package entities;

import notificationsDecorations.NotificationDecoration;
import utils.NotificationState;
import utils.SendNotificationStrategy;

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

public abstract class Notification {
    protected String content;
    protected User user;
    protected List<NotificationDecoration> decorations;

    /**
     * Pas de change state car chemin multiple. On reste sur des enum !
     */
    protected NotificationState state;
    protected SendNotificationStrategy strategy;

    public Notification(String content, User user, SendNotificationStrategy strategy) {
        this.content = content;
        this.user = user;
        this.state = NotificationState.PENDING;
        this.strategy = strategy;
        this.decorations = new ArrayList<>();
    }

    /**
     * Adds a decoration to the notification. Please use a decorator for that
     * @param decoration
     */
    public void addDecoration(NotificationDecoration decoration) {
        decorations.add(decoration);
    }

    protected boolean isSendable() {
        return this.state != NotificationState.SENT && this.state != NotificationState.READ;
    }

    /**
     * Transition d'état spéciale pour indiquer que l'envoie de notification est en échec
     */
    public void setKoState() {
        state = NotificationState.KO;
    }

    /**
     * Fait la transition des états
     */
    public void transitionState() {
        switch (state) {
            case PENDING -> state = NotificationState.SENT;
            case SENT -> state = NotificationState.READ;
        }
    }

    public String getContent() {
        if (isSendable() && content != "") {
            transitionState();
            StringBuilder builder = new StringBuilder();

            if (decorations.isEmpty())
                return content;

            builder.append(content);

            for (final NotificationDecoration decoration : decorations)
                builder.append(decoration.transformContent());

            return builder.toString();
        }
        setKoState();
        return "";
    }
}