package de.anxietyprime.swajodel;

import java.util.Date;
import java.util.Optional;
import java.util.Vector;

public class JodelPost {
    // id of the post
    public Long id;
    // id of the author in db
    private Long authorID;
    // anonymized authorID
    public Long anonymousID;
    // title of the post
    public String title;
    // content of the post
    public String content;
    // date of the post
    public Date date;
    // location if the post
    public Location location;
    // list of all comments for the post
    public Vector<JodelPost> comments = new Vector<>();
    // the own reaction (null = none, true = positive, false = negative)
    public Optional<Boolean> reaction;
    // all other reactions
    public Reaction reactions;

    // anonymize function to recursively anonymize the posts
    public void anonymize(Optional<Vector<Long>> idCache) {
        // check if this is the first post in this process
        if (idCache.isEmpty()) {
            // create a new Vector as cache
            idCache = Optional.of(new Vector());
        }

        // get the anonymized id as index in cached authorIDs
        int i = idCache.get().indexOf(this.authorID);
        // if the index is -1 the authorID has not been cached jet
        if (i == -1) {
            // set the current anonymousID as length of the cache (== next index)
            this.anonymousID = (long) idCache.get().size();
            // push the current authorID to to cache
            idCache.get().add(this.authorID);
        }
        // the authorID has been anonymized once before, so we can get it from cache
        else this.anonymousID = (long) i;

        // recursively apply this algorithm for all comments, but include the idCache
        for (JodelPost comment : this.comments) {
            comment.anonymize(idCache);
        }
    }

    // add a comment if it is really a comment
    public boolean addComment(JodelPost post, long parent) {
        // check if the post is a direct comment
        if (parent == this.id) {
            // add the comment
            this.comments.add(post);
            // return success
            return true;
        }
        // recursively repeat this for all comments
        for (JodelPost comment : this.comments) {
            // return success if the post is a comment on a child
            if (comment.addComment(post, parent)) return true;
        }
        // return no success
        return false;
    }

    // constructor with private authorID
    public JodelPost(long authorID) {
        this.authorID = authorID;
    }
}