// Copyright (c) 2021-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <node/caches.h>

#include <common/args.h>
#include <index/txindex.h>
#include <kernel/caches.h>
#include <txdb.h>

#include <algorithm>
#include <string>

namespace node {
CacheSizes CalculateCacheSizes(const ArgsManager& args, size_t n_indexes)
{
    int64_t nTotalCache = (args.GetIntArg("-dbcache", nDefaultDbCache) << 20);
    nTotalCache = std::max(nTotalCache, nMinDbCache << 20); // total cache cannot be less than nMinDbCache
    IndexCacheSizes sizes;
    sizes.tx_index = std::min(nTotalCache / 8, args.GetBoolArg("-txindex", DEFAULT_TXINDEX) ? nMaxTxIndexCache << 20 : 0);
    nTotalCache -= sizes.tx_index;
    if (n_indexes > 0) {
        int64_t max_cache = std::min(nTotalCache / 8, max_filter_index_cache << 20);
        sizes.filter_index = max_cache / n_indexes;
        nTotalCache -= sizes.filter_index * n_indexes;
    }
    return {sizes, kernel::CacheSizes{static_cast<size_t>(nTotalCache)}};
}
} // namespace node