package cc.mrbird.febs.dapp.utils;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.RandomUtil;
import lombok.extern.slf4j.Slf4j;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * @author wzy
 * @date 2022-07-14
 **/
@Slf4j
public class BoxUtil {

    public static volatile List<Box> boxList = Collections.synchronizedList(new ArrayList<>());

    public synchronized static Box openBox() {
        if (CollUtil.isEmpty(boxList)) {
            Box box1 = new Box(1, 6);
            Box box2 = new Box(2, 1);
            Box box3 = new Box(3, 1);
            Box box4 = new Box(4, 1);
            Box box5 = new Box(5, 1);
            boxList.add(box1);
            boxList.add(box2);
            boxList.add(box3);
            boxList.add(box4);
            boxList.add(box5);
        }

        int min = 1;
        int minIndex = 1;
        int max = 1;

        for (int i = 0; i < boxList.size(); i++) {
            Box box = boxList.get(i);
            if (i != 0) {
                minIndex += boxList.get(i - 1).getCount();
            }
            max += box.getCount();
            box.setMin(minIndex);
            box.setMax(max);
        }

        int i = RandomUtil.randomInt(min, max);

        Box result = new Box();
        for (Box box : boxList) {
            if (box.getMin() <= i && box.getMax() > i) {
                result = box;
                int count = box.getCount();
                count--;

                box.setCount(count);
                if (count == 0) {
                    boxList.remove(box);
                }
                break;
            }
        }

        return result;
    }

    public static class Box {
        private int index;

        private int count;

        public Box() {}

        public Box(int index, int count) {
            this.index = index;
            this.count = count;
        }

        private int min;

        private int max;

        public int getIndex() {
            return index;
        }

        public void setIndex(int index) {
            this.index = index;
        }

        public int getCount() {
            return count;
        }

        public void setCount(int count) {
            this.count = count;
        }

        public int getMin() {
            return min;
        }

        public void setMin(int min) {
            this.min = min;
        }

        public int getMax() {
            return max;
        }

        public void setMax(int max) {
            this.max = max;
        }
    }

}