'use client';

import React, { useEffect } from 'react';
import type { AdCreativeCard, CreativeAsset } from '@/lib/ad-creatives-meta';
import { formatEur, formatNum } from '@/lib/metrics';
import { ImageIcon, Play, Maximize2, X, ExternalLink } from 'lucide-react';

export function proxiedMediaUrl(raw: string): string {
  if (!raw) return '';
  if (raw.startsWith('/api/')) return raw;
  return `/api/ad-tracker/media?url=${encodeURIComponent(raw)}`;
}

function adHeadlines(ad: AdCreativeCard): string[] {
  if (ad.headlines?.length) return ad.headlines;
  return (ad.headline || '')
    .split('\n')
    .map((s) => s.trim())
    .filter(Boolean);
}

function adDescriptions(ad: AdCreativeCard): string[] {
  if (ad.descriptions?.length) return ad.descriptions;
  return (ad.primaryText || '')
    .split('\n')
    .map((s) => s.trim())
    .filter(Boolean);
}

function adAssets(ad: AdCreativeCard): CreativeAsset[] {
  if (ad.assets?.length) return ad.assets;
  const out: CreativeAsset[] = [];
  const u = ad.imageUrl || ad.thumbnailUrl;
  if (u) out.push({ kind: 'image', url: u, label: 'preview' });
  if (ad.youtubeId) {
    out.push({
      kind: 'youtube',
      url: `https://i.ytimg.com/vi/${ad.youtubeId}/hqdefault.jpg`,
      youtubeId: ad.youtubeId,
      label: 'YOUTUBE',
    });
  }
  return out;
}

function previewUrlFor(ad: AdCreativeCard): string {
  const assets = adAssets(ad);
  const portrait = assets.find(
    (a) =>
      a.kind === 'image' &&
      /portrait|vertical|tall|TALL|PORTRAIT|story|4.?5|9.?16/i.test(
        a.label || ''
      )
  );
  const raw =
    portrait?.url ||
    ad.imageUrl ||
    ad.thumbnailUrl ||
    assets.find((a) => a.kind === 'image')?.url ||
    (ad.youtubeId
      ? `https://i.ytimg.com/vi/${ad.youtubeId}/hqdefault.jpg`
      : '') ||
    assets.find((a) => a.youtubeId)?.url ||
    '';
  return raw ? proxiedMediaUrl(raw) : '';
}

function MiniKpi({ label, value }: { label: string; value: string }) {
  return (
    <div className="rounded-lg border border-gray-200 bg-gray-50 px-2.5 py-2">
      <p className="text-[9px] uppercase tracking-wider text-gray-500">{label}</p>
      <p className="text-sm font-semibold text-gray-900 mt-0.5 tabular-nums">
        {value}
      </p>
    </div>
  );
}

export function CreativesGallery({
  platform,
  ads,
  loading,
  warning,
  onZoom,
}: {
  platform: 'meta' | 'google';
  ads: AdCreativeCard[];
  loading: boolean;
  warning?: string | null;
  onZoom: (ad: AdCreativeCard) => void;
}) {
  const filtered = ads.filter((a) => a.platform === platform);
  const platformWarning =
    warning
      ?.split(' · ')
      .find((w) =>
        platform === 'meta'
          ? /meta|token meta|sin ads meta/i.test(w)
          : /google|pmax|rsa|sin ads google|sin assets/i.test(w)
      ) || null;
  const shownWarning =
    filtered.length === 0 && warning
      ? platformWarning || (ads.length === 0 ? warning : null)
      : platformWarning && filtered.length === 0
        ? platformWarning
        : null;

