import type { Logger } from '@/observability/logging'
import {
  GetPaginatedObjectPreviewsInErrorState,
  GetPaginatedObjectPreviewsPage,
  GetPaginatedObjectPreviewsTotalCount,
  RequestObjectPreview,
  UpdateObjectPreview
} from '@/modules/previews/domain/operations'
import { PreviewStatus } from '@/modules/previews/domain/consts'
import { Roles, Scopes, TIME_MS } from '@speckle/shared'
import { DefaultAppIds } from '@/modules/auth/defaultApps'
import { TokenResourceIdentifierType } from '@/modules/core/domain/tokens/types'
import { GetStreamCollaborators } from '@/modules/core/domain/streams/operations'
import { CreateAndStoreAppToken } from '@/modules/core/domain/tokens/operations'

export const getPaginatedObjectPreviewInErrorStateFactory =
  (deps: {
    getPaginatedObjectPreviewsPage: GetPaginatedObjectPreviewsPage
    getPaginatedObjectPreviewsTotalCount: GetPaginatedObjectPreviewsTotalCount
    maximumNumberOfAttempts?: number
  }): GetPaginatedObjectPreviewsInErrorState =>
  async (params) => {
    const filter = {
      status: PreviewStatus.ERROR,
      maxNumberOfAttempts: deps.maximumNumberOfAttempts ?? 3 // only retry items that have errored less than 3 times
    }
    const [result, totalCount] = await Promise.all([
      deps.getPaginatedObjectPreviewsPage({
        ...params,
        filter
      }),
      deps.getPaginatedObjectPreviewsTotalCount({
        ...params,
        filter
      })
    ])
    return {
      ...result,
      totalCount
    }
  }

export const retryFailedPreviewsFactory = (deps: {
  getPaginatedObjectPreviewsInErrorState: GetPaginatedObjectPreviewsInErrorState
  updateObjectPreview: UpdateObjectPreview
  getStreamCollaborators: GetStreamCollaborators
  serverOrigin: string
  createAppToken: CreateAndStoreAppToken
  requestObjectPreview: RequestObjectPreview
}) => {
  const {
    getPaginatedObjectPreviewsInErrorState,
    updateObjectPreview,
    getStreamCollaborators,
    serverOrigin,
    createAppToken,
    requestObjectPreview
  } = deps
  return async (params: { logger: Logger }): Promise<boolean> => {
    const { logger } = params
    const { items, totalCount } = await getPaginatedObjectPreviewsInErrorState({
      limit: 1, //get the least recent item that has errored
      cursor: null // always get the first item
    })
    if (items.length === 0) {
      //NOTE we rely on the items returned, as this accounts for the cursor position. More errored items might have been added since the last time we checked and changed the totalCount.
      logger.info('No object previews in error state found.')
      return false
    }

    const objPreview = items[0]
    const { streamId, objectId } = objPreview

    logger.info(
      {
        totalErroredPreviewCount: totalCount,
        streamId, //legacy
        projectId: streamId,
        objectId,
        attempts: objPreview.attempts
      },
      'Found {totalErroredPreviewCount} object previews in error state. Attempting to retry one: {projectId}.{objectId}. Previous attempts: {attempts}'
    )

    await updateObjectPreview({
      objectPreview: {
        ...objPreview,
        previewStatus: PreviewStatus.PENDING, // move it to pending so it doesn't get picked up again
        incrementAttempts: true // increment the number of attempts
      }
    })

    const owners = await getStreamCollaborators(streamId, Roles.Stream.Owner)
    // there is always an owner, this is safe
    const userId = owners[0].id

    // we're running the preview generation in the name of a project owner
    const token = await createAppToken({
      appId: DefaultAppIds.Web,
      name: `preview-${streamId}@${objectId}`,
      userId,
      scopes: [Scopes.Streams.Read],
      lifespan: 2 * TIME_MS.hour,
      limitResources: [
        {
          id: streamId,
          type: TokenResourceIdentifierType.Project
        }
      ]
    })
    const url = new URL(
      `/projects/${streamId}/models/${objectId}`,
      serverOrigin
    ).toString()

    await requestObjectPreview({ jobId: `${streamId}.${objectId}`, token, url })

    return true
  }
}