#include "Level.h"
#include <fstream>
#include <iostream>
#include <string>

void
Level::loadLevelFromFile(const char* filePath)
{
  std::ifstream mapFile(filePath);
  if (mapFile.is_open()) {

    // each element in the map has a unique ID
    // some magic but player is always 0
    const int playerId = 0;
    // from 1 -> N each enemy and treasure has its  own unique ID
    // IDs are unique entirely, not just per enemy or treasure


    std::string line;
    int y = 0;
    while (std::getline(mapFile, line)) {
      this->map.emplace_back();
      int x = 0;
      for (char c : line) {
        if (c == WALL_TKN) {
          this->map[y].push_back(WALL_SPACE);
        } else if (c == EMPTY_TKN) {
          this->map[y].push_back(BLANK_SPACE);
        } else if (c == ENEMY_TKN) {
          this->enemyPositions.push_back(
            { .id = this->nextId(), .x = x, .y = y });
          this->map[y].push_back(BLANK_SPACE);
        } else if (c == PLAYER_TKN) {
          this->player = { .id = playerId, .x = x, .y = y };
          this->map[y].push_back(BLANK_SPACE);
        } else if (c == TREASURE_TKN) {
          this->treasurePositions.push_back(
            { .id = this->nextId(), .x = x, .y = y });
          this->map[y].push_back(BLANK_SPACE);
        } else {
          continue;
        }
        ++x;
      }
      ++y;
    }
  }
  mapFile.close();
}

bool
Level::isEmpty(int x, int y)
{
  return map[y][x] == BLANK_SPACE;
}

bool
Level::canStep(int dx, int dy)
{
  bool res = map[player.y + dy][player.x + dx] != WALL_SPACE;
  return res;
}

void
Level::print()
{
  int x = 0;
  int y = 0;
  for (auto& row : map) {
    for (auto& tile : row) {
      bool printed = false;
      if (player.x == x && player.y == y) {
        std::cout << "p";
        printed = true;
      }
      for (auto pos : enemyPositions) {
        if (pos.x == x && pos.y == y) {
          std::cout << "e";
          printed = true;
        }
      }
      for (auto pos : treasurePositions) {
        if (pos.x == x && pos.y == y) {
          std::cout << "t";
          printed = true;
        }
      }
      if (tile == WALL_SPACE) {
        std::cout << tile;
        printed = true;
      }
      if (!printed) {
        std::cout << " ";
      }
      std::cout << " ";
      ++x;
    }
    std::cout << "\n";
    ++y;
    x = 0;
  }
}

int
Level::nextId()
{
  return idCounter++;
}