import { Injectable, Logger } from '@nestjs/common';
import { Prisma, PrismaService, Tx } from '../prisma/prisma.service';
import { ActorType } from '../generated/prisma/client';

export type AuditEntry = {
  /** Null for actions that are not about one venue. */
  venueId: string | null;
  actor: { type: ActorType; id: string | null };
  action: string;
  details?: Prisma.InputJsonObject;
};

@Injectable()
export class AuditService {
  private readonly logger = new Logger(AuditService.name);

  constructor(private prisma: PrismaService) {}

  /** Records [entry]; inside [tx] it is part of that change, otherwise a failure is only logged. */
  async log(entry: AuditEntry, tx?: Tx) {
    const data = {
      venueId: entry.venueId,
      actorType: entry.actor.type,
      actorId: entry.actor.id,
      action: entry.action,
      details: entry.details,
    };
    if (tx) {
      await tx.auditLog.create({ data });
      return;
    }
    try {
      await this.prisma.auditLog.create({ data });
    } catch (error) {
      this.logger.error(`Failed to write audit log: ${error}`);
    }
  }
}