import { Injectable } from "@nestjs/common";
import type { Request } from "express";
import { PrismaService } from "../../prisma/prisma.service";

@Injectable()
export class AuditService {
  constructor(private readonly prisma: PrismaService) {}

  async log(action: string, req?: Request, options?: { tenantId?: string; actorUserId?: string; entityType?: string; entityId?: string; metadata?: any }) {
    const ip =
      (req?.headers?.["x-forwarded-for"] as string | undefined)?.split(",")[0]?.trim() ??
      (req as any)?.ip ??
      undefined;
    const userAgent = (req?.headers?.["user-agent"] as string | undefined) ?? undefined;

    await this.prisma.auditLog.create({
      data: {
        action,
        tenantId: options?.tenantId,
        actorUserId: options?.actorUserId,
        entityType: options?.entityType,
        entityId: options?.entityId,
        metadata: options?.metadata,
        ip,
        userAgent
      }
    });
  }
}