import { PrismaService } from '@/src/core/prisma/prisma.service'
import { ChangeProfileInfoInput } from '@/src/module/auth/profile/inputs/change-profile-info.input'
import { ConflictException, Injectable } from '@nestjs/common'
import sharp from 'sharp'
import { StorageService } from '../../libs/storage/storage.service'
import { User } from '@/prisma/generated'
import * as Upload from 'graphql-upload/Upload.js'

@Injectable()
export class ProfileService {
  constructor(
    private readonly prismaService: PrismaService,
    private readonly storageService: StorageService,
  ) {
  }

  public async changeAvatar(user: User, file: Upload) {
    if (user.avatar) {
      await this.storageService.remove(user.avatar)
    }

    const chunks: Buffer[] = []

    for await (const chunk of file.createReadStream()) {
      chunks.push(chunk)
    }

    const buffer = Buffer.concat(chunks)
    const fileName = `/channels/${user.name}.webp`

    const processedBuffer = await sharp(buffer, { animated: file.filename.endsWith('.gif') })
      .resize(512, 512)
      .webp()
      .toBuffer()

    await this.storageService.upload(processedBuffer, fileName, 'image/webp')

    await this.prismaService.user.update({
      where: { id: user.id },
      data: { avatar: fileName },
    })

    return true
  }

  public async removeAvatar(user: User) {
    if (!user.avatar) {
      return true
    }

    await this.storageService.remove(user.avatar)

    await this.prismaService.user.update({
      where: { id: user.id },
      data: { avatar: null },
    })
    return true
  }

  public async changeInfo(user: User, input: ChangeProfileInfoInput) {
    const { bio = user.bio, displayName = user.displayName, name = user.name } = input

    const existingUser = await this.prismaService.user.findUnique({
      where: { name },
    })
    if (existingUser && user.name !== name) {
      throw new ConflictException('Пользователь с таким именем уже существует')
    }

    return this.prismaService.user.update({
      where: { id: user.id },
      data: { bio, displayName, name },
    })
  }
}