/**
 * InventoryView — MMORPG-style inventory management panel.
 *
 * Replaces the PersonaSettingsPanel content when viewMode="inventory".
 * Two-pane layout:
 *   Left:  category sidebar with counts
 *   Right: search bar + item grid with lazy loading
 *
 * Mental model: A persona has exactly ONE "Active Look" — the image that
 * represents them everywhere.  Inventory is a gallery of stored images;
 * any image can be promoted to Active Look via a single click.  Thumbnails
 * are derived automatically and never shown as selectable items.
 */
import React, { useState, useEffect, useCallback, useRef, useMemo } from 'react';
import { ArrowLeft, Search, Shirt, Image as ImageIcon, FileText, Loader2, Eye, Lock, Package, AlertCircle, Trash2, RotateCcw, } from 'lucide-react';
import { fetchInventoryCategories, searchInventory, deleteInventoryItem, } from '../inventoryApi';
import { PersonaDocumentsPanel } from './PersonaDocumentsPanel';
// ---------------------------------------------------------------------------
// Sensitivity helpers (mirrors backend inventory.py)
// ---------------------------------------------------------------------------
const SENS_ORDER = { safe: 0, sensitive: 1, explicit: 2 };
function classifySensitivity(label) {
    const low = (label || '').trim().toLowerCase();
    const keywords = ['lingerie', 'intimate', 'underwear', 'bra', 'panties', 'sexy', 'bikini'];
    return keywords.some(k => low.includes(k)) ? 'sensitive' : 'safe';
}
function allowedBySensitivity(itemSens, maxSens) {
    return (SENS_ORDER[itemSens] ?? 0) <= (SENS_ORDER[maxSens] ?? 0);
}
// ---------------------------------------------------------------------------
// Build InventoryItem[] from local draft state
// ---------------------------------------------------------------------------
function buildDraftItems(draft, sensitivityMax) {
    const out = [];
    const active = draft.selected;
    // Base portraits from sets → type='image'
    for (const s of draft.sets) {
        for (const img of s.images) {
            if (!img.url)
                continue;
            if (!allowedBySensitivity('safe', sensitivityMax))
                continue;
            out.push({
                id: img.id,
                type: 'image',
                label: 'Portrait',
                tags: ['portrait', 'set'],
                sensitivity: 'safe',
                url: img.url,
                set_id: s.set_id,
                image_id: img.id,
                is_active_look: !!(active && s.set_id === active.set_id && img.id === active.image_id),
            });
        }
    }
    // Outfits → type='outfit' with preview image (mirrors backend search output)
    for (const outfit of draft.outfits) {
        const sens = classifySensitivity(outfit.label);
        if (!allowedBySensitivity(sens, sensitivityMax))
            continue;
        const firstImg = outfit.images[0];
        out.push({
            id: outfit.id,
            type: 'outfit',
            label: outfit.label,
            tags: [outfit.label.toLowerCase()],
            sensitivity: sens,
            description: outfit.outfit_prompt,
            asset_ids: outfit.images.map(img => img.id),
            preview_asset_id: firstImg?.id,
            url: firstImg?.url,
            // set_id/image_id from first image so the outfit card is selectable
            set_id: firstImg ? outfit.id : undefined,
            image_id: firstImg?.id,
            is_active_look: !!(active && firstImg && outfit.id === active.set_id && firstImg.id === active.image_id),
        });
    }
    return out;
}
// ---------------------------------------------------------------------------
// Category icon map
// ---------------------------------------------------------------------------
const CATEGORY_ICONS = {
    outfit: Shirt,
    image: ImageIcon,
    file: FileText,
    all: Package,
};
const CATEGORY_COLORS = {
    outfit: 'text-amber-400',
    image: 'text-pink-400',
    file: 'text-blue-400',
    all: 'text-purple-400',
};
// ---------------------------------------------------------------------------
// Main component
// ---------------------------------------------------------------------------
export function InventoryView({ projectId, backendUrl, apiKey, onBack, onShowInChat, activeSelection, onSetActiveLook, draftAppearance }) {
    // State
    const [categories, setCategories] = useState([]);
    const [items, setItems] = useState([]);
    const [totalCount, setTotalCount] = useState(0);
    const [loading, setLoading] = useState(true);
    const [searchLoading, setSearchLoading] = useState(false);
    const [error, setError] = useState(null);
    const [selectedCategory, setSelectedCategory] = useState('all');
    const [query, setQuery] = useState('');
    const [debouncedQuery, setDebouncedQuery] = useState('');
    const [limit] = useState(30);
    const [refreshKey, setRefreshKey] = useState(0);
    const [deleting, setDeleting] = useState(null);
    const searchTimerRef = useRef();
    // Sensitivity from localStorage (matches PersonaSettingsPanel)
    const isSpicy = (() => {
        try {
            return localStorage.getItem('homepilot_nsfw_mode') === 'true';
        }
