#include "Compiler.hpp"
#include "Program.hpp"
#include "Value.hpp"
#include "Node.hpp"
#include "lib/opcodes.hpp"

namespace sk
{
  /*explicit*/ Compiler::Compiler()
  {
  }

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

  void Compiler::compile(std::shared_ptr<Node> node,
                         std::shared_ptr<Program> program)
  {
    switch (node->type())
      {
      case NODE_PROG: {
        for (size_t i=0; i<node->size(); i++)
          {
            compile(node->child(i).lock(), program);
          }
      } break;

      case NODE_INT: {
        auto val = Value::make_int(std::stoi(node->repr()));
        program->push_instr(OPCODE_PUSH_CONST, program->push_value(val));
      } break;

      case NODE_FLOAT: {
        auto val = Value::make_float(std::stof(node->repr()));
        program->push_instr(OPCODE_PUSH_CONST, program->push_value(val));
      } break;

      case NODE_BOOL: {
        auto val = Value::make_bool(node->repr() == "true");
        program->push_instr(OPCODE_PUSH_CONST, program->push_value(val));
      } break;

      case NODE_STRING: {
        auto val = Value::make_string(node->repr());
        program->push_instr(OPCODE_PUSH_CONST, program->push_value(val));
      } break;

      default:
        throw std::runtime_error {std::string()
                                  + "cannot compile unknown node '"
                                  + NodeTypeStr[node->type()]
                                  + "'"};
      }
  }

}