// The handlers of the module's procedures, its sweep job and its own share of an account: each
// resolves the ports from the container it runs with and calls one use case. No rule lives here.

import { AppError, type Container, forbidden, implement, type JobDef } from "@conusai-kit/core"
import { DATA_SOURCE, SYSTEM_DATA } from "@conusai-kit/data"
import { type AccountDataContribution, accountDataOf } from "@conusai-kit/tenancy"
import { z } from "zod"
import { ACCOUNT_SECTION, DELETION_SWEEP_JOB, REVOCATION_JOB } from "../contract/constants.js"
import {
  accountAnalyticsExport,
  accountAnalyticsRequest,
  accountAnalyticsStatus,
  accountDataExport,
  accountDeletionRequest,
  accountDeletionStatus,
} from "../contract/procedures.js"
import { analyticsExport, analyticsStatus, requestAnalytics } from "../core/analytics.js"
import {
  deleteForProvider,
  deletionStatus,
  disableForProvider,
  requestDeletion,
  sweepDeletions,
} from "../core/deletion.js"
import { exportAccount } from "../core/export.js"
import {
  ACCOUNT_CREDENTIAL,
  ACCOUNT_IDENTITY_PROVIDER,
  ACCOUNT_PRIVACY,
  ACCOUNT_REGISTRY,
  ACCOUNT_STORE,
  type AccountCredential,
  type AccountDeps,
  type AccountPrivacy,
  type AccountStore,
  REVOCATION_STORE,
} from "../core/ports.js"
import { type RevocationDeps, revokeOnSignOut, sweepSessionRevocations } from "../core/revocation.js"
import { createRevocationStore } from "./revocations.js"
import { createAccountStore } from "./store.js"

/** The bound store (the Convex profile's actions), or the one over the container's data source. */
const storeOf = (container: Container): AccountStore =>
  container.has(ACCOUNT_STORE)
    ? container.resolve(ACCOUNT_STORE)
    : createAccountStore({ data: container.resolve(DATA_SOURCE), system: container.resolve(SYSTEM_DATA) })

const depsOf = (container: Container, signal?: AbortSignal): AccountDeps => ({
  store: storeOf(container),
  contributions: accountDataOf(container.resolve(ACCOUNT_REGISTRY)),
  container,
  now: Date.now,
  ...(signal ? { signal } : {}),
  ...(container.has(ACCOUNT_IDENTITY_PROVIDER)
    ? { identityProvider: () => container.resolve(ACCOUNT_IDENTITY_PROVIDER) }
    : {}),
})

/** A process or a test that bound no credential is a caller with no interactive session. */
const credentialOf = (container: Container): AccountCredential =>
  container.has(ACCOUNT_CREDENTIAL) ? container.resolve(ACCOUNT_CREDENTIAL) : { interactive: false }

/**
 * This app's own rows about the person, as a section of the export. It has no erasure: those rows go
 * last, in the deletion's own final step, after every other module confirmed its erasure.
 */
export const accountOwnData: AccountDataContribution = {
  key: ACCOUNT_SECTION,
  export: ({ subject, container }) => storeOf(container).localExport(subject),
}

export const accountDataExportImpl = implement(accountDataExport, async ({ ctx }) => {
  const deps = depsOf(ctx.container, ctx.signal)
  // Only the person, never a bearer acting as them: an export is their data, in full.
  if (!credentialOf(ctx.container).interactive) {
    throw forbidden("exporting an account needs the person signed in to this app, not an API credential")
  }
  return exportAccount(deps, ctx.scope.actor.userId)
})

export const accountDeletionStatusImpl = implement(accountDeletionStatus, async ({ ctx }) =>
  deletionStatus(depsOf(ctx.container, ctx.signal), ctx.scope.actor.userId, credentialOf(ctx.container)),
)

export const accountDeletionRequestImpl = implement(accountDeletionRequest, async ({ input, ctx }) =>
  requestDeletion(depsOf(ctx.container, ctx.signal), {
    userId: ctx.scope.actor.userId,
    credential: credentialOf(ctx.container),
    confirm: input.confirm,
  }),
)

const privacyOf = (container: Container): AccountPrivacy | undefined =>
  container.has(ACCOUNT_PRIVACY) ? container.resolve(ACCOUNT_PRIVACY) : undefined

