// What the archive module does, as pure TypeScript over the port in ports.ts.
//
// Documents are the organization's: every project of the app sees the same ones (a multi-tenant app keeps
// all its tenants' documents in its deployment's one organization; partitioning by app tenant is an open
// owner decision, B-wave contract §11.4). A version is made from a file the project holds: the files
// module's read is the membership check, so another project's or organization's file is simply not there,
// and the facts a version records are the ones the store measured, never the caller's.

import type { ProjectScope } from "@conusai-kit/core"
import { type FilesDeps, getFileStorage } from "@conusai-kit/files"
import {
  type DocumentReceipt,
  type DocumentView,
  PAGE_LIMIT,
  type RetentionClassView,
  type VersionFacts,
  type VersionView,
} from "../contract/index.js"
import type { ArchiveReads, ArchiveService, Page } from "./ports.js"

/** The service's idempotency key of a request: one project's request id never answers another's. */
export const requestKey = (scope: Pick<ProjectScope, "projectId">, requestId: string): string =>
  `app-project:${scope.projectId}:${requestId}`

const paged = (query: { after?: string; limit?: number }) => ({
  ...(query.after === undefined ? {} : { after: query.after }),
  limit: query.limit ?? PAGE_LIMIT,
})

/** The facts of a version made from a stored file. The reference names the file, and nothing else of it. */
export async function versionFacts(deps: FilesDeps, scope: ProjectScope, fileId: string): Promise<VersionFacts> {
  const { file } = await getFileStorage(deps, scope, fileId)
  return {
    sha256: file.sha256,
    mediaType: file.contentType,
    size: file.size,
    blobRef: `conusai://blob/files/${file.fileId}`,
  }
}

export function listDocuments(
  reads: ArchiveReads,
  query: { q?: string; after?: string; limit?: number },
): Promise<Page<DocumentView>> {
  const q = query.q?.trim()
  return reads.listDocuments({ ...(q ? { q } : {}), ...paged(query) })
}

export async function getDocument(
  reads: ArchiveReads,
  documentId: string,
): Promise<{ document: DocumentView; versions: VersionView[] }> {
  const document = await reads.getDocument(documentId)
  const versions = await reads.listVersions(documentId, { limit: PAGE_LIMIT })
  return { document, versions: versions.rows }
}

export async function registerDocument(
  service: ArchiveService,
  files: FilesDeps,
  scope: ProjectScope,
  input: { title: string; kind?: string; retentionClass: string; fileId: string; requestId: string },
): Promise<DocumentReceipt> {
  const kind = input.kind?.trim()
  return service.registerDocument({
    title: input.title.trim(),
    ...(kind ? { kind } : {}),
    retentionClass: input.retentionClass,
    version: await versionFacts(files, scope, input.fileId),
    key: requestKey(scope, input.requestId),
  })
}

export async function addVersion(
  service: ArchiveService,
  files: FilesDeps,
  scope: ProjectScope,
  input: { documentId: string; revision: string; fileId: string; requestId: string },
): Promise<DocumentReceipt> {
  return service.addVersion({
    documentId: input.documentId,
    revision: input.revision,
    version: await versionFacts(files, scope, input.fileId),
    key: requestKey(scope, input.requestId),
  })
}

export function setLegalHold(
  service: ArchiveService,
  scope: ProjectScope,
  input: { documentId: string; revision: string; legalHold: boolean; requestId: string },
): Promise<DocumentReceipt> {
  return service.setLegalHold({
    documentId: input.documentId,
    revision: input.revision,
    legalHold: input.legalHold,
    key: requestKey(scope, input.requestId),
  })
}

export function disposeDocument(
  service: ArchiveService,
  scope: ProjectScope,
  input: { documentId: string; revision: string; requestId: string },
): Promise<DocumentReceipt> {
  return service.disposeDocument({
    documentId: input.documentId,
    revision: input.revision,
    key: requestKey(scope, input.requestId),
  })
}

export function listRetentionClasses(
  reads: ArchiveReads,
  query: { after?: string; limit?: number },
): Promise<Page<RetentionClassView>> {
  return reads.listRetentionClasses(paged(query))
}

export async function createRetentionClass(
  service: ArchiveService,
  scope: ProjectScope,
  input: { code: string; keepFor: string; from: RetentionClassView["from"]; requestId: string },
): Promise<{ code: string }> {
  await service.createRetentionClass({
    code: input.code,
    keepFor: input.keepFor.trim(),
    from: input.from,
    key: requestKey(scope, input.requestId),
  })
  return { code: input.code }
}

export function listDisposalDue(
  reads: ArchiveReads,
  query: { after?: string; limit?: number },
): Promise<Page<DocumentView>> {
  return reads.listDisposalDue(paged(query))
}