  return (
    <section className="space-y-3">
      <div>
        <p className="text-[10px] uppercase tracking-wider text-gray-500">
          Creatividades · preview por anuncio
        </p>
        <h3 className="text-lg font-bold text-gray-900">
          {platform === 'meta' ? 'Meta Ads' : 'Google Ads'} · creatividades
        </h3>
        <p className="text-xs text-gray-500 mt-1">
          Preview vertical + textos. Pulsa Zoom para ver todas las piezas.
        </p>
      </div>
      {shownWarning ? (
        <p className="text-xs text-amber-400/90 border border-amber-500/20 rounded-lg px-3 py-2">
          {shownWarning}
        </p>
      ) : null}
      {loading ? (
        <p className="text-sm text-gray-500 py-8 text-center">
          Cargando creatividades…
        </p>
      ) : filtered.length === 0 ? (
        <p className="text-sm text-gray-500 py-8 text-center border border-dashed border-gray-200 rounded-xl">
          Sin creatividades para este periodo.
        </p>
      ) : (
        <div className="space-y-3">
          {filtered.map((ad) => (
            <CreativeCard
              key={`${ad.platform}-${ad.adId}`}
              ad={ad}
              onZoom={() => onZoom(ad)}
            />
          ))}
        </div>
      )}
    </section>
  );
}

function CreativeCard({
  ad,
  onZoom,
}: {
  ad: AdCreativeCard;
  onZoom: () => void;
}) {
  const preview = previewUrlFor(ad);
  const isVideo = ad.mediaType === 'video' || Boolean(ad.youtubeId);
  const headlines = adHeadlines(ad);
  const bodies = adDescriptions(ad);
  const assets = adAssets(ad);
  const extraCount = Math.max(0, assets.length - 1);

