package com.aiteacher.document;

import jakarta.persistence.*;
import java.io.Serializable;
import java.util.Objects;
import java.util.UUID;

@Entity
@Table(name = "chunk_figure_ref")
@IdClass(ChunkFigureRefEntity.PK.class)
public class ChunkFigureRefEntity {

    @Id
    @Column(name = "chunk_id", nullable = false)
    private UUID chunkId;

    @Id
    @Column(name = "figure_id", nullable = false, length = 200)
    private String figureId;

    @Column(name = "mention_page")
    private Integer mentionPage;

    public ChunkFigureRefEntity() {}

    public ChunkFigureRefEntity(UUID chunkId, String figureId, Integer mentionPage) {
        this.chunkId = chunkId;
        this.figureId = figureId;
        this.mentionPage = mentionPage;
    }

    public UUID getChunkId() { return chunkId; }
    public String getFigureId() { return figureId; }
    public Integer getMentionPage() { return mentionPage; }

    public static class PK implements Serializable {
        private UUID chunkId;
        private String figureId;

        public PK() {}
        public PK(UUID chunkId, String figureId) {
            this.chunkId = chunkId;
            this.figureId = figureId;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (!(o instanceof PK pk)) return false;
            return Objects.equals(chunkId, pk.chunkId) && Objects.equals(figureId, pk.figureId);
        }

        @Override
        public int hashCode() {
            return Objects.hash(chunkId, figureId);
        }
    }
}