import { Inject, Injectable } from '@nestjs/common'
import {
  Pothos,
  PothosRef,
  PothosSchema,
  SchemaBuilderToken,
} from '@smatch-corp/nestjs-pothos'
import { Builder } from '../Graphql/graphql.builder'
import { PrismaService } from '../Prisma/prisma.service'
import { OrderStatus } from '@prisma/client'
import { DateTimeUtils } from '../common/utils/datetime.utils'
import { PayosService } from '../Payos/payos.service'
@Injectable()
export class OrderSchema extends PothosSchema {
  constructor(
    @Inject(SchemaBuilderToken) private readonly builder: Builder,
    private readonly prisma: PrismaService,
    private readonly payosService: PayosService,
  ) {
    super()
  }

  // Types section
  @PothosRef()
  order() {
    return this.builder.prismaObject('Order', {
      description: 'An order in the system.',
      fields: (t) => ({
        id: t.exposeID('id', {
          description: 'The ID of the order.',
        }),
        userId: t.exposeID('userId', {
          description: 'The ID of the user.',
        }),
        serviceId: t.exposeID('serviceId', {
          description: 'The ID of the service.',
        }),
        status: t.expose('status', {
          type: OrderStatus,
          description: 'The status of the order.',
        }),
        total: t.exposeInt('total', {
          description: 'The total price of the order.',
        }),
        scheduleId: t.exposeID('scheduleId', {
          description: 'The ID of the schedule.',
        }),
        schedule: t.relation('schedule', {
          description: 'The schedule of the order.',
        }),
        createdAt: t.expose('createdAt', {
          type: 'DateTime',
          description: 'The date and time the order was created.',
        }),
        updatedAt: t.expose('updatedAt', {
          type: 'DateTime',
          description: 'The date and time the order was updated.',
        }),
        user: t.relation('user', {
          description: 'The user who made the order.',
        }),
        service: t.relation('service', {
          description: 'The service for the order.',
        }),
        refundTicket: t.relation('refundTicket', {
          description: 'The refund ticket for the order.',
        }),
        payment: t.relation('payment', {
          description: 'The payment for the order.',
        }),
        paymentId: t.exposeString('paymentId', {
          description: 'The ID of the payment.',
        }),
      }),
    })
  }

  @Pothos()
  init(): void {
    // query section
    this.builder.queryFields((t) => ({
      orders: t.prismaField({
        type: [this.order()],
        description:
          'Retrieve a list of orders with optional filtering, ordering, and pagination.',
        args: this.builder.generator.findManyArgs('Order'),
        resolve: async (query, _root, args, _ctx, _info) => {
          return await this.prisma.order.findMany({
            ...query,
            take: args.take ?? undefined,
            skip: args.skip ?? undefined,
            orderBy: args.orderBy ?? undefined,
            where: args.filter ?? undefined,
          })
        },
      }),
      order: t.prismaField({
        type: this.order(),
        args: this.builder.generator.findUniqueArgs('Order'),
        description: 'Retrieve a single order by its unique identifier.',
        resolve: async (query, _root, args, _ctx, _info) => {
          return await this.prisma.order.findUnique({
            ...query,
            where: args.where,
          })
        },
      }),
    }))
    // mutation section
    this.builder.mutationFields((t) => ({
      createOrder: t.prismaField({
        type: this.order(),
        description: 'Create a new order.',
        args: {
          data: t.arg({
            type: this.builder.generator.getCreateInput('Order', [
              'id',
              'user',
              'paymentId',
              'payment',
              'refundTicket',
              'status',
              'total',
              'createdAt',
              'updatedAt',
            ]),
            required: true,
          }),
        },
        resolve: async (query, _root, args, ctx, _info) => {
          if (ctx.isSubscription) {
            throw new Error('Subscription is not allowed')
          }
          if (!args.data.service.connect?.id) {
            throw new Error('Service not found')
          }
          // query service
          const service = await this.prisma.service.findUnique({
            where: { id: args.data.service.connect.id },
          })
          if (!service) {
            throw new Error('Service not found')
          }
          // check if input schedule has order id then throw error
          const schedule = await this.prisma.schedule.findUnique({
            where: { id: args.data.schedule.connect?.id ?? '' },
          })
          if (schedule?.orderId) {
            // check if order status is PAID OR PENDING
            const order = await this.prisma.order.findUnique({
              where: { id: schedule.orderId },
            })
            if (
              order?.status === OrderStatus.PAID ||
              order?.status === OrderStatus.PENDING
            ) {
              throw new Error('Schedule already has an order')
            }
          }
          const order = await this.prisma.order.create({
            ...query,
            data: {
              status: OrderStatus.PENDING,
              total: service.price,
              userId: ctx.http.me?.id ?? '',
              serviceId: service.id,
              scheduleId: args.data.schedule.connect?.id ?? '',
            },
          })
          // check if service is valid
          if (!args.data.service.connect) {
            throw new Error('Service not found')
          }

          // check if order is free
          if (order.total === 0) {
            // assign schedule
            await this.prisma.schedule.update({
              where: { id: args.data.schedule.connect?.id ?? '' },
              data: {
                orderId: order.id,
              },
            })
            return order
          }

          // random integer
          const paymentCode = Math.floor(Math.random() * 1000000)
          // create payment
          const payment = await this.prisma.payment.create({
            data: {
              orderId: order.id,
              amount: service.price,
              paymentCode: paymentCode.toString(),
              expiredAt: DateTimeUtils.now().plus({ minutes: 15 }).toJSDate(),
            },
          })
          // generate payment url
          const paymentData = await this.payosService.createPayment({
            orderCode: paymentCode,
            amount: service.price,
            description: service.name,
            buyerName: ctx.http.me?.name ?? '',
            buyerEmail: ctx.http.me?.email ?? '',
            returnUrl: `${process.env.PAYOS_RETURN_URL}`.replace(
              '<serviceId>',
              service.id,
            ),
            cancelUrl: `${process.env.PAYOS_RETURN_URL}`.replace(
              '<serviceId>',
              service.id,
            ),
            expiredAt: DateTimeUtils.now()
              .plus({ minutes: 15 })
              .toUnixInteger(),
          })
          // update order payment id
          await this.prisma.order.update({
            where: { id: order.id },
            data: {
              paymentId: payment.id,
            },
          })
          // update payment url
          await this.prisma.payment.update({
            where: { id: payment.id },
            data: {
              paymentCode: paymentData.paymentLinkId,
            },
          })
          // refetch order
          return await this.prisma.order.findUnique({
            where: { id: order.id },
            include: {
              payment: true,
            },
          })
        },
      }),
      deleteOrder: t.prismaField({
        type: this.order(),
        description: 'Delete an existing order.',
        args: {
          where: t.arg({
            type: this.builder.generator.getWhereUnique('Order'),
            required: true,
          }),
        },
        resolve: async (query, _root, args, _ctx, _info) => {
          return await this.prisma.order.delete({
            ...query,
            where: args.where,
          })
        },
      }),
      updateOrder: t.prismaField({
        type: this.order(),
        description: 'Update an existing order.',
        args: {
          data: t.arg({
            type: this.builder.generator.getUpdateInput('Order', [
              'status',
              'total',
            ]),
            required: true,
          }),
          where: t.arg({
            type: this.builder.generator.getWhereUnique('Order'),
            required: true,
          }),
        },
        resolve: async (query, _root, args, _ctx, _info) => {
          return await this.prisma.order.update({
            ...query,
            data: args.data,
            where: args.where,
          })
        },
      }),
    }))
  }
}