import { Injectable } from '@angular/core';
import { MessageAttachmentByMessageIdInput } from './message-attachment-by-message-id.service';
import { AttachmentRemoteDataSourceService } from 'src/app/module/chat/data/repository/attachment/attachment-remote-repository.service'
import { AttachmentLocalDataSource } from 'src/app/module/chat/data/repository/attachment/attachment-local-repository.service'
import { err, Result } from 'neverthrow';
import { AttachmentTableSchema } from 'src/app/infra/database/dexie/instance/chat/schema/attachment';
import { z } from 'zod';
import { createBlobUrl } from 'src/app/utils/ToBase64';

const GetMessageAttachmentLocallyByMessageIdSchema = AttachmentTableSchema.pick({
  $messageId: true
})

export type GetMessageAttachmentLocallyByMessageId = z.infer<typeof GetMessageAttachmentLocallyByMessageIdSchema>



@Injectable({
  providedIn: 'root'
})
export class GetMessageAttachmentLocallyUseCaseService {

  constructor(
    private AttachmentRemoteDataSourceService: AttachmentRemoteDataSourceService,
    private AttachmentLocalDataSource: AttachmentLocalDataSource
  ) { }


  async execute(input: GetMessageAttachmentLocallyByMessageId): Promise<Result<string, any>> {

    const getLocalAttachment = await this.AttachmentLocalDataSource.findOne({
      $messageId: input.$messageId
    })

    if(getLocalAttachment.isOk()) {
      if(getLocalAttachment.value) {
        const dataUrl = await createBlobUrl(getLocalAttachment.value.file)

        return dataUrl
      }
    } else  {
      return err(getLocalAttachment.error) 
    }
  }

}