'use client'

interface GuidelineItem {
  req_id: string
  title: string
  annex_anchor: string
  measures: { id: string; name: string }[]
  source?: string
}
interface EvidenceItem { key: string; label: string }
export interface ReadinessResult {
  in_scope: boolean
  classification: string
  rationale: string[]
  conformity_path_hint: string
  regulations: string[]
  guideline: { code: GuidelineItem[]; process: GuidelineItem[]; document: GuidelineItem[] }
  counts: { code: number; process: number; document: number }
  total_effort_days: number
  deadlines: { date: string; label: string }[]
  verdict?: {
    tier: string
    label: string
    in_scope: boolean
    market_pull: boolean
    cra_class: string
    cutoff: string
    reasons: string[]
  }
  maturity?: { pct: number; present: EvidenceItem[]; missing: EvidenceItem[]; total: number }
  digital_elements?: string[]
  producer_type?: string
}

const CLASS_LABEL: Record<string, string> = {
  CRITICAL: 'Kritisch', IMPORTANT_II: 'Wichtig (Klasse II)', IMPORTANT_I: 'Wichtig (Klasse I)',
  STANDARD: 'Standard', NOT_IN_SCOPE: 'Nicht im CRA-Anwendungsbereich',
}
const BUCKETS: { key: 'code' | 'process' | 'document'; label: string; hint: string }[] = [
  { key: 'code', label: 'Code / Technik', hint: 'im Produkt umzusetzen' },
  { key: 'process', label: 'Prozesse', hint: 'organisatorisch zu etablieren' },
  { key: 'document', label: 'Dokumentation', hint: 'nachzuweisen / beizulegen' },
]
// Neutral, Co-Pilot tone — no panic red. zwingend = attention (amber), ratsam =
// advisory (blue), nicht betroffen = positive (emerald).
const TIER_STYLE: Record<string, string> = {
  zwingend: 'border-amber-300 bg-amber-50 dark:bg-amber-900/20 text-amber-900 dark:text-amber-200',
  ratsam: 'border-blue-300 bg-blue-50 dark:bg-blue-900/20 text-blue-900 dark:text-blue-200',
  nicht_betroffen: 'border-emerald-300 bg-emerald-50 dark:bg-emerald-900/20 text-emerald-900 dark:text-emerald-200',
}

export function ReadinessResultView({ result, onCreateProject }: { result: ReadinessResult; onCreateProject?: () => void }) {
  const v = result.verdict
  const m = result.maturity

  return (
    <div className="mt-5 space-y-4">
      {/* Neutrales Verdict — Rechtspflicht vs. Marktzwang */}
      {v && (
        <div className={`rounded-xl border p-4 ${TIER_STYLE[v.tier] || TIER_STYLE.ratsam}`}>
          <div className="flex flex-wrap items-center gap-2">
            <span className="text-base font-semibold">{v.label}</span>
            {v.market_pull && (
              <span className="rounded bg-white/60 dark:bg-black/20 px-2 py-0.5 text-xs font-medium">Markt-Druck: Kunden fordern Nachweise</span>
            )}
          </div>
          <ul className="mt-2 space-y-0.5 text-sm">
            {v.reasons.map((r, i) => <li key={i}>• {r}</li>)}
          </ul>
          <p className="mt-2 text-xs opacity-80">
            Hinweis: Maßgeblich ist das <strong>Inverkehrbringen</strong> (ab {v.cutoff}), nicht der Entwicklungszeitpunkt.
            Das ist eine erste Einschätzung zur Klärung mit DSB/Anwalt — keine Rechtsberatung.
          </p>
        </div>
      )}

