// services/callReport/resolveTarget.js
// Parse and resolve /callreport targets: store, user email, or phone number.

import webex from '../../integrations/webex/WebexClient.js';
import { logger } from '../../utils/logger.js';
import { DISPLAY_TIMEZONE } from '../../utils/time.js';
import {
  resolveNumberAssignment,
  resolvePersonLocation,
} from '../callTest/locationResolver.js';
import { buildScopedCallFilter } from './filterCallsByTarget.js';
import {
  getDectNetworksForPerson,
  getPersonDetails,
  getPersonIdByEmail,
} from '../phoneService.js';
import { resolveStoreForCallReport } from './storeContext.js';
import { parseCallReportTarget, parseStoreNumFromLocationName } from './parseTarget.js';

const LOG_SCOPE = 'callreport:target';

async function resolveLocationDetails(locationId) {
  if (!locationId) return null;
  return webex.request('GET', `telephony/config/locations/${locationId}`).catch(() => null);
}

async function resolveTimezone({ personId, locationId, locationDetails }) {
  let timeZone = DISPLAY_TIMEZONE;
  try {
    const profile = personId
      ? await webex.request('GET', `telephony/config/people/${personId}`).catch(() => null)
      : null;
    const location = locationDetails || (locationId
      ? await resolveLocationDetails(locationId)
      : null);
    timeZone = profile?.timeZone || location?.timeZone || location?.timezone || timeZone;
  } catch (err) {
    logger(LOG_SCOPE, `Timezone lookup failed: ${err.message}`, 'debug');
  }
  return timeZone;
}

function buildStoreContextFromLocation({
  kind,
  label,
  storeNum,
  personId,
  locationId,
  locationName,
  dialNumber,
  timeZone,
  email,
  filter,
}) {
  return {
    kind,
    label,
    storeNum,
    personId: personId || null,
    locationId,
    locationName,
    dialNumber,
    timeZone,
    email: email || null,
    filter: filter || null,
  };
}

async function resolveStoreTarget(parsed) {
  const store = await resolveStoreForCallReport(parsed.storeNum);
  return buildStoreContextFromLocation({
    kind: 'store',
    label: `Store ${store.storeNum}`,
    storeNum: store.storeNum,
    personId: store.personId,
    locationId: store.locationId,
    locationName: store.locationName,
    dialNumber: store.dialNumber,
    timeZone: store.timeZone,
    email: store.email,
    filter: null,
  });
}

async function resolveNumberTarget(parsed) {
  const assignment = await resolveNumberAssignment(parsed.phoneNumber);
  if (!assignment?.locationId) {
    throw new Error(`No Webex location found for number ${parsed.phoneNumber}`);
  }

  const locationDetails = await resolveLocationDetails(assignment.locationId);
  const dialNumber = locationDetails?.callingLineId?.phoneNumber
    || locationDetails?.phoneNumber
    || null;
  const storeNum = parseStoreNumFromLocationName(assignment.locationName);
  const timeZone = await resolveTimezone({
    personId: assignment.owner?.id,
    locationId: assignment.locationId,
    locationDetails,
  });

  const filter = buildScopedCallFilter({
    kind: 'number',
    phoneNumber: parsed.phoneNumber,
    personId: assignment.owner?.id || null,
    extension: assignment.extension,
    locationMain: dialNumber,
  });

  return buildStoreContextFromLocation({
    kind: 'number',
    label: parsed.phoneNumber,
    storeNum,
    personId: assignment.owner?.id || null,
    locationId: assignment.locationId,
    locationName: assignment.locationName,
    dialNumber,
    timeZone,
    email: null,
    filter,
  });
}

async function resolveUserTarget(parsed) {
  const personId = await getPersonIdByEmail(parsed.email);
  if (!personId) {
    throw new Error(`No Webex person found for ${parsed.email}`);
  }

  const person = await getPersonDetails(personId);
  let locationId = null;
  let locationName = null;
  let ownedNumbers = [];

  const personLoc = await resolvePersonLocation(personId);
  if (personLoc) {
    locationId = personLoc.locationId;
    locationName = personLoc.locationName;
    ownedNumbers = personLoc.ownedNumbers;
  } else {
    const dectNets = await getDectNetworksForPerson(personId);
    if (dectNets.length > 0) {
      locationId = dectNets[0].locationId && dectNets[0].locationId !== '—'
        ? dectNets[0].locationId
        : null;
      locationName = dectNets[0].locationName && dectNets[0].locationName !== '—'
        ? dectNets[0].locationName
        : null;
    }
  }

  if (!locationId || !locationName) {
    throw new Error(`No Webex Calling location found for ${parsed.email}`);
  }

  const locationDetails = await resolveLocationDetails(locationId);
  const dialNumber = locationDetails?.callingLineId?.phoneNumber
    || locationDetails?.phoneNumber
    || null;
  const storeNum = parseStoreNumFromLocationName(locationName);
  const timeZone = await resolveTimezone({ personId, locationId, locationDetails });

  const filter = buildScopedCallFilter({
    kind: 'user',
    email: parsed.email,
    personId,
    person,
    ownedNumbers,
    locationMain: dialNumber,
  });

  if (ownedNumbers.length > 1) {
    logger(
      LOG_SCOPE,
      `User ${parsed.email} has numbers at multiple locations; using ${locationName}`,
      'warn',
    );
  }

  return buildStoreContextFromLocation({
    kind: 'user',
    label: parsed.email,
    storeNum,
    personId,
    locationId,
    locationName,
    dialNumber,
    timeZone,
    email: parsed.email,
    filter,
  });
}

/**
 * @param {string} token raw first argument
 * @returns {Promise<object>} unified call report target context
 */
export async function resolveCallReportTarget(token) {
  const parsed = parseCallReportTarget(token);
  if (!parsed) {
    throw new Error('Invalid target — use a store number (2–4 digits), email, or phone number');
  }

  if (parsed.kind === 'store') return resolveStoreTarget(parsed);
  if (parsed.kind === 'number') return resolveNumberTarget(parsed);
  return resolveUserTarget(parsed);
}