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

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

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

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

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

    REQUIRE(paths == expected);
  }
}

TEST_CASE("bsp algo test", "[map]") {
  Map map(20, 20);
  map.generate();
}

TEST_CASE("dumping and debugging", "[map]") {
  Map map(20, 20);
  map.generate();

  dump_map("GENERATED", map.paths());
  map.dump();
}

TEST_CASE("lighting test", "[map]") {
  Map map(20,20);
  map.generate();
  Point light1 = map.place_entity(0);
  Point light2 = map.place_entity(1);
  LightSource source1{7,1};
  LightSource source2{3,2};

  map.reset_light();

  map.set_light_target(light1);
  map.set_light_target(light2);

  map.path_light();

  map.render_light(source1, light1);
  map.render_light(source2, light2);

  map.clear_light_target(light1);
  map.clear_light_target(light2);

  const auto &lighting = map.lighting();

  // confirm light is set at least at and around the two points
  REQUIRE(lighting[light1.y][light1.x] == lighting::LEVELS[source1.strength]);
  REQUIRE(lighting[light2.y][light2.x] == lighting::LEVELS[source2.strength]);
}

TEST_CASE("camera control", "[map]") {
  Map map(20,20);
  map.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("pathing", "[map]") {
  Map map(20,20);
  map.generate();
  REQUIRE(map.can_move({0,0}) == false);
  REQUIRE(map.iswall(0,0) == true);
}