/*
 * Copyright 2025 Google. This software is provided as-is, without warranty or representation for any use or purpose. 
 * Your use of it is subject to your agreement with Google.
 */

package com.example.mapper.conversation;

import com.example.dto.dialogflow.conversation.ConversationSessionDTO;
import com.google.cloud.Timestamp;
import com.google.cloud.firestore.DocumentSnapshot;
import org.springframework.stereotype.Component;

import java.time.Instant;
import java.util.HashMap;
import java.util.Map;

@Component
public class FirestoreConversationMapper {

    public ConversationSessionDTO mapFirestoreDocumentToConversationSessionDTO(DocumentSnapshot document) {
        if (document == null || !document.exists()) {
            return null;
        }

        Timestamp createdAtTimestamp = document.getTimestamp("fechaCreacion");
        Timestamp lastModifiedTimestamp = document.getTimestamp("ultimaActualizacion");

        Instant createdAt = (createdAtTimestamp != null) ? createdAtTimestamp.toDate().toInstant() : null;
        Instant lastModified = (lastModifiedTimestamp != null) ? lastModifiedTimestamp.toDate().toInstant() : null;

        return new ConversationSessionDTO(
                document.getString("sessionId"),
                document.getString("userId"),
                document.getString("telefono"),
                createdAt,
                lastModified,
                document.getString("ultimoMensaje"),
                document.getString("pantallaContexto")
        );
    }

    public Map<String, Object> createSessionMap(ConversationSessionDTO session) {
        Map<String, Object> sessionMap = new HashMap<>();
        sessionMap.put("sessionId", session.sessionId());
        sessionMap.put("userId", session.userId());
        sessionMap.put("telefono", session.telefono());
        sessionMap.put("fechaCreacion", session.createdAt());
        sessionMap.put("ultimaActualizacion", session.lastModified());
        sessionMap.put("ultimoMensaje", session.lastMessage());
        sessionMap.put("pantallaContexto", session.pantallaContexto());
        return sessionMap;
    }
}