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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once

#include <vespa/searchcore/proton/server/ibucketstatecalculator.h>
#include <vespa/document/bucket/bucketidlist.h>
#include <vespa/document/bucket/bucket.h>
#include <set>
#include <memory>

namespace proton::test {

using BucketIdVector = document::bucket::BucketIdList;

using BucketIdSet = std::set<document::BucketId>;

class BucketStateCalculator : public IBucketStateCalculator
{
private:
    BucketIdSet            _ready;
    mutable BucketIdVector _asked;
    bool                   _clusterUp;
    bool                   _nodeUp;
    bool                   _nodeRetired;
    bool                   _nodeMaintenance;

public:
    using SP = std::shared_ptr<BucketStateCalculator>;
    BucketStateCalculator() noexcept :
        _ready(),
        _asked(),
        _clusterUp(true),
        _nodeUp(true),
        _nodeRetired(false),
        _nodeMaintenance(false)
    {
    }
    BucketStateCalculator(BucketStateCalculator &&) noexcept = default;
    BucketStateCalculator & operator =(BucketStateCalculator &&) noexcept = default;
    ~BucketStateCalculator() override;
    BucketStateCalculator &addReady(const document::BucketId &bucket) {
        _ready.insert(bucket);
        return *this;
    }
    BucketStateCalculator &remReady(const document::BucketId &bucket) {
        _ready.erase(bucket);
        return *this;
    }
    BucketStateCalculator &setClusterUp(bool value) noexcept {
        _clusterUp = value;
        return *this;
    }

    BucketStateCalculator & setNodeUp(bool value) noexcept {
        _nodeUp = value;
        return *this;
    }

    BucketStateCalculator& setNodeRetired(bool retired) noexcept {
        _nodeRetired = retired;
        return *this;
    }

    BucketStateCalculator& setNodeMaintenance(bool maintenance) noexcept {
        _nodeMaintenance = maintenance;
        if (maintenance) {
            _nodeUp = false;
            _nodeRetired = false;
        }
        return *this;
    }

    const BucketIdVector &asked() const noexcept { return _asked; }
    void resetAsked() { _asked.clear(); }

    // Implements IBucketStateCalculator
    vespalib::Trinary shouldBeReady(const document::Bucket &bucket) const override {
        _asked.push_back(bucket.getBucketId());
        return (_ready.count(bucket.getBucketId()) == 1) ? vespalib::Trinary::True : vespalib::Trinary::False;
    }

    bool clusterUp() const override { return _clusterUp; }
    bool nodeUp() const override { return _nodeUp; }
    bool nodeRetired() const override { return _nodeRetired; }
    bool nodeInitializing() const override { return false; }
    bool nodeMaintenance() const noexcept override { return _nodeMaintenance; }
};

}