'use client'

// IdeaList — top-level lijstpagina voor /ideas.
// - Strikt user_id-only data (server haalt al; client filtert binnen die set).
// - Filters: zoeken op titel, product-dropdown, status-multiselect.
// - Klik op rij navigeert naar /ideas/[id]. Acties (Grill / Make Plan /
//   Materialiseer) staan in components/ideas/idea-row-actions.tsx (T-508).
// - DemoTooltip rondom muteer-acties; bulk-archive blijft achter feature-flag
//   in T-508 en latere stories.

import { useMemo, useState, useTransition } from 'react'
import { useRouter } from 'next/navigation'
import { Plus, ArrowUp, ArrowDown, ArrowUpDown } from 'lucide-react'
import { toast } from 'sonner'

import { cn } from '@/lib/utils'
import { Button } from '@/components/ui/button'
import { Input } from '@/components/ui/input'
import { Textarea } from '@/components/ui/textarea'
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from '@/components/ui/table'
import { DemoTooltip } from '@/components/shared/demo-tooltip'
import { getIdeaStatusBadge } from '@/lib/idea-status-colors'
import type { IdeaStatusApi } from '@/lib/idea-status'
import type { IdeaDto } from '@/lib/idea-dto'
import { createIdeaAction, archiveIdeaAction } from '@/actions/ideas'
import { IdeaRowActions } from '@/components/ideas/idea-row-actions'

// Reverse mapping voor het renderen van de status-badge — DTO bevat lowercase
// API-strings, het badge-helper verwacht DB-enum.
const API_TO_DB: Record<IdeaStatusApi, Parameters<typeof getIdeaStatusBadge>[0]> = {
  draft: 'DRAFT',
  grilling: 'GRILLING',
  grill_failed: 'GRILL_FAILED',
  grilled: 'GRILLED',
  planning: 'PLANNING',
  plan_failed: 'PLAN_FAILED',
  plan_ready: 'PLAN_READY',
  planned: 'PLANNED',
}

interface ProductOption {
  id: string
  name: string
  repo_url: string | null
}

type SortKey = 'code' | 'title' | 'product' | 'status'

interface IdeaListProps {
  ideas: IdeaDto[]
  products: ProductOption[]
  isDemo: boolean
}

const STATUS_FILTERS: { value: IdeaStatusApi; label: string }[] = [
  { value: 'draft', label: 'Concept' },
  { value: 'grilling', label: 'Grillen' },
  { value: 'grilled', label: 'Gegrilld' },
  { value: 'planning', label: 'Plannen' },
  { value: 'plan_ready', label: 'Plan klaar' },
  { value: 'planned', label: 'Gepland' },
  { value: 'grill_failed', label: 'Grill mislukt' },
  { value: 'plan_failed', label: 'Plan mislukt' },
]

const STATUS_SORT_ORDER: Record<IdeaStatusApi, number> = {
  draft: 0, grilling: 1, grilled: 2, planning: 3,
  plan_ready: 4, planned: 5, grill_failed: 6, plan_failed: 7,
}

function SortHeader({
  col,
  label,
  sortKey,
  sortDir,
  onSort,
}: {
  col: SortKey
  label: string
  sortKey: SortKey
  sortDir: 'asc' | 'desc'
  onSort: (col: SortKey) => void
}) {
  const active = sortKey === col
  const Icon = active
    ? sortDir === 'asc' ? ArrowUp : ArrowDown
    : ArrowUpDown
  return (
    <button
      type="button"
      onClick={() => onSort(col)}
      className={cn(
        'flex items-center gap-1 text-xs font-medium hover:text-foreground transition-colors',
        active ? 'text-foreground' : 'text-muted-foreground'
      )}
    >
      {label}
      <Icon className="size-3" />
    </button>
  )
}

export function IdeaList({ ideas, products, isDemo }: IdeaListProps) {
  const router = useRouter()
  const [isPending, startTransition] = useTransition()

  // Filter state
  const [search, setSearch] = useState('')
  const [productFilter, setProductFilter] = useState<string>('all')
  const [statusFilter, setStatusFilter] = useState<Set<IdeaStatusApi>>(new Set())

  // Sort state
  const [sortKey, setSortKey] = useState<SortKey>('code')
  const [sortDir, setSortDir] = useState<'asc' | 'desc'>('desc')

  // Create-form state
  const [showCreate, setShowCreate] = useState(false)
  const [newTitle, setNewTitle] = useState('')
  const [newDescription, setNewDescription] = useState('')
  const [newProductId, setNewProductId] = useState<string>('')

