import React from 'react'
import CollectionVisibilityBadge from './CollectionVisibilityBadge'

async function requestJson(url, { method = 'GET', body } = {}) {
  const response = await 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,
  })

  const payload = await response.json().catch(() => ({}))
  if (!response.ok) {
    const message = payload?.message || 'Request failed.'
    throw new Error(message)
  }

  return payload
}

function formatUpdated(value) {
  if (!value) return 'Updated recently'

  const date = new Date(value)
  if (Number.isNaN(date.getTime())) return 'Updated recently'

  return new Intl.DateTimeFormat(undefined, {
    month: 'short',
    day: 'numeric',
    year: 'numeric',
  }).format(date)
}

function StatPill({ icon, label, value }) {
  return (
    <span className="inline-flex items-center gap-1.5 rounded-full border border-white/10 bg-white/[0.05] px-2.5 py-1 text-[11px] font-medium text-slate-300">
      <i className={`fa-solid ${icon} text-[10px] text-slate-400`} />
      <span className="text-white">{value}</span>
      <span>{label}</span>
    </span>
  )
}

function CoverMedia({ collection, isOwner }) {
  const coverImage = collection?.cover_image
  const coverMaturity = !isOwner && collection?.cover_image_maturity ? collection.cover_image_maturity : null
  const shouldBlur = Boolean(coverMaturity?.should_blur)
  const isMature = Boolean(coverMaturity?.is_mature_effective)

  if (!coverImage) {
    return (
      <div className="flex aspect-[16/10] items-center justify-center bg-[linear-gradient(135deg,rgba(8,17,31,1),rgba(15,23,42,1),rgba(8,17,31,1))] text-slate-500">
        <i className="fa-solid fa-layer-group text-4xl" />
      </div>
    )
  }

  return (
    <div className="relative aspect-[16/10] overflow-hidden bg-slate-950">
      <img
        src={coverImage}
        alt={collection?.title || 'Collection cover'}
        className={`h-full w-full object-cover transition-[transform,filter] duration-500 group-hover:scale-[1.04] ${shouldBlur ? 'scale-[1.02] blur-xl' : ''}`}
        loading="lazy"
      />
      {isMature ? <div className="absolute left-3 top-3 rounded-full border border-amber-300/20 bg-black/60 px-3 py-1 text-[10px] font-semibold uppercase tracking-[0.16em] text-amber-100">Mature cover</div> : null}
      {shouldBlur ? <div className="absolute inset-x-3 bottom-3 rounded-full border border-amber-300/20 bg-black/60 px-3 py-1 text-[10px] font-semibold uppercase tracking-[0.16em] text-amber-100">Blurred by your settings</div> : null}
    </div>
  )
}

export default function CollectionCard({ collection, isOwner, onDelete, onToggleFeature, onMoveUp, onMoveDown, canMoveUp, canMoveDown, busy = false, saveContext = null, saveContextMeta = null }) {
  const [saved, setSaved] = React.useState(Boolean(collection?.saved))
  const [saveBusy, setSaveBusy] = React.useState(false)

  React.useEffect(() => {
    setSaved(Boolean(collection?.saved))
    setSaveBusy(false)
  }, [collection?.id, collection?.saved])

  function handleDelete(event) {
    event.preventDefault()
    event.stopPropagation()
    onDelete?.(collection)
  }

  function stop(event) {
    event.stopPropagation()
  }

  function handleToggleFeature(event) {
    event.preventDefault()
    event.stopPropagation()
    onToggleFeature?.(collection)
  }

  async function handleSaveToggle(event) {
    event.preventDefault()
    event.stopPropagation()

    if (saveBusy) return

    const targetUrl = saved ? collection?.unsave_url : collection?.save_url
    if (!targetUrl) {
      if (collection?.login_url) {
        window.location.assign(collection.login_url)
      }

      return
    }

    setSaveBusy(true)

    try {
      const payload = await requestJson(targetUrl, {
        method: saved ? 'DELETE' : 'POST',
        body: saved ? undefined : {
          context: saveContext,
          context_meta: saveContextMeta || undefined,
        },
      })

      setSaved(Boolean(payload?.saved))
    } catch (error) {
      window.console?.error?.(error)
    } finally {
      setSaveBusy(false)
    }
  }

  return (
    <a
      href={collection?.url || '#'}
      className={`group relative overflow-hidden rounded-[28px] border border-white/10 bg-white/[0.04] shadow-[0_22px_60px_rgba(2,6,23,0.22)] transition-all duration-200 hover:-translate-y-1 hover:border-sky-300/30 hover:bg-white/[0.06] ${busy ? 'opacity-70' : ''} lg:max-w-[360px] lg:mx-auto`}
    >
      <div className="absolute inset-0 bg-[radial-gradient(circle_at_top_left,rgba(56,189,248,0.12),transparent_34%),radial-gradient(circle_at_bottom_right,rgba(249,115,22,0.12),transparent_28%)] opacity-0 transition duration-300 group-hover:opacity-100" />
      <div className="relative">
        <CoverMedia collection={collection} isOwner={isOwner} />

