#ifndef FWCore_ParameterSet_Entry_h
#define FWCore_ParameterSet_Entry_h

// ----------------------------------------------------------------------
// interface to Entry and related types
//
//
// The functions here are expected to go away.  The exception
// processing is not ideal and is not a good model to follow.
//
// ----------------------------------------------------------------------

#include <string>
#include <vector>
#include <iosfwd>

#include "FWCore/Utilities/interface/FileInPath.h"
#include "FWCore/Utilities/interface/InputTag.h"
#include "FWCore/Utilities/interface/ESInputTag.h"
//@@ not needed, but there might be trouble if we take it out
#include "DataFormats/Provenance/interface/EventRange.h"
#include "DataFormats/Provenance/interface/LuminosityBlockID.h"
#include "DataFormats/Provenance/interface/LuminosityBlockRange.h"
#include "DataFormats/Provenance/interface/EventID.h"

// ----------------------------------------------------------------------
// contents

namespace cms {
  class Digest;
}

namespace edm {
  // forward declarations:
  class ParameterSet;

  // ----------------------------------------------------------------------
  // Entry

  class Entry {
  public:
    // Bool
    Entry(std::string const& name, bool val, bool is_tracked);
    bool getBool() const;

    // Int32
    Entry(std::string const& name, int val, bool is_tracked);
    int getInt32() const;

    // vInt32
    Entry(std::string const& name, std::vector<int> const& val, bool is_tracked);
    std::vector<int> getVInt32() const;

    // Uint32
    Entry(std::string const& name, unsigned val, bool is_tracked);
    unsigned getUInt32() const;

    // vUint32
    Entry(std::string const& name, std::vector<unsigned> const& val, bool is_tracked);
    std::vector<unsigned> getVUInt32() const;

    // Int64
    Entry(std::string const& name, long long val, bool is_tracked);
    long long getInt64() const;

    // vInt64
    Entry(std::string const& name, std::vector<long long> const& val, bool is_tracked);
    std::vector<long long> getVInt64() const;

    // Uint64
    Entry(std::string const& name, unsigned long long val, bool is_tracked);
    unsigned long long getUInt64() const;

    // vUint64
    Entry(std::string const& name, std::vector<unsigned long long> const& val, bool is_tracked);
    std::vector<unsigned long long> getVUInt64() const;

    // Double
    Entry(std::string const& name, double val, bool is_tracked);
    double getDouble() const;

    // vDouble
    Entry(std::string const& name, std::vector<double> const& val, bool is_tracked);
    std::vector<double> getVDouble() const;

    // String
    Entry(std::string const& name, std::string const& val, bool is_tracked);
    std::string getString() const;

    // vString
    Entry(std::string const& name, std::vector<std::string> const& val, bool is_tracked);
    std::vector<std::string> getVString() const;

    // FileInPath
    Entry(std::string const& name, FileInPath const& val, bool is_tracked);
    FileInPath getFileInPath() const;

    // InputTag
    Entry(std::string const& name, InputTag const& tag, bool is_tracked);
    InputTag getInputTag() const;

    // InputTag
    Entry(std::string const& name, std::vector<InputTag> const& vtag, bool is_tracked);
    std::vector<InputTag> getVInputTag() const;

    // ESInputTag
    Entry(std::string const& name, ESInputTag const& tag, bool is_tracked);
    ESInputTag getESInputTag() const;

    // VESInputTag
    Entry(std::string const& name, std::vector<ESInputTag> const& vtag, bool is_tracked);
    std::vector<ESInputTag> getVESInputTag() const;

    // EventID
    Entry(std::string const& name, EventID const& tag, bool is_tracked);
    EventID getEventID() const;

    // VEventID
    Entry(std::string const& name, std::vector<EventID> const& vtag, bool is_tracked);
    std::vector<EventID> getVEventID() const;

    // LuminosityBlockID
    Entry(std::string const& name, LuminosityBlockID const& tag, bool is_tracked);
    LuminosityBlockID getLuminosityBlockID() const;

    // VLuminosityBlockID
    Entry(std::string const& name, std::vector<LuminosityBlockID> const& vtag, bool is_tracked);
    std::vector<LuminosityBlockID> getVLuminosityBlockID() const;

    // LuminosityBlockRange
    Entry(std::string const& name, LuminosityBlockRange const& tag, bool is_tracked);
    LuminosityBlockRange getLuminosityBlockRange() const;

    // VLuminosityBlockRange
    Entry(std::string const& name, std::vector<LuminosityBlockRange> const& vtag, bool is_tracked);
    std::vector<LuminosityBlockRange> getVLuminosityBlockRange() const;

    // EventRange
    Entry(std::string const& name, EventRange const& tag, bool is_tracked);
    EventRange getEventRange() const;

    // VEventRange
    Entry(std::string const& name, std::vector<EventRange> const& vtag, bool is_tracked);
    std::vector<EventRange> getVEventRange() const;

    // ParameterSet
    Entry(std::string const& name, ParameterSet const& val, bool is_tracked);
    ParameterSet getPSet() const;

    // vPSet
    Entry(std::string const& name, std::vector<ParameterSet> const& val, bool is_tracked);

    std::vector<ParameterSet> getVPSet() const;

    // coded string
    Entry(std::string name, std::string_view);
    Entry(std::string name, std::string_view type, std::string_view value, bool is_tracked);
    Entry(std::string name, std::string_view type, std::vector<std::string> const& value, bool is_tracked);

    ~Entry() = default;
    Entry(Entry const&) = default;
    Entry(Entry&&) = default;
    Entry& operator=(Entry const&) = default;
    Entry& operator=(Entry&&) = default;
    // encode

    std::string toString() const;
    void toString(std::string& result) const;
    void toDigest(cms::Digest& digest) const;

    size_t sizeOfString() const { return rep_.size() + 4; }

    // access
    bool isTracked() const { return tracked_ == '+'; }

    char typeCode() const { return type_; }

    friend std::ostream& operator<<(std::ostream& ost, Entry const& entry);

    //empty string view denotes failure to find bounds
    static std::string_view bounds(std::string_view, std::size_t iEndHint);

  private:
    std::string name_;
    std::string rep_;
    char type_;
    char tracked_;

    // verify class invariant
    void validate() const;

    // decode
    bool fromString(std::string_view::const_iterator b, std::string_view::const_iterator e);

    // helpers to throw exceptions
    void throwValueError(char const* expectedType) const;
    void throwEntryError(char const* expectedType, std::string const& badRep) const;
    void throwEncodeError(char const* type) const;

  };  // Entry

  inline bool operator==(Entry const& a, Entry const& b) { return a.toString() == b.toString(); }

  inline bool operator!=(Entry const& a, Entry const& b) { return !(a == b); }
}  // namespace edm

#endif