#include <cstdint>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>

#include <boost/range/adaptor/indexed.hpp>

#include <doctest.h>

#include <aocpp/Coord.hpp>
#include <aocpp/Startup.hpp>

namespace {

struct World {
  std::vector<aocpp::Coord> ups, downs, lefts, rights;
  std::size_t height, width;
};

auto Parse(std::istream & in) -> World
{
  auto result = World{};
  auto y = std::size_t{0};
  auto line = std::string{};

  while (std::getline(in, line)) {
    for (auto const [x,c] : boost::adaptors::index(line)) {
      switch (c) {
        case '>': result.rights.emplace_back(x-1,y-1); break;
        case '<': result.lefts.emplace_back(x-1,y-1); break;
        case '^': result.ups.emplace_back(x-1,y-1); break;
        case 'v': result.downs.emplace_back(x-1,y-1); break;
      }
    }
    ++y;
  }

  result.height = y - 2;
  result.width = line.size() - 2;

  return result;
}

} // namespace

TEST_SUITE("2022-24 examples") {
  TEST_CASE("example") {
    std::istringstream in {
      "#.#####\n"
      "#.....#\n"
      "#>....#\n"
      "#.....#\n"
      "#...v.#\n"
      "#.....#\n"
      "#####.#\n"
    };
    auto const world = Parse(in);
  }
}

auto Main(std::istream & in, std::ostream & out) -> void
{
  auto const input = Parse(in);
  //out << "Part 1: " << Part1(in) << std::endl;
}