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package com.github.messenger4j.webhook.factory;

import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_ID;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_RECIPIENT;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_SENDER;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_TIMESTAMP;
import static com.github.messenger4j.internal.gson.GsonUtil.getPropertyAsInstant;
import static com.github.messenger4j.internal.gson.GsonUtil.getPropertyAsString;

import com.github.messenger4j.internal.Lists;
import com.github.messenger4j.webhook.Event;
import com.github.messenger4j.webhook.event.FallbackEvent;
import com.google.gson.JsonObject;
import java.time.Instant;
import java.util.List;

/**
 * @author Max Grabenhorst
 * @since 1.0.0
 */
public final class EventFactory {

  private static final List FACTORIES =
      Lists.immutableList(
          new TextMessageEventFactory(),
          new AttachmentMessageEventFactory(),
          new QuickReplyMessageEventFactory(),
          new PostbackEventFactory(),
          new ReferralEventFactory(),
          new OptInEventFactory(),
          new MessageEchoEventFactory(),
          new MessageDeliveredEventFactory(),
          new MessageReadEventFactory(),
          new AccountLinkingEventFactory(),
          new InstantGameEventFactory());

  private EventFactory() {}

  public static Event createEvent(JsonObject messagingEvent) {
    for (BaseEventFactory factory : FACTORIES) {
      if (factory.isResponsible(messagingEvent)) {
        return new Event(factory.createEventFromJson(messagingEvent));
      }
    }
    final String senderId =
        getPropertyAsString(messagingEvent, PROP_SENDER, PROP_ID)
            .orElseThrow(IllegalArgumentException::new);
    final String recipientId =
        getPropertyAsString(messagingEvent, PROP_RECIPIENT, PROP_ID)
            .orElseThrow(IllegalArgumentException::new);
    final Instant timestamp =
        getPropertyAsInstant(messagingEvent, PROP_TIMESTAMP).orElse(Instant.now());
    return new Event(new FallbackEvent(senderId, recipientId, timestamp));
  }
}