const axios = require('axios');
const config = require('../config');
const { withRetry } = require('../utils/retry');
const logger = require('../utils/logger');

const RETRY_OPTS = { retries: 2, initialDelayMs: 300 };

async function getMDMToken() {
  logger.debug('Requesting Workspace ONE token');

  const response = await withRetry(
    () =>
      axios.post(
        config.mdm.tokenUrl,
        new URLSearchParams({
          grant_type: 'client_credentials',
          client_id: config.mdm.clientId,
          client_secret: config.mdm.clientSecret,
        }),
        {
          headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
          timeout: 15000,
        }
      ),
    RETRY_OPTS
  );

  logger.info('MDM token acquired');
  return response.data.access_token;
}

async function getMDMDevices(storeNumber) {
  const storePadded = String(storeNumber).padStart(6, '0');
  logger.info('Fetching MDM devices', { storePadded });

  try {
    const token = await getMDMToken();

    const response = await withRetry(
      () =>
        axios.get(`${config.mdm.baseUrl}/api/mdm/devices/search`, {
          params: { user: storePadded },
          headers: {
            Authorization: `Bearer ${token}`,
            'aw-tenant-code': config.mdm.tenantCode,
            Accept: 'application/json',
          },
          timeout: 20000,
        }),
      RETRY_OPTS
    );

    const devices = response.data.Devices || [];
    logger.info('Fetched MDM devices', { count: devices.length });
    return devices;
  } catch (err) {
    logger.error('MDM devices fetch failed', { error: err.message });
    return [];
  }
}

module.exports = { getMDMDevices };