  return (
    <article className="grid gap-4 rounded-2xl border border-gray-200 bg-white p-4 md:grid-cols-[minmax(160px,220px)_1fr]">
      <button
        type="button"
        onClick={onZoom}
        className="relative mx-auto w-full max-w-[220px] overflow-hidden rounded-xl bg-gray-100 border border-gray-200 aspect-[4/5] flex items-center justify-center group"
      >
        {preview ? (
          // eslint-disable-next-line @next/next/no-img-element
          <img
            src={preview}
            alt={ad.adName}
            className="w-full h-full object-cover"
            loading="lazy"
          />
        ) : ad.platform === 'google' && headlines.length ? (
          <div className="w-full h-full p-4 space-y-2 text-left bg-gradient-to-b from-[#1a2332] to-[#0d121f] flex flex-col justify-center">
            <p className="text-[10px] uppercase tracking-wider text-sky-400">
              Google · {ad.mediaType || 'rsa'}
            </p>
            {headlines.slice(0, 3).map((h) => (
              <p
                key={h}
                className="text-sm font-semibold text-blue-300 leading-snug"
              >
                {h}
              </p>
            ))}
          </div>
        ) : (
          <div className="text-center text-gray-500 text-xs px-4">
            <ImageIcon className="w-8 h-8 mx-auto mb-2 opacity-40" />
            Sin preview
          </div>
        )}
        {isVideo && preview ? (
          <span className="absolute bottom-2 left-2 inline-flex items-center gap-1 rounded-full bg-black/70 px-2 py-1 text-[10px] text-white">
            <Play className="w-3 h-3" /> Vídeo
          </span>
        ) : null}
        {extraCount > 0 ? (
          <span className="absolute top-2 right-2 rounded-full bg-black/70 px-2 py-1 text-[10px] text-white">
            +{extraCount} assets
          </span>
        ) : null}
        <span className="absolute inset-x-0 bottom-0 translate-y-full group-hover:translate-y-0 transition-transform bg-black/75 text-white text-[11px] py-2 flex items-center justify-center gap-1">
          <Maximize2 className="w-3.5 h-3.5" /> Zoom
        </span>
      </button>
      <div className="min-w-0 space-y-3">
        <div>
          <div className="flex flex-wrap items-start justify-between gap-2">
            <h4 className="text-base font-semibold text-gray-900 leading-snug">
              {ad.adName || 'Sin nombre'}
            </h4>
            <div className="flex items-center gap-2">
              <span className="text-[10px] uppercase tracking-wider text-gray-500 border border-gray-200 px-2 py-0.5 rounded">
                {ad.status || ad.platform}
              </span>
              <button
                type="button"
                onClick={onZoom}
                className="inline-flex items-center gap-1 rounded-lg border border-brand-500/40 bg-brand-500/10 px-2.5 py-1 text-[11px] font-medium text-brand-700 hover:bg-brand-500/20"
              >
                <Maximize2 className="w-3.5 h-3.5" /> Zoom
              </button>
            </div>
          </div>
          <p className="text-xs text-gray-500 mt-1">{ad.campaignName || '—'}</p>
          {ad.adsetName ? (
            <p className="text-xs text-gray-400">Conjunto: {ad.adsetName}</p>
          ) : null}
          <div className="flex flex-wrap gap-1.5 mt-2">
            <span
              className={`rounded-full px-2 py-0.5 text-[10px] uppercase tracking-wide ${
                ad.platform === 'meta'
                  ? 'border border-violet-500/40 text-violet-300'
                  : 'border border-sky-500/40 text-sky-300'
              }`}
            >
              {ad.platform === 'meta' ? 'Meta' : 'Google'}
            </span>
            {ad.mediaType && ad.mediaType !== 'unknown' ? (
              <span className="rounded-full border border-gray-200 px-2 py-0.5 text-[10px] uppercase text-gray-400">
                {ad.mediaType}
              </span>
            ) : null}
            {assets.length > 0 ? (
              <span className="rounded-full border border-gray-200 px-2 py-0.5 text-[10px] text-gray-400">
                {assets.length} piezas
              </span>
            ) : null}
          </div>
        </div>
        {(headlines.length > 0 || bodies.length > 0) && (
          <div className="space-y-2 text-xs border border-gray-200 rounded-xl p-3 bg-gray-50">
            {headlines.length > 0 ? (
              <div>
                <p className="text-[9px] uppercase tracking-wider text-gray-500 mb-1">
                  Titulares
                </p>
                <ul className="space-y-1">
                  {headlines.slice(0, 4).map((h) => (
                    <li
                      key={h}
                      className="text-gray-800 font-medium leading-snug"
                    >
                      {h}
                    </li>
                  ))}
                  {headlines.length > 4 ? (
                    <li className="text-gray-500">+{headlines.length - 4} más</li>
                  ) : null}
                </ul>
              </div>
            ) : null}
            {bodies.length > 0 ? (
              <div>
                <p className="text-[9px] uppercase tracking-wider text-gray-500 mb-1">
                  Textos / descripciones
                </p>
                <ul className="space-y-1.5">
                  {bodies.slice(0, 3).map((b) => (
                    <li
                      key={b}
                      className="text-gray-400 leading-relaxed line-clamp-3"
                    >
                      {b}
                    </li>
                  ))}
                  {bodies.length > 3 ? (
                    <li className="text-gray-500">+{bodies.length - 3} más</li>
                  ) : null}
                </ul>
              </div>
            ) : null}
            {ad.cta ? (
              <p className="text-[10px] text-brand-700 uppercase tracking-wide">
                CTA · {ad.cta}
              </p>
            ) : null}
          </div>
        )}
        <div className="grid grid-cols-2 sm:grid-cols-4 gap-2">
          <MiniKpi label="Gasto" value={formatEur(ad.spend)} />
          <MiniKpi label="Clics" value={formatNum(ad.clicks)} />
          <MiniKpi label="Conv." value={formatNum(ad.conversions)} />
          <MiniKpi
            label="CPL"
            value={ad.cpl != null ? formatEur(ad.cpl) : '—'}
          />
        </div>
      </div>
    </article>
  );
}

export function CreativeZoomModal({
  ad,
  onClose,
}: {
  ad: AdCreativeCard;
  onClose: () => void;
}) {
  const headlines = adHeadlines(ad);
  const bodies = adDescriptions(ad);
  const longH = ad.longHeadlines || [];
  const assets = adAssets(ad);
  const images = assets.filter((a) => a.kind === 'image' || a.kind === 'logo');
  const videos = assets.filter((a) => a.kind === 'youtube' || a.kind === 'video');
  const main = previewUrlFor(ad);

  useEffect(() => {
    const onKey = (e: KeyboardEvent) => {
      if (e.key === 'Escape') onClose();
    };
    window.addEventListener('keydown', onKey);
    const prev = document.body.style.overflow;
    document.body.style.overflow = 'hidden';
    return () => {
      window.removeEventListener('keydown', onKey);
      document.body.style.overflow = prev;
    };
  }, [onClose]);

