'use strict';

const { AppParamError, AppError, AppAuthError } = require('../helpers/app_error'),
  { Errors, UserTypes } = require('../helpers/constants'),
  { User, InvoiceSetting } = require('../model'),
  { isNil } = require('lodash'),
  assert = require('assert'),
  path = require('path'),
  { getPuid: getPuidBase, checkUserClient } = require('../helpers/user_helper');

function getPuid(req, isObject) {
  const roles = [UserTypes.APP_ADM, UserTypes.OFFICER, UserTypes.PILOT, UserTypes.CLIENT, UserTypes.INSPECTOR];
  return getPuidBase(req, isObject, roles);
}

async function getInvoiceSettings_get(req, res) {
  const invoiceSettings = await InvoiceSetting.find({ userId: { $ne: null }, ...getPuid(req) });
  res.json(invoiceSettings);
}

async function createInvoiceSetting(req, body, file) {
  if (body.userId) await checkUserClient(body.userId, req);
  const logo = file?.filename ? path.basename(file.filename) : '';
  const newSetting = new InvoiceSetting({ ...body, logo: logo, byPuid: getPuid(req, false), createdBy: req.uid, updatedBy: req.uid });
  const invoiceSetting = await newSetting.save();
  return invoiceSetting;
}

async function createDefaultInvoiceSetting(req, userId) {
  if (userId) await checkUserClient(userId, req);

  const byPuid = getPuid(req, false);
  const applicator = await User.findOne({ _id: byPuid, kind: UserTypes.APP });
  if (!applicator) AppAuthError.throw(Errors.APPLICATOR_NOT_FOUND);

  //TODO: the default currency best to be loocked up from the applicator' country ISO 2 code.
  const defaultSetting = new InvoiceSetting({
    userId: userId ? userId : undefined, companyName: applicator.name, address: applicator.address ?? '',
    taxValue: 0, discount: 0, termOpts: [15, 30, 60], paymentTerm: 15, currency: 'USD', note: '', logo: '',
    byPuid, createdBy: req.uid, updatedBy: req.uid
  });
  const newSetting = new InvoiceSetting(defaultSetting);
  const invoiceSetting = await newSetting.save();

  return invoiceSetting;
}

async function createInvoiceSetting_post(req, res) {
  const invoiceSetting = await createInvoiceSetting(req, req.body, req.file);
  res.json(invoiceSetting);
}

function getBaseQueryInvoiceSettings(req) {
  const query = {};
  if (req.params.invoiceSettingId) query._id = req.params.invoiceSettingId;
  else if (req.params.clientId) query.userId = req.params.clientId;

  if (!Object.keys(query).length) AppParamError.throw(Errors.PARAMS_NOT_EMPTY);

  return query;
}

async function getInvoiceSettingDetail_get(req, res) {
  const invoiceSetting = await InvoiceSetting.findOne({ ...getBaseQueryInvoiceSettings(req), ...getPuid(req) });

  res.json(invoiceSetting);
}

async function getInvoiceSettingDefault_get(req, res) {
  const invoiceSetting = await InvoiceSetting.findOne({ userId: { $eq: null }, ...getPuid(req) });
  if (!invoiceSetting) {
    const invoiceSettingNew = await createDefaultInvoiceSetting(req, null);
    return res.json(invoiceSettingNew);
  }
  res.json(invoiceSetting);
}

async function updateInvoiceSetting_put(req, res) {
  if (req.body.userId) await checkUserClient(req.body.userId, req);

  const invoiceSetting = await InvoiceSetting.findOne({ ...getBaseQueryInvoiceSettings(req), ...getPuid(req) });
  if (!invoiceSetting) AppError.throw(Errors.INVOICE_SETTING_NOT_FOUND);

  for (const [key, value] of Object.entries(req.body)) {
    if (!isNil(value)) invoiceSetting[key] = value;
  }

  if (!isNil(req.file)) invoiceSetting.logo = (req.file?.filename ? path.basename(req.file.filename) : '');
  invoiceSetting.updatedBy = req.uid;
  await invoiceSetting.save();

  res.json(invoiceSetting);
}

async function deleteInvoiceSetting(req, res) {
  const invoiceSetting = await InvoiceSetting.findOneAndDelete({ ...getBaseQueryInvoiceSettings(req), ...getPuid(req) });
  res.json(invoiceSetting);
}

module.exports = {
  getInvoiceSettings_get, createInvoiceSetting_post, getInvoiceSettingDetail_get, getInvoiceSettingDefault_get, updateInvoiceSetting_put, deleteInvoiceSetting
};