package com.aiteacher.chat;

import jakarta.persistence.*;
import java.time.Instant;
import java.util.UUID;

@Entity
@Table(name = "chat_session")
public class ChatSession {

    @Id
    @GeneratedValue(strategy = GenerationType.UUID)
    private UUID id;

    @Column(name = "topic_id", length = 100)
    private String topicId;

    @Column(name = "created_at", nullable = false)
    private Instant createdAt;

    public ChatSession() {
    }

    public ChatSession(String topicId) {
        this.topicId = topicId;
        this.createdAt = Instant.now();
    }

    public UUID getId() {
        return id;
    }

    public String getTopicId() {
        return topicId;
    }

    public void setTopicId(String topicId) {
        this.topicId = topicId;
    }

    public Instant getCreatedAt() {
        return createdAt;
    }

    public void setCreatedAt(Instant createdAt) {
        this.createdAt = createdAt;
    }
}