#include <array>

#include <cstdint>

#include <memory>

#include <vector>

#include "statefunctions/router.h"

#include "statefunctions/stateutilities.h"

#include "types/event.h"

#include "types/gamestate.h"

#include "types/piecetype.h"

#include "types/statefunction.h"

#include "types/walls.h"

namespace mahjong {

namespace {

std::unique_ptr<GameState> Replacement(std::unique_ptr<GameState> state) {

  const Piece draw = state->walls.TakeReplacementTile();

  state->hands.at(state->currentPlayer).live.push_back(draw);

  state->hands.at(state->currentPlayer).sort();

  state->pendingPiece = draw;

  AlertPlayers(*state,

               Event{

                   .type = Event::kDora,  // type

                   .player = -1,          // player

                   .piece = static_cast<int16_t>(

                       state->walls.GetDoras().back().toUint8_t()),  // piece

                   .decision = false,                                // decision

               });

  state->nextState = StateFunctionType::kPlayerHand;

  return state;

}

}  // namespace

REGISTER_ROUTE(Replacement, StateFunctionType::kReplacement);

}  // namespace mahjong