import React, { useMemo, useState } from 'react'
import { Head, usePage } from '@inertiajs/react'
import ArtworkViewer from '../../components/viewer/ArtworkViewer'
import NovaSelect from '../../components/ui/NovaSelect'

function requestJson(url, { method = 'GET', body } = {}) {
  return fetch(url, {
    method,
    credentials: 'same-origin',
    headers: {
      Accept: 'application/json',
      'Content-Type': 'application/json',
      'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]')?.getAttribute('content') || '',
      'X-Requested-With': 'XMLHttpRequest',
    },
    body: body ? JSON.stringify(body) : undefined,
  }).then(async (response) => {
    const payload = await response.json().catch(() => ({}))
    if (!response.ok) {
      throw new Error(payload?.message || 'Request failed')
    }
    return payload
  })
}

function Badge({ children, tone = 'slate' }) {
  const tones = {
    slate: 'border-white/10 bg-white/[0.05] text-slate-200',
    amber: 'border-amber-300/20 bg-amber-400/10 text-amber-100',
    rose: 'border-rose-300/20 bg-rose-400/10 text-rose-100',
    emerald: 'border-emerald-300/20 bg-emerald-400/10 text-emerald-100',
    sky: 'border-sky-300/20 bg-sky-400/10 text-sky-100',
  }

  return <span className={`inline-flex items-center rounded-full border px-3 py-1 text-[11px] font-semibold uppercase tracking-[0.16em] ${tones[tone] || tones.slate}`}>{children}</span>
}

export default function ArtworkMaturityQueue() {
  const { props } = usePage()
  const [items, setItems] = useState(props.initialItems || [])
  const [stats, setStats] = useState(props.stats || {})
  const [status, setStatus] = useState(props.initialFilters?.status || 'suspected')
  const [aiAction, setAiAction] = useState(props.initialFilters?.ai_action || 'all')
  const [aiStatus, setAiStatus] = useState(props.initialFilters?.ai_status || 'all')
  const [busyId, setBusyId] = useState(null)
  const [noteById, setNoteById] = useState({})
  const [error, setError] = useState('')
  const [previewItem, setPreviewItem] = useState(null)

  const endpoints = props.endpoints || {}
  const filterOptions = props.filterOptions || {}
  const reviewActions = props.reviewActions || []

  function queueStatusKey(key) {
    return key === 'mature' ? 'reviewed' : key
  }

  async function load(nextStatus, nextAiAction = aiAction, nextAiStatus = aiStatus) {
    setStatus(nextStatus)
    setAiAction(nextAiAction)
    setAiStatus(nextAiStatus)
    setError('')
    try {
      const query = new URLSearchParams({
        status: nextStatus,
        ai_action: nextAiAction,
        ai_status: nextAiStatus,
      })
      const payload = await requestJson(`${endpoints.list}?${query.toString()}`)
      setItems(payload.data || [])
      setStats(payload.meta?.stats || {})
    } catch (loadError) {
      setError(loadError.message)
    }
  }

  async function review(itemId, action) {
    setBusyId(itemId)
    setError('')

    try {
      const payload = await requestJson(String(endpoints.reviewPattern || '').replace('__ARTWORK__', String(itemId)), {
        method: 'POST',
        body: {
          action,
          note: noteById[itemId] || '',
        },
      })

      setStats(payload.stats || {})
      setItems((current) => current.filter((item) => item.id !== itemId).concat(status === 'reviewed' ? [payload.artwork] : []))

      if (status !== 'reviewed') {
        setItems((current) => current.filter((item) => item.id !== itemId))
      }
    } catch (reviewError) {
      setError(reviewError.message)
    } finally {
      setBusyId(null)
    }
  }

  const statusSummary = useMemo(() => [
    { key: 'suspected', label: 'Suspected', value: Number(stats.suspected || 0) },
    { key: 'audit', label: 'Audit candidates', value: Number(stats.audit || 0) },
    { key: 'reviewed', label: 'Reviewed', value: Number(stats.reviewed || 0) },
    { key: 'mature', label: 'Marked mature', value: Number(stats.mature || 0) },
  ], [stats])

  return (
    <div className="mx-auto max-w-7xl px-4 pb-16 pt-8 sm:px-6 lg:px-8">
      <Head title="Artwork Maturity Queue" />

