// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you under the Apache License, Version 2.0 (the

// "License"); you may not use this file except in compliance

// with the License.  You may obtain a copy of the License at

//

//   http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing,

// software distributed under the License is distributed on an

// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

// KIND, either express or implied.  See the License for the

// specific language governing permissions and limitations

// under the License.

#include "runtime/query_cache/query_cache.h"

namespace doris {

std::vector<int>* QueryCacheHandle::get_cache_slot_orders() {

    DCHECK(_handle);

    auto result_ptr = reinterpret_cast<LRUHandle*>(_handle)->value;

    return &((QueryCache::CacheValue*)(result_ptr))->slot_orders;

}

CacheResult* QueryCacheHandle::get_cache_result() {

    DCHECK(_handle);

    auto result_ptr = reinterpret_cast<LRUHandle*>(_handle)->value;

    return &((QueryCache::CacheValue*)(result_ptr))->result;

}

int64_t QueryCacheHandle::get_cache_version() {

    DCHECK(_handle);

    auto result_ptr = reinterpret_cast<LRUHandle*>(_handle)->value;

    return ((QueryCache::CacheValue*)(result_ptr))->version;

}

void QueryCache::insert(const CacheKey& key, int64_t version, CacheResult& res,

                        const std::vector<int>& slot_orders, int64_t cache_size) {

    SCOPED_SWITCH_THREAD_MEM_TRACKER_LIMITER(ExecEnv::GetInstance()->query_cache_mem_tracker());

    CacheResult cache_result;

    for (auto& block_data : res) {

        cache_result.emplace_back(Block::create_unique())->swap(block_data->clone_empty());

        (void)MutableBlock(cache_result.back().get()).merge(*block_data);

    }

    auto cache_value_ptr =

            std::make_unique<QueryCache::CacheValue>(version, std::move(cache_result), slot_orders);

    QueryCacheHandle(this, LRUCachePolicy::insert(key, (void*)cache_value_ptr.release(), cache_size,

                                                  cache_size, CachePriority::NORMAL));

}

bool QueryCache::lookup(const CacheKey& key, int64_t version, doris::QueryCacheHandle* handle) {

    SCOPED_SWITCH_THREAD_MEM_TRACKER_LIMITER(ExecEnv::GetInstance()->query_cache_mem_tracker());

    auto* lru_handle = LRUCachePolicy::lookup(key);

    if (lru_handle) {

        QueryCacheHandle tmp_handle(this, lru_handle);

        if (tmp_handle.get_cache_version() == version) {

            *handle = std::move(tmp_handle);

            return true;

        }

    }

    return false;

}

} // namespace doris