#if 0
/*─────────────────────────────────────────────────────────────────╗
│ To the extent possible under law, Justine Tunney has waived      │
│ all copyright and related or neighboring rights to this file,    │
│ as it is written in the following disclaimers:                   │
│   • http://unlicense.org/                                        │
│   • http://creativecommons.org/publicdomain/zero/1.0/            │
╚─────────────────────────────────────────────────────────────────*/
#endif
#include "libc/calls/calls.h"
#include "libc/calls/struct/stat.h"
#include "libc/errno.h"
#include "libc/fmt/conv.h"
#include "libc/fmt/fmt.h"
#include "libc/log/check.h"
#include "libc/log/log.h"
#include "libc/mem/gc.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/s.h"
#include "libc/x/xiso8601.h"

/**
 * @fileoverview File metadata viewer.
 *
 * This demonstrates the more powerful aspects of the printf() DSL.
 */

bool numeric;

const char *DescribeFileType(unsigned mode) {
  switch (mode & S_IFMT) {
    case S_IFIFO:
      return "S_IFIFO"; /* pipe */
    case S_IFCHR:
      return "S_IFCHR"; /* character device */
    case S_IFDIR:
      return "S_IFDIR"; /* directory */
    case S_IFBLK:
      return "S_IFBLK"; /* block device */
    case S_IFREG:
      return "S_IFREG"; /* regular file */
    case S_IFLNK:
      return "S_IFLNK"; /* symbolic link */
    case S_IFSOCK:
      return "S_IFSOCK"; /* socket */
    default:
      return "wut";
  }
}

void PrintFileMetadata(const char *pathname, struct stat *st) {
  int fd;
  printf("\n%s:", pathname);
  if (numeric) {
    fd = atoi(pathname);
    CHECK_NE(-1, fstat(fd, st), "fd=%d", fd);
  } else {
    CHECK_NE(-1, stat(pathname, st), "pathname=%s", pathname);
  }
  printf("\n"
         "%-32s%,ld\n"
         "%-32s%,ld\n"
         "%-32s%#lx\n"
         "%-32s%#lx\n"
         "%-32s%ld\n"
         "%-32s%#o (%s)\n"
         "%-32s%d\n"
         "%-32s%d\n"
         "%-32s%d\n"
         "%-32s%d\n"
         "%-32s%ld\n"
         "%-32s%ld\n"
         "%-32s%s\n"
         "%-32s%s\n"
         "%-32s%s\n"
         "%-32s%s\n",
         "bytes in file", st->st_size, "physical bytes", st->st_blocks * 512,
         "device id w/ file", st->st_dev, "inode", st->st_ino,
         "hard link count", st->st_nlink, "mode / permissions", st->st_mode,
         DescribeFileType(st->st_mode), "owner id", st->st_uid, "group id",
         st->st_gid, "flags", st->st_flags, "gen", st->st_gen,
         "device id (if special)", st->st_rdev, "block size", st->st_blksize,
         "access time", _gc(xiso8601(&st->st_atim)), "modified time",
         _gc(xiso8601(&st->st_mtim)), "c[omplicated]time",
         _gc(xiso8601(&st->st_ctim)), "birthtime",
         _gc(xiso8601(&st->st_birthtim)));
}

int main(int argc, char *argv[]) {
  size_t i;
  struct stat st;
  for (i = 1; i < argc; ++i) {
    if (!strcmp(argv[i], "-n")) {
      numeric = true;
    } else {
      PrintFileMetadata(argv[i], &st);
    }
  }
  return 0;
}