import React, { useState } from 'react'
import MasonryGallery from '../../gallery/MasonryGallery'

const SORT_OPTIONS = [
  { value: 'latest',    label: 'Latest' },
  { value: 'trending',  label: 'Trending' },
  { value: 'rising',    label: 'Rising' },
  { value: 'views',     label: 'Most Viewed' },
  { value: 'favs',      label: 'Most Favourited' },
]

/**
 * Featured artworks horizontal scroll strip.
 */
function FeaturedStrip({ featuredArtworks }) {
  if (!featuredArtworks?.length) return null

  return (
    <div className="mb-7 rounded-2xl border border-white/10 bg-white/[0.02] p-4 md:p-5">
      <h2 className="text-xs font-semibold uppercase tracking-widest text-slate-400 mb-3 flex items-center gap-2">
        <i className="fa-solid fa-star text-amber-400 fa-fw" />
        Featured
      </h2>
      <div className="flex gap-4 overflow-x-auto pb-2 scrollbar-hide snap-x snap-mandatory">
        {featuredArtworks.slice(0, 5).map((art) => (
          <a
            key={art.id}
            href={`/art/${art.id}/${slugify(art.name)}`}
            className="group shrink-0 snap-start w-56 md:w-64"
          >
            <div className="overflow-hidden rounded-xl ring-1 ring-white/10 bg-black/30 aspect-[5/3] hover:ring-sky-400/40 transition-all">
              <img
                src={art.thumb}
                alt={art.name}
                className="w-full h-full object-cover transition-transform duration-300 group-hover:scale-[1.03]"
                loading="lazy"
              />
            </div>
            <p className="text-sm text-slate-300 mt-2 truncate group-hover:text-white transition-colors">
              {art.name}
            </p>
            {art.label && (
              <p className="text-[11px] text-slate-600 truncate">{art.label}</p>
            )}
          </a>
        ))}
      </div>
    </div>
  )
}

function slugify(str) {
  return (str || '').toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/^-|-$/g, '')
}

/**
 * TabArtworks
 * Features: sort selector, featured strip, masonry-style artwork grid,
 * skeleton loading, empty state, load-more pagination.
 */
export default function TabArtworks({ artworks, featuredArtworks, username, isActive }) {
  const [sort, setSort] = useState('latest')
  const [items, setItems] = useState(artworks?.data ?? artworks ?? [])
  const [nextCursor, setNextCursor] = useState(artworks?.next_cursor ?? null)

  const handleSort = async (newSort) => {
    setSort(newSort)
    setItems([])
    try {
      const res = await fetch(`/api/profile/${encodeURIComponent(username)}/artworks?sort=${newSort}`, {
        headers: { Accept: 'application/json' },
      })
      if (res.ok) {
        const data = await res.json()
        setItems(data.data ?? data)
        setNextCursor(data.next_cursor ?? null)
      }
    } catch (_) {}
  }

  return (
    <div
      id="tabpanel-artworks"
      role="tabpanel"
      aria-labelledby="tab-artworks"
      className="pt-6"
    >
      {/* Featured strip */}
      <FeaturedStrip featuredArtworks={featuredArtworks} />

      {/* Sort bar */}
      <div className="flex items-center gap-3 mb-5 flex-wrap">
        <span className="text-xs text-slate-500 uppercase tracking-wider font-semibold">Sort</span>
        <div className="flex gap-1 flex-wrap">
          {SORT_OPTIONS.map((opt) => (
            <button
              key={opt.value}
              onClick={() => handleSort(opt.value)}
              className={`px-3 py-1.5 rounded-lg text-xs font-medium transition-all ${
                sort === opt.value
                  ? 'bg-sky-500/20 text-sky-300 ring-1 ring-sky-400/40'
                  : 'text-slate-400 hover:text-white hover:bg-white/5'
              }`}
            >
              {opt.label}
            </button>
          ))}
        </div>
      </div>

      {/* Shared masonry gallery component reused from discover/explore */}
      <MasonryGallery
        key={`profile-${username}-${sort}`}
        artworks={items}
        galleryType="profile"
        cursorEndpoint={`/api/profile/${encodeURIComponent(username)}/artworks?sort=${encodeURIComponent(sort)}`}
        initialNextCursor={nextCursor}
        limit={24}
        gridClassName="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-4"
      />
    </div>
  )
}
