package de.miaurizius.jgame2d.tile;

import de.miaurizius.jgame2d.core.GamePanel;

import javax.imageio.ImageIO;
import java.awt.*;
import java.io.*;

public class TileManager {

    GamePanel panel;
    Tile[] tile;
    int[][] mapTileNum;

    public TileManager(GamePanel panel) {
        this.panel = panel;
        tile = new Tile[10];
        mapTileNum = new int[panel.maxWorldCol][panel.maxWorldRow];
        getTileImage();
        loadMap("testworld");
    }

    public void getTileImage() {
        try {
            tile[0] = new Tile();
            tile[0].image = ImageIO.read(new FileInputStream("assets/tiles/grass.png"));

            tile[1] = new Tile();
            tile[1].image = ImageIO.read(new FileInputStream("assets/tiles/wall.png"));

            tile[2] = new Tile();
            tile[2].image = ImageIO.read(new FileInputStream("assets/tiles/water.png"));

            tile[3] = new Tile();
            tile[3].image = ImageIO.read(new FileInputStream("assets/tiles/earth.png"));

            tile[4] = new Tile();
            tile[4].image = ImageIO.read(new FileInputStream("assets/tiles/tree.png"));

            tile[5] = new Tile();
            tile[5].image = ImageIO.read(new FileInputStream("assets/tiles/sand.png"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void loadMap(String map) {
        try {
            InputStream stream = new FileInputStream("assets/maps/"+map+".map");
            BufferedReader bReader = new BufferedReader(new InputStreamReader(stream));
            int col = 0;
            int row = 0;
            while(col < panel.maxWorldCol && row < panel.maxWorldRow) {
                String line = bReader.readLine();
                while(col < panel.maxWorldCol) {
                    String[] numbers = line.split(" ");
                    int num = Integer.parseInt(numbers[col]);
                    mapTileNum[col][row] = num;
                    col++;
                }
                if(col == panel.maxWorldCol) {
                    col = 0;
                    row++;
                }
            }
            bReader.close();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    public void draw(Graphics2D graphics2D) {
        int worldCol = 0;
        int worldRow = 0;

        while(worldCol < panel.maxWorldCol && worldRow < panel.maxWorldRow) {
            int tileNum = mapTileNum[worldCol][worldRow];
            int worldX = worldCol * panel.tileSize;
            int worldY = worldRow * panel.tileSize;
            int screenX = worldX - panel.player.worldX + panel.player.screenX;
            int screenY = worldY - panel.player.worldY + panel.player.screenY;

            if(worldX + panel.tileSize > panel.player.worldX - panel.player.screenX &&
               worldX - panel.tileSize < panel.player.worldX + panel.player.screenX &&
               worldY + panel.tileSize > panel.player.worldY - panel.player.screenY &&
               worldY - panel.tileSize < panel.player.worldY + panel.player.screenY
            ) graphics2D.drawImage(tile[tileNum].image, screenX, screenY, panel.tileSize, panel.tileSize, null);

            worldCol++;
            if(worldCol == panel.maxWorldCol) {
                worldCol = 0;
                worldRow++;
            }
        }
    }

}