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void cli()
{
    char c = uart_getc();
    uart_sendc(c);

    if (c == '\r' || c == '\n')
    {

        // Null-terminate the buffer
        cli_buffer[buffer_index] = '\0';

        if (buffer_index > 0)
        {
            // Add command to history
            if (history_count < MAX_HISTORY_SIZE)
            {
                strcpy(command_history[history_count], cli_buffer);
                history_count++;
            }
            else
            {
                // Shift history to accommodate new command
                for (int i = 0; i < MAX_HISTORY_SIZE - 1; i++)
                {
                    strcpy(command_history[i], command_history[i + 1]);
                }
                strcpy(command_history[MAX_HISTORY_SIZE - 1], cli_buffer);
            }

            execute_command(cli_buffer);
        }

        // Reset buffer and history index
        buffer_index = 0;
        current_history_index = -1;

        print_os_name();
    }
    else if (c == '\t')
    {
        // Tab key (auto-completion)

        // Find a matching command
        int match_index = -1;
        for (int i = 0; i < num_commands; i++)
        {
            if (strncmp(cli_buffer, commands[i], buffer_index) == 0)
            {
                if (match_index == -1)
                {
                    match_index = i;
                }
                else
                {
                    // Ambiguous match, do nothing
                    match_index = -1;
                    break;
                }
            }
        }

        // Perform auto-completion if a single match found
        if (match_index != -1)
        {
            char *matched_command = commands[match_index];
            int matched_len = strlen(matched_command);

            for (int i = buffer_index; i < matched_len; i++)
            {

                uart_sendc(matched_command[i]);
                cli_buffer[buffer_index++] = matched_command[i];
            }
        }
    }
    else if (c == '_')
    { // '_' key (UP arrow)
        if (current_history_index < history_count - 1)
        {
            current_history_index++;
            strcpy(cli_buffer, command_history[current_history_index]);
            buffer_index = strlen(cli_buffer);
            uart_puts("\033[2K\r"); // Clear current line
            print_os_name();
            uart_puts(cli_buffer);
        }
    }
    else if (c == '+')
    { // '+' key (DOWN arrow)
        if (current_history_index >= 0)
        {
            current_history_index--;
            if (current_history_index >= 0)
            {
                strcpy(cli_buffer, command_history[current_history_index]);
            }
            else
            {
                strcpy(cli_buffer, "");
            }
            buffer_index = strlen(cli_buffer);
            uart_puts("\033[2K\r"); // Clear current line
            print_os_name();
            uart_puts(cli_buffer);
        }
    }
    else if (c == '\b' || c == '\x7F')
    { // Backspace or delete key
        if (buffer_index != 0)
        {
            uart_sendc(' ');  // Clear current character
            uart_sendc('\b'); // Move the censor back by 1
            uart_sendc('\0');
            buffer_index--;
            cli_buffer[buffer_index] = '\0';
        }
    }
    else if (buffer_index < MAX_CMD_SIZE - 1)
    {
        cli_buffer[buffer_index] = c;
        buffer_index++;
    }
}