import { useState, useMemo } from 'react';
import {
    Dialog, DialogContent, DialogHeader, DialogTitle,
} from '@/Components/ui/dialog';
import { Input } from '@/Components/ui/input';
import {
    Table, TableBody, TableCell, TableHead, TableHeader, TableRow,
} from '@/Components/ui/table';
import { Badge } from '@/Components/ui/badge';
import { Package, Search } from 'lucide-react';

interface MaterialOption {
    id: number;
    ulid: string;
    name: string;
    sku?: string;
    unit: string;
    unit_cost: string;
    category?: string;
}

interface MaterialBrowserModalProps {
    open: boolean;
    onOpenChange: (open: boolean) => void;
    title?: string;
    materials: MaterialOption[];
}

const formatCurrency = (v: string) =>
    new Intl.NumberFormat('en-PH', { style: 'currency', currency: 'PHP' }).format(Number(v));

type SortKey = 'name' | 'sku' | 'category' | 'unit' | 'unit_cost';
type SortDir = 'asc' | 'desc';

export default function MaterialBrowserModal({
    open,
    onOpenChange,
    title = 'Materials',
    materials,
}: MaterialBrowserModalProps) {
    const [search, setSearch] = useState('');
    const [sortKey, setSortKey] = useState<SortKey>('name');
    const [sortDir, setSortDir] = useState<SortDir>('asc');

    const handleSort = (key: SortKey) => {
        if (sortKey === key) {
            setSortDir(sortDir === 'asc' ? 'desc' : 'asc');
        } else {
            setSortKey(key);
            setSortDir('asc');
        }
    };

    const sortIndicator = (key: SortKey) => {
        if (sortKey !== key) return null;
        return <span className="ml-1 text-xs">{sortDir === 'asc' ? '↑' : '↓'}</span>;
    };

    const filtered = useMemo(() => {
        const q = search.toLowerCase().trim();
        let list = materials;

        if (q) {
            list = list.filter(
                (m) =>
                    m.name.toLowerCase().includes(q) ||
                    (m.sku && m.sku.toLowerCase().includes(q)) ||
                    (m.category && m.category.toLowerCase().includes(q))
            );
        }

        return [...list].sort((a, b) => {
            const aVal = (a[sortKey] ?? '').toString().toLowerCase();
            const bVal = (b[sortKey] ?? '').toString().toLowerCase();

            if (sortKey === 'unit_cost') {
                const diff = Number(a.unit_cost) - Number(b.unit_cost);
                return sortDir === 'asc' ? diff : -diff;
            }

            const cmp = aVal.localeCompare(bVal);
            return sortDir === 'asc' ? cmp : -cmp;
        });
    }, [materials, search, sortKey, sortDir]);

    return (
        <Dialog open={open} onOpenChange={onOpenChange}>
            <DialogContent className="sm:max-w-2xl max-h-[80vh] flex flex-col">
                <DialogHeader>
                    <DialogTitle className="flex items-center gap-2">
                        <Package className="h-5 w-5 text-gray-500" />
                        {title}
                        <Badge variant="outline" className="ml-1">{materials.length}</Badge>
                    </DialogTitle>
                </DialogHeader>

                <div className="relative">
                    <Search className="absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-gray-400" />
                    <Input
                        placeholder="Search by name, SKU, or category..."
                        value={search}
                        onChange={(e) => setSearch(e.target.value)}
                        className="pl-10"
                    />
                </div>

                <div className="overflow-y-auto flex-1 -mx-4 px-4">
                    {filtered.length === 0 ? (
                        <div className="text-center py-10">
                            <Package className="mx-auto h-10 w-10 text-gray-300 mb-3" />
                            <p className="text-gray-500">
                                {search ? 'No materials match your search.' : 'No materials in this group.'}
                            </p>
                        </div>
                    ) : (
                        <Table>
                            <TableHeader>
                                <TableRow>
                                    <TableHead
                                        className="cursor-pointer select-none"
                                        onClick={() => handleSort('name')}
                                    >
                                        Material {sortIndicator('name')}
                                    </TableHead>
                                    <TableHead
                                        className="cursor-pointer select-none"
                                        onClick={() => handleSort('sku')}
                                    >
                                        SKU {sortIndicator('sku')}
                                    </TableHead>
                                    <TableHead
                                        className="cursor-pointer select-none"
                                        onClick={() => handleSort('category')}
                                    >
                                        Category {sortIndicator('category')}
                                    </TableHead>
                                    <TableHead
                                        className="cursor-pointer select-none"
                                        onClick={() => handleSort('unit')}
                                    >
                                        Unit {sortIndicator('unit')}
                                    </TableHead>
                                    <TableHead
                                        className="cursor-pointer select-none text-right"
                                        onClick={() => handleSort('unit_cost')}
                                    >
                                        Unit Cost {sortIndicator('unit_cost')}
                                    </TableHead>
                                </TableRow>
                            </TableHeader>
                            <TableBody>
                                {filtered.map((m) => (
                                    <TableRow key={m.id}>
                                        <TableCell className="font-medium text-sm">{m.name}</TableCell>
                                        <TableCell className="text-sm text-gray-500">{m.sku || '-'}</TableCell>
                                        <TableCell className="text-sm">
                                            <Badge variant="outline">{m.category || '-'}</Badge>
                                        </TableCell>
                                        <TableCell className="text-sm">{m.unit}</TableCell>
                                        <TableCell className="text-right text-sm tabular-nums">
                                            {formatCurrency(m.unit_cost)}
                                        </TableCell>
                                    </TableRow>
                                ))}
                            </TableBody>
                        </Table>
                    )}
                </div>

                {filtered.length > 0 && filtered.length !== materials.length && (
                    <p className="text-xs text-gray-400 text-center pt-2">
                        Showing {filtered.length} of {materials.length} materials
                    </p>
                )}
            </DialogContent>
        </Dialog>
    );
}