package de.craftix.game;

import de.craftix.game.block.Block;
import de.craftix.game.block.Material;
import de.craftix.game.entity.Player;

import java.awt.*;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;

public class World {

    private int blocksX;
    private int blocksY;
    private Block[][] blocks;
    private File worldFile;

    public World(String worldFile) {
        this.worldFile = new File("worlds/" + worldFile);
        loadWorldFromFile();
    }

    public void update() {
        for(int row = 0; row < blocksY; row++) {
            for(int col = 0; col < blocksX; col++) {
                blocks[row][col].update();
            }
        }
    }

    public void render(Graphics2D g) {
        int blocksRendered = 0;
        Player player = Playstate.player;
        int startX = player.getCenterX() - GamePanel.width / GamePanel.SCALE / 2;
        int startY = player.getCenterY() - GamePanel.height / GamePanel.SCALE / 2;
        int endX = player.getCenterX() + GamePanel.width / GamePanel.SCALE / 2 + Game.BLOCKSIZE;
        int endY = player.getCenterY() + GamePanel.height / GamePanel.SCALE / 2 + Game.BLOCKSIZE;

        for (int row = startY; row <= endY; row += Game.BLOCKSIZE) {
            for (int col = startX; col <= endX; col += Game.BLOCKSIZE) {
                int blockX = getColTile(col);
                int blockY = getRowTile(row);
                if (blockX >= 0 && blockY >= 0 && blockX < this.blocksX && blockY < this.blocksY) {
                    blocks[blockY][blockX].render(g);
                    blocksRendered++;
                }
            }
        }

        g.setColor(Color.WHITE);
        g.drawString("Blocks Rendered: " + blocksRendered, 5, 10);
    }

    private void loadWorldFromFile() {
        try {
            BufferedReader reader = new BufferedReader(new FileReader(worldFile));
            blocksX = Integer.parseInt(reader.readLine());
            blocksY = Integer.parseInt(reader.readLine());
            blocks = new Block[blocksY][blocksX];

            for (int row = 0; row < blocksY; row++) {
                String line = reader.readLine();
                String[] tokens = line.split(" ");
                for (int col = 0; col < blocksX; col++){
                    int id = Integer.parseInt(tokens[col]);
                    blocks[row][col] = new Block(Material.values()[id], col * Game.BLOCKSIZE, row * Game.BLOCKSIZE, Game.BLOCKSIZE, Game.BLOCKSIZE);
                }
            }
            reader.close();
        } catch (Exception e) {e.printStackTrace();}
    }

    public int getRowTile(int y) {return y / Game.BLOCKSIZE;}
    public int getColTile(int x) {return x / Game.BLOCKSIZE;}

    public Block[][] getBlocks() {return blocks;}
    public Block getBlock(float x, float y) {return blocks[getRowTile((int)y)][getColTile((int)x)];}

}