// Copyright (c) 2024 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or https://www.opensource.org/licenses/mit-license.php.

#include <bitcoin-build-config.h> // IWYU pragma: keep

#include <bench/bench.h>
#include <interfaces/chain.h>
#include <node/context.h>
#include <test/util/mining.h>
#include <test/util/setup_common.h>
#include <wallet/test/util.h>
#include <wallet/context.h>
#include <wallet/receive.h>
#include <wallet/wallet.h>

#include <optional>

#if defined(USE_BDB) && defined(USE_SQLITE) // only enable benchmark when bdb and sqlite are enabled

namespace wallet{

static void WalletMigration(benchmark::Bench& bench)
{
    const auto test_setup = MakeNoLogFileContext<TestingSetup>();

    WalletContext context;
    context.args = &test_setup->m_args;
    context.chain = test_setup->m_node.chain.get();

    // Number of imported watch only addresses
    int NUM_WATCH_ONLY_ADDR = 20;

    // Setup legacy wallet
    DatabaseOptions options;
    options.use_unsafe_sync = true;
    options.verify = false;
    DatabaseStatus status;
    bilingual_str error;
    auto database = MakeWalletDatabase(fs::PathToString(test_setup->m_path_root / "legacy"), options, status, error);
    uint64_t create_flags = 0;
    auto wallet = TestLoadWallet(std::move(database), context, create_flags);

    // Add watch-only addresses
    std::vector<CScript> scripts_watch_only;
    for (int w = 0; w < NUM_WATCH_ONLY_ADDR; ++w) {
        CKey key = GenerateRandomKey();
        LOCK(wallet->cs_wallet);
        const CScript& script = scripts_watch_only.emplace_back(GetScriptForDestination(GetDestinationForKey(key.GetPubKey(), OutputType::LEGACY)));
        bool res = wallet->ImportScriptPubKeys(strprintf("watch_%d", w), {script},
                                    /*have_solving_data=*/false, /*apply_label=*/true, /*timestamp=*/1);
        assert(res);
    }

    // Generate transactions and local addresses
    for (int j = 0; j < 400; ++j) {
        CMutableTransaction mtx;
        mtx.vout.emplace_back(COIN, GetScriptForDestination(*Assert(wallet->GetNewDestination(OutputType::BECH32, strprintf("bench_%d", j)))));
        mtx.vout.emplace_back(COIN, GetScriptForDestination(*Assert(wallet->GetNewDestination(OutputType::LEGACY, strprintf("legacy_%d", j)))));
        mtx.vout.emplace_back(COIN, scripts_watch_only.at(j % NUM_WATCH_ONLY_ADDR));
        mtx.vin.resize(2);
        wallet->AddToWallet(MakeTransactionRef(mtx), TxStateInactive{}, /*update_wtx=*/nullptr, /*fFlushOnClose=*/false, /*rescanning_old_block=*/true);
    }

    // Unload so the migration process loads it
    TestUnloadWallet(std::move(wallet));

    bench.epochs(/*numEpochs=*/1).run([&] {
        util::Result<MigrationResult> res = MigrateLegacyToDescriptor(fs::PathToString(test_setup->m_path_root / "legacy"), "", context);
        assert(res);
        assert(res->wallet);
        assert(res->watchonly_wallet);
    });
}

BENCHMARK(WalletMigration, benchmark::PriorityLevel::LOW);

} // namespace wallet

#endif // end USE_SQLITE && USE_BDB