        catch {
            return false;
        }
    })();
    const sensitivityMax = isSpicy ? 'explicit' : 'safe';
    // -----------------------------------------------------------------------
    // Draft items from local state (appear before backend save)
    // -----------------------------------------------------------------------
    const draftItems = useMemo(() => {
        if (!draftAppearance)
            return [];
        return buildDraftItems(draftAppearance, sensitivityMax);
    }, [draftAppearance, sensitivityMax]);
    // Merge backend items + draft extras (backend wins on ID conflicts)
    const mergedItems = useMemo(() => {
        const backendIds = new Set(items.map(i => i.id));
        const q = debouncedQuery.toLowerCase();
        const extras = draftItems.filter(d => {
            if (backendIds.has(d.id))
                return false;
            if (selectedCategory !== 'all' && d.type !== selectedCategory)
                return false;
            if (q) {
                const label = (d.label || '').toLowerCase();
                const desc = (d.description || '').toLowerCase();
                const tags = (d.tags || []).join(' ').toLowerCase();
                if (!label.includes(q) && !desc.includes(q) && !tags.includes(q))
                    return false;
            }
            return true;
        });
        return [...items, ...extras];
    }, [items, draftItems, selectedCategory, debouncedQuery]);
    // Merged category counts: backend counts + genuinely new draft items
    // (items with uncommitted URLs that aren't in the backend yet).
    const mergedCategories = useMemo(() => {
        const extrasByType = {};
        const backendIds = new Set(items.map(i => i.id));
        for (const d of draftItems) {
            if (backendIds.has(d.id))
                continue;
            // Items with /files/ URLs are already committed — avoid double-count
            const url = d.url || '';
            if (url.includes('/files/'))
                continue;
            if (!url)
                continue;
            extrasByType[d.type] = (extrasByType[d.type] || 0) + 1;
        }
        if (categories.length > 0) {
            return categories.map(cat => ({
                ...cat,
                count: (cat.count ?? 0) + (extrasByType[cat.type] ?? 0),
            }));
        }
        return [
            { type: 'outfit', label: 'Outfits', count: extrasByType.outfit ?? 0 },
            { type: 'image', label: 'Photos', count: extrasByType.image ?? 0 },
            { type: 'file', label: 'Documents', count: extrasByType.file ?? 0 },
        ];
    }, [categories, items, draftItems]);
    // -----------------------------------------------------------------------
    // Debounced search
    // -----------------------------------------------------------------------
    useEffect(() => {
        if (searchTimerRef.current)
            clearTimeout(searchTimerRef.current);
        searchTimerRef.current = setTimeout(() => setDebouncedQuery(query), 300);
        return () => { if (searchTimerRef.current)
            clearTimeout(searchTimerRef.current); };
    }, [query]);
    // -----------------------------------------------------------------------
    // Load categories on mount
    // -----------------------------------------------------------------------
    useEffect(() => {
        let cancelled = false;
        (async () => {
            try {
                const data = await fetchInventoryCategories(backendUrl, projectId, {
                    apiKey,
                    includeTags: true,
                    sensitivityMax,
                });
                if (!cancelled)
                    setCategories(data.categories || []);
            }
            catch (e) {
                if (!cancelled)
                    setError(e.message);
            }
        })();
        return () => { cancelled = true; };
    }, [backendUrl, projectId, apiKey, sensitivityMax, refreshKey]);
    // -----------------------------------------------------------------------
    // Search when category or query changes
    // -----------------------------------------------------------------------
    useEffect(() => {
        let cancelled = false;
        (async () => {
            setSearchLoading(true);
            try {
                const types = selectedCategory === 'all' ? undefined : [selectedCategory];
                const data = await searchInventory(backendUrl, projectId, {
                    apiKey,
                    query: debouncedQuery || undefined,
                    types,
                    limit,
                    sensitivityMax,
                });
                if (!cancelled) {
                    setItems(data.items || []);
                    setTotalCount(data.total_count || 0);
                    setError(null);
                }
            }
            catch (e) {
                if (!cancelled)
                    setError(e.message);
            }
            finally {
                if (!cancelled) {
                    setSearchLoading(false);
                    setLoading(false);
                }
            }
        })();
