/*
 * nanobbs, a tiny forums software.
 * Copyright (C) 2025-2026  Xavier Del Campo Romero
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#define _POSIX_C_SOURCE 200809L

#include "endpoints.h"
#include "auth.h"
#include "form.h"
#include <libweb/http.h>
#include <stdio.h>

static const char errmsg[] = "Invalid or missing cookie";

static int setup(const struct http_payload *const p,
    struct http_response *const r, void *const user, sqlite3 *const db,
    const struct auth_user *const u)
{
    static const char date[] = "Thu, 1 Jan 1970 00:00:00 GMT";
    int ret = -1, error;
    struct dynstr d;

    dynstr_init(&d);

    if (!u)
    {
        ret = form_unauthorized("Authentication required", r);
        goto end;
    }
    else if (dynstr_append(&d, "%s=expired; Expires=%s", u->username, date))
    {
        fprintf(stderr, "%s: dynstr_append failed\n", __func__);
        goto end;
    }

    *r = (const struct http_response){.status = HTTP_STATUS_SEE_OTHER};

    if (http_response_add_header(r, "Set-Cookie", d.str)
        || http_response_add_header(r, "Location", "/"))
    {
        fprintf(stderr, "%s: http_response_add_header failed\n", __func__);
        goto end;
    }

    ret = 0;

end:

    if ((error = sqlite3_close(db)) != SQLITE_OK)
    {
        fprintf(stderr, "%s: sqlite3_close: %s\n", __func__,
            sqlite3_errstr(error));
        ret = -1;
    }

    dynstr_free(&d);
    return ret;
}

int ep_logout(const struct http_payload *const p,
    struct http_response *const r, void *const user)
{
    int ret = auth_validate(p, r, user, setup);

    if (ret < 0)
        fprintf(stderr, "%s: auth_validate failed\n", __func__);
    else if (ret)
        ret = form_badreq(errmsg, r);

    return ret;
}