  // Quick-idea form state
  const [showQuick, setShowQuick] = useState(false)
  const [quickTitle, setQuickTitle] = useState('')
  const [quickDescription, setQuickDescription] = useState('')

  const filtered = useMemo(() => {
    const q = search.trim().toLowerCase()
    const result = ideas.filter((idea) => {
      if (q && !idea.title.toLowerCase().includes(q)) return false
      if (productFilter !== 'all') {
        if (productFilter === 'none') {
          if (idea.product_id !== null) return false
        } else {
          const matchesPrimary = idea.product_id === productFilter
          const matchesSecondary =
            idea.secondary_products?.some((sp) => sp.product_id === productFilter) ?? false
          if (!matchesPrimary && !matchesSecondary) return false
        }
      }
      if (statusFilter.size > 0 && !statusFilter.has(idea.status)) return false
      return true
    })
    const dir = sortDir === 'asc' ? 1 : -1
    return [...result].sort((a, b) => {
      switch (sortKey) {
        case 'code': return dir * a.code.localeCompare(b.code)
        case 'title': return dir * a.title.localeCompare(b.title)
        case 'product': return dir * (a.product?.name ?? '').localeCompare(b.product?.name ?? '')
        case 'status': return dir * a.status.localeCompare(b.status)
      }
    })
  }, [ideas, search, productFilter, statusFilter, sortKey, sortDir])

  const sorted = useMemo(() => {
    return [...filtered].sort((a, b) => {
      let cmp = 0
      if (sortKey === 'code') {
        cmp = (a.code ?? '').localeCompare(b.code ?? '', 'nl', { numeric: true })
      } else if (sortKey === 'title') {
        cmp = a.title.localeCompare(b.title, 'nl')
      } else if (sortKey === 'product') {
        const aN = a.product?.name ?? ''
        const bN = b.product?.name ?? ''
        if (!aN && bN) return sortDir === 'asc' ? 1 : -1
        if (aN && !bN) return sortDir === 'asc' ? -1 : 1
        cmp = aN.localeCompare(bN, 'nl')
      } else {
        cmp = (STATUS_SORT_ORDER[a.status] ?? 99) - (STATUS_SORT_ORDER[b.status] ?? 99)
      }
      return sortDir === 'asc' ? cmp : -cmp
    })
  }, [filtered, sortKey, sortDir])

  function handleSort(col: SortKey) {
    if (sortKey === col) {
      setSortDir((d) => (d === 'asc' ? 'desc' : 'asc'))
    } else {
      setSortKey(col)
      setSortDir('asc')
    }
  }

  function toggleStatus(s: IdeaStatusApi) {
    setStatusFilter((prev) => {
      const next = new Set(prev)
      if (next.has(s)) next.delete(s)
      else next.add(s)
      return next
    })
  }

  function handleCreate() {
    if (isDemo) return
    const title = newTitle.trim()
    if (!title) {
      toast.error('Titel is verplicht')
      return
    }
    startTransition(async () => {
      const r = await createIdeaAction({
        title,
        description: newDescription.trim() || null,
        product_id: newProductId || null,
      })
      if ('error' in r) {
        toast.error(r.error)
        return
      }
      toast.success(`Idee aangemaakt (${r.data?.code})`)
      setNewTitle('')
      setNewDescription('')
      setNewProductId('')
      setShowCreate(false)
      router.refresh()
    })
  }

  function handleQuickCreate() {
    if (isDemo) return
    const title = quickTitle.trim()
    if (!title) {
      toast.error('Titel is verplicht')
      return
    }
    startTransition(async () => {
      const r = await createIdeaAction({ title, description: quickDescription.trim() || null, product_id: null })
      if ('error' in r) {
        toast.error(r.error)
        return
      }
      toast.success(`Idee aangemaakt (${r.data?.code})`)
      setQuickTitle('')
      setQuickDescription('')
      setShowQuick(false)
      router.refresh()
    })
  }

  function handleArchive(id: string) {
    if (isDemo) return
    startTransition(async () => {
      const r = await archiveIdeaAction(id)
      if ('error' in r) {
        toast.error(r.error)
        return
      }
      toast.success('Idee gearchiveerd')
      router.refresh()
    })
  }

  return (
    <div className="space-y-4">
      {/* Top-bar: search + nieuw-knop */}
      <div className="flex flex-wrap items-center gap-3">
        <Input
          value={search}
          onChange={(e) => setSearch(e.target.value)}
          placeholder="Zoek op titel..."
          className="max-w-sm"
        />
        <select
          value={productFilter}
          onChange={(e) => setProductFilter(e.target.value)}
          className="h-9 rounded-md border border-input bg-background px-3 text-sm"
        >
          <option value="all">Alle producten</option>
          <option value="none">Geen product</option>
          {products.map((p) => (
            <option key={p.id} value={p.id}>
              {p.name}
            </option>
          ))}
        </select>
        <div className="ml-auto flex items-center gap-2">
          <DemoTooltip show={isDemo}>
            <Button
              size="sm"
              variant="outline"
              onClick={() => setShowQuick((v) => !v)}
              disabled={isDemo || isPending}
            >
              <Plus className="size-4 mr-1" />
              Snel idee
            </Button>
          </DemoTooltip>
          <DemoTooltip show={isDemo}>
            <Button
              size="sm"
              onClick={() => setShowCreate((v) => !v)}
              disabled={isDemo || isPending}
            >
              <Plus className="size-4 mr-1" />
              Nieuw idee
            </Button>
          </DemoTooltip>
        </div>
      </div>

