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#include "cli/cli.h"

#include "mcp/tools/common/common.h"
#include "storage/codec.h"
#include "storage/store.h"

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

int
tiny_cli_export(tiny_store_t *store, const tiny_cli_options_t *options)
{
  size_t index;
  size_t emitted = 0;
  FILE *output = NULL;
  tiny_json_buffer_t item;

  if (!options || !options->export_path)
    {
      fprintf(stderr, "export: path is required\n");
      return 1;
    }

  if (strcmp(options->export_path, "-") == 0)
    {
      output = stdout;
    }
  else
    {
      if (fopen_s(&output, options->export_path, "wb") != 0 || !output)
        {
          fprintf(stderr, "export: unable to open '%s'\n", options->export_path);
          return 1;
        }
    }

  if (fprintf(output, "{\"type\":\"tiny-convmem-manifest\",\"format_version\":2}\n") < 0)
    {
      fprintf(stderr, "export: failed to write manifest\n");
      if (output != stdout)
        {
          fclose(output);
        }
      return 1;
    }

  for (index = 0; index < tiny_store_entry_count(store); ++index)
    {
      const tiny_store_entry_t *entry = tiny_store_entry(store, index);
      int write_failed;
      if (!entry)
        {
          continue;
        }
      if (entry->deleted && !options->include_deleted)
        {
          continue;
        }
      if (options->session_id && options->session_id[0]
          && strcmp(entry->message.session_id, options->session_id) != 0)
        {
          continue;
        }

      tiny_json_init(&item);
      if (entry->deleted)
        {
          tiny_json_raw(&item, "{\"type\":\"DEL\",\"message_id\":");
          tiny_json_string(&item, entry->message.message_id);
          tiny_json_raw(&item, "}");
        }
      else
        {
          tiny_mcp_tool_append_message(&item, &entry->message);
        }

      write_failed = item.failed || fprintf(output, "%s\n", item.data ? item.data : "") < 0;
      tiny_json_free(&item);
      if (write_failed)
        {
          fprintf(stderr, "export: failed to write record\n");
          if (output != stdout)
            {
              fclose(output);
            }
          return 1;
        }
      emitted++;
    }

  if (output != stdout)
    {
      fclose(output);
    }
  (void)emitted;
  return 0;
}