#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdlib.h>
#include "lmdb.h"
#include <unistd.h>

typedef struct param param;
typedef long long int i64;
typedef unsigned int u32;

struct param
{
	MDB_dbi pagesdb;
	// MDB_dbi testdb;
	MDB_env *env;
	MDB_txn *wtxn;
	MDB_cursor *cursorPages;
};


static MDB_txn* open_wtxn(param *data)
{
	if (mdb_txn_begin(data->env, NULL, 0, &data->wtxn) != MDB_SUCCESS)
		return NULL;
	if (mdb_dbi_open(data->wtxn, "pages", MDB_CREATE | MDB_DUPSORT, &data->pagesdb) != MDB_SUCCESS)
		return NULL;
	if (mdb_cursor_open(data->wtxn, data->pagesdb, &data->cursorPages) != MDB_SUCCESS)
		return NULL;

  return data->wtxn;
}


int main(int argc, char* argv[])
{
	param data;
	// FILE *f;
	char buf1[5000];
	char buf2[5000];
	MDB_val k = {12,buf1};
	MDB_val v = {4063,buf2};
	int rc;

	memset(&data, 0, sizeof(param));

	unlink("lmdbdb");
	unlink("lmdbdb-lock");

	if (mdb_env_create(&data.env) != MDB_SUCCESS)
		return 0;

	if (mdb_env_set_maxdbs(data.env,5) != MDB_SUCCESS)
		return 0;

	if (mdb_env_open(data.env, "lmdbdb", MDB_NOSUBDIR, 0664) != MDB_SUCCESS)
		return 0;

	if (open_wtxn(&data) == NULL)
		return 0;

	if (mdb_txn_commit(data.wtxn) != MDB_SUCCESS)
		return 0;

	if (open_wtxn(&data) == NULL)
		return 0;

	printf("maxkeysize=%d\n",mdb_env_get_maxkeysize(data.env));
	printf("writing keysize=%ld, datasize=%ld\n",k.mv_size, v.mv_size);
	if ((rc = mdb_cursor_put(data.cursorPages,&k,&v,0)) != MDB_SUCCESS)
	{
		printf("Cursor put eror=%d\n",rc);
	}


	mdb_txn_commit(data.wtxn);
	mdb_env_close(data.env);
 	return 0;
}