#include "leveldb/db.h"
#include "leveldb/options.h"
#include "util/random.h"
#include <bits/stdc++.h>
#include <string>

using namespace std;
using namespace leveldb;

int main() {
    DB* db = nullptr;
    Options op;
    op.create_if_missing = true;
    DestroyDB("testdb_kv", Options());
    Status status = DB::Open(op, "testdb_kv", &db);
    // assert(status.ok());

    // string key = "leveldb",value = to_string(0);
    // string res;
    // for(int i = 0; i < 5; i++) {
    //     db->Put(WriteOptions(),key,to_string(i));
    // }
    // db->Put(WriteOptions(),key+key,to_string(0));
    // db->Put(WriteOptions(),key+key,to_string(1));
    // sleep(1);
    // auto snapshot = db->GetSnapshot();
    // auto readopts = ReadOptions();
    // readopts.snapshot = snapshot;
    // db->Put(WriteOptions(),key,to_string(10));
    // db->CompactRange(nullptr,nullptr);
    // db->Get(readopts,key,&res);
    // cout<<"with snapshot:"<<res<<endl;
    // res.clear();
    // db->Get(ReadOptions(),key,&res);
    // cout<<"without snapshot:"<<res<<endl;


    // string value = "leveldb",key = "abc";
    // db->Delete(WriteOptions(),key);
    // db->Put(WriteOptions(),key,value);
    // const Snapshot *snapshot = db->GetSnapshot();
    // ReadOptions read_op = ReadOptions();
    // read_op.snapshot = snapshot;
    // string result;
    // db->Get(read_op,key,&result);
    // cout<<result<<endl;
    // db->Delete(WriteOptions(),key);
    // result.clear();
    // db->Get(read_op,key,&result);
    // cout<<"with snapshot:"<<result<<endl;
    // result.clear();
    // db->Get(ReadOptions(),key,&result);
    // cout<<"without snapshot:"<<result<<endl;
    // db->ReleaseSnapshot(snapshot);

    string key,value = "leveldb";
    key.resize(1000,'a');
    // value.resize(10,'b');
    value += "index";
    Random ran(0);
    for(int i = 0; i < 100000; i++) {
        for(int j = 0; j < 20; j++)  {
            int rand = ran.Uniform(200 * 10);
            string tk = key + std::to_string(rand);
            string tv = value + std::to_string(rand) + "_" + std::to_string(i);
            db->Put(WriteOptions(),tk,tv);
        }
        if(i && i%1000 ==0) {
            std::cout << "iteration:" << i << std::endl;
        }
    }
    std::string res;
    for(int i = 0; i < 10; i++) {
        db->Get(ReadOptions(), key + std::to_string(i), &res);
        std::cout << i << " " << res << std::endl;
    }
    delete db;
    // DB::Open(op,"testdb",&db);
    // key = "abc", value = "";
    // db->Get(ReadOptions(),key,&value);
    // cout<<value;
    // // DestroyDB("testdb",op);
    // delete db;

    return 0;
}