      <section className="rounded-[32px] border border-white/10 bg-[radial-gradient(circle_at_top_left,rgba(251,191,36,0.16),transparent_36%),linear-gradient(180deg,rgba(15,23,42,0.96),rgba(2,6,23,0.88))] p-6 shadow-[0_24px_70px_rgba(2,6,23,0.32)]">
        <div className="flex flex-col gap-4 lg:flex-row lg:items-end lg:justify-between">
          <div>
            <p className="text-[11px] font-semibold uppercase tracking-[0.28em] text-amber-200/80">Moderator surface</p>
            <h1 className="mt-3 text-3xl font-semibold tracking-[-0.04em] text-white">Artwork maturity review</h1>
            <p className="mt-2 max-w-3xl text-sm leading-relaxed text-slate-300">Review uploads where the uploader declaration and AI suspicion do not match, plus legacy artworks detected by the non-mutating thumbnail audit. Audit candidates stay read-only until a moderator confirms the final maturity state.</p>
          </div>

          <div className="flex flex-wrap gap-3">
            {statusSummary.map((entry) => (
              (() => {
                const queueKey = queueStatusKey(entry.key)

                return (
              <button
                key={entry.key}
                type="button"
                onClick={() => load(queueKey)}
                className={`rounded-2xl border px-4 py-3 text-left transition ${status === queueKey ? 'border-amber-300/30 bg-amber-400/10 text-white' : 'border-white/10 bg-white/[0.04] text-slate-300 hover:bg-white/[0.07]'}`}
              >
                <div className="text-[11px] font-semibold uppercase tracking-[0.18em]">{entry.label}</div>
                <div className="mt-1 text-2xl font-semibold tracking-tight">{entry.value.toLocaleString()}</div>
              </button>
                )
              })()
            ))}
          </div>
        </div>

        <div className="mt-5 grid gap-3 md:grid-cols-2">
          <div className="rounded-2xl border border-white/10 bg-white/[0.04] px-4 py-3 text-sm text-slate-300">
            <div className="text-[11px] font-semibold uppercase tracking-[0.18em] text-slate-400">AI action hint</div>
            <NovaSelect
              value={aiAction}
              onChange={(value) => load(status, value, aiStatus)}
              className="mt-2"
              options={(filterOptions.aiAction || []).map((option) => ({ value: option.value, label: option.label }))}
              searchable={false}
            />
          </div>

          <div className="rounded-2xl border border-white/10 bg-white/[0.04] px-4 py-3 text-sm text-slate-300">
            <div className="text-[11px] font-semibold uppercase tracking-[0.18em] text-slate-400">AI processing status</div>
            <NovaSelect
              value={aiStatus}
              onChange={(value) => load(status, aiAction, value)}
              className="mt-2"
              options={(filterOptions.aiStatus || []).map((option) => ({ value: option.value, label: option.label }))}
              searchable={false}
            />
          </div>
        </div>
      </section>

      {error ? <div className="mt-6 rounded-2xl border border-rose-300/20 bg-rose-400/10 px-4 py-3 text-sm text-rose-100">{error}</div> : null}

      <div className="mt-8 space-y-4">
        {items.length === 0 ? (
          <div className="rounded-[28px] border border-white/10 bg-white/[0.04] px-6 py-12 text-center text-slate-300">{status === 'audit' ? 'No legacy artworks are currently flagged by the thumbnail audit.' : 'No artworks are waiting in this queue.'}</div>
        ) : items.map((item) => (
          (() => {
            const evidence = item.audit || item.maturity || {}

