import { Inject, Injectable } from '@nestjs/common';
import { GetMatchedTransactionsFilter, MatchedTransactionPOJO, MatchedTransactionsPOJO } from '../types';
import { GetMatchedTransactionsByType } from './GetMatchedTransactionsByType';
import { GetMatchedTransactionExpensesTransformer } from './GetMatchedTransactionExpensesTransformer';
import { TransformerInjectable } from '@/modules/Transformer/TransformerInjectable.service';
import { Expense } from '@/modules/Expenses/models/Expense.model';
import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
import { Knex } from 'knex';
import { TENANCY_DB_CONNECTION } from '@/modules/Tenancy/TenancyDB/TenancyDB.constants';
import { initialize } from 'objection';

@Injectable()
export class GetMatchedTransactionsByExpenses extends GetMatchedTransactionsByType {
  constructor(
    protected readonly transformer: TransformerInjectable,

    @Inject(Expense.name)
    protected readonly expenseModel: TenantModelProxy<typeof Expense>,

    @Inject(TENANCY_DB_CONNECTION)
    private readonly tenantDb: () => Knex,

    @Inject('TENANT_MODELS_INIT')
    private readonly tenantModelsInit: () => Promise<boolean>,
    
  ) {
    super();
  }

  /**
   * Retrieves the matched transactions of expenses.
   * @param {GetMatchedTransactionsFilter} filter
   * @returns
   */
  async getMatchedTransactions(
    filter: GetMatchedTransactionsFilter,
  ): Promise<MatchedTransactionsPOJO> {
    // await this.tenantModelsInit();
    // Retrieve the expense matches.
    const expenses = await this.expenseModel()
      .query()
      .onBuild((query) => {
        // Filter out the not matched to bank transactions.
        query.withGraphJoined('matchedBankTransaction');
        query.whereNull('matchedBankTransaction.id');

        // Filter the published onyl
        query.modify('filterByPublished');

        if (filter.fromDate) {
          query.where('paymentDate', '>=', filter.fromDate);
        }
        if (filter.toDate) {
          query.where('paymentDate', '<=', filter.toDate);
        }
        if (filter.minAmount) {
          query.where('totalAmount', '>=', filter.minAmount);
        }
        if (filter.maxAmount) {
          query.where('totalAmount', '<=', filter.maxAmount);
        }
        query.orderBy('paymentDate', 'DESC');
      });

    return this.transformer.transform(
      expenses,
      new GetMatchedTransactionExpensesTransformer(),
    );
  }

  /**
   * Retrieves the given matched expense transaction.
   * @param {number} tenantId
   * @param {number} transactionId
   * @returns {GetMatchedTransactionExpensesTransformer-}
   */
  public async getMatchedTransaction(
    transactionId: number,
  ): Promise<MatchedTransactionPOJO> {
    const expense = await this.expenseModel()
      .query()
      .findById(transactionId)
      .throwIfNotFound();

    return this.transformer.transform(
      expense,
      new GetMatchedTransactionExpensesTransformer(),
    );
  }
}