        return () => { cancelled = true; };
    }, [backendUrl, projectId, apiKey, selectedCategory, debouncedQuery, limit, sensitivityMax, refreshKey]);
    // -----------------------------------------------------------------------
    // Resolve image URL for display
    // -----------------------------------------------------------------------
    const resolveImageUrl = useCallback((item) => {
        const url = item.url;
        if (!url)
            return undefined;
        const tok = (() => { try {
            return localStorage.getItem('homepilot_auth_token') || '';
        }
        catch {
            return '';
        } })();
        let full = url.startsWith('http') ? url : `${backendUrl}${url}`;
        if (tok && full.includes('/files/')) {
            const sep = full.includes('?') ? '&' : '?';
            full = `${full}${sep}token=${encodeURIComponent(tok)}`;
        }
        return full;
    }, [backendUrl]);
    // -----------------------------------------------------------------------
    // Delete handler
    // -----------------------------------------------------------------------
    const handleDelete = useCallback(async (item) => {
        if (deleting)
            return;
        // Prevent deleting the active look from the UI side
        if (item.is_active_look) {
            setError('Cannot delete the active look. Change the active look first.');
            return;
        }
        if (!confirm(`Delete "${item.label}"? This cannot be undone.`))
            return;
        setDeleting(item.id);
        try {
            await deleteInventoryItem(backendUrl, projectId, item.id, { apiKey });
            setRefreshKey((k) => k + 1);
        }
        catch (e) {
            const msg = e.message || '';
            if (msg.includes('409') || msg.includes('active look')) {
                setError('Cannot delete the active look. Change the active look first.');
            }
            else {
                setError(`Delete failed: ${msg}`);
            }
        }
        finally {
            setDeleting(null);
        }
    }, [backendUrl, projectId, apiKey, deleting]);
    // -----------------------------------------------------------------------
    // Set as Active Look handler (wardrobe-style selection)
    // -----------------------------------------------------------------------
    const handleSetActiveLook = useCallback((item) => {
        if (!item.set_id || !item.image_id)
            return;
        onSetActiveLook?.({ set_id: item.set_id, image_id: item.image_id });
    }, [onSetActiveLook]);
    // -----------------------------------------------------------------------
    // Render: category sidebar
    // -----------------------------------------------------------------------
    const totalItems = mergedCategories.reduce((sum, c) => sum + (c.count || 0), 0);
    const renderSidebar = () => (<div className="w-44 shrink-0 border-r border-white/10 py-3 space-y-0.5">
      {/* All items */}
      <SidebarItem icon={Package} label="All Items" count={totalItems} color="text-purple-400" active={selectedCategory === 'all'} onClick={() => setSelectedCategory('all')}/>
      {/* Per-category */}
      {mergedCategories.map((cat) => (<SidebarItem key={cat.type} icon={CATEGORY_ICONS[cat.type] || Package} label={cat.label} count={cat.count} color={CATEGORY_COLORS[cat.type] || 'text-white/50'} active={selectedCategory === cat.type} onClick={() => setSelectedCategory(cat.type)}/>))}
    </div>);
    // -----------------------------------------------------------------------
    // Render: item card
    // -----------------------------------------------------------------------
    const renderItemCard = (item) => {
        const isImage = item.type === 'image';
        const isOutfit = item.type === 'outfit';
        const isFile = item.type === 'file';
        const isSensitive = item.sensitivity === 'sensitive' || item.sensitivity === 'explicit';
        const imgUrl = (isImage || isOutfit) ? resolveImageUrl(item) : undefined;
        const canSetActive = !!(item.set_id && item.image_id && onSetActiveLook);
        // Wardrobe-style: check if this card matches the current selection
        const isSelected = !!(activeSelection
            && item.set_id === activeSelection.set_id
            && item.image_id === activeSelection.image_id);
        const isDeleting = deleting === item.id;
        return (<div key={item.id} className={[
                'group relative rounded-xl overflow-hidden transition-all',
                isSelected
                    ? 'border-2 border-amber-500/50 ring-2 ring-amber-500/20 shadow-[0_0_12px_rgba(245,158,11,0.15)]'
                    : 'border border-white/[0.06] bg-white/[0.02] hover:border-white/15',
                isDeleting ? 'opacity-40 pointer-events-none' : '',
            ].join(' ')}>
        {/* Equipped badge — Wardrobe style (top-right, always visible when selected or outfit is equipped) */}
        {(isSelected || (isOutfit && item.equipped)) && (<div className="absolute top-1.5 right-1.5 px-1.5 py-0.5 rounded-md bg-amber-500/80 text-[7px] text-white font-bold uppercase tracking-wider z-10">
            Equipped
          </div>)}

