/*
 * Copyright (C) 2025 Johnny Richard <johnny@johnnyrichard.com>
 *
 * SPDX-License-Identifier: LGPL-3.0-or-later
 *
 * This file is part of obe.
 *
 * obe is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * obe 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 Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with obe. If not, see <https://www.gnu.org/licenses/>.
 */
#include <obe/utils.h>
#include <stdio.h>
#include <stdlib.h>

char*
read_file_contents(char* file_path)
{
    FILE* file;
    int file_size;

    file = fopen(file_path, "r");

    if (file == NULL) {
        perror("fopen");
        return NULL;
    }

    if (fseek(file, 0, SEEK_END) == -1) {
        perror("fseek SEEK_END");
        fclose(file);
        return NULL;
    }

    if ((file_size = ftell(file)) == -1) {
        perror("ftell");
        fclose(file);
        return NULL;
    }

    if (fseek(file, 0, SEEK_SET) == -1) {
        perror("fseek 0 SEEK_SET");
        fclose(file);
        return NULL;
    }

    char* file_content = (char*)calloc(file_size + 1, sizeof(char));
    if (file_content == NULL) {
        fprintf(stderr, "Could not allocate mem for file_content\n");
        fclose(file);
        return NULL;
    }

    size_t ret = fread(file_content, sizeof(char), file_size, file);
    if (ret == 0 && ferror(file) != 0) {
        perror("fread");
        free(file_content);
        fclose(file);
        return NULL;
    }

    fclose(file);

    return file_content;
}