import { PasswordUtil } from '@/common/utils/password.util'
import {
  AccountStatus,
  AccountType,
  ConsumerRole,
  ConsumerStatus,
  PartnerStatus,
} from '@/generated/prisma/enums'
import { ConsumerSelect, ConsumerWhereInput } from '@/generated/prisma/models'
import mapConsumerWithLicenseUtil from '@/modules/consumer/utils/mapConsumerWithLicense.util'
import { PrismaService } from '@/prisma/prisma.service'
import { BadRequestException, Injectable } from '@nestjs/common'
import { ResponseMapper } from 'common/response/response-mapper'
import { CreateConsumerDto, UpdateConsumerDto } from './dto/create-consumers.dto'

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

  private readonly setExpireDate = (starts_at: Date) => {
    return new Date(
      new Date(starts_at).setFullYear(new Date(starts_at).getFullYear() + 1),
    ).toISOString()
  }

  defaultSelect: ConsumerSelect = {
    id: true,
    first_name: true,
    last_name: true,
    mobile_number: true,
    national_code: true,
    status: true,
    created_at: true,
  }

  private defaultWhere = (partner_id: string): ConsumerWhereInput => ({
    partner_id,
  })

  async findAll(partner_id: string, page = 1, perPage = 10) {
    const [consumers, total] = await this.prisma.$transaction(async tx => [
      await tx.consumer.findMany({
        where: this.defaultWhere(partner_id),
        select: this.defaultSelect,
        skip: (page - 1) * perPage,
        take: 10,
      }),
      await tx.consumer.count({
        where: this.defaultWhere(partner_id),
      }),
    ])
    return ResponseMapper.paginate(consumers.map(mapConsumerWithLicenseUtil), {
      total,
      page,
      perPage,
    })
  }

  async findOne(partner_id: string, consumer_id: string) {
    const consumer = await this.prisma.consumer.findUniqueOrThrow({
      where: {
        ...(this.defaultWhere(partner_id) as any),
        id: consumer_id,
      },
      select: this.defaultSelect,
    })

    return ResponseMapper.single(mapConsumerWithLicenseUtil(consumer))
  }

  async create(partner_id: string, data: CreateConsumerDto) {
    const consumer = await this.prisma.$transaction(async tx => {
      const partnerLicense = await tx.license.findFirst({
        where: {
          charge_transaction: {
            partner: {
              id: partner_id,
              status: PartnerStatus.ACTIVE,
            },
          },
          activation: null,
        },
        orderBy: {
          charge_transaction: {
            activation_expires_at: 'asc',
          },
        },
        select: {
          id: true,
          charge_transaction: {
            select: {
              partner: {
                select: {
                  id: true,
                  name: true,
                  status: true,
                },
              },
            },
          },
        },
      })

      if (!partnerLicense) {
        throw new BadRequestException(`تعداد لایسنس‌های فعلی شما به پایان رسیده است.`)
      }

      const { username, password, license_starts_at, ...rest } = data

      const existingConsumer = await tx.consumer.findFirst({
        where: {
          partner_id,
          OR: [
            { mobile_number: data.mobile_number },
            { national_code: data.national_code },
          ],
        },
        select: { id: true, first_name: true, last_name: true },
      })

      if (existingConsumer) {
        throw new BadRequestException(
          `مصرف کننده‌ی ${existingConsumer.first_name} ${existingConsumer.last_name} با شماره موبایل یا کد ملی وارد شده از قبل ثبت شده است.`,
        )
      }

      return await tx.consumer.create({
        data: {
          ...rest,
          partner: {
            connect: {
              id: partner_id,
            },
          },
          consumer_accounts: {
            create: {
              role: ConsumerRole.OWNER,
              account: {
                create: {
                  username,
                  password: await PasswordUtil.hash(password),
                  type: AccountType.CONSUMER,
                  status: AccountStatus.ACTIVE,
                },
              },
            },
          },
          status: ConsumerStatus.ACTIVE,
        },
        select: this.defaultSelect,
      })
    })

    return ResponseMapper.single(mapConsumerWithLicenseUtil(consumer))
  }

  async update(id: string, partner_id: string, data: UpdateConsumerDto) {
    return this.prisma.consumer.update({
      where: {
        ...(this.defaultWhere(partner_id) as any),
        id,
      },
      data,
    })
  }
}