  return (
    <div
      className="fixed inset-0 z-[80] flex items-stretch justify-center bg-black/80 p-3 md:p-6"
      role="dialog"
      aria-modal="true"
      onClick={onClose}
    >
      <div
        className="relative flex w-full max-w-6xl flex-col overflow-hidden rounded-2xl border border-gray-200 bg-white shadow-2xl max-h-[95vh]"
        onClick={(e) => e.stopPropagation()}
      >
        <header className="flex items-start justify-between gap-3 border-b border-gray-200 px-4 py-3 md:px-6 shrink-0">
          <div className="min-w-0">
            <p className="text-[10px] uppercase tracking-wider text-gray-500">
              Zoom creatividades ·{' '}
              {ad.platform === 'meta' ? 'Meta Ads' : 'Google Ads'}
            </p>
            <h2 className="text-lg font-bold text-gray-900 truncate">
              {ad.adName || 'Anuncio'}
            </h2>
            <p className="text-xs text-gray-500 mt-0.5">
              {ad.campaignName}
              {ad.adsetName ? ` · ${ad.adsetName}` : ''}
            </p>
          </div>
          <button
            type="button"
            onClick={onClose}
            className="rounded-lg border border-gray-200 p-2 text-gray-600 hover:bg-gray-50"
            aria-label="Cerrar"
          >
            <X className="w-4 h-4" />
          </button>
        </header>

        <div className="flex-1 overflow-y-auto p-4 md:p-6 space-y-6">
          <div className="grid gap-6 lg:grid-cols-[minmax(220px,320px)_1fr]">
            <div className="space-y-3">
              <div className="relative mx-auto w-full max-w-[320px] overflow-hidden rounded-2xl border border-gray-200 bg-black aspect-[4/5]">
                {main ? (
                  // eslint-disable-next-line @next/next/no-img-element
                  <img
                    src={main}
                    alt={ad.adName}
                    className="w-full h-full object-cover"
                  />
                ) : (
                  <div className="flex h-full items-center justify-center text-gray-500 text-sm">
                    Sin preview
                  </div>
                )}
              </div>
              <div className="grid grid-cols-2 gap-2">
                <MiniKpi label="Gasto" value={formatEur(ad.spend)} />
                <MiniKpi label="Clics" value={formatNum(ad.clicks)} />
                <MiniKpi label="Conv." value={formatNum(ad.conversions)} />
                <MiniKpi
                  label="CPL"
                  value={ad.cpl != null ? formatEur(ad.cpl) : '—'}
                />
              </div>
              <div className="text-xs text-gray-500 space-y-1">
                <p>
                  Impresiones:{' '}
                  <span className="text-gray-600">
                    {formatNum(ad.impressions)}
                  </span>
                </p>
                <p>
                  Formato:{' '}
                  <span className="text-gray-600">{ad.mediaType || '—'}</span>
                </p>
                <p>
                  Estado:{' '}
                  <span className="text-gray-600">{ad.status || '—'}</span>
                </p>
                {ad.cta ? (
                  <p>
                    CTA: <span className="text-brand-700">{ad.cta}</span>
                  </p>
                ) : null}
                {ad.businessName ? (
                  <p>
                    Negocio:{' '}
                    <span className="text-gray-600">{ad.businessName}</span>
                  </p>
                ) : null}
                {ad.linkUrl ? (
                  <a
                    href={ad.linkUrl}
                    target="_blank"
                    rel="noreferrer"
                    className="inline-flex items-center gap-1 text-sky-400 hover:underline break-all"
                  >
                    <ExternalLink className="w-3 h-3 shrink-0" />
                    {ad.linkUrl}
                  </a>
                ) : null}
              </div>
            </div>

