is for Cowards:\n"HELP" for this helpful text,\n"CLEAR" to clear the screen,\n"REBOOT" or esc to reboot\n', 0
	command_result_text db 'You typed: ', 0
	unknown_command db 'Error: Unkown Command.. \n', 0