      {/* Status-chips als multi-select filter */}
      <div className="flex flex-wrap gap-2">
        {STATUS_FILTERS.map((s) => {
          const active = statusFilter.has(s.value)
          return (
            <button
              key={s.value}
              type="button"
              onClick={() => toggleStatus(s.value)}
              className={`rounded-full border px-2.5 py-0.5 text-xs transition-colors ${
                active
                  ? 'bg-primary text-on-primary border-primary'
                  : 'bg-background text-muted-foreground border-input hover:bg-muted'
              }`}
            >
              {s.label}
            </button>
          )
        })}
      </div>

      {/* Snel idee form — geen product-dropdown */}
      {showQuick && (
        <div className="rounded-md border border-input bg-surface-container p-4 space-y-3">
          <Input
            placeholder="Titel *"
            value={quickTitle}
            onChange={(e) => setQuickTitle(e.target.value)}
            onKeyDown={(e) => e.key === 'Enter' && handleQuickCreate()}
          />
          <Textarea
            placeholder="Beschrijving (optioneel)"
            value={quickDescription}
            onChange={(e) => setQuickDescription(e.target.value)}
            rows={2}
          />
          <div className="flex gap-2 justify-end">
            <Button size="sm" variant="ghost" onClick={() => setShowQuick(false)}>Annuleer</Button>
            <Button size="sm" onClick={handleQuickCreate} disabled={isPending || !quickTitle.trim()}>Opslaan</Button>
          </div>
        </div>
      )}

      {/* Inline create form */}
      {showCreate && (
        <div className="rounded-md border border-input bg-surface-container p-4 space-y-3">
          <Input
            value={newTitle}
            onChange={(e) => setNewTitle(e.target.value)}
            placeholder="Titel van het idee..."
            disabled={isPending}
          />
          <Textarea
            value={newDescription}
            onChange={(e) => setNewDescription(e.target.value)}
            placeholder="Korte beschrijving (optioneel)..."
            rows={3}
            disabled={isPending}
          />
          <select
            value={newProductId}
            onChange={(e) => setNewProductId(e.target.value)}
            className="h-9 w-full rounded-md border border-input bg-background px-3 text-sm"
            disabled={isPending}
          >
            <option value="">Geen product (kan later worden gekoppeld)</option>
            {products.map((p) => (
              <option key={p.id} value={p.id}>
                {p.name}
                {p.repo_url ? '' : ' (geen repo)'}
              </option>
            ))}
          </select>
          <div className="flex justify-end gap-2">
            <Button
              variant="outline"
              size="sm"
              onClick={() => setShowCreate(false)}
              disabled={isPending}
            >
              Annuleer
            </Button>
            <Button size="sm" onClick={handleCreate} disabled={isPending || !newTitle.trim()}>
              Aanmaken
            </Button>
          </div>
        </div>
      )}

      {/* Tabel */}
      {sorted.length === 0 ? (
        <p className="text-sm text-muted-foreground py-8 text-center">
          {ideas.length === 0
            ? 'Nog geen ideeën — start hierboven met "Nieuw idee".'
            : 'Geen ideeën die aan de filters voldoen.'}
        </p>
      ) : (
        <Table>
          <TableHeader>
            <TableRow>
              <TableHead className="w-24"><SortHeader col="code" label="Code" sortKey={sortKey} sortDir={sortDir} onSort={handleSort} /></TableHead>
              <TableHead><SortHeader col="title" label="Titel" sortKey={sortKey} sortDir={sortDir} onSort={handleSort} /></TableHead>
              <TableHead className="w-40"><SortHeader col="product" label="Product" sortKey={sortKey} sortDir={sortDir} onSort={handleSort} /></TableHead>
              <TableHead className="w-32"><SortHeader col="status" label="Status" sortKey={sortKey} sortDir={sortDir} onSort={handleSort} /></TableHead>
              <TableHead className="w-72">Acties</TableHead>
            </TableRow>
          </TableHeader>
          <TableBody>
            {sorted.map((idea) => {
              const badge = getIdeaStatusBadge(API_TO_DB[idea.status])
              return (
                <TableRow
                  key={idea.id}
                  className="cursor-pointer hover:bg-muted/50"
                  onClick={() => router.push(`/ideas/${idea.id}`)}
                >
                  <TableCell className="font-mono text-xs text-muted-foreground">
                    {idea.code}
                  </TableCell>
                  <TableCell className="font-medium">{idea.title}</TableCell>
                  <TableCell className="text-sm text-muted-foreground">
                    {idea.product?.name ?? <span className="italic">geen</span>}
                  </TableCell>
                  <TableCell>
                    <span
                      className={badge.classes + (badge.pulse ? ' animate-pulse' : '')}
                    >
                      {badge.label}
                    </span>
                  </TableCell>
                  <TableCell onClick={(e) => e.stopPropagation()}>
                    <IdeaRowActions
                      idea={idea}
                      isDemo={isDemo}
                      onArchive={() => handleArchive(idea.id)}
                    />
                  </TableCell>
                </TableRow>
              )
            })}
          </TableBody>
        </Table>
      )}
    </div>
  )
}
