package de.fanta.challenges;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Random;
import java.util.stream.Collectors;
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.configuration.file.FileConfiguration;

public class RandomDrops {
    private final ArrayList<Material> BLOCKS;

    private final ArrayList<Material> ITEM_DROPS;

    private HashMap<Material, Material> drops = new HashMap<>();

    public RandomDrops() {
        this.BLOCKS = (ArrayList<Material>) Arrays.<Material> stream(Material.values()).filter(mat -> mat.isBlock()).collect(Collectors.toList());
        this.ITEM_DROPS = (ArrayList<Material>) Arrays.<Material> stream(Material.values()).filter(mat -> (mat.isItem() || mat == Material.BEDROCK)).collect(Collectors.toList());
    }

    public void shuffleItems() {
        Collections.shuffle(this.ITEM_DROPS);
        ArrayList<Material> itemDropsCopy = new ArrayList<>();
        this.ITEM_DROPS.forEach(m -> itemDropsCopy.add(m));
        this.BLOCKS.forEach(mat -> {
            int r = (new Random()).nextInt(itemDropsCopy.size() - 1);
            this.drops.put(mat, itemDropsCopy.get(r));
            itemDropsCopy.remove(r);
        });
        saveItems();
    }

    public void saveItems() {
        FileConfiguration config = Challenges.getplugin().getRndDropsConfig();
        config.set("drops", this.drops.entrySet().stream().map(entry -> (new StringBuilder()).append(entry.getKey()).append(":").append(entry.getValue()).toString()).collect(Collectors.toList()));
    }

    public void loadItems() {
        this.drops.clear();
        FileConfiguration config = Challenges.getplugin().getRndDropsConfig();
        if (config.isList("drops")) {
            config.getStringList("drops").forEach(str -> {
                String[] materialSplitted = str.split(":");
                this.drops.put(Material.getMaterial(materialSplitted[0]), Material.getMaterial(materialSplitted[1]));
            });
        } else {
            shuffleItems();
        }
    }

    public Material getMaterialFromBlock(Block block) {
        return this.drops.get(block.getType());
    }
}