/*
 * TileMapComponent.h
 *
 *  Created on: Mar 21, 2020
 *      Author: ayoungblood
 */

#ifndef SRC_ECS_TILEMAPCOMPONENT_H_
#define SRC_ECS_TILEMAPCOMPONENT_H_

#include "ECS.h"
#include "SDL2/SDL.h"
#include "../assetmgr/AssetManager.h"
#include <fstream>
#include <iostream>
#include <string>
#include <tuple>
// #include <algorithm>
// #include <iterator>
#include "tmxparser.h"

class TileMapComponent : public Component
{
public:
//     TransformComponent *transform;
	SDL_Texture* texture;
	SDL_Rect srcRect, destRect;
// 	Vector2D position;
//     std::tuple <SDL_Rect,SDL_Rect> tile;
	tmxparser::TmxMap map;
	int globalScale;
	std::vector<SDL_Rect> tileSet;
	std::vector<SDL_Rect> destRects;
// 	std::tuple <int,int> oPosition;
	std::vector<std::tuple<int,int>> initialPositions;
// 	std::array destRects;
	int totalTiles;
	
	TileMapComponent() = default;

	~TileMapComponent()
	{
		SDL_DestroyTexture(texture);
	}

	TileMapComponent(tmxparser::TmxMap loadedMap, int gScale, int offsetX, int offsetY)
	{
		map = loadedMap;
		std::string texturePath = "assets/textures/tiles/" + loadedMap.tilesetCollection[0].name + ".png";
		Game::assets->AddTexture(map.tilesetCollection[0].name, texturePath.c_str());
		setTex(map.tilesetCollection[0].name);
		globalScale = gScale;
// 		=========== Setup Tile Set ===========
		totalTiles = map.tilesetCollection[0].colCount*map.tilesetCollection[0].rowCount;
// 		std::cout << "Number of Tiles: " << totalTiles << std::endl;
		tileSet.resize(totalTiles);

		for (int r=0;r<map.tilesetCollection[0].rowCount;r++){
			for (int c=0;c<map.tilesetCollection[0].colCount;c++){
				srcRect.x = c*map.tilesetCollection[0].tileWidth;
				srcRect.y = r*map.tilesetCollection[0].tileHeight;
				srcRect.w = srcRect.h = map.tileWidth;
				int element = r*map.tilesetCollection[0].colCount+c;
// 				std::cout << "element " << element << std::endl;
// 				std::cout << "srcRect= x: " << srcRect.x << " y: " << srcRect.y << " srcRect.w & h: " << srcRect.w << std::endl;
				tileSet[element] = srcRect;
			}
		}
		
// 		=========== Setup Tile Map ============
		destRects.resize(map.width*map.height);
		initialPositions.resize(map.width*map.height);		
		for (int r = 0;r<map.height;r++){
			for (int c = 0;c<map.width;c++){
				int elem = c+r*map.width;
				SDL_Rect thisRect = SDL_Rect();
				thisRect.x = c*map.tilesetCollection[0].tileWidth*globalScale-offsetX*globalScale;
				thisRect.y = r*map.tilesetCollection[0].tileWidth*globalScale-offsetY*globalScale;
				thisRect.w = thisRect.h = map.tileWidth * globalScale;
				std::tuple<int,int> ogPos = std::make_tuple(thisRect.x,thisRect.y);
				initialPositions[elem] = ogPos;
				destRects[elem] = thisRect;
// 				std::cout << "destRects[" << elem << "].x = " << destRects[elem].x << "].y = " << destRects[elem].y << "].w = " << destRects[elem].w << std::endl;
            }
		}
		destRect.w = destRect.h = map.tileWidth * gScale;
	}

	void update() override
	{
		if (Game::gsm->currentState == GameStateManager::ST_COREGAME){
			
			for (int i=0;i<destRects.size();i++){
				destRects[i].x = std::get<0>(initialPositions[i]) - Game::camera.x;
				destRects[i].y = std::get<1>(initialPositions[i]) - Game::camera.y;
			}
		}
	}

	void draw() override
	{
        //iterate through rows and columns of the map to draw the tiles
// First cycle through rows
		for (int r = 0;r<map.height;r++){
// Next cycle through each column or tile in that row:
			for (int c = 0;c<map.width;c++){
				int i = r*map.width+c;
				int elem = c+r*map.width;
				int tileToDraw = map.layerCollection[0].tiles[i].gid-1;
// 				SDL_Rect thisRect = SDL_Rect();
// 				thisRect.x = c*map.tilesetCollection[0].tileWidth*globalScale;
// 				thisRect.y = r*map.tilesetCollection[0].tileWidth*globalScale;
// 				thisRect.w = thisRect.h = map.tileWidth * globalScale;
// 				destRects[elem] = thisRect;
				TextureManager::Draw(texture, tileSet[tileToDraw], destRects[elem], SDL_FLIP_NONE);
// 				}
            }
		}

	}

    void setTex(std::string id)
	{
		texture = Game::assets->GetTexture(id);
	}
};

#endif /* SRC_ECS_TILEMAPCOMPONENT_H_ */