        {/* Delete button — top-right on hover (shifts left when Equipped badge is showing) */}
        <div className={[
                'absolute top-1.5 z-10 opacity-0 group-hover:opacity-100 transition-opacity',
                isSelected ? 'left-1.5' : 'right-1.5',
            ].join(' ')}>
          <ActionButton icon={Trash2} label="Delete" onClick={() => handleDelete(item)} variant="danger"/>
        </div>

        {/* Image preview — primary click selects (like Wardrobe) */}
        {(isImage || isOutfit) && (<div className="aspect-[3/4] bg-black/30 relative overflow-hidden cursor-pointer" onClick={() => {
                    if (canSetActive) {
                        handleSetActiveLook(item);
                    }
                }}>
            {isSensitive && !isSpicy ? (<div className="absolute inset-0 flex flex-col items-center justify-center gap-2 bg-black/60">
                <Lock size={20} className="text-white/30"/>
                <span className="text-[10px] text-white/30">Locked</span>
              </div>) : imgUrl ? (<img src={imgUrl} alt={item.label} className="w-full h-full object-cover" loading="lazy" onError={(e) => { e.target.style.display = 'none'; }}/>) : (<div className="absolute inset-0 flex items-center justify-center">
                <ImageIcon size={24} className="text-white/20"/>
              </div>)}

