import { selPool, updPool } from "#db/db.js";
import { DatabaseTransactionConnection, SerializableValue, sql } from "slonik";
import { v7 as uuidv7 } from "uuid";
import { cartService } from "./cart/cart-service.js";
import { ApiError } from "#exceptions/api-error.js";
import { z } from "zod";
import { DbSchema } from "#db/db-schema.js";
import { CustomFieldWithValue } from "#api/v_0.1.0/types/custom-fields-types.js";
import { generateRandomNumber } from "#utils/other-utils.js";
import { Cart } from "./cart/cart-types.js";
import { dayjs } from "#plugins/dayjs.js";
import { PaymentService } from "./payment/payment-service.js";
import { logger } from "#plugins/logger.js";
import { YooKassaProvider } from "./payment/yookassa-provider.js";
import { cActService } from "../activities/c-act-service.js";

type OrderUserData = Record<string, SerializableValue> & {
  firstName: string;
  lastName: string;
  patronymic: string | null;
  email: string;
  phone: string;
};

class OrdersService {
  async createOrder(
    tr: DatabaseTransactionConnection,
    {
      cart,
      userId,
      userData,
    }: {
      cart: Cart;
      userId?: string;
      userData: OrderUserData;
    },
  ) {
    const products = await Promise.all(
      cart.items.map(async (item) => {
        const p = await cartService.getProductById(item.productId);
        if (!p) {
          throw ApiError.BadRequest(
            "productNotFound",
            "Не найден товар из корзины",
          );
        }
        if (item.priceAtAddition !== p.price) {
          throw ApiError.BadRequest(
            "productPriceChanged",
            "Цена товара изменилась",
          );
        }
        return {
          ...p,
          quantity: item.quantity,
          activityRegId: item.activityRegId,
          peMemberId: item.peMemberId,
          cartItemId: item.cartItemId,
        };
      }),
    );

    // order
    const orderId = uuidv7();

    let orderNumber = generateRandomNumber();

    while (await this.checkOrderNumber(orderNumber)) {
      orderNumber = generateRandomNumber();
    }

    const totalAmount = products.reduce((acc, product) => {
      return acc + product.price * product.quantity;
    }, 0);

    const paymentDueDate = dayjs().add(1, "hour").toDate();

    await tr.query(sql.unsafe`
      insert into shop.orders (
        order_id, 
        order_number, 
        user_id, 
        status, 
        total_amount, 
        currency_code, 
        billing_data_snapshot,
        payment_due_date
        )
      values (
        ${orderId}, 
        ${orderNumber}, 
        ${userId || null}, 
        'PENDING_PAYMENT', 
        ${totalAmount}, 
        'RUB', 
        ${sql.jsonb(userData)},
        ${paymentDueDate.toISOString()}
      )
    `);

    for (const product of products) {
      await tr.query(sql.unsafe`
      insert into shop.order_items (
        order_item_id, 
        order_id, 
        product_id, 
        quantity, 
        unit_price, 
        total_price,
        activity_reg_id,
        pe_member_id,
        attributes_snapshot
        )
      values (
        ${uuidv7()}, 
        ${orderId}, 
        ${product.productId}, 
        ${product.quantity}, 
        ${product.price}, 
        ${product.price * product.quantity},
        ${"activityRegId" in product ? product.activityRegId : null},
        ${"peMemberId" in product ? product.peMemberId : null},
        ${sql.jsonb(product.attributes)}
      )
    `);

      // чтобы скрыть из корзины
      await tr.query(sql.unsafe`
          update shop.cart_items set order_id = ${orderId} where cart_item_id = ${product.cartItemId}
        `);
    }

    return {
      orderId,
      orderNumber,
      totalAmount,
      currencyCode: "RUB",
      billingDataSnapshot: userData,
      paymentDueDate,
      items: products,
    };
  }

  private async checkOrderNumber(orderNumber: string) {
    const order = await selPool.exists(sql.unsafe`
      select 1 from shop.orders where order_number = ${orderNumber}
    `);

