package tech.nevets.ngxinstaller;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.UUID;
import java.util.concurrent.ThreadLocalRandom;

public class TextStorage {
    private final String id;
    private final String text;
    private final long expiration;

    private static final List<TextStorage> DB = new ArrayList<>();

    private TextStorage(String id, String text, long expiration) {
        this.id = id;
        this.text = text;
        this.expiration = expiration;
    }

    public String getId() {
        return this.id;
    }

    public static TextStorage getPaste(String id) {
        for (TextStorage ts : DB) {
            if (ts.id.equals(id)) {
                return ts;
            }
        }
        return null;
    }

    public static TextStorage createPaste(String text) {
        TextStorage ts = new TextStorage(generateId(), text, System.currentTimeMillis() + 3600000);
        DB.add(ts);
        return ts;
    }

    private static String generateId() {
        Random rand = ThreadLocalRandom.current();
        UUID uuid = UUID.randomUUID();
        String strUuid = uuid.toString().replace("-", "");
        int randInt = rand.nextInt(strUuid.length() - 4);
        return strUuid.substring(randInt, randInt + 4);
    }

    public static void garbageCollect() {
        DB.removeIf(ts -> ts.expiration < System.currentTimeMillis());
    }
}