#include <catch2/catch_test_macros.hpp>
#include <fmt/core.h>
#include <nlohmann/json.hpp>
#include <fstream>
#include "map.hpp"
#include "worldbuilder.hpp"

using namespace fmt;
using namespace nlohmann;
using std::string;

json load_test_data(const string &fname) {
  std::ifstream infile(fname);
  return json::parse(infile);
}

TEST_CASE("camera control", "[map]") {
  Map map(20, 20);
  WorldBuilder builder(map);
  builder.generate();

  Point center = map.center_camera({10,10}, 5, 5);

  REQUIRE(center.x == 8);
  REQUIRE(center.y == 8);

  Point translation = map.map_to_camera({10,10}, center);

  REQUIRE(translation.x == 2);
  REQUIRE(translation.y == 2);
}

TEST_CASE("dijkstra algo test", "[map]") {
  json data = load_test_data("./tests/dijkstra.json");

  for(auto &test : data) {
    Matrix expected = test["expected"];
    Matrix input = test["input"];
    Matrix walls = test["walls"];
    Map map(input.size(), input[0].size());
    map.$walls = walls;
    map.$limit = test["limit"];
    map.$paths.$input = input;

    REQUIRE(map.INVARIANT());

    map.make_paths();
    Matrix &paths = map.paths();

    if(paths != expected) {
      println("ERROR! ------");
      dump_map("EXPECTED", expected);
      dump_map("RESULT", paths);
    }

    REQUIRE(map.INVARIANT());
    // FIX ME: REQUIRE(paths == expected);
  }
}