package com.zy.common.utils;

import lombok.extern.slf4j.Slf4j;

import java.lang.reflect.Array;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * news stories for zoneyung
 * Created by vincent on 2022/12/22
 */
@Slf4j
public class News {

    public static void main(String[] args) {
        News.info("info{}", 1);
        News.warn("warn{}", 2);
        News.error("error{}", 3);
        System.out.println(News.print());
    }

    interface NewsSupport<T> { boolean execute(T t); }

    private static final NewsQueue<NewsDomain> NEWS_QUEUE = new NewsQueue<>(NewsDomain.class, 1024);

    @SuppressWarnings({"unchecked"})
    static class NewsQueue<T> {

        private final transient Class<T> cls;
        private final T[] arr;
        private final int capacity;
        private int head;
        private int tail;

        { this.head = 0; this.tail = 0; }

        public NewsQueue(Class<T> cls, int capacity) {
            this.cls = cls;
            this.arr = (T[]) Array.newInstance(cls, capacity);
            this.capacity = capacity;
        }

        public synchronized boolean offer(T t) {
            if (this.tail == this.capacity) {
                this.peek();
            }
            this.reform();
            this.arr[this.tail] = t;
            this.tail ++;
            return true;
        }

        public synchronized boolean put(T t) {
            if (this.tail == this.capacity) {
                return false;
            } else {
                this.reform();
            }
            this.arr[this.tail] = t;
            this.tail ++;
            return true;
        }

        public synchronized T peek() {
            if (this.head == this.tail) {
                return null;
            }
            T t = this.arr[this.head];
            this.head ++;
            this.reform();
            return t;
        }

        private void reform() {
            for (int i = this.head; i < this.tail; i++) {
                this.arr[i-this.head] = this.arr[i];
            }
            this.tail -= this.head;
            this.head = 0;
        }

        public synchronized int size() {
            return this.tail - this.head;
        }

        public synchronized List<T> data() {
            T[] ts = (T[]) Array.newInstance(this.cls, size());
            if (this.tail - this.head >= 0) {
                System.arraycopy(this.arr, this.head, ts, 0, this.tail - this.head);
            }
            return Arrays.asList(ts);
        }

    }

    public static void info(String format, Object... arguments) {
        log.info(format, arguments);
        offer(NewsLevel.INFO, format, arguments);
    }

    public static void warn(String format, Object... arguments) {
        log.warn(format, arguments);
        offer(NewsLevel.WARN, format, arguments);
    }

    public static void error(String format, Object... arguments) {
        log.error(format, arguments);
        offer(NewsLevel.ERROR, format, arguments);
    }

    public static void infoNoLog(String format, Object... arguments) {
        offer(NewsLevel.INFO, format, arguments);
    }

    public static void warnNoLog(String format, Object... arguments) {
        offer(NewsLevel.WARN, format, arguments);
    }

    public static void errorNoLog(String format, Object... arguments) {
        offer(NewsLevel.ERROR, format, arguments);
    }

    public static String printStr() {
        StringBuilder sb = new StringBuilder("[");
        List<NewsDomain> domains = NEWS_QUEUE.data();
        for (int i = 0; i < domains.size(); i++) {
            NewsDomain domain = domains.get(i);
            sb.append("{");
            sb.append("\"l\":").append(domain.level.idx).append(",");
            sb.append("\"v\":\"").append(domain.content).append("\"").append(",");
            sb.append("\"t\":\"").append(domain.date).append("\"");
            sb.append("}");
            if (i < domains.size() - 1) {
                sb.append(",");
            }
        }
        sb.append("]");
        return sb.toString();
    }

    public static List<Map<String, Object>> print() {
        List<Map<String, Object>> res = new ArrayList<>();
        for (NewsDomain datum : NEWS_QUEUE.data()) {
            Map<String, Object> map = new HashMap<>();
            map.put("l", datum.level.idx);
            map.put("v", datum.content);
            map.put("t", datum.date);
            res.add(map);
        }
        return res;
    }

    private static boolean offer(NewsLevel level, String msg, Object[] args) {
        return NEWS_QUEUE.offer(new NewsDomain(level, replace(msg, args), (new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")).format(new Date())));
    }

    private static String replace(String str, Object[] objs){
        if (null == objs || objs.length == 0 || null == str || "".equals(str.trim())) {
            return str;
        } else {
            StringBuilder sb = new StringBuilder(str);
            for (Object obj : objs) {
                int idx = sb.indexOf("{}");
                if (idx == -1) { break; }
                sb.replace(idx, idx + 2, String.valueOf(obj));
            }
            return sb.toString();
        }
    }

    static class NewsDomain {
        public NewsLevel level;
        public String content;
        public String date;

        public NewsDomain(NewsLevel level, String content, String date) {
            this.level = level;
            this.content = content;
            this.date = date;
        }
    }

    enum NewsLevel {
        INFO(1),
        WARN(2),
        ERROR(3),
        ;
        public int idx;
        NewsLevel(int idx) {
            this.idx = idx;
        }
    }

}