/*
 * 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 "defs.h"
#include <libweb/http.h>
#include <dynstr.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>

int ep_style(const struct http_payload *const p, struct http_response *const r,
    void *const user)
{
    int ret = -1;
    FILE *f = NULL;
    const struct cfg *const cfg = user;
    const char *const dir = cfg->dir;
    struct dynstr d;
    struct stat sb;

    dynstr_init(&d);

    if (!dir)
    {
        fprintf(stderr, "%s: auth_dir failed\n", __func__);
        goto end;
    }
    else if (dynstr_append(&d, "%s/" STYLE_PATH, dir))
    {
        fprintf(stderr, "%s: dynstr_append failed\n", __func__);
        goto end;
    }
    else if (stat(d.str, &sb))
    {
        fprintf(stderr, "%s: stat(2) %s: %s\n", __func__, d.str,
            strerror(errno));
        goto end;
    }
    else if (!(f = fopen(d.str, "rb")))
    {
        fprintf(stderr, "%s: fopen(3) %s: %s\n",
            __func__, dir, strerror(errno));
        goto end;
    }

    *r = (const struct http_response)
    {
        .status = HTTP_STATUS_OK,
        .f = f,
        .n = sb.st_size
    };

    if (http_response_add_header(r, "Content-Type", "text/css"))
    {
        fprintf(stderr, "%s: http_response_add_header failed\n", __func__);
        goto end;
    }

    ret = 0;

end:

    if (ret && f && fclose(f))
        fprintf(stderr, "%s: fclose(3) %s: %s\n",
            __func__, dir, strerror(errno));

    dynstr_free(&d);
    return ret;
}