from django.db import models
from inventory.models import Dealer


class ChatLog(models.Model):
    """
    Handles storage and representation of chat logs between users and chatbot.

    This class is designed to store chat logs, which include user messages, chatbot
    responses, their associated dealer, and timestamps of when the chat entries are
    created. It supports linking chat logs to a specific dealer using a foreign key
    relationship. The class provides an easy and structured way to manage and retrieve
    historical chat data.

    :ivar dealer: The dealer associated with this chat log.
    :type dealer: Dealer
    :ivar user_message: The message sent by the user.
    :type user_message: str
    :ivar chatbot_response: The response generated by the chatbot.
    :type chatbot_response: str
    :ivar timestamp: The date and time when the chat log entry was created.
    :type timestamp: datetime
    """
    dealer = models.ForeignKey(Dealer, on_delete=models.CASCADE, related_name='chatlogs')
    user_message = models.TextField()
    chatbot_response = models.TextField()
    timestamp = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.user_message