import DataLoader from 'dataloader';
import { CONTEXT, Inject, Injectable, Scope } from 'graphql-modules';
import { DBProvider } from '@modules/app-providers/db.provider.js';
import { BusinessTripAttendeesProvider } from '@modules/business-trips/providers/business-trips-attendees.provider.js';
import { DividendsProvider } from '@modules/dividends/providers/dividends.provider.js';
import { BalanceCancellationProvider } from '@modules/ledger/providers/balance-cancellation.provider.js';
import { UnbalancedBusinessesProvider } from '@modules/ledger/providers/unbalanced-businesses.provider.js';
import { EmployeesProvider } from '@modules/salaries/providers/employees.provider.js';
import { FundsProvider } from '@modules/salaries/providers/funds.provider.js';
import { sql } from '@pgtyped/runtime';
import { getCacheInstance } from '@shared/helpers';
import type {
  IDeleteBusinessQuery,
  IGetAllBusinessesQuery,
  IGetAllBusinessesResult,
  IGetBusinessesByIdsQuery,
  IInsertBusinessesParams,
  IInsertBusinessesQuery,
  IReplaceBusinessesQuery,
  IUpdateBusinessParams,
  IUpdateBusinessQuery,
} from '../types.js';
import { BusinessesGreenInvoiceMatcherProvider } from './businesses-green-invoice-match.provider.js';
import { TaxCategoriesProvider } from './tax-categories.provider.js';

const getBusinessesByIds = sql<IGetBusinessesByIdsQuery>`
    SELECT *
    FROM accounter_schema.businesses b
    INNER JOIN accounter_schema.financial_entities fe
      USING (id)
    WHERE b.id IN $$ids;`;

const getAllBusinesses = sql<IGetAllBusinessesQuery>`
    SELECT *
    FROM accounter_schema.businesses b
    INNER JOIN accounter_schema.financial_entities fe
      USING (id);`;

const updateBusiness = sql<IUpdateBusinessQuery>`
  UPDATE accounter_schema.businesses
  SET
  vat_number = COALESCE(
    $vatNumber,
    vat_number
  ),
  tax_siduri_number_2021 = COALESCE(
    $taxSiduriNumber2021,
    tax_siduri_number_2021
  ),
  password = COALESCE(
    $password,
    password
  ),
  username_vat_website = COALESCE(
    $usernameVatWebsite,
    username_vat_website
  ),
  website_login_screenshot = COALESCE(
    $websiteLoginScreenshot,
    website_login_screenshot
  ),
  nikuim = COALESCE(
    $nikuim,
    nikuim
  ),
  pinkas_social_security_2021 = COALESCE(
    $pinkasSocialSecurity2021,
    pinkas_social_security_2021
  ),
  hebrew_name = COALESCE(
    $hebrewName,
    hebrew_name
  ),
  tax_pinkas_number_2020 = COALESCE(
    $taxPinkasNumber2020,
    tax_pinkas_number_2020
  ),
  address = COALESCE(
    $address,
    address
  ),
  address_hebrew = COALESCE(
    $addressHebrew,
    address_hebrew
  ),
  wizcloud_token = COALESCE(
    $wizcloudToken,
    wizcloud_token
  ),
  wizcloud_company_id = COALESCE(
    $wizcloudCompany_id,
    wizcloud_company_id
  ),
  advance_tax_rate = COALESCE(
    $advanceTaxRate,
    advance_tax_rate
  ),
  email = COALESCE(
    $email,
    email
  ),
  website = COALESCE(
    $website,
    website
  ),
  phone_number = COALESCE(
    $phoneNumber,
    phone_number
  ),
  bank_account_bank_number = COALESCE(
    $bankAccountBankNumber,
    bank_account_bank_number
  ),
  bank_account_branch_number = COALESCE(
    $bankAccountBranchNumber,
    bank_account_branch_number
  ),
  bank_account_account_number = COALESCE(
    $bankAccountAccountNumber,
    bank_account_account_number
  ),
  "bank_account_IBAN"  = COALESCE(
    $bankAccountIBAN,
    "bank_account_IBAN"
  ),
  tax_nikuim_pinkas_number = COALESCE(
    $taxNikuimPinkasNumber,
    tax_nikuim_pinkas_number
  ),
  bank_account_swift = COALESCE(
    $bankAccountSwift,
    bank_account_swift
  ),
  vat_report_cadence = COALESCE(
    $vatReportCadence,
    vat_report_cadence
  ),
  contract = COALESCE(
    $contract,
    contract
  ),
  country = COALESCE(
    $country,
    country
  ),
  pinkas_social_security_2022 = COALESCE(
    $pinkasSocialSecurity2022,
    pinkas_social_security_2022
  ),
  tax_siduri_number_2022 = COALESCE(
    $taxSiduriNumber2022,
    tax_siduri_number_2022
  ),
  registration_date = COALESCE(
    $registrationDate,
    registration_date
  ),
  no_invoices_required = COALESCE(
    $noInvoicesRequired,
    no_invoices_required
  ),
  suggestion_data = COALESCE(
    $suggestionData,
    suggestion_data
  ),
  can_settle_with_receipt = COALESCE(
    $canSettleWithReceipt,
    can_settle_with_receipt
  ),
  exempt_dealer = COALESCE(
    $exemptDealer,
    exempt_dealer
  ),
  optional_vat = COALESCE(
    $optionalVat,
    optional_vat
  )
  WHERE
    id = $businessId
  RETURNING *;
`;

