import { Injectable } from "@nestjs/common";
import { InjectRepository } from "@nestjs/typeorm";
import { QueryFailedError, Repository } from "typeorm";
import { BaseRepository } from "@edr/api-common";
import { PaymentWebhookEvent } from "./entities/payment-webhook-event.entity";

const PG_UNIQUE_VIOLATION = "23505";

@Injectable()
export class WebhookEventsRepository extends BaseRepository<PaymentWebhookEvent> {
  constructor(
    @InjectRepository(PaymentWebhookEvent)
    repository: Repository<PaymentWebhookEvent>,
  ) {
    super(repository);
  }

  /**
   * Insert the event, relying on the unique (provider, external_event_id) index for dedupe.
   * Returns null when the event was already recorded (duplicate delivery / provider replay).
   */
  async createDeduped(
    data: Partial<PaymentWebhookEvent>,
  ): Promise<PaymentWebhookEvent | null> {
    try {
      return await this.create(data);
    } catch (err) {
      if (
        err instanceof QueryFailedError &&
        (err.driverError as { code?: string })?.code === PG_UNIQUE_VIOLATION
      ) {
        return null;
      }
      throw err;
    }
  }

  async markProcessed(id: string, processingError?: string): Promise<void> {
    await this.update(id, {
      processedAt: new Date(),
      processingError: processingError ?? null,
    });
  }
}