            return (
          <article key={item.id} className="grid gap-5 rounded-[28px] border border-white/10 bg-[#08111d] p-5 shadow-[0_18px_48px_rgba(2,6,23,0.2)] lg:grid-cols-[280px_minmax(0,1fr)]">
            <button
              type="button"
              onClick={() => item.preview_image ? setPreviewItem(item) : null}
              className="group overflow-hidden rounded-[22px] border border-white/10 bg-slate-950/85 text-left transition hover:border-sky-300/30"
            >
              {item.thumbnail ? (
                <div className="relative flex min-h-[360px] items-center justify-center p-3">
                  <img src={item.thumbnail} alt={item.title} className="max-h-[480px] w-full object-contain" />
                  <div className="pointer-events-none absolute inset-x-3 bottom-3 flex items-center justify-between rounded-full border border-white/10 bg-[#07101bdd] px-3 py-2 text-[11px] font-semibold uppercase tracking-[0.16em] text-slate-100 opacity-0 transition group-hover:opacity-100">
                    <span>Preview full image</span>
                    <i className="fa-solid fa-expand text-[10px]" />
                  </div>
                </div>
              ) : <div className="min-h-[360px]" />}
            </button>

            <div>
              <div className="flex flex-wrap items-start justify-between gap-3">
                <div>
                  <div className="flex flex-wrap gap-2">
                    {item.audit ? <Badge tone="sky">audit candidate</Badge> : null}
                    <Badge tone={item.maturity?.is_flagged ? 'rose' : 'amber'}>{item.maturity?.status || 'unknown'}</Badge>
                    {item.maturity?.is_mature_effective ? <Badge tone="amber">effective mature</Badge> : <Badge tone="emerald">currently safe</Badge>}
                    {item.maturity?.source ? <Badge tone="sky">source: {String(item.maturity.source).replaceAll('_', ' ')}</Badge> : null}
                    {item.audit?.legacy_unset ? <Badge tone="slate">legacy unset</Badge> : null}
                    {evidence.ai_action_hint ? <Badge tone={evidence.ai_action_hint === 'flag_high' ? 'rose' : evidence.ai_action_hint === 'review' ? 'amber' : 'emerald'}>AI: {String(evidence.ai_action_hint).replaceAll('_', ' ')}</Badge> : null}
                    {evidence.ai_status ? <Badge tone="slate">status: {String(evidence.ai_status).replaceAll('_', ' ')}</Badge> : null}
                  </div>
                  <h2 className="mt-3 text-2xl font-semibold tracking-[-0.03em] text-white">{item.title}</h2>
                  <p className="mt-2 text-sm text-slate-300">{item.publisher} {item.category ? `• ${item.category}` : ''} {item.content_type ? `• ${item.content_type}` : ''}</p>
                </div>
                <div className="flex flex-wrap gap-2">
                  <a href={item.url} className="inline-flex items-center gap-2 rounded-full border border-white/10 bg-white/[0.04] px-4 py-2 text-xs font-semibold uppercase tracking-[0.14em] text-white transition hover:bg-white/[0.08]">
                    <i className="fa-solid fa-arrow-up-right-from-square text-[10px]" />
                    Open artwork
                  </a>
                  {item.admin_url ? (
                    <a href={item.admin_url} className="inline-flex items-center gap-2 rounded-full border border-amber-300/20 bg-amber-400/10 px-4 py-2 text-xs font-semibold uppercase tracking-[0.14em] text-amber-50 transition hover:bg-amber-400/15">
                      <i className="fa-solid fa-screwdriver-wrench text-[10px]" />
                      Open in cPad
                    </a>
                  ) : null}
                </div>
              </div>

              <div className="mt-4 flex flex-wrap gap-2">
                {Array.isArray(evidence.ai_labels) && evidence.ai_labels.length > 0 ? evidence.ai_labels.map((label) => <Badge key={`${item.id}-${label}`} tone="rose">{label}</Badge>) : <Badge tone="slate">no AI labels</Badge>}
              </div>

