#include "Program.hpp"

namespace roza
{
  /*explicit*/ Program::Program()
  {
  }

  /*virtual*/ Program::~Program()
  {
  }

  void Program::push_instr(Opcode opcode, std::optional<param_t> param)
  {
    m_instrs.push_back({opcode, param});
  }

  size_t Program::push_value(std::shared_ptr<Value> value)
  {
    size_t sz = m_values.size();
    m_values.push_back(value);
    return sz;
  }

  Opcode Program::opcode(size_t index) const
  {
    assert(index < size());
    return m_instrs[index].opcode;
  }

  std::optional<param_t> Program::param(size_t index) const
  {
    assert(index < size());
    return m_instrs[index].param;
  }

  std::shared_ptr<Value> Program::value(size_t index) const
  {
    assert(has_value(index));
    return m_values[index];
  }

  bool Program::has_value(size_t index) const
  {
    return index < m_values.size();
  }

  std::string Program::string() const
  {
    std::stringstream ss;
    size_t addr = 0;

    for (auto const& instr: m_instrs)
      {
        ss << addr++
           << "\t"
           << (OpcodeStr[instr.opcode])
           << "\t";

        if (instr.param)
          {
            ss << std::to_string(*instr.param);

            if (has_value(*instr.param))
              {
                ss << "\t" << "(" << value(*instr.param)->string() << ")";
              }
          }

        ss << "\n";
      }

    return ss.str();
  }


}