        <div className="p-5">
          <div className="mb-3 flex flex-wrap items-center gap-2">
            {collection?.is_featured ? (
              <span className="inline-flex items-center rounded-full border border-amber-300/25 bg-amber-300/10 px-2.5 py-1 text-[10px] font-semibold uppercase tracking-[0.18em] text-amber-100">
                Featured
              </span>
            ) : null}
            {collection?.mode === 'smart' ? (
              <span className="inline-flex items-center rounded-full border border-sky-300/25 bg-sky-400/10 px-2.5 py-1 text-[10px] font-semibold uppercase tracking-[0.18em] text-sky-100">
                Smart
              </span>
            ) : null}
            {!isOwner && collection?.program_key ? (
              <span className="inline-flex items-center rounded-full border border-lime-300/25 bg-lime-400/10 px-2.5 py-1 text-[10px] font-semibold uppercase tracking-[0.18em] text-lime-100">
                Program · {collection.program_key}
              </span>
            ) : null}
            {!isOwner && collection?.partner_label ? (
              <span className="inline-flex items-center rounded-full border border-white/10 bg-white/[0.05] px-2.5 py-1 text-[10px] font-semibold uppercase tracking-[0.18em] text-slate-200">
                Partner · {collection.partner_label}
              </span>
            ) : null}
            {!isOwner && collection?.sponsorship_label ? (
              <span className="inline-flex items-center rounded-full border border-amber-300/20 bg-amber-300/10 px-2.5 py-1 text-[10px] font-semibold uppercase tracking-[0.18em] text-amber-100">
                Sponsor · {collection.sponsorship_label}
              </span>
            ) : null}
            {isOwner ? <CollectionVisibilityBadge visibility={collection?.visibility} /> : null}
          </div>

          <div className="flex items-start justify-between gap-3">
            <div className="min-w-0">
              <h3 className="truncate text-lg font-semibold tracking-[-0.03em] text-white">{collection?.title}</h3>
              {collection?.subtitle ? <p className="mt-1 truncate text-sm text-slate-300">{collection.subtitle}</p> : null}
              {collection?.owner?.name ? <p className="mt-1 truncate text-sm text-slate-400">Curated by {collection.owner.name}{collection?.owner?.username ? ` • @${collection.owner.username}` : ''}</p> : null}
              <p className="mt-1 text-[11px] font-semibold uppercase tracking-[0.18em] text-slate-400">
                {(collection?.artworks_count ?? 0).toLocaleString()} artworks
              </p>
            </div>
          </div>

          {collection?.description_excerpt ? (
            <p className="mt-3 line-clamp-2 text-sm leading-relaxed text-slate-300">{collection.description_excerpt}</p>
          ) : collection?.smart_summary ? (
            <p className="mt-3 line-clamp-2 text-sm leading-relaxed text-slate-300">{collection.smart_summary}</p>
          ) : null}

          <div className="mt-4 flex flex-wrap gap-2">
            <StatPill icon="fa-heart" label="likes" value={(collection?.likes_count ?? 0).toLocaleString()} />
            <StatPill icon="fa-bell" label="followers" value={(collection?.followers_count ?? 0).toLocaleString()} />
            {collection?.collaborators_count > 1 ? <StatPill icon="fa-user-group" label="curators" value={(collection?.collaborators_count ?? 0).toLocaleString()} /> : null}
          </div>

