/* Aplwc - A Programming Language With Constraints
 *
 * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
 *
 * This file is part of aplwc.
 *
 * Aplwc is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Aplwc is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with aplwc.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <stdlib.h>
#include "readline.h"

static struct aplwc *aplwc;
static char **completions;
static int completion_index;

static char **complete(const char *, int, int);
static char *get_completion(const char *, int);

void
init_readline(struct aplwc *_aplwc)
{
	aplwc = _aplwc;
	rl_readline_name = "aplwc";
	rl_attempted_completion_function = complete;	
}

static char **
complete(const char *text, int start, int end)
{
	rl_attempted_completion_over = 1;
	completions = aplwc_autocomplete(aplwc, rl_line_buffer, start, end);
	char **result = NULL;
	if(completions)
		result = rl_completion_matches(text, get_completion);
	free(completions);
	return result;
}

static char *
get_completion(const char *text, int state)
{
	return completions[state];
}