import React from 'react'
import { usePage } from '@inertiajs/react'
import StudioLayout from '../../Layouts/StudioLayout'
import StudioToolbar from '../../Components/Studio/StudioToolbar'
import StudioGridCard from '../../Components/Studio/StudioGridCard'
import StudioTable from '../../Components/Studio/StudioTable'
import BulkActionsBar from '../../Components/Studio/BulkActionsBar'
import BulkTagModal from '../../Components/Studio/BulkTagModal'
import BulkCategoryModal from '../../Components/Studio/BulkCategoryModal'
import ConfirmDangerModal from '../../Components/Studio/ConfirmDangerModal'

function getCsrfToken() {
  return document.querySelector('meta[name="csrf-token"]')?.getAttribute('content') || ''
}

export default function StudioDrafts() {
  const { props } = usePage()
  const { categories } = props

  const [viewMode, setViewMode] = React.useState(() => localStorage.getItem('studio_view_mode') || 'grid')
  const [artworks, setArtworks] = React.useState([])
  const [meta, setMeta] = React.useState({ current_page: 1, last_page: 1, per_page: 24, total: 0 })
  const [loading, setLoading] = React.useState(true)
  const [search, setSearch] = React.useState('')
  const [sort, setSort] = React.useState('created_at:desc')
  const [selectedIds, setSelectedIds] = React.useState([])
  const [deleteModal, setDeleteModal] = React.useState({ open: false, ids: [] })
  const [tagModal, setTagModal] = React.useState({ open: false, mode: 'add' })
  const [categoryModal, setCategoryModal] = React.useState({ open: false })
  const searchTimer = React.useRef(null)
  const perPage = viewMode === 'list' ? 50 : 24

  function getCsrfToken() {
    return document.querySelector('meta[name="csrf-token"]')?.getAttribute('content') || ''
  }

  const fetchArtworks = React.useCallback(async (page = 1) => {
    setLoading(true)
    try {
      const params = new URLSearchParams()
      params.set('page', page)
      params.set('per_page', perPage)
      params.set('sort', sort)
      params.set('status', 'draft')
      if (search) params.set('q', search)
      const res = await fetch(`/api/studio/artworks?${params.toString()}`, {
        headers: { 'Accept': 'application/json', 'X-CSRF-TOKEN': getCsrfToken() },
        credentials: 'same-origin',
      })
      const data = await res.json()
      setArtworks(data.data || [])
      setMeta(data.meta || meta)
    } catch (err) {
      console.error('Failed to fetch:', err)
    } finally {
      setLoading(false)
    }
  }, [search, sort, perPage])

  React.useEffect(() => {
    clearTimeout(searchTimer.current)
    searchTimer.current = setTimeout(() => fetchArtworks(1), 300)
    return () => clearTimeout(searchTimer.current)
  }, [fetchArtworks])

  const handleViewModeChange = (mode) => {
    setViewMode(mode)
    localStorage.setItem('studio_view_mode', mode)
  }

  const toggleSelect = (id) => setSelectedIds((p) => p.includes(id) ? p.filter((i) => i !== id) : [...p, id])
  const selectAll = () => {
    const ids = artworks.map((a) => a.id)
    setSelectedIds(ids.every((id) => selectedIds.includes(id)) ? [] : ids)
  }

  const handleAction = async (action, artwork) => {
    if (action === 'edit') { window.location.href = `/studio/artworks/${artwork.id}/edit`; return }
    if (action === 'delete') { setDeleteModal({ open: true, ids: [artwork.id] }); return }
    try {
      await fetch(`/api/studio/artworks/${artwork.id}/toggle`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json', 'Accept': 'application/json', 'X-CSRF-TOKEN': getCsrfToken() },
        credentials: 'same-origin',
        body: JSON.stringify({ action }),
      })
      fetchArtworks(meta.current_page)
    } catch (err) { console.error(err) }
  }

  const executeBulk = async (action) => {
    if (action === 'delete') { setDeleteModal({ open: true, ids: [...selectedIds] }); return }
    if (action === 'add_tags') { setTagModal({ open: true, mode: 'add' }); return }
    if (action === 'remove_tags') { setTagModal({ open: true, mode: 'remove' }); return }
    if (action === 'change_category') { setCategoryModal({ open: true }); return }
    try {
      await fetch('/api/studio/artworks/bulk', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json', 'Accept': 'application/json', 'X-CSRF-TOKEN': getCsrfToken() },
        credentials: 'same-origin',
        body: JSON.stringify({ action, artwork_ids: selectedIds, params: {} }),
      })
      setSelectedIds([])
      fetchArtworks(meta.current_page)
    } catch (err) { console.error(err) }
  }

