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#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "mcp/server.h"
#include "storage/store.h"
#include "sys/system.h"

#include "base/allocator.h"

static void
usage(FILE *stream)
{
  fprintf(stream, "Usage: tiny-convmem-mcp --data-dir <path>\n");
}

static int
run(const tiny_sys_arguments_t *arguments)
{
  char *absolute;
  tiny_store_t *store = NULL;
  tiny_store_status_t status;
  int result;
  if (arguments->count == 2 && strcmp(arguments->values[1], "--help") == 0)
    {
      usage(stdout);
      return 0;
    }
  if (arguments->count != 3 || strcmp(arguments->values[1], "--data-dir") != 0
      || arguments->values[2][0] == '\0')
    {
      usage(stderr);
      return 2;
    }
  absolute = tiny_sys_path_absolute(arguments->values[2]);
  if (absolute == NULL)
    {
      fprintf(stderr, "unable to resolve --data-dir\n");
      return 2;
    }
  status = tiny_store_open(&store, absolute);
  free(absolute);
  if (status != TINY_STORE_OK)
    {
      fprintf(stderr, "unable to open conversation store: %s\n", tiny_store_status_name(status));
      return status == TINY_STORE_BUSY ? 3 : 1;
    }
  result = tiny_convmem_server_run(stdin, stdout, store);
  tiny_store_close(store);
  if (result != 0)
    {
      fprintf(stderr, "tiny-convmem-mcp stopped with error code %d\n", result);
    }
  return result;
}

int
main(int argc, char **argv)
{
  tiny_sys_arguments_t arguments;
  int result;
  if (!tiny_sys_arguments_init(&arguments, argc, argv))
    {
      fprintf(stderr, "unable to read process arguments\n");
      return 2;
    }
  result = run(&arguments);
  tiny_sys_arguments_free(&arguments);
  return result;
}