              <div className="mt-4 grid gap-4 md:grid-cols-3">
                <div className="rounded-2xl border border-white/10 bg-white/[0.04] px-4 py-3">
                  <div className="text-[11px] font-semibold uppercase tracking-[0.16em] text-slate-400">AI score</div>
                  <div className="mt-2 text-xl font-semibold text-white">{evidence.ai_score != null ? Number(evidence.ai_score).toFixed(4) : 'n/a'}</div>
                </div>
                <div className="rounded-2xl border border-white/10 bg-white/[0.04] px-4 py-3">
                  <div className="text-[11px] font-semibold uppercase tracking-[0.16em] text-slate-400">AI label</div>
                  <div className="mt-2 text-sm leading-relaxed text-slate-200">{evidence.ai_label || 'n/a'}</div>
                </div>
                <div className="rounded-2xl border border-white/10 bg-white/[0.04] px-4 py-3">
                  <div className="text-[11px] font-semibold uppercase tracking-[0.16em] text-slate-400">{item.audit ? 'Audit detected' : 'Published'}</div>
                  <div className="mt-2 text-sm text-slate-200">{item.audit?.detected_at ? new Date(item.audit.detected_at).toLocaleString() : item.published_at ? new Date(item.published_at).toLocaleString() : 'Draft / unavailable'}</div>
                </div>
              </div>

              <div className="mt-4 grid gap-4 md:grid-cols-3">
                <div className="rounded-2xl border border-white/10 bg-white/[0.04] px-4 py-3">
                  <div className="text-[11px] font-semibold uppercase tracking-[0.16em] text-slate-400">Confidence</div>
                  <div className="mt-2 text-sm text-slate-200">{evidence.ai_confidence != null ? Number(evidence.ai_confidence).toFixed(4) : 'n/a'}</div>
                </div>
                <div className="rounded-2xl border border-white/10 bg-white/[0.04] px-4 py-3">
                  <div className="text-[11px] font-semibold uppercase tracking-[0.16em] text-slate-400">Vision model</div>
                  <div className="mt-2 text-sm text-slate-200">{evidence.ai_model || 'n/a'}</div>
                </div>
                <div className="rounded-2xl border border-white/10 bg-white/[0.04] px-4 py-3">
                  <div className="text-[11px] font-semibold uppercase tracking-[0.16em] text-slate-400">Current DB state</div>
                  <div className="mt-2 text-sm leading-relaxed text-slate-200">{String(item.maturity?.source || 'legacy').replaceAll('_', ' ')} • {String(item.maturity?.status || 'clear').replaceAll('_', ' ')}</div>
                </div>
              </div>

              {evidence.ai_advisory ? (
                <div className="mt-4 rounded-2xl border border-amber-300/20 bg-amber-400/10 px-4 py-3 text-sm leading-relaxed text-amber-50">
                  <div className="text-[11px] font-semibold uppercase tracking-[0.16em] text-amber-100/80">AI advisory</div>
                  <div className="mt-2">{evidence.ai_advisory}</div>
                </div>
              ) : null}

              <div className="mt-5 rounded-[24px] border border-white/10 bg-black/20 p-4">
                <label className="text-[11px] font-semibold uppercase tracking-[0.18em] text-slate-400">Moderator note</label>
                <textarea
                  value={noteById[item.id] ?? item.review?.reviewer_note ?? ''}
                  onChange={(event) => setNoteById((current) => ({ ...current, [item.id]: event.target.value }))}
                  rows={3}
                  className="mt-3 w-full rounded-2xl border border-white/10 bg-slate-950/60 px-4 py-3 text-sm text-white outline-none transition focus:border-amber-300/40"
                  placeholder="Explain why you are confirming or changing the maturity state."
                />

                <div className="mt-4 flex flex-wrap gap-3">
                  {reviewActions.map((action) => (
                    <button
                      key={`${item.id}-${action.value}`}
                      type="button"
                      disabled={busyId === item.id}
                      onClick={() => review(item.id, action.value)}
                      className="inline-flex items-center gap-2 rounded-full border border-white/10 bg-white/[0.05] px-4 py-2 text-xs font-semibold uppercase tracking-[0.14em] text-white transition hover:bg-white/[0.09] disabled:cursor-not-allowed disabled:opacity-60"
                    >
                      {busyId === item.id ? 'Saving…' : action.label}
                    </button>
                  ))}
                </div>
              </div>
            </div>
          </article>
            )
          })()
        ))}
      </div>

      <ArtworkViewer
        isOpen={Boolean(previewItem)}
        onClose={() => setPreviewItem(null)}
        artwork={previewItem ? { title: previewItem.title, thumb: previewItem.thumbnail } : null}
        presentXl={previewItem?.preview_image ? { url: previewItem.preview_image } : null}
      />
    </div>
  )
}