package com.saas.shared.audit.entity;

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

import java.time.LocalDateTime;

/**
 * Audit Log Entity - Tracks all system operations
 * 
 * Stored in admin database (saas_db)
 * Records user actions, entity changes, and metadata
 */
@Entity
@Table(name = "audit_logs", indexes = {
    @Index(name = "idx_user_id", columnList = "user_id"),
    @Index(name = "idx_tenant_id", columnList = "tenant_id"),
    @Index(name = "idx_action", columnList = "action"),
    @Index(name = "idx_entity_type", columnList = "entity_type"),
    @Index(name = "idx_created_at", columnList = "created_at")
})
@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class AuditLog {

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

    @Column(name = "user_id", length = 255)
    private String userId;

    @Column(name = "action", nullable = false, length = 50)
    private String action;

    @Column(name = "entity_type", nullable = false, length = 100)
    private String entityType;

    @Column(name = "entity_id")
    private Long entityId;

    @Column(name = "tenant_id", length = 100)
    private String tenantId;

    @Column(name = "old_values", columnDefinition = "TEXT")
    private String oldValues;

    @Column(name = "new_values", columnDefinition = "TEXT")
    private String newValues;

    @Column(name = "ip_address", length = 45)
    private String ipAddress;

    @Column(name = "user_agent", columnDefinition = "TEXT")
    private String userAgent;

    @Column(name = "description", columnDefinition = "TEXT")
    private String description;

    @Column(name = "metadata", columnDefinition = "TEXT")
    private String metadata;

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

    @Column(name = "timestamp", nullable = false, updatable = false)
    @Builder.Default
    private LocalDateTime timestamp = LocalDateTime.now();

    @PrePersist
    void onCreate() {
        if (createdAt == null) {
            createdAt = LocalDateTime.now();
        }
        if (timestamp == null) {
            timestamp = createdAt;
        }
    }
}