/** The person's platform data is theirs alone: a bearer acting as them may neither erase nor take it. */
const requireInteractive = (container: Container, what: string): void => {
  if (!credentialOf(container).interactive) {
    throw forbidden(`${what} needs the person signed in to this app, not an API credential`)
  }
}

export const accountAnalyticsRequestImpl = implement(accountAnalyticsRequest, async ({ input, ctx }) => {
  requireInteractive(ctx.container, input.kind === "erase" ? "erasing analytics data" : "exporting analytics data")
  return requestAnalytics(privacyOf(ctx.container), ctx.scope.actor.userId, input.kind, Date.now)
})

export const accountAnalyticsStatusImpl = implement(accountAnalyticsStatus, async ({ input, ctx }) => {
  requireInteractive(ctx.container, "reading an analytics request")
  return analyticsStatus(privacyOf(ctx.container), ctx.scope.actor.userId, input.ticket, Date.now)
})

export const accountAnalyticsExportImpl = implement(accountAnalyticsExport, async ({ input, ctx }) => {
  requireInteractive(ctx.container, "downloading analytics data")
  return analyticsExport(privacyOf(ctx.container), ctx.scope.actor.userId, input.ticket, Date.now)
})

export const ACCOUNT_PROCEDURES = [
  accountDataExportImpl,
  accountDeletionStatusImpl,
  accountDeletionRequestImpl,
  accountAnalyticsRequestImpl,
  accountAnalyticsStatusImpl,
  accountAnalyticsExportImpl,
]

const revocationDepsOf = (container: Container, log: RevocationDeps["log"], callMs?: number): RevocationDeps => ({
  // The bound outbox (the Convex profile's actions), or the one over the container's data source.
  store: container.has(REVOCATION_STORE)
    ? container.resolve(REVOCATION_STORE)
    : createRevocationStore(container.resolve(DATA_SOURCE)),
  contributions: accountDataOf(container.resolve(ACCOUNT_REGISTRY)),
  container,
  now: Date.now,
  log,
  ...(callMs === undefined ? {} : { callMs }),
})

/**
 * kit-auth's `onSessionRevoked` hook for this app (apps/web): records the revocation of an app
 * session in the revocation outbox and delivers it to every module that minted derived sessions,
 * bounded; what is not delivered the worker's REVOCATION_JOB retries (on the Convex profile, the
 * backend's `account:revokeSession` action runs it and a one-minute cron the job). Throws only when the row could
 * not be written. `container` binds the data source, the registry and the modules' platform ports.
 */
export function recordSessionRevocation(
  container: Container,
  session: string,
  options: { log: RevocationDeps["log"]; callMs?: number },
): Promise<void> {
  return revokeOnSignOut(revocationDepsOf(container, options.log, options.callMs), session)
}

/**
 * An account event of the app's external identity provider, delivered server-side (the Better Auth
 * revocation relay): `account-deleted` erases the account through the same ledger as a deletion the
 * person asks for, `user-disabled` revokes every credential and derived service session of it. The
 * user is the mapped app user; an event for a subject that never signed in to this app has none
 * and is not delivered here. Idempotent, so a replayed event is harmless.
 */
export async function recordProviderAccountEvent(
  container: Container,
  event: { readonly reason: "account-deleted" | "user-disabled"; readonly userId: string },
): Promise<void> {
  const deps = depsOf(container)
  if (event.reason === "account-deleted") {
    await deleteForProvider(deps, event.userId)
    return
  }
  await disableForProvider(deps, event.userId)
}

/** The jobs: scopeless (an account and a session belong to no organization), scheduled by the worker. */
export const ACCOUNT_JOBS: Record<string, JobDef<unknown>> = {
  [DELETION_SWEEP_JOB]: {
    payload: z.unknown(),
    handler: async (_payload, ctx) => {
      await sweepDeletions(depsOf(ctx.container, ctx.signal))
    },
  },
  [REVOCATION_JOB]: {
    payload: z.unknown(),
    handler: async (_payload, ctx) => {
      // Each row carries its own backoff, so the run is not what is retried; a run that left rows
      // waiting fails, which is the line the worker logs and an operator is alerted on.
      const sweep = await sweepSessionRevocations(revocationDepsOf(ctx.container, { warn: () => undefined }))
      if (sweep.waiting > 0) {
        throw new AppError({
          type: "/problems/account_revocations_waiting",
          title: "Session revocations are waiting",
          status: 503,
          code: "account_revocations_waiting",
          detail: `${sweep.waiting} session revocation(s) wait for a module's platform`,
          retryAfter: 60,
        })
      }
    },
  },
}