#pragma once

#include <map>
#include <string>

#include "libexpr/eval.hh"

namespace nix {

struct DrvInfo : public gc {
 public:
  typedef std::map<std::string, Path> Outputs;

 private:
  EvalState* state;

  mutable std::string name;
  mutable std::string system;
  mutable std::string drvPath;
  mutable std::string outPath;
  mutable std::string outputName;
  Outputs outputs;

  bool failed = false;  // set if we get an AssertionError

  Bindings *attrs = nullptr, *meta = nullptr;

  Bindings* getMeta();

  bool checkMeta(Value& v);

 public:
  std::string attrPath; /* path towards the derivation */

  DrvInfo(EvalState& state) : state(&state){};
  DrvInfo(EvalState& state, std::string attrPath, Bindings* attrs);
  DrvInfo(EvalState& state, const ref<Store>& store,
          const std::string& drvPathWithOutputs);

  std::string queryName() const;
  std::string querySystem() const;
  std::string queryDrvPath() const;
  std::string queryOutPath() const;
  std::string queryOutputName() const;
  /** Return the list of outputs. The "outputs to install" are determined by
   * `meta.outputsToInstall`. */
  Outputs queryOutputs(bool onlyOutputsToInstall = false);

  StringSet queryMetaNames();
  Value* queryMeta(const std::string& name);
  std::string queryMetaString(const std::string& name);
  NixInt queryMetaInt(const std::string& name, NixInt def);
  NixFloat queryMetaFloat(const std::string& name, NixFloat def);
  bool queryMetaBool(const std::string& name, bool def);
  void setMeta(const std::string& name, Value* v);

  /*
  MetaInfo queryMetaInfo(EvalState & state) const;
  MetaValue queryMetaInfo(EvalState & state, const std::string & name) const;
  */

  void setName(const std::string& s) { name = s; }
  void setDrvPath(const std::string& s) { drvPath = s; }
  void setOutPath(const std::string& s) { outPath = s; }

  void setFailed() { failed = true; };
  bool hasFailed() { return failed; };
};

#if HAVE_BOEHMGC
typedef std::list<DrvInfo, traceable_allocator<DrvInfo> > DrvInfos;
#else
typedef std::list<DrvInfo> DrvInfos;
#endif

/* If value `v' denotes a derivation, return a DrvInfo object
   describing it. Otherwise return nothing. */
std::optional<DrvInfo> getDerivation(EvalState& state, Value& v,
                                     bool ignoreAssertionFailures);

void getDerivations(EvalState& state, Value& v, const std::string& pathPrefix,
                    Bindings& autoArgs, DrvInfos& drvs,
                    bool ignoreAssertionFailures);

}  // namespace nix