import { Inject, Injectable, Logger } from '@nestjs/common'
import { OrderStatus, Role, ScheduleStatus } from '@prisma/client'
import { Pothos, PothosRef, PothosSchema, SchemaBuilderToken } from '@smatch-corp/nestjs-pothos'
import { Builder } from '../Graphql/graphql.builder'
import { PrismaService } from '../Prisma/prisma.service'

@Injectable()
export class ServiceFeedbackSchema extends PothosSchema {
  constructor(
    @Inject(SchemaBuilderToken) private readonly builder: Builder,
    private readonly prisma: PrismaService,
  ) {
    super()
  }

  @PothosRef()
  serviceFeedback() {
    return this.builder.prismaObject('ServiceFeedback', {
      description: 'A feedback for a service.',
      fields: (t) => ({
        id: t.exposeID('id', {
          description: 'The ID of the service feedback.',
        }),
        userId: t.exposeID('userId', {
          description: 'The ID of the user who provided the feedback.',
        }),
        serviceId: t.exposeID('serviceId', {
          description: 'The ID of the service that was provided.',
        }),
        rating: t.exposeFloat('rating', {
          description: 'The rating of the service.',
        }),
        comments: t.exposeString('comments', {
          description: 'The comments of the service feedback.',
        }),
        createdAt: t.expose('createdAt', {
          type: 'DateTime',
          nullable: true,
          description: 'The date and time the service feedback was created.',
        }),
        updatedAt: t.expose('updatedAt', {
          type: 'DateTime',
          nullable: true,
          description: 'The date and time the service feedback was updated.',
        }),
        user: t.relation('user', {
          description: 'The user who provided the feedback.',
        }),
        service: t.relation('service', {
          description: 'The service that was provided.',
        }),
      }),
    })
  }

  @Pothos()
  init(): void {
    this.builder.queryFields((t) => ({
      serviceFeedbacks: t.prismaField({
        type: [this.serviceFeedback()],
        args: this.builder.generator.findManyArgs('ServiceFeedback'),
        description: 'Retrieve a list of service feedbacks with optional filtering, ordering, and pagination.',
        resolve: async (query, _root, args, _ctx, _info) => {
          return await this.prisma.serviceFeedback.findMany({
            ...query,
            skip: args.skip ?? undefined,
            take: args.take ?? undefined,
            orderBy: args.orderBy ?? undefined,
            where: args.filter ?? undefined,
          })
        },
      }),
    }))
    this.builder.mutationFields((t) => ({
      createServiceFeedback: t.prismaField({
        type: this.serviceFeedback(),
        args: {
          orderId: t.arg({
            type: 'String',
            required: true,
          }),
          rating: t.arg({
            type: 'Float',
            required: true,
          }),
          comments: t.arg({
            type: 'String',
            required: false,
          }),
        },
        description: 'Create a new service feedback.',
        resolve: async (_, _root, args, ctx, _info) => {
          if (ctx.isSubscription) {
            throw new Error('Not allowed')
          }
          if (!ctx.http?.me) {
            throw new Error('Unauthorized')
          }
          // allow only when user is CUSTOMER and order is completed
          if (ctx.http?.me?.role !== Role.CUSTOMER) {
            throw new Error('Unauthorized')
          }
          Logger.log(`args: ${JSON.stringify(args)}`)
          const order = await this.prisma.order.findFirst({
            where: {
              id: args.orderId,
              userId: ctx.http?.me?.id,
              status: OrderStatus.PAID,
              schedule: {
                dates: {
                  every: {
                    status: ScheduleStatus.COMPLETED,
                  },
                },
              },
            },
          })
          if (!order) {
            throw new Error('Order not found')
          }
          if (order.userId !== ctx.http?.me?.id) {
            throw new Error('Unauthorized')
          }
          if (order.status !== OrderStatus.PAID) {
            throw new Error('Order not completed')
          }
          // validate rating
          if (args.rating < 0 || args.rating > 5) {
            throw new Error('Invalid rating')
          }
          // validate comments
          if (args.comments && args.comments.length > 1024) {
            throw new Error('Comments too long')
          }
          return await this.prisma.serviceFeedback.create({
            data: {
              userId: ctx.http?.me?.id,
              serviceId: order.serviceId,
              rating: args.rating,
              comments: args.comments,
            },
          })
        },
      }),
    }))
  }
}