const insertBusinesses = sql<IInsertBusinessesQuery>`
  INSERT INTO accounter_schema.businesses (id, hebrew_name, address, email, website, phone_number, vat_number, exempt_dealer, suggestion_data, optional_vat, country)
  VALUES $$businesses(id, hebrewName, address, email, website, phoneNumber, governmentId, exemptDealer, suggestions, optionalVat, country)
  RETURNING *;`;

const deleteBusiness = sql<IDeleteBusinessQuery>`
  DELETE FROM accounter_schema.businesses
  WHERE id = $businessId
  RETURNING id;
`;

const replaceBusinesses = sql<IReplaceBusinessesQuery>`
  WITH ledger_debit1 AS (
    UPDATE accounter_schema.ledger_records
    SET debit_entity1 = $targetBusinessId
    WHERE debit_entity1 = $businessIdToReplace
    RETURNING id
  ),
  ledger_debit2 AS (
    UPDATE accounter_schema.ledger_records
    SET debit_entity2 = $targetBusinessId
    WHERE debit_entity2 = $businessIdToReplace
    RETURNING id
  ),
  ledger_credit1 AS (
    UPDATE accounter_schema.ledger_records
    SET credit_entity1 = $targetBusinessId
    WHERE credit_entity1 = $businessIdToReplace
    RETURNING id
  ),
  ledger_credit2 AS (
    UPDATE accounter_schema.ledger_records
    SET credit_entity2 = $targetBusinessId
    WHERE credit_entity2 = $businessIdToReplace
    RETURNING id
  ),
  documents_debtor AS (
    UPDATE accounter_schema.documents
    SET debtor_id = $targetBusinessId
    WHERE debtor_id = $businessIdToReplace
    RETURNING id
  ),
  documents_creditor AS (
    UPDATE accounter_schema.documents
    SET creditor_id = $targetBusinessId
    WHERE creditor_id = $businessIdToReplace
    RETURNING id
  ),
  employees AS (
    UPDATE accounter_schema.employees
    SET business_id = $targetBusinessId
    WHERE business_id = $businessIdToReplace
    RETURNING business_id
  ),
  funds AS (
    UPDATE accounter_schema.pension_funds
    SET id = $targetBusinessId
    WHERE id = $businessIdToReplace
    RETURNING id
  ),
  business_trips_attendees AS (
    UPDATE accounter_schema.business_trips_attendees
    SET attendee_business_id = $targetBusinessId
    WHERE attendee_business_id = $businessIdToReplace
    RETURNING business_trip_id
  ),
  business_trips_employee_payments AS (
    UPDATE accounter_schema.business_trips_employee_payments
    SET employee_business_id = $targetBusinessId
    WHERE employee_business_id = $businessIdToReplace
    RETURNING id
  ),
  charge_unbalanced_ledger_businesses AS (
    UPDATE accounter_schema.charge_unbalanced_ledger_businesses
    SET business_id = $targetBusinessId
    WHERE business_id = $businessIdToReplace
    RETURNING charge_id
  ),
  charge_balance_cancellation AS (
    UPDATE accounter_schema.charge_balance_cancellation
    SET business_id = $targetBusinessId
    WHERE business_id = $businessIdToReplace
    RETURNING charge_id
  ),
  dividends AS (
    UPDATE accounter_schema.dividends
    SET business_id = $targetBusinessId
    WHERE business_id = $businessIdToReplace
    RETURNING id
  ),
  corporate_tax_variables as (
    UPDATE accounter_schema.corporate_tax_variables
    SET corporate_id = $targetBusinessId
    WHERE corporate_id = $businessIdToReplace
    RETURNING date
  ),
  businesses_green_invoice_match as (
    UPDATE accounter_schema.businesses_green_invoice_match
    SET business_id = $targetBusinessId
    WHERE business_id = $businessIdToReplace
    RETURNING green_invoice_id
  )
  UPDATE accounter_schema.transactions
  SET business_id = $targetBusinessId
  WHERE business_id = $businessIdToReplace
  RETURNING id;
`;

