#define _POSIX_C_SOURCE 200809L

#include "mpd_common.h"

#include <limits.h>
#include <string.h>
#include <unistd.h>

static void usage(FILE *file, const char *program) {
  fprintf(file, "Usage: %s [--force] [FILE|-]\n", program);
}

int main(int argc, char **argv) {
  bool force = false;
  const char *path = NULL;
  for (int i = 1; i < argc; i++) {
    if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
      usage(stdout, argv[0]);
      return 0;
    }
    if (strcmp(argv[i], "--force") == 0) {
      force = true;
    } else if ((argv[i][0] == '-' && strcmp(argv[i], "-") != 0) ||
               path != NULL) {
      usage(stderr, argv[0]);
      return 2;
    } else {
      path = argv[i];
    }
  }

  bool close_input;
  FILE *input = mt_open_input(path, &close_input);
  if (input == NULL)
    return 1;
  if (path == NULL && isatty(STDIN_FILENO))
    fprintf(stderr,
            "Reading the new queue from stdin; press Ctrl-D to finish.\n");

  struct mt_strvec tracks;
  mt_strvec_init(&tracks);
  bool ok = mt_read_lines(input, &tracks);
  if (close_input && fclose(input) != 0) {
    perror("mpd: close input");
    ok = false;
  }
  if (!ok) {
    mt_strvec_clear(&tracks);
    return 1;
  }

  struct mpd_connection *connection = mt_connect();
  if (connection == NULL) {
    mt_strvec_clear(&tracks);
    return 1;
  }
  ok = mt_replace_queue(connection, &tracks, UINT_MAX, force);
  if (ok)
    printf("Queue replaced with %zu track%s.\n", tracks.len,
           tracks.len == 1U ? "" : "s");
  mpd_connection_free(connection);
  mt_strvec_clear(&tracks);
  return ok ? 0 : 1;
}