            <div className="space-y-5">
              {images.length > 0 ? (
                <section>
                  <h3 className="text-sm font-semibold text-gray-900 mb-2">
                    Imágenes y logos ({images.length})
                  </h3>
                  <div className="grid grid-cols-2 sm:grid-cols-3 gap-2">
                    {images.map((asset, i) => (
                      <figure
                        key={`${asset.url}-${i}`}
                        className="overflow-hidden rounded-xl border border-gray-200 bg-gray-100"
                      >
                        <div
                          className={
                            /PORTRAIT|TALL|vertical|story/i.test(
                              asset.label || ''
                            )
                              ? 'aspect-[4/5]'
                              : /SQUARE/i.test(asset.label || '')
                                ? 'aspect-square'
                                : 'aspect-video'
                          }
                        >
                          {/* eslint-disable-next-line @next/next/no-img-element */}
                          <img
                            src={proxiedMediaUrl(asset.url)}
                            alt={asset.label || `asset-${i}`}
                            className="w-full h-full object-cover"
                            loading="lazy"
                          />
                        </div>
                        {asset.label ? (
                          <figcaption className="px-2 py-1 text-[9px] uppercase tracking-wider text-gray-500 truncate">
                            {asset.label}
                            {asset.kind === 'logo' ? ' · logo' : ''}
                          </figcaption>
                        ) : null}
                      </figure>
                    ))}
                  </div>
                </section>
              ) : null}

              {videos.length > 0 ? (
                <section>
                  <h3 className="text-sm font-semibold text-gray-900 mb-2">
                    Vídeos ({videos.length})
                  </h3>
                  <div className="grid gap-3 sm:grid-cols-2">
                    {videos.map((v, i) => (
                      <div
                        key={`${v.youtubeId || v.url}-${i}`}
                        className="rounded-xl border border-gray-200 overflow-hidden bg-gray-100"
                      >
                        {v.youtubeId ? (
                          <div className="aspect-video">
                            <iframe
                              title={v.title || v.youtubeId}
                              src={`https://www.youtube.com/embed/${v.youtubeId}`}
                              className="w-full h-full"
                              allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
                              allowFullScreen
                            />
                          </div>
                        ) : v.url ? (
                          <div className="aspect-video relative">
                            {/* eslint-disable-next-line @next/next/no-img-element */}
                            <img
                              src={proxiedMediaUrl(v.url)}
                              alt={v.title || 'video'}
                              className="w-full h-full object-cover"
                            />
                            <span className="absolute bottom-2 left-2 inline-flex items-center gap-1 rounded-full bg-black/70 px-2 py-1 text-[10px] text-white">
                              <Play className="w-3 h-3" /> Vídeo
                            </span>
                          </div>
                        ) : null}
                        <p className="px-2 py-1.5 text-[10px] text-gray-400 truncate">
                          {v.title || v.youtubeId || v.label || 'Vídeo'}
                        </p>
                      </div>
                    ))}
                  </div>
                </section>
              ) : null}

              {headlines.length > 0 ? (
                <section>
                  <h3 className="text-sm font-semibold text-gray-900 mb-2">
                    Titulares ({headlines.length})
                  </h3>
                  <ul className="space-y-1.5 text-sm text-gray-800">
                    {headlines.map((h) => (
                      <li
                        key={h}
                        className="rounded-lg border border-gray-200 bg-gray-50 px-3 py-2"
                      >
                        {h}
                      </li>
                    ))}
                  </ul>
                </section>
              ) : null}

              {longH.length > 0 ? (
                <section>
                  <h3 className="text-sm font-semibold text-gray-900 mb-2">
                    Titulares largos ({longH.length})
                  </h3>
                  <ul className="space-y-1.5 text-sm text-gray-800">
                    {longH.map((h) => (
                      <li
                        key={h}
                        className="rounded-lg border border-gray-200 bg-gray-50 px-3 py-2"
                      >
                        {h}
                      </li>
                    ))}
                  </ul>
                </section>
              ) : null}

              {bodies.length > 0 ? (
                <section>
                  <h3 className="text-sm font-semibold text-gray-900 mb-2">
                    Textos / descripciones ({bodies.length})
                  </h3>
                  <ul className="space-y-2 text-sm text-gray-600">
                    {bodies.map((b) => (
                      <li
                        key={b}
                        className="rounded-lg border border-gray-200 bg-gray-50 px-3 py-2 leading-relaxed whitespace-pre-wrap"
                      >
                        {b}
                      </li>
                    ))}
                  </ul>
                </section>
              ) : null}
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}