import type {AppTransaction} from './types';
import {RnIapConsole} from './utils/debug';

/**
 * Parse the string payload returned by the native getAppTransactionIOS call into
 * a strongly typed AppTransaction object. Returns null when the payload cannot
 * be safely converted.
 */
export const parseAppTransactionPayload = (
  payload: string,
): AppTransaction | null => {
  try {
    const raw = JSON.parse(payload) as Record<string, unknown>;
    if (raw == null || typeof raw !== 'object') {
      return null;
    }

    const appId = Number(raw.appId);
    const appVersionId = Number(raw.appVersionId);
    const originalPurchaseDate = Number(raw.originalPurchaseDate);
    const signedDate = Number(raw.signedDate);

    if (
      Number.isNaN(appId) ||
      Number.isNaN(appVersionId) ||
      Number.isNaN(originalPurchaseDate) ||
      Number.isNaN(signedDate)
    ) {
      return null;
    }

    const preorderDateRaw = raw.preorderDate;
    const preorderDate =
      preorderDateRaw == null ? null : Number(preorderDateRaw);

    return {
      appId,
      appTransactionId:
        typeof raw.appTransactionId === 'string' ? raw.appTransactionId : null,
      appVersion: typeof raw.appVersion === 'string' ? raw.appVersion : '',
      appVersionId,
      bundleId: typeof raw.bundleId === 'string' ? raw.bundleId : '',
      deviceVerification:
        typeof raw.deviceVerification === 'string'
          ? raw.deviceVerification
          : '',
      deviceVerificationNonce:
        typeof raw.deviceVerificationNonce === 'string'
          ? raw.deviceVerificationNonce
          : '',
      environment: typeof raw.environment === 'string' ? raw.environment : '',
      originalAppVersion:
        typeof raw.originalAppVersion === 'string'
          ? raw.originalAppVersion
          : '',
      originalPlatform:
        typeof raw.originalPlatform === 'string' ? raw.originalPlatform : null,
      originalPurchaseDate,
      preorderDate:
        preorderDate != null && !Number.isNaN(preorderDate)
          ? preorderDate
          : null,
      signedDate,
    };
  } catch (error) {
    RnIapConsole.warn(
      '[parseAppTransactionPayload] Failed to parse payload',
      error,
    );
    return null;
  }
};