            {/* Hover actions — bottom center (only Show in chat) */}
            <div className="absolute inset-0 bg-black/0 group-hover:bg-black/40 transition-all flex items-end justify-center pb-2 gap-1.5 opacity-0 group-hover:opacity-100">
              {onShowInChat && imgUrl && (<ActionButton icon={Eye} label="Show in chat" onClick={() => onShowInChat(item, imgUrl)}/>)}
            </div>
          </div>)}

        {/* File icon for documents */}
        {isFile && (<div className="aspect-[4/3] bg-black/20 flex items-center justify-center relative">
            <div className="flex flex-col items-center gap-1.5">
              <FileText size={28} className="text-blue-400/60"/>
              <span className="text-[9px] text-white/30 uppercase tracking-wider">
                {(item.mime || '').split('/').pop() || 'file'}
              </span>
            </div>
          </div>)}

        {/* Label + metadata */}
        <div className="px-2.5 py-2">
          <div className="text-xs text-white truncate font-medium">{item.label}</div>
          <div className="flex items-center gap-1 mt-1 flex-wrap">
            <span className={`text-[9px] uppercase tracking-wider ${CATEGORY_COLORS[item.type] || 'text-white/40'}`}>
              {item.type}
            </span>
            {isSensitive && (<span className={`text-[9px] flex items-center gap-0.5 ${item.sensitivity === 'explicit' ? 'text-red-400/60' : 'text-orange-400/60'}`}>
                <Lock size={8}/> {item.sensitivity}
              </span>)}
            {/* 360 preview badge for outfits with view packs */}
            {isOutfit && item.interactive_preview && (<span className="text-[9px] flex items-center gap-0.5 text-violet-300/60">
                <RotateCcw size={8}/> 360
              </span>)}
          </div>
          {/* Tags */}
          {item.tags && item.tags.length > 0 && (<div className="flex flex-wrap gap-1 mt-1.5">
              {item.tags.slice(0, 3).map((tag) => (<span key={tag} className="text-[9px] px-1.5 py-0.5 rounded-full bg-white/5 text-white/30 border border-white/5">
                  {tag}
                </span>))}
            </div>)}
          {/* View angle chips for outfits with view packs */}
          {isOutfit && item.available_views && item.available_views.length > 0 && (<div className="flex flex-wrap gap-1 mt-1.5">
              {item.available_views.map((angle) => (<span key={angle} className="text-[8px] px-1.5 py-0.5 rounded-full bg-violet-500/8 text-violet-300/50 border border-violet-500/15 capitalize">
                  {angle}
                </span>))}
            </div>)}
          {isFile && item.size_bytes != null && item.size_bytes > 0 && (<div className="text-[9px] text-white/25 mt-1">
              {item.size_bytes > 1048576
                    ? `${(item.size_bytes / 1048576).toFixed(1)} MB`
                    : `${Math.round(item.size_bytes / 1024)} KB`}
            </div>)}
        </div>
      </div>);
    };
    // -----------------------------------------------------------------------
    // Render: loadout summary (compact, top of content)
    // -----------------------------------------------------------------------
    const activeLookItem = mergedItems.find((i) => i.is_active_look);
    const outfitCount = mergedCategories.find((c) => c.type === 'outfit')?.count || 0;
    const photoCount = mergedCategories.find((c) => c.type === 'image')?.count || 0;
    const docCount = mergedCategories.find((c) => c.type === 'file')?.count || 0;
    const renderLoadoutSummary = () => (<div className="flex items-center gap-4 px-4 py-2.5 bg-white/[0.03] border-b border-white/5">
      {/* Mini Active Look */}
      {activeLookItem?.url && (<div className="w-8 h-8 rounded-lg overflow-hidden border border-amber-500/30 shrink-0">
          <img src={resolveImageUrl(activeLookItem) || ''} alt="Active Look" className="w-full h-full object-cover"/>
        </div>)}
      <div className="flex items-center gap-3 text-[10px] text-white/40">
        <span className="flex items-center gap-1"><Shirt size={10} className="text-amber-400/60"/> {outfitCount} outfits</span>
        <span className="flex items-center gap-1"><ImageIcon size={10} className="text-pink-400/60"/> {photoCount} photos</span>
        <span className="flex items-center gap-1"><FileText size={10} className="text-blue-400/60"/> {docCount} docs</span>
      </div>
    </div>);
    // -----------------------------------------------------------------------
    // Main render
    // -----------------------------------------------------------------------
    if (loading && items.length === 0) {
        return (<div className="flex-1 flex items-center justify-center py-20">
        <Loader2 size={24} className="animate-spin text-white/30"/>
      </div>);
    }
    return (<div className="flex flex-col flex-1 min-h-0">
      {/* Top bar: back + search */}
      <div className="flex items-center gap-3 px-4 py-3 border-b border-white/10 bg-white/[0.02]">
        <button onClick={onBack} className="flex items-center gap-1.5 text-xs text-white/50 hover:text-white transition-colors shrink-0">
          <ArrowLeft size={14}/>
          <span>Back</span>
        </button>
        <div className="flex-1 relative">
          <Search size={14} className="absolute left-3 top-1/2 -translate-y-1/2 text-white/30"/>
          <input type="text" value={query} onChange={(e) => setQuery(e.target.value)} placeholder="Search inventory..." className="w-full pl-9 pr-3 py-1.5 text-xs bg-white/5 border border-white/10 rounded-lg text-white placeholder:text-white/25 focus:outline-none focus:border-white/20 transition-colors"/>
        </div>
        <div className="text-[10px] text-white/30 shrink-0">
          {searchLoading ? (<Loader2 size={12} className="animate-spin"/>) : (`${mergedItems.length} items`)}
        </div>
      </div>

