#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_map();

  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("map placement test", "[map:placement]") {
  for(int i = 0; i < 50; i++) {
    size_t width = Random::uniform<size_t>(9, 21);
    size_t height = Random::uniform<size_t>(13, 25);
    Map map(width, height);
    WorldBuilder builder(map);
    builder.generate_rooms();
    map.invert_space();

    for(size_t rnum = 0; rnum < map.room_count(); rnum++) {
      Room &room = map.room(rnum);
      Point pos;

      REQUIRE(map.place_entity(rnum, pos));
      // matrix::dump("ROOM PLACEMENT TEST", map.walls(), pos.x, pos.y);

      REQUIRE(!map.iswall(pos.x, pos.y));
      REQUIRE(pos.x >= room.x);
      REQUIRE(pos.y >= room.y);
      REQUIRE(pos.x <= room.x + room.width);
      REQUIRE(pos.y <= room.y + room.height);
    }
  }
}

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.$walls = walls;
    map.$paths.$input = input;

    REQUIRE(map.INVARIANT());

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

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

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