@Injectable({
  scope: Scope.Operation,
  global: true,
})
export class BusinessesProvider {
  cache = getCacheInstance({
    stdTTL: 60 * 5,
  });

  constructor(
    @Inject(CONTEXT) private context: GraphQLModules.Context,
    private dbProvider: DBProvider,
    private taxCategoryProvider: TaxCategoriesProvider,
    private businessesGreenInvoiceMatcherProvider: BusinessesGreenInvoiceMatcherProvider,
    private employeesProvider: EmployeesProvider,
    private fundsProvider: FundsProvider,
    private dividendsProvider: DividendsProvider,
    private businessTripAttendeesProvider: BusinessTripAttendeesProvider,
    private balanceCancellationProvider: BalanceCancellationProvider,
    private unbalancedBusinessesProvider: UnbalancedBusinessesProvider,
  ) {}

  private async batchBusinessesByIds(ids: readonly string[]) {
    const uniqueIds = [...new Set(ids)];
    const businesses = await getBusinessesByIds.run(
      {
        ids: uniqueIds,
      },
      this.dbProvider,
    );
    return ids.map(id => businesses.find(fe => fe.id === id));
  }

  public getBusinessByIdLoader = new DataLoader(
    (ids: readonly string[]) => this.batchBusinessesByIds(ids),
    {
      cacheKeyFn: id => `business-${id}`,
      cacheMap: this.cache,
    },
  );

  public getAllBusinesses() {
    const data = this.cache.get<IGetAllBusinessesResult[]>('all-businesses');
    if (data) {
      return Promise.resolve(data);
    }
    return getAllBusinesses.run(undefined, this.dbProvider);
  }

  public async updateBusiness(
    params: Omit<IUpdateBusinessParams, 'businessId'> & { businessId: string },
  ) {
    if (params.businessId) await this.invalidateBusinessById(params.businessId);
    return updateBusiness.run(params, this.dbProvider);
  }

  public insertBusiness(business: IInsertBusinessesParams['businesses'][number]) {
    this.cache.delete('all-businesses');
    return insertBusinesses.run({ businesses: [business] }, this.dbProvider);
  }

  private async batchInsertBusinesses(
    newBusinesses: readonly IInsertBusinessesParams['businesses'][number][],
  ) {
    const businesses = await insertBusinesses.run(
      {
        businesses: newBusinesses,
      },
      this.dbProvider,
    );
    return newBusinesses.map(nb => businesses.find(b => b.id === nb.id) ?? null);
  }

  public insertBusinessesLoader = new DataLoader(
    (businesses: readonly IInsertBusinessesParams['businesses'][number][]) =>
      this.batchInsertBusinesses(businesses),
    {
      cache: false,
    },
  );

  public insertBusinesses(params: IInsertBusinessesParams) {
    this.cache.delete('all-businesses');
    return insertBusinesses.run(params, this.dbProvider);
  }

  public async invalidateBusinessById(businessId: string) {
    this.cache.delete('all-businesses');
    this.cache.delete(`business-${businessId}`);
  }

  public async deleteBusinessById(businessId: string) {
    this.invalidateBusinessById(businessId);

