CultureQuestORG/SDP2023

package ch.epfl.culturequest.social;

import androidx.annotation.NonNull;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

public final class Post {
    private String postId;
    private String uid;
    private String imageUrl;
    private String artworkName;
    private long time;
    private int likes;
    private List<String> likers;

    /**
     * Constructor for a Post
     *
     * @param postId      the id of the post
     * @param uid         the id of the user who posted the post
     * @param imageUrl    the url of the image
     * @param artworkName the name of the artwork
     * @param time        the time of the post
     * @param likes       the number of likes
     * @param likers      the list of users who liked the post
     */
    public Post(String postId, String uid, String imageUrl, String artworkName, long time, int likes, List<String> likers) {
        this.postId = postId;
        this.uid = uid;
        this.imageUrl = imageUrl;
        this.artworkName = artworkName;
        this.time = time;
        this.likes = likes;
        this.likers = new ArrayList<>(likers);
    }

    /**
     * Default Constructor for a Post for Firebase
     */
    public Post() {
        this.postId = UUID.randomUUID().toString();
        this.uid = "";
        this.imageUrl = "";
        this.artworkName = "";
        this.time = System.currentTimeMillis();
        this.likes = 0;
        this.likers = new ArrayList<>();
    }

    /**
     * Get the post id
     *
     * @return the post id
     */
    public String getPostId() {
        return postId;
    }

    public void setPostId(String postId) {
        this.postId = postId;
    }

    /**
     * Get the user id
     *
     * @return the user id
     */
    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    /**
     * Get the image url
     *
     * @return the image url
     */
    public String getImageUrl() {
        return imageUrl;
    }

    public void setImageUrl(String imageUrl) {
        this.imageUrl = imageUrl;
    }

    /**
     * Get the artwork name
     *
     * @return the artwork name
     */
    public String getArtworkName() {
        return artworkName;
    }

    public void setArtworkName(String artworkName) {
        this.artworkName = artworkName;
    }

    /**
     * Get the time of the post
     *
     * @return the time
     */
    public long getTime() {
        return time;
    }

    public void setTime(long time) {
        this.time = time;
    }

    /**
     * Get the number of likes
     *
     * @return the number of likes
     */
    public int getLikes() {
        return likes;
    }

    public void setLikes(int likes) {
        this.likes = likes;
    }

    /**
     * Get the list of users who liked the post
     *
     * @return the list of users who liked the post
     */
    public List<String> getLikers() {
        return likers;
    }

    public void setLikers(List<String> likers) {
        this.likers.clear();
        this.likers.addAll(likers);
    }

    /**
     * Add a like to the post
     *
     * @param uid the user id of the user who liked the post
     */
    public void addLike(String uid) {
        if (!likers.contains(uid)) {
            likers.add(uid);
            likes++;
        }

    }

    /**
     * Remove a like from the post
     *
     * @param uid the user id of the user who unliked the post
     */
    public void removeLike(String uid) {
        if (likers.contains(uid)) {
            likers.remove(uid);
            likes--;
        }
    }

    /**
     * Check if the post is liked by a user
     *
     * @param uid the user id of the user
     * @return true if the post is liked by the user, false otherwise
     */
    public boolean isLikedBy(String uid) {
        return likers.contains(uid);
    }

    @NonNull
    @Override
    public String toString() {
        return "Post of artwork: " + artworkName + "\n"
                + "by user: " + uid + "\n"
                + "at time:" + time + "\n"
                + "with postId:" + postId + "\n"
                + "imageUrl:" + imageUrl + "\n"
                + "likes:" + likes + "\n"
                + "likers:" + likers + "\n";
    }

    @Override
    public boolean equals(Object o) {
        if (o == this) {
            return true;
        }
        if (!(o instanceof Post)) {
            return false;
        }
        Post p = (Post) o;
        return p.toString().equals(this.toString());
    }
}