// services/voicePin/resetVoicePortalPin.js
// GET passcodeRules + PUT /v1/telephony/config/locations/{id}/voicePortal passcode

import { logger } from '../../utils/logger.js';
import { generatePin } from './generatePin.js';

const LOG_SCOPE = 'resetvppin:service';
const MAX_PUT_ATTEMPTS = 5;

/**
 * Reset a location's voice portal passcode.
 *
 * @param {string} locationId
 * @param {object} [opts]
 * @param {object} [opts.passcodeRules] cached rules from resolve step
 * @param {object} [opts.voicePortal] cached portal snapshot from resolve step
 * @param {object} [opts.webexClient] injectable client for tests
 * @returns {Promise<string>} new PIN (never log this value)
 */
export async function resetVoicePortalPin(locationId, opts = {}) {
  if (!locationId) {
    throw new Error('locationId is required');
  }

  const client = opts.webexClient || (await import('../../integrations/webex/WebexClient.js')).default;

  const passcodeRules = opts.passcodeRules
    || await client.request('GET', `telephony/config/locations/${locationId}/voicePortal/passcodeRules`);

  let lastError = null;
  for (let attempt = 0; attempt < MAX_PUT_ATTEMPTS; attempt += 1) {
    const passcode = generatePin({
      rules: passcodeRules,
      extension: opts.voicePortal?.extension,
    });

    const body = {
      passcode: {
        newPasscode: passcode,
        confirmPasscode: passcode,
      },
    };

    try {
      await client.request('PUT', `telephony/config/locations/${locationId}/voicePortal`, body);
      logger(LOG_SCOPE, `Voice portal PIN reset succeeded for location ${locationId}`, 'info');
      return passcode;
    } catch (err) {
      lastError = err;
      const status = err?.response?.status;
      if (status === 400 && attempt < MAX_PUT_ATTEMPTS - 1) {
        logger(LOG_SCOPE, `Voice portal PIN rejected for ${locationId} (attempt ${attempt + 1}), retrying`, 'warn');
        continue;
      }

      if (status === 400 || status === 422) {
        const existing = opts.voicePortal?.raw
          || await client.request('GET', `telephony/config/locations/${locationId}/voicePortal`).catch(() => null);
        if (existing) {
          const merged = {
            ...existing,
            passcode: body.passcode,
          };
          try {
            await client.request('PUT', `telephony/config/locations/${locationId}/voicePortal`, merged);
            logger(LOG_SCOPE, `Voice portal PIN reset succeeded (merged PUT) for location ${locationId}`, 'info');
            return passcode;
          } catch (mergeErr) {
            lastError = mergeErr;
          }
        }
      }

      throw lastError;
    }
  }

  throw lastError || new Error('Voice portal PIN reset failed');
}