'use client'

import { useEffect, useRef } from 'react'
import { useBacklogStore, type BacklogPbi, type BacklogStory, type BacklogTask } from '@/stores/backlog-store'
import { useBacklogRealtime } from '@/lib/realtime/use-backlog-realtime'
import { useProductWorkspaceStore } from '@/stores/product-workspace/store'
import type {
  BacklogPbi as WorkspacePbi,
  BacklogStory as WorkspaceStory,
  BacklogTask as WorkspaceTask,
  ProductBacklogSnapshot,
} from '@/stores/product-workspace/types'
import { logWorkspaceFingerprint } from '@/lib/realtime/dev-workspace-fingerprint'

interface InitialData {
  pbis: BacklogPbi[]
  storiesByPbi: Record<string, BacklogStory[]>
  tasksByStory: Record<string, BacklogTask[]>
}

interface BacklogHydrationWrapperProps {
  initialData: InitialData
  productId: string
  productName?: string
  children: React.ReactNode
}

function fingerprint(data: InitialData): string {
  const pbiPart = data.pbis.map((p) => `${p.id}:${p.status}:${p.priority}`).join(',')
  const storyPart = Object.entries(data.storiesByPbi)
    .flatMap(([, list]) => list.map((s) => `${s.id}:${s.status}:${s.sprint_id ?? 'null'}`))
    .join(',')
  const taskPart = Object.entries(data.tasksByStory)
    .flatMap(([, list]) => list.map((t) => `${t.id}:${t.status}`))
    .join(',')
  return `${pbiPart}|${storyPart}|${taskPart}`
}

// PBI-74 / T-844: dual-dispatch — naast de oude useBacklogStore vullen we nu
// ook de nieuwe product-workspace-store. De oude store blijft tijdelijk
// leidend voor componenten; in Story 3 verschuiven consumers één voor één.
// De runtime-payload bevat sort_order op PBI/Story (Prisma schema), ook al
// staat het niet op het oude InitialData type — daarom de cast hieronder.
function toWorkspaceSnapshot(
  data: InitialData,
  productId: string,
  productName: string | undefined,
): ProductBacklogSnapshot {
  return {
    product: { id: productId, name: productName ?? '' },
    pbis: data.pbis as unknown as WorkspacePbi[],
    storiesByPbi: data.storiesByPbi as unknown as Record<string, WorkspaceStory[]>,
    tasksByStory: data.tasksByStory as unknown as Record<string, WorkspaceTask[]>,
  }
}

export function BacklogHydrationWrapper({
  initialData,
  productId,
  productName,
  children,
}: BacklogHydrationWrapperProps) {
  const setInitialData = useBacklogStore((s) => s.setInitialData)
  const lastFingerprint = useRef<string>('')

  useEffect(() => {
    const fp = fingerprint(initialData)
    if (fp !== lastFingerprint.current) {
      lastFingerprint.current = fp
      setInitialData(initialData)
      // Dual-dispatch: nieuwe workspace-store schaduwt mee.
      useProductWorkspaceStore
        .getState()
        .hydrateSnapshot(toWorkspaceSnapshot(initialData, productId, productName))
      logWorkspaceFingerprint('hydrate')
    }
  }, [initialData, productId, productName, setInitialData])

  useBacklogRealtime(productId)

  return <>{children}</>
}