      {/* Loadout summary */}
      {renderLoadoutSummary()}

      {/* Two-pane body */}
      <div className="flex flex-1 min-h-0">
        {/* Sidebar */}
        {renderSidebar()}

        {/* Item grid */}
        <div className="flex-1 overflow-y-auto custom-scrollbar p-3">
          {error && (<div className="flex items-center gap-2 px-3 py-2 mb-3 rounded-lg bg-red-500/10 border border-red-500/20 text-xs text-red-400">
              <AlertCircle size={14}/>
              {error}
            </div>)}

          {/* Knowledge Base panel (shown when Documents category is selected) */}
          {selectedCategory === 'file' && (<div className="mb-4 p-3 rounded-xl bg-white/[0.02] border border-white/5">
              <PersonaDocumentsPanel projectId={projectId} backendUrl={backendUrl} apiKey={apiKey} onChanged={() => setRefreshKey((k) => k + 1)}/>
            </div>)}

          {mergedItems.length === 0 && !searchLoading && selectedCategory !== 'file' && (<div className="flex flex-col items-center justify-center py-16 gap-2 text-white/30">
              <Package size={32} className="text-white/15"/>
              <p className="text-xs">
                {debouncedQuery
                ? 'No items match your search.'
                : totalItems > 0 && mergedItems.length === 0
                    ? 'No items returned. Check sensitivity filters or try refreshing.'
                    : 'Inventory is empty.'}
              </p>
            </div>)}

          {/* Hide inventory grid when Documents tab is active — the Knowledge Base panel above is the single source of truth */}
          {selectedCategory !== 'file' && (<div className="grid grid-cols-2 sm:grid-cols-3 gap-2.5">
              {mergedItems.map(renderItemCard)}
            </div>)}

          {selectedCategory !== 'file' && items.length < totalCount && !searchLoading && (<div className="text-center py-4">
              <span className="text-[10px] text-white/25">
                Showing {mergedItems.length} of {totalCount + (mergedItems.length - items.length)} items
              </span>
            </div>)}
        </div>
      </div>
    </div>);
}
// ---------------------------------------------------------------------------
// Sidebar item
// ---------------------------------------------------------------------------
function SidebarItem({ icon: Icon, label, count, color, active, onClick, }) {
    return (<button onClick={onClick} className={[
            'w-full flex items-center gap-2.5 px-3 py-2 text-xs transition-colors',
            active
                ? 'bg-white/10 text-white border-r-2 border-pink-500'
                : 'text-white/50 hover:text-white/70 hover:bg-white/5',
        ].join(' ')}>
      <Icon size={14} className={active ? color : 'text-white/30'}/>
      <span className="flex-1 text-left truncate">{label}</span>
      {count != null && (<span className="text-[10px] text-white/30 tabular-nums">{count}</span>)}
    </button>);
}
// ---------------------------------------------------------------------------
// Action button (hover overlay)
// ---------------------------------------------------------------------------
function ActionButton({ icon: Icon, label, onClick, variant, }) {
    const isDanger = variant === 'danger';
    return (<button onClick={(e) => { e.stopPropagation(); onClick(); }} title={label} className={[
            'p-1.5 rounded-lg transition-all border',
            isDanger
                ? 'bg-red-900/60 text-red-300/70 hover:text-red-200 hover:bg-red-800/80 border-red-500/20'
                : 'bg-black/60 text-white/70 hover:text-white hover:bg-black/80 border-white/10',
        ].join(' ')}>
      <Icon size={12}/>
    </button>);
}