#pragma once

#include "../backing.h"
#include "../range.h"

#include "file.h"

AL_IGNORE_WARNING("-Wunused-function")

static off_t file_backing_get_size_if_known(struct cch_backing *backing)
{
    struct cch_backing_file *file = (struct cch_backing_file *)backing;
    nn_mutex_lock(&file->mutex);
    off_t size = file->backing.size;
    nn_mutex_unlock(&file->mutex);
    return size;
}

static void file_backing_finalize(struct cch_backing *backing)
{
    struct cch_backing_file *file = (struct cch_backing_file *)backing;
    nn_mutex_lock(&file->mutex);
    file->backing.size = file->file.size;
    nn_mutex_unlock(&file->mutex);
}

static bool file_open_internal(struct cch_backing_file *file, str *path, size_t size)
{
    s32 flags = (size != 0) ? NNWT_FILE_CREATE : NNWT_FILE_READONLY;
    if (!nn_file_open(&file->file, path, flags)) return false;
    size_t filesize = file->file.size;
    if (!size) {
        file->backing.size = filesize;
        cch_backing_fill_range(&file->backing, 0, filesize);
    } else if (filesize < size) {
        nn_file_truncate(&file->file, size);
    }
    return true;
}

AL_IGNORE_WARNING_END