#include "systems.hpp"

using namespace Components;

void System::enemy_pathing(DinkyECS::World &world, Map &game_map, Player &player) {
  // move enemies system
  world.system<Position, Motion>([&](const auto &ent, auto &position, auto &motion) {
    if(ent != player.entity) {
      Point out = position.location;
      game_map.neighbors(out, false);
      motion = { int(out.x - position.location.x), int(out.y - position.location.y)};
    }
  });
}


void System::motion(DinkyECS::World &world, Map &game_map) {
  world.system<Position, Motion>([&](const auto &ent, auto &position, auto &motion) {
    Point move_to = {
      position.location.x + motion.dx,
      position.location.y + motion.dy
    };
    motion = {0,0}; // clear it after getting it

    if(game_map.inmap(move_to.x, move_to.y) && !game_map.iswall(move_to.x,move_to.y)) {
      game_map.clear_target(position.location);
      position.location = move_to;
    }
  });
}


void System::combat(DinkyECS::World &world, Player &player) {
  const auto& player_position = world.component<Position>(player.entity);

  world.system<Position, Combat>([&](const auto &ent, auto &pos, auto &combat) {
      if(ent != player.entity && pos.location.x == player_position.location.x &&
          pos.location.y == player_position.location.y) {
      }
  });
};


void System::draw_entities(DinkyECS::World &world, ftxui::Canvas &canvas) {
  world.system<Position, Tile>([&](const auto &ent, auto &pos, auto &tile) {
    canvas.DrawText(pos.location.x*2, pos.location.y*4, tile.chr);
  });
}