/*
 * File: src/main/java/purchase/model/Purchase.java
 * Description: This model represents a Purchase entity in the purchasing process. Each Purchase
 * contains information about the supplier, date, status, remarks, and tenant details. It maintains
 * a relationship with a list of PurchaseItem entities, capturing the details of each item in the
 * purchase. The model includes metadata for tracking creation, updates, and deletions.
*/

package com.nebula.erp.purchase.model;

import com.fasterxml.jackson.annotation.JsonIgnore;
import jakarta.persistence.*;
import com.fasterxml.jackson.annotation.JsonManagedReference;
import lombok.Data;
import lombok.Getter;
import lombok.Setter;
import lombok.EqualsAndHashCode;
import lombok.ToString;

import java.time.Instant;
import java.time.LocalDateTime;
import java.util.List;

@Getter
@Setter
@Entity
@Table(name = "purchase")
@ToString(exclude = { "purchase_items", "supplier" })
@EqualsAndHashCode(onlyExplicitlyIncluded = true)
public class Purchase {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @EqualsAndHashCode.Include
    private Long id;

    @ManyToOne
    @JoinColumn(name = "supplier_id", nullable = false)
    @JsonIgnore
    private Supplier supplier;

    @Column(nullable = false)
    private Instant date;

    @Column(nullable = false)
    private String status;

    @Column(nullable = false)
    private String remarks;

    @Column(nullable = false)
    private String created_by;

    @Column(nullable = false)
    private String tenant;

    @OneToMany(mappedBy = "purchase_order", cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.LAZY)
    @JsonManagedReference
    private List<PurchaseItem> purchase_items;

    @Column(nullable = false, updatable = false)
    private Instant created_at;

    @Column(nullable = false)
    private Instant updated_at;

    private Instant deleted_at;

    public Supplier getSupplier() {
        return supplier;
    }

    @PrePersist
    protected void onCreate() {
        Instant now = Instant.now();
        created_at = now;
        updated_at = now;
    }

    @PreUpdate
    protected void onUpdate() {
        updated_at = Instant.now();
    }
}