    // remove employee
    const employeePromise = this.employeesProvider.getEmployeesByIdLoader
      .load(businessId)
      .then(employee => {
        if (employee) throw new Error('Cannot delete business as it represent an employee');
      });

    // remove pension funds
    const fundPromise = this.fundsProvider.getAllFunds().then(funds => {
      const fund = funds.find(f => f.id === businessId);
      if (fund) throw new Error('Cannot delete business as it represent a pension/training fund');
    });

    // remove business trips attendees
    const tripsPromise = this.businessTripAttendeesProvider
      .getBusinessTripsByAttendeeId(businessId)
      .then(trips => {
        if (trips.length)
          throw new Error('Cannot delete business as it represent business trip attendee');
      });

    // remove from dividends
    const dividendsPromise = this.dividendsProvider.getDividendsByBusinessIdLoader
      .load(businessId)
      .then(dividends => {
        if (dividends.length)
          throw new Error('Cannot delete business as it represent dividends receiver');
      });

    // some validations before deleting the business
    await Promise.all([employeePromise, tripsPromise, fundPromise, dividendsPromise]);

    // remove from charge unbalanced ledger businesses
    const deleteUnbalancedChargesBusinesses =
      this.unbalancedBusinessesProvider.deleteChargeUnbalancedBusinessesByBusinessId(businessId);

    // remove from charge balance cancellation
    const deleteBalanceCancellation =
      this.balanceCancellationProvider.deleteBalanceCancellationByBusinessId(businessId);

    // remove from business green invoice match
    const deleteGreenInvoiceMatch =
      this.businessesGreenInvoiceMatcherProvider.deleteBusinessMatch(businessId);

    // TODO: remove when corporate: corporate-tax-variables
    // TODO: remove when owner: financial entities, charges, business-tax-category, ledger

    // TODO: should remove transactions, documents?

    // remove business-tax-category matches
    const deleteMatchingTaxCategory = this.taxCategoryProvider.deleteBusinessTaxCategory({
      businessId,
      ownerId: this.context.currentUser.userId,
    });

    await Promise.all([
      deleteUnbalancedChargesBusinesses,
      deleteBalanceCancellation,
      deleteGreenInvoiceMatch,
      deleteMatchingTaxCategory,
    ]);

    // delete businesses
    deleteBusiness.run({ businessId }, this.dbProvider);
  }

  public async replaceBusiness(
    targetBusinessId: string,
    businessIdToReplace: string,
    deleteBusiness: boolean = false,
  ) {
    const [businessToReplace, business] = await Promise.all([
      this.getBusinessByIdLoader.load(businessIdToReplace),
      this.getBusinessByIdLoader.load(targetBusinessId),
    ]);
    if (!businessToReplace) {
      throw new Error(`Business with id ${businessIdToReplace} not found`);
    }
    if (!business) {
      throw new Error(`Business with id ${targetBusinessId} not found`);
    }
    this.invalidateBusinessById(businessIdToReplace);
    this.invalidateBusinessById(targetBusinessId);

    // convert transactions, ledger, documents, employees, funds, business trips attendees, business trips employee payments, charge unbalanced ledger businesses, charge balance cancellation, dividends, corporate tax variables, businesses green invoice match
    await replaceBusinesses.run(
      {
        targetBusinessId,
        businessIdToReplace,
      },
      this.dbProvider,
    );

    // TODO: convert when owner: financial entities, charges, business-tax-category, ledger

    // TODO: should convert business tax category matches?

    // delete businesses
    if (deleteBusiness) {
      await this.deleteBusinessById(businessIdToReplace);
    }
  }

  public clearCache() {
    this.cache.clear();
  }
}