    return !!order;
  }

  async getOrder(order: { orderId: string } | { orderNumber: string }) {
    return await selPool.maybeOne(sql.type(
      z.object({
        orderId: DbSchema.shop.orders.orderId,
        orderNumber: DbSchema.shop.orders.orderNumber,
        userId: DbSchema.shop.orders.userId,
        status: DbSchema.shop.orders.status,
        totalAmount: DbSchema.shop.orders.totalAmount,
        currencyCode: DbSchema.shop.orders.currencyCode,
        billingDataSnapshot: DbSchema.shop.orders.billingDataSnapshot,
        createdAt: DbSchema.shop.orders.createdAt,
        paymentDueDate: DbSchema.shop.orders.paymentDueDate,
        items: z.array(
          z.object({
            orderItemId: DbSchema.shop.orderItems.orderItemId,
            orderId: DbSchema.shop.orderItems.orderId,
            productId: DbSchema.shop.orderItems.productId,
            quantity: DbSchema.shop.orderItems.quantity,
            unitPrice: DbSchema.shop.orderItems.unitPrice,
            totalPrice: DbSchema.shop.orderItems.totalPrice,
            activityRegId: DbSchema.shop.orderItems.activityRegId.nullable(),
            peMemberId: DbSchema.shop.orderItems.peMemberId.nullable(),
            attributesSnapshot: DbSchema.shop.orderItems.attributesSnapshot,
            productName: DbSchema.shop.products.name,
            productType: DbSchema.shop.products.productType,
            stockQuantity: DbSchema.shop.products.stockQuantity,
            actPublicName: DbSchema.act.activities.publicName.nullable(),
            peMemberFields: CustomFieldWithValue.extend({
              userEfId: z.string().uuid(),
            }).nullable(),
          }),
        ),
      }),
    )`
    select 
        order_id as "orderId",
        order_number as "orderNumber",
        user_id as "userId",
        status,
        total_amount::float as "totalAmount",
        currency_code as "currencyCode",
        billing_data_snapshot as "billingDataSnapshot",
        created_at as "createdAt",
        payment_due_date as "paymentDueDate",
        items
    from 
      shop.orders_with_items
    where
        ${"orderId" in order ? sql.fragment`order_id = ${order.orderId}` : sql.fragment`order_number = ${order.orderNumber}`}
    `);
  }

  async cancelOrder(orderId: string) {
    await updPool.query(sql.unsafe`
      update shop.orders set status = 'CANCELLED' where order_id = ${orderId}
    `);
  }

  async getLastPaymentByOrderId(orderId: string) {
    return await selPool.maybeOne(sql.type(
      z.object({
        paymentId: DbSchema.shop.payments.paymentId,
        orderId: DbSchema.shop.payments.orderId,
        userId: DbSchema.shop.payments.userId,
        amount: DbSchema.shop.payments.amount,
        currencyCode: DbSchema.shop.payments.currencyCode,
        paymentMethod: DbSchema.shop.payments.paymentMethod,
        bank: DbSchema.shop.payments.bank,
        status: DbSchema.shop.payments.status,
        externalTransactionId: DbSchema.shop.payments.externalTransactionId,
        paymentGatewayDetails: DbSchema.shop.payments.paymentGatewayDetails,
        createdAt: DbSchema.shop.payments.createdAt,
        updatedAt: DbSchema.shop.payments.updatedAt,
        confirmation: DbSchema.shop.payments.confirmation,
      }),
    )`
      select 
        payment_id as "paymentId",
        order_id as "orderId",
        user_id as "userId",
        amount::float as "amount",
        currency_code as "currencyCode",
        payment_method as "paymentMethod",
        bank,
        status,
        external_transaction_id "externalTransactionId",
        payment_gateway_details "paymentGatewayDetails",
        created_at "createdAt",
        updated_at "updatedAt",
        confirmation
      from 
        shop.payments
      where
        order_id = ${orderId}
      order by 
        created_at desc
      limit 1;
    `);
  }

  async waitPandingOrder(orderId: string) {
    const order = await this.getOrder({ orderId });
    const payment = await this.getLastPaymentByOrderId(orderId);

    if (!order || !payment) {
      logger.error("Order or payment not found");
      return;
    }