          <div className="mt-4 flex items-center justify-between gap-3 text-xs text-slate-400">
            <span>{collection?.is_featured ? 'Featured' : 'Updated'} {formatUpdated(collection?.featured_at || collection?.updated_at)}</span>
            <div className="flex items-center gap-2" onClick={stop}>
              {!isOwner && (collection?.save_url || collection?.unsave_url || collection?.login_url) ? (
                <button
                  type="button"
                  onClick={handleSaveToggle}
                  disabled={saveBusy}
                  className={`inline-flex items-center gap-2 rounded-full border px-3 py-2 text-[11px] font-semibold uppercase tracking-[0.14em] transition ${saved ? 'border-violet-300/20 bg-violet-400/10 text-violet-100 hover:bg-violet-400/15' : 'border-white/10 bg-white/[0.04] text-white hover:bg-white/[0.08]'} disabled:opacity-60`}
                >
                  <i className={`fa-solid ${saveBusy ? 'fa-circle-notch fa-spin' : (saved ? 'fa-bookmark' : 'fa-bookmark')} text-[11px]`} />
                  {saved ? 'Saved' : 'Save'}
                </button>
              ) : null}
              <span className="inline-flex items-center gap-1 text-slate-200">
                <i className="fa-solid fa-arrow-right text-[11px]" />
                Open
              </span>
            </div>
          </div>

          {isOwner ? (
            <div className="mt-4 flex flex-wrap gap-2" onClick={stop}>
              {collection?.visibility === 'public' ? (
                <button
                  type="button"
                  onClick={handleToggleFeature}
                  className={`inline-flex items-center gap-2 rounded-xl border px-3 py-2 text-xs font-semibold uppercase tracking-[0.14em] transition ${collection?.is_featured ? 'border-amber-300/25 bg-amber-300/10 text-amber-100 hover:bg-amber-300/15' : 'border-sky-300/20 bg-sky-400/10 text-sky-100 hover:bg-sky-400/15'}`}
                >
                  <i className={`fa-solid ${collection?.is_featured ? 'fa-star' : 'fa-sparkles'} fa-fw`} />
                  {collection?.is_featured ? 'Featured' : 'Feature'}
                </button>
              ) : null}
              <a
                href={collection?.edit_url || collection?.manage_url || '#'}
                className="inline-flex items-center gap-2 rounded-xl border border-white/12 bg-white/[0.05] px-3 py-2 text-xs font-semibold uppercase tracking-[0.14em] text-slate-100 transition hover:bg-white/[0.09]"
              >
                <i className="fa-solid fa-pen-to-square fa-fw" />
                Edit
              </a>
              <a
                href={collection?.manage_url || collection?.edit_url || '#'}
                className="inline-flex items-center gap-2 rounded-xl border border-sky-300/20 bg-sky-400/10 px-3 py-2 text-xs font-semibold uppercase tracking-[0.14em] text-sky-100 transition hover:bg-sky-400/15"
              >
                <i className="fa-solid fa-grip fa-fw" />
                Manage Artworks
              </a>
              {onMoveUp ? (
                <button
                  type="button"
                  disabled={!canMoveUp}
                  onClick={(event) => {
                    event.preventDefault()
                    event.stopPropagation()
                    onMoveUp(collection)
                  }}
                  className={`inline-flex items-center gap-2 rounded-xl border px-3 py-2 text-xs font-semibold uppercase tracking-[0.14em] ${canMoveUp ? 'border-white/12 bg-white/[0.05] text-white hover:bg-white/[0.09]' : 'border-white/8 bg-white/[0.03] text-slate-500'}`}
                >
                  <i className="fa-solid fa-arrow-up fa-fw" />
                  Up
                </button>
              ) : null}
              {onMoveDown ? (
                <button
                  type="button"
                  disabled={!canMoveDown}
                  onClick={(event) => {
                    event.preventDefault()
                    event.stopPropagation()
                    onMoveDown(collection)
                  }}
                  className={`inline-flex items-center gap-2 rounded-xl border px-3 py-2 text-xs font-semibold uppercase tracking-[0.14em] ${canMoveDown ? 'border-white/12 bg-white/[0.05] text-white hover:bg-white/[0.09]' : 'border-white/8 bg-white/[0.03] text-slate-500'}`}
                >
                  <i className="fa-solid fa-arrow-down fa-fw" />
                  Down
                </button>
              ) : null}
              {collection?.delete_url ? (
                <button
                  type="button"
                  onClick={handleDelete}
                  className="inline-flex items-center gap-2 rounded-xl border border-rose-400/20 bg-rose-400/10 px-3 py-2 text-xs font-semibold uppercase tracking-[0.14em] text-rose-100 transition hover:bg-rose-400/15"
                >
                  <i className="fa-solid fa-trash-can fa-fw" />
                  Delete
                </button>
              ) : null}
            </div>
          ) : null}
        </div>
      </div>
    </a>
  )
}