      {/* Reifegrad + digitale Elemente */}
      <div className="grid md:grid-cols-2 gap-3">
        {m && (
          <div className="rounded-lg border border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 p-3">
            <div className="flex items-baseline justify-between">
              <h3 className="text-sm font-semibold text-gray-800 dark:text-gray-200">Reifegrad (CRA-Nachweise)</h3>
              <span className="text-2xl font-bold text-gray-900 dark:text-gray-100">{m.pct}%</span>
            </div>
            <div className="mt-1 h-2 w-full overflow-hidden rounded-full bg-gray-200 dark:bg-gray-700">
              <div className="h-2 bg-emerald-500" style={{ width: `${m.pct}%` }} />
            </div>
            {m.missing.length > 0 && (
              <div className="mt-2">
                <p className="text-xs text-gray-500 mb-1">Fehlende Nachweise:</p>
                <ul className="space-y-0.5">
                  {m.missing.map((e) => (
                    <li key={e.key} className="text-xs text-gray-700 dark:text-gray-300">• {e.label}</li>
                  ))}
                </ul>
              </div>
            )}
          </div>
        )}
        {result.digital_elements && result.digital_elements.length > 0 && (
          <div className="rounded-lg border border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 p-3">
            <h3 className="text-sm font-semibold text-gray-800 dark:text-gray-200">
              Gefundene digitale Elemente <span className="text-gray-400 font-normal">({result.digital_elements.length})</span>
            </h3>
            <div className="mt-2 flex flex-wrap gap-1.5">
              {result.digital_elements.map((d) => (
                <span key={d} className="rounded bg-gray-100 dark:bg-gray-700 text-gray-700 dark:text-gray-200 px-2 py-0.5 text-xs">{d}</span>
              ))}
            </div>
          </div>
        )}
      </div>

      {/* Einstufung + Pflichten-Übersicht (wie bisher) */}
      {result.in_scope && (
        <>
          <div className="flex flex-wrap items-center gap-2">
            <span className="text-sm text-gray-600 dark:text-gray-300">CRA-Einstufung:</span>
            <span className="rounded px-2 py-0.5 text-xs font-semibold bg-purple-100 text-purple-700 dark:bg-purple-900/40 dark:text-purple-300">
              {CLASS_LABEL[result.classification] || result.classification}
            </span>
            <span className="text-xs text-gray-500">· Konformität: {result.conformity_path_hint}</span>
            {result.regulations.map((r) => (
              <span key={r} className="rounded px-1.5 py-0.5 text-[10px] font-medium bg-blue-100 text-blue-700 dark:bg-blue-900/40 dark:text-blue-300">{r}</span>
            ))}
          </div>
          <p className="text-xs text-gray-500">
            {result.counts.code + result.counts.process + result.counts.document} Pflichten · grobe Schätzung
            ~{result.total_effort_days} Personentage.
          </p>
          <div className="grid md:grid-cols-3 gap-3">
            {BUCKETS.map((b) => (
              <div key={b.key} className="rounded-lg border border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 p-3">
                <h3 className="text-sm font-semibold text-gray-800 dark:text-gray-200">{b.label}
                  <span className="ml-1 text-[10px] font-normal text-gray-400">({result.counts[b.key]} · {b.hint})</span>
                </h3>
                <ul className="mt-2 space-y-1.5">
                  {result.guideline[b.key].map((it) => (
                    <li key={it.req_id} className="text-[11px] text-gray-600 dark:text-gray-300">
                      {it.source === 'Maschinen-VO' && (
                        <span className="inline-block rounded bg-indigo-100 text-indigo-700 dark:bg-indigo-900/40 dark:text-indigo-300 px-1 py-0.5 text-[9px] font-medium mr-1">MaschVO</span>
                      )}
                      <span className="font-medium text-gray-800 dark:text-gray-200">{it.title}</span>
                      <span className="text-gray-400"> · {it.annex_anchor}</span>
                    </li>
                  ))}
                </ul>
              </div>
            ))}
          </div>
          <div className="flex flex-wrap gap-3 text-[11px] text-gray-500">
            <span className="font-medium text-gray-600 dark:text-gray-300">CRA-Fristen:</span>
            {result.deadlines.map((d) => (
              <span key={d.date}><span className="font-mono">{d.date}</span> {d.label}</span>
            ))}
          </div>
        </>
      )}

      {onCreateProject && (
        <button onClick={onCreateProject}
          className="rounded bg-purple-600 hover:bg-purple-700 text-white text-sm px-4 py-2">
          Projekt anlegen & Cyber-Akte aufbauen — wir setzen es mit Ihnen um
        </button>
      )}
    </div>
  )
}