import { ProjectEvents } from '@/modules/core/domain/projects/events'
import { generateProjectName } from '@/modules/core/domain/projects/logic'
import type {
  CreateProject,
  DeleteProject,
  GetProject,
  QueryAllProjects,
  StoreModel,
  StoreProject,
  StoreProjectRole,
  WaitForRegionProject
} from '@/modules/core/domain/projects/operations'
import type {
  Project,
  StreamWithOptionalRole
} from '@/modules/core/domain/streams/types'
import {
  ProjectQueryError,
  RegionalProjectCreationError
} from '@/modules/core/errors/projects'
import { StreamNotFoundError } from '@/modules/core/errors/stream'
import { ProjectVisibility } from '@/modules/core/graph/generated/graphql'
import { mapGqlToDbProjectVisibility } from '@/modules/core/helpers/project'
import { isTestEnv } from '@/modules/shared/helpers/envHelper'
import type { EventBusEmit } from '@/modules/shared/services/eventBus'
import { retry } from '@lifeomic/attempt'
import { Roles, TIME_MS } from '@speckle/shared'
import cryptoRandomString from 'crypto-random-string'
import type { GetExplicitProjects } from '@/modules/core/domain/streams/operations'

export const createNewProjectFactory =
  ({
    storeProject,
    storeProjectRole,
    storeModel,
    waitForRegionProject,
    emitEvent
  }: {
    storeProject: StoreProject
    storeProjectRole: StoreProjectRole
    storeModel: StoreModel
    waitForRegionProject: WaitForRegionProject
    emitEvent: EventBusEmit
  }): CreateProject =>
  async ({ description, name, regionKey, visibility, workspaceId, ownerId }) => {
    visibility =
      visibility ||
      (workspaceId ? ProjectVisibility.Workspace : ProjectVisibility.Private)

    const project: Project = {
      id: cryptoRandomString({ length: 10 }),
      name: name || generateProjectName(),
      description: description || '',
      visibility: mapGqlToDbProjectVisibility(visibility),
      createdAt: new Date(),
      clonedFrom: null,
      updatedAt: new Date(),
      workspaceId: workspaceId || null,
      regionKey: regionKey || null,
      allowPublicComments: false
    }

    await storeProject({ project })
    const projectId = project.id
    // if regionKey, we need to make sure it is actually written and synced
    if (regionKey) {
      await waitForRegionProject({
        projectId,
        regionKey
      })
    }
    await storeProjectRole({ projectId, userId: ownerId, role: Roles.Stream.Owner })
    await storeModel({
      name: 'main',
      description: 'default model',
      projectId,
      authorId: ownerId
    })

    await emitEvent({
      eventName: ProjectEvents.Created,
      payload: {
        project,
        ownerId,
        input: {
          description: project.description,
          name: project.name,
          visibility
        }
      }
    })

    await emitEvent({
      eventName: ProjectEvents.PermissionsAdded,
      payload: {
        project,
        activityUserId: ownerId,
        targetUserId: ownerId,
        role: Roles.Stream.Owner,
        previousRole: null
      }
    })
    return project
  }

export const waitForRegionProjectFactory =
  (deps: {
    getProject: GetProject
    deleteProject: DeleteProject
  }): WaitForRegionProject =>
  async ({ projectId, regionKey, maxAttempts = 10 }) => {
    try {
      await retry(
        async () => {
          const replicatedProject = await deps.getProject({ projectId })
          if (!replicatedProject) throw new StreamNotFoundError()
        },
        { maxAttempts, delay: isTestEnv() ? TIME_MS.second : undefined }
      )
    } catch (err) {
      if (err instanceof StreamNotFoundError) {
        // delete from region
        await deps.deleteProject({ projectId })
        throw new RegionalProjectCreationError(undefined, {
          info: { projectId, regionKey }
        })
      }
      // else throw as is
      throw err
    }
  }

export const queryAllProjectsFactory = ({
  getExplicitProjects
}: {
  getExplicitProjects: GetExplicitProjects
}): QueryAllProjects =>
  async function* queryAllWorkspaceProjects({
    userId,
    workspaceId
  }): AsyncGenerator<StreamWithOptionalRole[], void, unknown> {
    let currentCursor: string | null = null
    let iterationCount = 0

    if (!userId && !workspaceId)
      throw new ProjectQueryError('No user or workspace ID provided')

    do {
      if (iterationCount > 500) throw new ProjectQueryError('Too many iterations')

      const { items, cursor } = await getExplicitProjects({
        cursor: currentCursor,
        limit: 100,
        filter: {
          workspaceId,
          userId
        }
      })

      yield items

      currentCursor = cursor
      iterationCount++
    } while (!!currentCursor)
  }