/* -*- C++ -*-
 * Serene Programming Language
 *
 * Copyright (c) 2019-2023 Sameer Rahmani <lxsameer@gnu.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef SERENE_EXPRS_SYMBOL_H
#define SERENE_EXPRS_SYMBOL_H

#include "serene/context.h"
#include "serene/export.h"
#include "serene/exprs/expression.h"
#include "serene/namespace.h"

#include <llvm/ADT/StringRef.h>

#include <string>

namespace serene {

namespace exprs {

/// This data structure represent the Lisp symbol. Just a symbol
/// in the context of the AST and nothing else.
class SERENE_EXPORT Symbol : public Expression {

public:
  std::string name;
  std::string nsName;

  Symbol(const reader::LocationRange &loc, llvm::StringRef name,
         llvm::StringRef currentNS)
      : Expression(loc) {
    // IMPORTANT NOTE: the `name` and `currentNS` should be valid string and
    //                 already validated.
    auto partDelimiter = name.find('/');
    if (partDelimiter == std::string::npos) {
      nsName     = currentNS.str();
      this->name = name.str();

    } else {
      this->name = name.substr(partDelimiter + 1, name.size()).str();
      nsName     = name.substr(0, partDelimiter).str();
    }
  };

  Symbol(Symbol &s) : Expression(s.location) {
    this->name   = s.name;
    this->nsName = s.nsName;
  }

  ExprType getType() const override;
  std::string toString() const override;

  MaybeNode analyze(semantics::AnalysisState &state) override;
  void generateIR(serene::Namespace &ns, mlir::ModuleOp &m) override {
    UNUSED(ns);
    UNUSED(m);
  };

  ~Symbol() = default;

  static bool classof(const Expression *e);
};

} // namespace exprs
} // namespace serene

#endif