import { PasswordUtil } from '@/common/utils/password.util'
import { ChargedLicenseTransactions } from '@/generated/prisma/client'
import {
  AccountStatus,
  AccountType,
  PartnerRole,
  PartnerStatus,
} from '@/generated/prisma/enums'
import { PartnerSelect } from '@/generated/prisma/models'
import { PrismaService } from '@/prisma/prisma.service'
import { Injectable } from '@nestjs/common'
import { ResponseMapper } from 'common/response/response-mapper'
import { CreatePartnerDto, UpdatePartnerDto } from './dto/partner.dto'

@Injectable()
export class PartnersService {
  constructor(private readonly prisma: PrismaService) {}

  private readonly defaultSelect: PartnerSelect = {
    id: true,
    name: true,
    code: true,
    status: true,
    created_at: true,
    chargedLicenseTransactions: {
      select: {
        activation_expires_at: true,
        licenses: {
          select: {
            activated_license: {
              select: {
                id: true,
              },
            },
          },
        },
      },
    },
  }

  private readonly separateLicenseCount = (
    transactions: ChargedLicenseTransactions[] | null,
  ) => {
    function toDateOnlyString(date) {
      return date.toISOString().slice(0, 10)
    }

    const startOfTodayDate = toDateOnlyString(new Date())

    const used = transactions?.reduce((sum, cur) => {
      const license = cur as any
      return (
        sum + license.licenses.filter(license => license.activated_license).length || 0
      )
    }, 0)

    const total = transactions?.reduce((sum, cur) => {
      const license = cur as any

      return sum + license.licenses.length || 0
    }, 0)

    const expired = transactions?.reduce((sum, cur) => {
      const license = cur as any
      const activationExpiresDate = toDateOnlyString(license.activation_expires_at)
      if (startOfTodayDate > activationExpiresDate)
        return (
          sum + license.licenses.filter(license => !license.activated_license).length || 0
        )
      return sum
    }, 0)

    return {
      total,
      used,
      expired,
    }
  }

  async findAll() {
    const partners = await this.prisma.partner.findMany({
      select: this.defaultSelect,
    })

    const mappedPartners = partners.map(partner => {
      const { chargedLicenseTransactions, ...rest } = partner
      return {
        ...rest,
        licenses_status: this.separateLicenseCount(chargedLicenseTransactions),
      }
    })

    return ResponseMapper.list(mappedPartners)
  }

  async findOne(id: string) {
    const partner = await this.prisma.partner.findUniqueOrThrow({
      where: { id },
      select: this.defaultSelect,
    })

    const { chargedLicenseTransactions, ...rest } = partner
    const mappedPartner = {
      ...rest,
      licenses_status: this.separateLicenseCount(chargedLicenseTransactions),
    }

    return ResponseMapper.single(mappedPartner)
  }

  async create(data: CreatePartnerDto) {
    const { username, password, ...rest } = data
    const partner = await this.prisma.partner.create({
      data: {
        ...rest,
        status: PartnerStatus.ACTIVE,
        partner_accounts: {
          create: {
            role: PartnerRole.OWNER,
            account: {
              create: {
                username,
                password: await PasswordUtil.hash(data.password),
                status: AccountStatus.ACTIVE,
                type: AccountType.PARTNER,
              },
            },
          },
        },
      },
      select: this.defaultSelect,
    })
    return ResponseMapper.create(partner)
  }

  async update(id: string, data: UpdatePartnerDto) {
    const partner = await this.prisma.partner.update({
      where: { id },
      data,
      select: this.defaultSelect,
    })
    return ResponseMapper.update(partner)
  }

  async delete(id: string) {
    await this.prisma.partner.delete({ where: { id } })
    return ResponseMapper.delete()
  }
}