import { getClientWithToken } from '../apollo/client';
import * as GQL from '../types';
import { BaseService } from './base';
import { OrdersService } from './orders';
import { type VariablesOf } from '@graphql-typed-document-node/core';
import dayjs from 'dayjs';

export class SubscriptionsService extends BaseService {
  async createSubscription(variables: VariablesOf<typeof GQL.CreateSubscriptionDocument>) {
    await this.checkIsBanned();

    const { mutate } = await getClientWithToken();

    const mutationResult = await mutate({
      mutation: GQL.CreateSubscriptionDocument,
      variables,
    });

    const error = mutationResult.errors?.at(0);
    if (error) throw new Error(error.message);

    return mutationResult.data;
  }

  async createSubscriptionHistory(
    variables: VariablesOf<typeof GQL.CreateSubscriptionHistoryDocument>,
  ) {
    await this.checkIsBanned();

    const { mutate } = await getClientWithToken();

    const mutationResult = await mutate({
      mutation: GQL.CreateSubscriptionHistoryDocument,
      variables,
    });

    const error = mutationResult.errors?.at(0);
    if (error) throw new Error(error.message);

    return mutationResult.data;
  }

  async getSubscription(variables: VariablesOf<typeof GQL.GetSubscriptionDocument>) {
    await this.checkIsBanned();

    const { query } = await getClientWithToken();

    const result = await query({
      query: GQL.GetSubscriptionDocument,
      variables,
    });

    const subscription = result.data.subscriptions.at(0);

    const { maxOrdersPerMonth, remainingOrdersCount } = await this.getRemainingOrdersCount();

    return { maxOrdersPerMonth, remainingOrdersCount, subscription };
  }

  async getSubscriptionHistory(variables: VariablesOf<typeof GQL.GetSubscriptionHistoryDocument>) {
    await this.checkIsBanned();

    const { query } = await getClientWithToken();

    const result = await query({
      query: GQL.GetSubscriptionHistoryDocument,
      variables,
    });

    const subscriptionHistories = result.data.subscriptionHistories;

    return { subscriptionHistories };
  }

  async getSubscriptionPrices(variables?: VariablesOf<typeof GQL.GetSubscriptionPricesDocument>) {
    await this.checkIsBanned();

    const { query } = await getClientWithToken();

    const result = await query({
      query: GQL.GetSubscriptionPricesDocument,
      variables,
    });

    return result.data;
  }

  async getSubscriptionSettings() {
    await this.checkIsBanned();

    const { query } = await getClientWithToken();

    const result = await query({
      query: GQL.GetSubscriptionSettingsDocument,
    });

    return result.data;
  }

  async updateSubscription(variables: VariablesOf<typeof GQL.UpdateSubscriptionDocument>) {
    await this.checkIsBanned();

    const { mutate } = await getClientWithToken();

    const mutationResult = await mutate({
      mutation: GQL.UpdateSubscriptionDocument,
      variables,
    });

    const error = mutationResult.errors?.at(0);
    if (error) throw new Error(error.message);

    return mutationResult.data;
  }

  async updateSubscriptionHistory(
    variables: VariablesOf<typeof GQL.UpdateSubscriptionHistoryDocument>,
  ) {
    await this.checkIsBanned();

    const { mutate } = await getClientWithToken();

    const mutationResult = await mutate({
      mutation: GQL.UpdateSubscriptionHistoryDocument,
      variables,
    });

    const error = mutationResult.errors?.at(0);
    if (error) throw new Error(error.message);

    return mutationResult.data;
  }

  private async getRemainingOrdersCount() {
    const ordersService = new OrdersService(this._user);

    const now = dayjs();

    const { orders } = await ordersService.getOrders({
      filters: {
        datetime_end: {
          lte: now.endOf('month').toISOString(),
        },
        datetime_start: {
          gte: now.startOf('month').toISOString(),
        },

        state: {
          eq: GQL.Enum_Order_State.Completed,
        },
      },
    });

    const { subscriptionSetting } = await this.getSubscriptionSettings();

    if (!subscriptionSetting) throw new Error('Subscription setting not found');

    const { maxOrdersPerMonth } = subscriptionSetting;

    const remainingOrdersCount = maxOrdersPerMonth - (orders?.length ?? 0);

    return { maxOrdersPerMonth, remainingOrdersCount };
  }
}