package com.lincfusion.udyamlinc.manualentry;

import jakarta.persistence.*;
import lombok.*;

import java.time.LocalDateTime;

/**
 * One upload. The audit anchor for every manually-sourced number in the system:
 * a supervisor asking "where did Bhopal's March milk rate come from" gets a
 * filename, a person and a timestamp, not a shrug.
 *
 * <p>A batch is staged as {@code PREVIEW} and writes nothing. Only
 * {@code COMMITTED} has touched {@code market_signal}. Uploading four hundred
 * rows and discovering the district column was misspelled afterwards is not a
 * recoverable situation, so nothing lands until someone has seen what will.
 */
@Entity
@Table(name = "manual_entry_batch", indexes = {
        @Index(name = "ix_manual_batch_status", columnList = "status"),
        @Index(name = "ix_manual_batch_uploaded", columnList = "uploadedAt"),
})
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class ManualEntryBatch {

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

    /** MARKET_SIGNAL | LOAN_RECORD — which template was uploaded. */
    @Column(nullable = false, length = 32)
    private String entryType;

    @Column(length = 260)
    private String filename;

    /**
     * {@code UPLOAD}, or the connector code the rows arrived through.
     *
     * <p>Kept on the batch rather than inferred from the filename, because once a
     * CBS connector runs nightly, "who put this number here" stops being answerable
     * by "someone uploaded a file" — and that question is the reason this table
     * exists.
     */
    @Column(length = 40)
    private String source;

    /** The username from the JWT. Never a display name — this is an audit field. */
    @Column(nullable = false, length = 64)
    private String uploadedBy;

    @Column(nullable = false)
    private LocalDateTime uploadedAt;

    /** PREVIEW | COMMITTED | DISCARDED. */
    @Column(nullable = false, length = 16)
    private String status;

    private LocalDateTime committedAt;

    @Column(length = 64)
    private String committedBy;

    private Integer rowsParsed;
    private Integer rowsAccepted;
    private Integer rowsRejected;

    /** How many accepted rows would replace a value that already exists. */
    private Integer rowsOverwriting;

    @Column(length = 500)
    private String note;

    @PrePersist
    void onCreate() {
        if (uploadedAt == null) uploadedAt = LocalDateTime.now();
        if (status == null) status = "PREVIEW";
        if (source == null) source = "UPLOAD";
    }
}