import {
  DELETE_LINES_BY_MANIFEST,
  GET_MANIFEST_HEADER,
  ORDER_TYPE,
  UPDATE_MANIFEST,
} from '../../sql/manifestDoc.js';
import request from '../request.js';
import resolveSelectedCompanyAccess from '../companyuser/resolveSelectedCompanyAccess.js';
import taxEnsure from '../tax/ensure.js';
import { insertLines, normalizeLines, parseDate } from '../manifestLines.js';
import { assertCustomerEntity, loadDoc, shapeSummary } from '../manifestDoc/helpers.js';

export default function update(pool) {
  const access = resolveSelectedCompanyAccess(pool);
  const ensureTax = taxEnsure(pool);

  /**
   * Updates an order's header and/or lines.
   *
   * @param {number} googleAuthId - The id of the Google auth user.
   * @param {number} id - The id of the order to update.
   * @param {object} patch - The update patch.
   * @param {string} [patch.number] - The new order number.
   * @param {string} [patch.date] - The new order date.
   * @param {number} [patch.entityId] - The new customer entity id.
   * @param {string} [patch.externalNumber] - The new external (customer) reference number.
   * @param {Array<object>} [patch.lines] - The new order lines.
   * @returns {Promise<{id: number, number: string, type: string, entityId: number|null, externalNumber: string|null, date: string, lines: Array<object>}>} The updated order.
   * @throws {Error} If the order is not found.
   *
   * @example
   * const order = await store.order.update(42, 5, { number: 'B-2026-002', lines: [...] });
   * // => { id, number, type, entityId, date, lines: [...] }
   */
  return async (googleAuthId, id, patch = {}) => {
    if (!Number.isFinite(id)) {
      throw new Error('Order not found');
    }

    const hasNumber = Object.prototype.hasOwnProperty.call(patch, 'number');
    const hasDate = Object.prototype.hasOwnProperty.call(patch, 'date');
    const hasEntityId = Object.prototype.hasOwnProperty.call(patch, 'entityId');
    const hasExternalNumber = Object.prototype.hasOwnProperty.call(patch, 'externalNumber');
    const hasLines = Object.prototype.hasOwnProperty.call(patch, 'lines');

    if (!hasNumber && !hasDate && !hasEntityId && !hasExternalNumber && !hasLines) {
      throw new Error('Invalid order');
    }

    let normalizedLines;
    if (hasLines) {
      normalizedLines = normalizeLines(patch.lines);
    }

    const { companyId } = await access(googleAuthId);

    const tx = pool.transaction();
    await tx.begin();

    try {
      const existing = await request(pool, tx)
        .input('id', id)
        .input('companyId', companyId)
        .input('type', ORDER_TYPE)
        .query(GET_MANIFEST_HEADER);

      const current = existing.recordset[0];
      if (!current) {
        throw new Error('Order not found');
      }

      const summary = shapeSummary(ORDER_TYPE, current);

      let number = summary.number;
      if (hasNumber) {
        number = patch.number?.trim?.() ? patch.number.trim() : null;
        if (!number) {
          throw new Error('Invalid order');
        }
      }

      let date = summary.date;
      if (hasDate) {
        date = parseDate(patch.date);
        if (!date) {
          throw new Error('Invalid order');
        }
      }

      let entityId = summary.entityId;
      if (hasEntityId) {
        entityId = await assertCustomerEntity(
          pool,
          tx,
          companyId,
          patch.entityId ?? null,
        );
      }

      let externalNumber = summary.externalNumber;
      if (hasExternalNumber) {
        externalNumber = patch.externalNumber?.trim?.()
          ? patch.externalNumber.trim()
          : null;
      }

      await request(pool, tx)
        .input('id', id)
        .input('companyId', companyId)
        .input('type', ORDER_TYPE)
        .input('number', number)
        .input('entityId', entityId)
        .input('externalNumber', externalNumber)
        .input('date', date)
        .query(UPDATE_MANIFEST);

      if (hasLines) {
        await request(pool, tx)
          .input('manifestId', id)
          .query(DELETE_LINES_BY_MANIFEST);

        await insertLines(pool, tx, {
          manifestId: id,
          lines: normalizedLines,
          ensureTax,
        });
      }

      const doc = await loadDoc(pool, tx, { type: ORDER_TYPE, companyId, id });
      await tx.commit();
      return doc;
    } catch (err) {
      try {
        await tx.rollback();
      } catch {
        // ignore
      }
      throw err;
    }
  };
}