turings-tarpit/game_engine.cpp

#include <map>
#include <string>
#include <iostream>
#include <fmt/core.h>
#include <fmt/color.h>
#include "game_engine.hpp"
#include <cassert>

const auto ERROR = fmt::emphasis::bold | fg(fmt::color::red);

using namespace fmt;
using namespace std;

GameEngine::GameEngine(int hp) : starting_hp(hp) {
  hit_points = starting_hp;
};

int GameEngine::determine_damage(string &type) {
  try {
    return damage_types.at(type);
  } catch(std::out_of_range &err) {
    print(ERROR, "BAD DAMAGE TYPE {}\n", type);
    return 0;
  }
}

void GameEngine::reset() {
  streak = 0;
  hit_points = starting_hp;
}

bool GameEngine::hit(string &type) {
  int damage = determine_damage(type);
  hit_points -= damage;
  ++hits_taken;
  return is_dead();
}

void GameEngine::heal() {
  hit_points = hit_points * 1.10;
  if(hit_points > 100) hit_points = 100;
}

bool GameEngine::is_dead() {
  return hit_points <= 0;
}

void GameEngine::start(GameEvent ev) {
  state(GameState::IDLE);
  idle(ev);
}

void GameEngine::idle(GameEvent ev) {
  if(ev == GameEvent::BUILD_START) {
    hits_taken = 0;
    state(GameState::IN_ROUND);
  } else {
    state(GameState::IDLE);
  }
}

void GameEngine::in_round(GameEvent ev, string &hit_type) {
  switch(ev) {
    case GameEvent::HIT:
      hit(hit_type);
      if(is_dead()) {
        state(GameState::DEAD);
      } else {
        state(GameState::IN_ROUND);
      }
      break;
    case GameEvent::BUILD_SUCCESS:
      state(GameState::SUCCESS);
      break;
    case GameEvent::BUILD_FAILED:
      state(GameState::FAILURE);
      break;
    default:
      state(GameState::IN_ROUND);
  }
}

void GameEngine::dead(GameEvent ev) {
  if(ev == GameEvent::BUILD_DONE) {
    reset();
    state(GameState::FAILURE);
    failure(ev);
  } else if(ev == GameEvent::HIT) {
    ++hits_taken;
  } else {
    state(GameState::DEAD);
  }
}

void GameEngine::success(GameEvent ev) {
  assert(ev == GameEvent::BUILD_DONE && "success state expected BUILD_DONE");
  ++rounds;
  ++streak;
  heal();
  state(GameState::IDLE);
}

void GameEngine::failure(GameEvent ev) {
  assert(ev == GameEvent::BUILD_DONE && "failure state expected BUILD_DONE");
  ++rounds;
  streak = 0;
  state(GameState::IDLE);
}