#ifndef roza_PROGRAM_HPP
#define roza_PROGRAM_HPP

#include "commons.hpp"
#include "opcodes.hpp"
#include "Value.hpp"

namespace roza
{
  using param_t = int;

  struct Instr {
    Opcode opcode;
    std::optional<param_t> param;
  };

  class Program
  {
  public:
    explicit Program();
    virtual ~Program();

    size_t size() const { return m_instrs.size(); }

    void push_instr(Opcode opcode, std::optional<param_t> param = std::nullopt);
    size_t push_value(std::shared_ptr<Value> value);

    Opcode opcode(size_t index) const;
    std::optional<param_t> param(size_t index) const;
    std::shared_ptr<Value> value(size_t index) const;
    bool has_value(size_t index) const;

    void set_param(size_t index, param_t param);

    std::string string() const;

  private:
    std::vector<Instr> m_instrs;
    std::vector<std::shared_ptr<Value>> m_values;
  };
}

#endif