#include "gtest/gtest.h"

#include "leveldb/env.h"
#include "leveldb/db.h"


using namespace leveldb;

constexpr int value_size = 2048;
constexpr int data_size = 128 << 20;

Status OpenDB(std::string dbName, DB **db) {
  Options options;
  options.create_if_missing = true;
  return DB::Open(options, dbName, db);
}

void InsertData(DB *db, uint64_t ttl/* second */, int vsize = 0) {
  WriteOptions writeOptions;
  int key_num = data_size / value_size;
  srand(0);

  for (int i = 0; i < key_num; i++) {
    int key_ = rand() % key_num+1;
    std::string key = std::to_string(key_);
    std::string value(value_size + vsize, 'a');
    db->Put(writeOptions, std::to_string(i+1), value, ttl);
    // db->Put(writeOptions, key, value, ttl);
  }
}

void GetData(DB *db, int size = (1 << 30)) {
  ReadOptions readOptions;
  int key_num = data_size / value_size;
  
  // 点查
  srand(0);
  for (int i = 0; i < 100; i++) {
    int key_ = rand() % key_num+1;
    std::string key = std::to_string(key_);
    std::string value;
    db->Get(readOptions, key, &value);
  }
}

TEST(TestTTL,ReadWithoutTTL) {
  DestroyDB("testdb",Options());
  DB *db;
  if(OpenDB("testdb", &db).ok() == false) {
      std::cerr << "open db failed" << std::endl;
      abort();
  }

  uint64_t ttl1 = 15;
  uint64_t ttl2 = 0;
  uint64_t extra_size = 1;

  InsertData(db, ttl2);
  // sleep(1);
  InsertData(db, ttl1, extra_size); //后一个数据长度变化一下

  //都没过期先找到后插的
  Env::Default()->SleepForMicroseconds(1 * 1000000);
  int key_num = data_size / value_size;
  ReadOptions readOptions;
  Status status;
  srand(0);
  for (int i = 0; i < 100; i++) {
        int key_ = rand() % key_num+1;
        std::string key = std::to_string(key_);
        std::string value;
        status = db->Get(readOptions, key, &value);
        ASSERT_TRUE(status.ok());
        ASSERT_EQ(value.size(), value_size + extra_size);
    }
  //再找到前一次
  Env::Default()->SleepForMicroseconds(ttl1 * 1000000);
  // db->CompactRange(nullptr,nullptr);
  for (int i = 0; i < 100; i++) {
        int key_ = rand() % key_num+1;
        std::string key = std::to_string(key_);
        std::string value;
        status = db->Get(readOptions, key, &value);
        ASSERT_TRUE(status.ok());
        ASSERT_EQ(value.size(), value_size);
    }
  delete db;
}

TEST(TestTTL, ReadTTL) {
  DestroyDB("testdb",Options());
    DB *db;
    if(OpenDB("testdb", &db).ok() == false) {
        std::cerr << "open db failed" << std::endl;
        abort();
    }

    uint64_t ttl = 15;

    InsertData(db, ttl);

    ReadOptions readOptions;
    Status status;
    int key_num = data_size / value_size;
    srand(0);
    for (int i = 0; i < 100; i++) {
        int key_ = rand() % key_num+1;
        std::string key = std::to_string(key_);
        std::string value;
        status = db->Get(readOptions, key, &value);
        std::cout<<key<<" "<<value[0]<<std::endl;
        ASSERT_TRUE(status.ok());
    }

    Env::Default()->SleepForMicroseconds((ttl+1) * 1000000);

    for (int i = 0; i < 100; i++) {
        int key_ = rand() % key_num+1;
        std::string key = std::to_string(key_);
        std::string value;
        status = db->Get(readOptions, key, &value);
        std::cout<<key<<" "<<value<<std::endl;
        ASSERT_FALSE(status.ok());
    }
    delete db;
}

TEST(TestTTL, GetEarlierData) {
  DestroyDB("testdb",Options());
  DB *db;
  if(OpenDB("testdb", &db).ok() == false) {
      std::cerr << "open db failed" << std::endl;
      abort();
  }

  uint64_t ttl1 = 15;
  uint64_t ttl2 = 115;
  uint64_t extra_size = 1;

  InsertData(db, ttl2);
  // sleep(1);
  InsertData(db, ttl1, extra_size); //后一个数据长度变化一下

  //都没过期先找到后插的
  Env::Default()->SleepForMicroseconds(1 * 1000000);
  int key_num = data_size / value_size;
  ReadOptions readOptions;
  Status status;
  srand(0);
  for (int i = 0; i < 100; i++) {
        int key_ = rand() % key_num+1;
        std::string key = std::to_string(key_);
        std::string value;
        status = db->Get(readOptions, key, &value);
        ASSERT_TRUE(status.ok());
        ASSERT_EQ(value.size(), value_size + extra_size);
    }
  //再找到前一次
  Env::Default()->SleepForMicroseconds(ttl1 * 1000000);
  // db->CompactRange(nullptr,nullptr);
  for (int i = 0; i < 100; i++) {
        int key_ = rand() % key_num+1;
        std::string key = std::to_string(key_);
        std::string value;
        status = db->Get(readOptions, key, &value);
        ASSERT_TRUE(status.ok());
        ASSERT_EQ(value.size(), value_size);
    }
  delete db;
}

TEST(TestTTL, CompactionTTL) {
  DestroyDB("testdb",Options());
    DB *db;

    if(OpenDB("testdb", &db).ok() == false) {
        std::cerr << "open db failed" << std::endl;
        abort();
    }

    uint64_t ttl = 10;
    InsertData(db, ttl);

    leveldb::Range ranges[1];
    ranges[0] = leveldb::Range("-", "A");
    uint64_t sizes[1];
    db->GetApproximateSizes(ranges, 1, sizes);
    ASSERT_GT(sizes[0], 0);

    Env::Default()->SleepForMicroseconds((ttl+1) * 1000000);
    // Env::Default()->SleepForMicroseconds(ttl * 1000000);

    db->CompactRange(nullptr, nullptr);

    // leveldb::Range ranges[1];
    ranges[0] = leveldb::Range("-", "A");
    // uint64_t sizes[1];
    db->GetApproximateSizes(ranges, 1, sizes);
    ASSERT_EQ(sizes[0], 0);
    delete db;
}


int main(int argc, char** argv) {
  // All tests currently run with the same read-only file limits.
  testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}