  const confirmBulkTags = async (tagIds) => {
    const action = tagModal.mode === 'add' ? 'add_tags' : 'remove_tags'
    setTagModal({ open: false, mode: 'add' })
    try {
      await fetch('/api/studio/artworks/bulk', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json', 'Accept': 'application/json', 'X-CSRF-TOKEN': getCsrfToken() },
        credentials: 'same-origin',
        body: JSON.stringify({ action, artwork_ids: selectedIds, params: { tag_ids: tagIds } }),
      })
      setSelectedIds([])
      fetchArtworks(meta.current_page)
    } catch (err) { console.error(err) }
  }

  const confirmBulkCategory = async (categoryId) => {
    setCategoryModal({ open: false })
    try {
      await fetch('/api/studio/artworks/bulk', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json', 'Accept': 'application/json', 'X-CSRF-TOKEN': getCsrfToken() },
        credentials: 'same-origin',
        body: JSON.stringify({ action: 'change_category', artwork_ids: selectedIds, params: { category_id: categoryId } }),
      })
      setSelectedIds([])
      fetchArtworks(meta.current_page)
    } catch (err) { console.error(err) }
  }

  const confirmDelete = async () => {
    try {
      await fetch('/api/studio/artworks/bulk', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json', 'Accept': 'application/json', 'X-CSRF-TOKEN': getCsrfToken() },
        credentials: 'same-origin',
        body: JSON.stringify({ action: 'delete', artwork_ids: deleteModal.ids, confirm: 'DELETE' }),
      })
      setDeleteModal({ open: false, ids: [] })
      setSelectedIds((p) => p.filter((id) => !deleteModal.ids.includes(id)))
      fetchArtworks(meta.current_page)
    } catch (err) { console.error(err) }
  }

  return (
    <StudioLayout title="Drafts">
      <StudioToolbar
        search={search}
        onSearchChange={setSearch}
        sort={sort}
        onSortChange={setSort}
        viewMode={viewMode}
        onViewModeChange={handleViewModeChange}
        onFilterToggle={() => {}}
        selectedCount={selectedIds.length}
      />

      {loading && (
        <div className="flex items-center justify-center py-12">
          <div className="w-8 h-8 border-2 border-accent/30 border-t-accent rounded-full animate-spin" />
        </div>
      )}

      {!loading && viewMode === 'grid' && (
        <div className="grid grid-cols-2 sm:grid-cols-3 lg:grid-cols-4 xl:grid-cols-5 gap-4">
          {artworks.map((art) => (
            <StudioGridCard key={art.id} artwork={art} selected={selectedIds.includes(art.id)} onSelect={toggleSelect} onAction={handleAction} />
          ))}
        </div>
      )}

      {!loading && viewMode === 'list' && (
        <StudioTable artworks={artworks} selectedIds={selectedIds} onSelect={toggleSelect} onSelectAll={selectAll} onAction={handleAction} onSort={setSort} currentSort={sort} />
      )}

      {!loading && artworks.length === 0 && (
        <div className="text-center py-16">
          <i className="fa-solid fa-file-pen text-4xl text-slate-600 mb-4" />
          <p className="text-slate-500 text-sm">No draft artworks</p>
        </div>
      )}

      {meta.last_page > 1 && (
        <div className="flex items-center justify-center gap-2 mt-6">
          {Array.from({ length: meta.last_page }, (_, i) => i + 1)
            .filter((p) => p === 1 || p === meta.last_page || Math.abs(p - meta.current_page) <= 2)
            .map((page, idx, arr) => (
              <React.Fragment key={page}>
                {idx > 0 && arr[idx - 1] !== page - 1 && <span className="text-slate-600 text-sm">…</span>}
                <button onClick={() => fetchArtworks(page)} className={`w-9 h-9 rounded-xl text-sm font-medium transition-all ${page === meta.current_page ? 'bg-accent text-white' : 'text-slate-400 hover:text-white hover:bg-white/5'}`}>{page}</button>
              </React.Fragment>
            ))}
        </div>
      )}

      <BulkActionsBar count={selectedIds.length} onExecute={executeBulk} onClearSelection={() => setSelectedIds([])} />
      <ConfirmDangerModal open={deleteModal.open} onClose={() => setDeleteModal({ open: false, ids: [] })} onConfirm={confirmDelete} title="Permanently delete?" message={`Delete ${deleteModal.ids.length} artwork(s) permanently?`} />
      <BulkTagModal open={tagModal.open} mode={tagModal.mode} onClose={() => setTagModal({ open: false, mode: 'add' })} onConfirm={confirmBulkTags} />
      <BulkCategoryModal open={categoryModal.open} categories={categories} onClose={() => setCategoryModal({ open: false })} onConfirm={confirmBulkCategory} />
    </StudioLayout>
  )
}