package com.mydreamjob.offer;

import jakarta.persistence.*;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.time.LocalDateTime;

/**
 * Offer 提醒记录
 *
 * <p>reminder_type：EXPIRING_3_DAYS / EXPIRING_1_DAY（定时任务）、MANUAL（企业手动）。
 * status：SCHEDULED / SENT / SKIPPED。
 * 唯一约束 (offer_id, reminder_type) 保证同一类型提醒只创建一次。
 */
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
@Entity
@Table(name = "offer_reminders",
       uniqueConstraints = @UniqueConstraint(name = "uk_offer_reminders",
               columnNames = {"offer_id", "reminder_type"}))
public class OfferReminder {

    public static final String TYPE_EXPIRING_3_DAYS = "EXPIRING_3_DAYS";
    public static final String TYPE_EXPIRING_1_DAY = "EXPIRING_1_DAY";
    public static final String TYPE_MANUAL = "MANUAL";

    public static final String STATUS_SCHEDULED = "SCHEDULED";
    public static final String STATUS_SENT = "SENT";
    public static final String STATUS_SKIPPED = "SKIPPED";

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

    @Column(name = "offer_id", nullable = false)
    private Long offerId;

    @Column(name = "reminder_type", nullable = false, length = 20)
    private String reminderType;

    @Column(name = "remind_at", nullable = false)
    private LocalDateTime remindAt;

    @Column(name = "sent_at")
    private LocalDateTime sentAt;

    @Column(name = "status", nullable = false, length = 20)
    @Builder.Default
    private String status = "SCHEDULED";

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

    @PrePersist
    void prePersist() {
        if (createdAt == null) createdAt = LocalDateTime.now();
        if (status == null) status = STATUS_SCHEDULED;
    }
}