    // Инициализация провайдера
    const yookassaProvider = new YooKassaProvider();
    // Инициализация сервиса с конкретным провайдером
    const paymentService = new PaymentService(yookassaProvider);

    const status = await paymentService.waitPayment(
      payment.paymentId,
      order.paymentDueDate,
    );
    if (status === "succeeded") {
      await updPool.query(sql.unsafe`
          update shop.orders
          set status = 'PAID'
          where order_id = ${orderId}
        `);

      await updPool.query(sql.unsafe`
          update shop.order_items
          set status = 'PAID'
          where order_id = ${orderId}
        `);

      // статус для регистраций
      for (const item of order.items) {
        if (
          item.productType === "ACTIVITY_REGISTRATION" ||
          item.productType === "ACTIVITY_PARTICIPANT"
        ) {
          if (!item.activityRegId) throw new Error("activityRegId not found");
          await cActService.updateActRegPaymentStatus(item.activityRegId);
        }
      }

      // удаляем из корзины
      await updPool.query(sql.unsafe`
          delete from shop.cart_items where order_id = ${orderId}
        `);
    }

    if (status === "canceled") {
      await updPool.query(sql.unsafe`
          update shop.orders
          set status = 'CANCELLED'
          where order_id = ${orderId}
        `);

      await updPool.query(sql.unsafe`
          update shop.order_items
          set status = 'CANCELLED'
          where order_id = ${orderId}
        `);

      // возвращаем в корзину
      await updPool.query(sql.unsafe`
          update shop.cart_items set order_id = null where order_id = ${orderId}
        `);
    }

    if (status === "failed") {
      await updPool.query(sql.unsafe`
          update shop.orders
          set status = 'FAILED'
          where order_id = ${orderId}
        `);

      // возвращаем в корзину
      await updPool.query(sql.unsafe`
          update shop.cart_items set order_id = null where order_id = ${orderId}
        `);
    }
  }

  async waitAllPendingOrders() {
    logger.info("Запуск проверки всех ожидающих заказов...");
    const orders = await this.getAllPendingOrders();
    for (const orderId of orders) {
      await this.waitPandingOrder(orderId);
    }
  }

  async getAllPendingOrders() {
    return await selPool.anyFirst(sql.type(
      z.object({
        orderId: z.string().uuid(),
      }),
    )`
      select order_id "orderId" from shop.orders where status = 'PENDING_PAYMENT'
    `);
  }

  async getOrders(userId: string) {
    return selPool.any(sql.type(
      z.object({
        orderId: DbSchema.shop.orders.orderId,
        orderNumber: DbSchema.shop.orders.orderNumber,
        userId: DbSchema.shop.orders.userId,
        status: DbSchema.shop.orders.status,
        totalAmount: DbSchema.shop.orders.totalAmount,
        currencyCode: DbSchema.shop.orders.currencyCode,
        billingDataSnapshot: DbSchema.shop.orders.billingDataSnapshot,
        createdAt: DbSchema.shop.orders.createdAt,
        paymentDueDate: DbSchema.shop.orders.paymentDueDate,
        items: z.array(
          z.object({
            orderItemId: DbSchema.shop.orderItems.orderItemId,
            orderId: DbSchema.shop.orderItems.orderId,
            productId: DbSchema.shop.orderItems.productId,
            quantity: DbSchema.shop.orderItems.quantity,
            unitPrice: DbSchema.shop.orderItems.unitPrice,
            totalPrice: DbSchema.shop.orderItems.totalPrice,
            activityRegId: DbSchema.shop.orderItems.activityRegId.nullable(),
            peMemberId: DbSchema.shop.orderItems.peMemberId.nullable(),
            attributesSnapshot: DbSchema.shop.orderItems.attributesSnapshot,
            productName: DbSchema.shop.products.name,
            productType: DbSchema.shop.products.productType,
            stockQuantity: DbSchema.shop.products.stockQuantity,
            actPublicName: DbSchema.act.activities.publicName.nullable(),
            peMemberFields: CustomFieldWithValue.extend({
              userEfId: z.string().uuid(),
            }).nullable(),
          }),
        ),
      }),
    )`
      select 
        order_id "orderId",
        order_number "orderNumber",
        user_id "userId",
        status,
        total_amount::float "totalAmount",
        currency_code "currencyCode",
        billing_data_snapshot "billingDataSnapshot",
        created_at "createdAt",
        payment_due_date "paymentDueDate",
        items
      from shop.orders_with_items
      where user_id = ${userId}
    `);
  }
}

export const ordersService = new OrdersService();