import { UploadedFileTypes } from '@/common/enums/enums'
import { ResponseMapper } from '@/common/response/response-mapper'
import { GoodSelect, GoodWhereInput } from '@/generated/prisma/models'
import { UploaderService } from '@/modules/uploader/uploader.service'
import { PrismaService } from '@/prisma/prisma.service'
import { Injectable } from '@nestjs/common'
import { PosCacheInvalidationService } from '../cache/pos-cache-invalidation.service'
import { CreateOwnedGoodsDto } from './dto/create-owned-goods.dto'
import { UpdateOwnedGoodsDto } from './dto/update-owned-goods.dto'

@Injectable()
export class OwnedGoodsService {
  constructor(
    private readonly prisma: PrismaService,
    private readonly uploaderService: UploaderService,
    private readonly posCacheInvalidationService: PosCacheInvalidationService,
  ) {}

  private readonly where = (business_activity_id: string): GoodWhereInput => ({
    is_default_guild_good: false,
    business_activity_id,
  })

  private readonly select: GoodSelect = {
    id: true,
    name: true,
    pricing_model: true,
    image_url: true,
    description: true,
    sku: {
      select: {
        id: true,
        name: true,
        code: true,
      },
    },
    measure_unit: {
      select: {
        id: true,
        name: true,
        code: true,
      },
    },
    category: {
      select: {
        id: true,
        name: true,
      },
    },
  }

  async findAll(business_activity_id: string) {
    const items = await this.prisma.good.findMany({
      where: this.where(business_activity_id),
      select: this.select,
    })

    return ResponseMapper.list(items)
  }

  async findOne(business_activity_id: string, id: string) {
    const item = await this.prisma.good.findUnique({
      where: { ...(this.where(business_activity_id) as any), id },
      select: this.select,
    })
    return ResponseMapper.single(item)
  }

  async create(
    guild_id: string,
    business_activity_id: string,
    data: CreateOwnedGoodsDto,
    file: Express.Multer.File,
  ) {
    const { category_id, measure_unit_id, sku_id, ...rest } = data

    const good = await this.prisma.$transaction(async tx => {
      let image_url = ''
      if (file) {
        const uploadedUrl = await this.uploaderService.uploadFile(
          file,
          UploadedFileTypes.GOOD,
        )
        image_url = uploadedUrl || ''
      }

      return await tx.good.create({
        data: {
          ...rest,
          is_default_guild_good: true,
          image_url,
          sku: {
            connect: {
              id: sku_id,
            },
          },
          measure_unit: {
            connect: {
              id: measure_unit_id,
            },
          },
          category: {
            connect: {
              id: category_id,
            },
          },
          business_activity: {
            connect: {
              id: business_activity_id,
            },
          },
        },
        select: this.select,
      })
    })

    await this.posCacheInvalidationService.invalidatePosGoodsList(
      guild_id,
      business_activity_id,
    )

    return ResponseMapper.create(good)
  }

  async update(
    guild_id: string,
    business_activity_id: string,
    id: string,
    data: UpdateOwnedGoodsDto,
    file: Express.Multer.File,
  ) {
    const { category_id, measure_unit_id, sku_id, ...rest } = data

    const good = await this.prisma.$transaction(async tx => {
      let image_url = undefined as string | undefined
      if (file) {
        const uploadedUrl = await this.uploaderService.uploadFile(
          file,
          UploadedFileTypes.GOOD,
        )
        image_url = uploadedUrl
      }

      const prevImage = await tx.good.findUnique({
        where: { id },
        select: { image_url: true },
      })

      if (image_url && prevImage?.image_url) {
        this.uploaderService.deleteFile(prevImage.image_url, UploadedFileTypes.GOOD)
      }

      return await tx.good.update({
        where: { ...(this.where(business_activity_id) as any), id },
        data: {
          ...rest,
          is_default_guild_good: false,
          image_url,
          sku: {
            connect: {
              id: sku_id,
            },
          },
          measure_unit: {
            connect: {
              id: measure_unit_id,
            },
          },
          category: {
            connect: {
              id: category_id,
            },
          },
          business_activity: {
            connect: {
              id: business_activity_id,
            },
          },
        },
        select: this.select,
      })
    })

    await this.posCacheInvalidationService.invalidatePosGoodsList(
      guild_id,
      business_activity_id,
    )

    return ResponseMapper.create(good)
  }
}