'use client'

import { CanonicalControl, BACKEND_URL } from './helpers'

export interface ControlFormData {
  [key: string]: unknown
}

interface CRUDDeps {
  selectedControl: CanonicalControl | null
  fullReload: () => Promise<void>
  reviewMode: boolean
  reviewIndex: number
  reviewItems: CanonicalControl[]
  setMode: (m: 'list' | 'detail' | 'create' | 'edit') => void
  setSelectedControl: (c: CanonicalControl | null) => void
  setReviewMode: (v: boolean) => void
  setReviewItems: (items: CanonicalControl[]) => void
  setReviewIndex: (i: number) => void
  setSaving: (v: boolean) => void
  setBulkProcessing: (v: boolean) => void
  reviewCount: number
  totalCount: number
  stateFilter: string
}

export function createCRUDHandlers(deps: CRUDDeps) {
  const {
    selectedControl, fullReload, reviewMode, reviewIndex, reviewItems,
    setMode, setSelectedControl, setReviewMode, setReviewItems, setReviewIndex,
    setSaving, setBulkProcessing, reviewCount, totalCount, stateFilter,
  } = deps

  const handleCreate = async (data: ControlFormData) => {
    setSaving(true)
    try {
      const res = await fetch(`${BACKEND_URL}?endpoint=create-control`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(data),
      })
      if (!res.ok) { const err = await res.json(); alert(`Fehler: ${err.error || err.details || 'Unbekannt'}`); return }
      await fullReload()
      setMode('list')
    } catch { alert('Netzwerkfehler') } finally { setSaving(false) }
  }

  const handleUpdate = async (data: ControlFormData) => {
    if (!selectedControl) return
    setSaving(true)
    try {
      const res = await fetch(`${BACKEND_URL}?endpoint=update-control&id=${selectedControl.control_id}`, {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(data),
      })
      if (!res.ok) { const err = await res.json(); alert(`Fehler: ${err.error || err.details || 'Unbekannt'}`); return }
      await fullReload()
      setSelectedControl(null)
      setMode('list')
    } catch { alert('Netzwerkfehler') } finally { setSaving(false) }
  }

  const handleDelete = async (controlId: string) => {
    if (!confirm(`Control ${controlId} wirklich loeschen?`)) return
    try {
      const res = await fetch(`${BACKEND_URL}?id=${controlId}`, { method: 'DELETE' })
      if (!res.ok && res.status !== 204) { alert('Fehler beim Loeschen'); return }
      await fullReload()
      setSelectedControl(null)
      setMode('list')
    } catch { alert('Netzwerkfehler') }
  }

  const handleReview = async (controlId: string, action: string) => {
    try {
      const res = await fetch(`${BACKEND_URL}?endpoint=review&id=${controlId}`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ action }),
      })
      if (res.ok) {
        await fullReload()
        if (reviewMode) {
          const remaining = reviewItems.filter(c => c.control_id !== controlId)
          setReviewItems(remaining)
          if (remaining.length > 0) {
            const nextIdx = Math.min(reviewIndex, remaining.length - 1)
            setReviewIndex(nextIdx)
            setSelectedControl(remaining[nextIdx])
          } else { setReviewMode(false); setSelectedControl(null); setMode('list') }
        } else { setSelectedControl(null); setMode('list') }
      }
    } catch { /* ignore */ }
  }

  const handleBulkReject = async (sourceState: string) => {
    const count = stateFilter === sourceState ? totalCount : reviewCount
    if (!confirm(`Alle ${count} Controls mit Status "${sourceState}" auf "deprecated" setzen? Diese Aktion kann nicht rueckgaengig gemacht werden.`)) return
    setBulkProcessing(true)
    try {
      const res = await fetch(`${BACKEND_URL}?endpoint=bulk-review`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ release_state: sourceState, action: 'reject' }),
      })
      if (res.ok) {
        const data = await res.json()
        alert(`${data.affected_count} Controls auf "deprecated" gesetzt.`)
        await fullReload()
      } else { const err = await res.json(); alert(`Fehler: ${err.error || err.details || 'Unbekannt'}`) }
    } catch { alert('Netzwerkfehler') } finally { setBulkProcessing(false) }
  }

  return { handleCreate, handleUpdate, handleDelete, handleReview, handleBulkReject }
}