import { Head, Link, useForm } from '@inertiajs/react';
import { format } from 'date-fns';
import { Plus, Trash2, CalendarIcon, Minus, ShoppingCart, Search, ImagePlus, X, Loader, Save, ArrowLeft } from 'lucide-react';
import React, { useMemo, useState } from 'react';
import { toast } from 'sonner';
import { Badge } from '@/components/ui/badge';
import { Button } from '@/components/ui/button';
import { Calendar } from '@/components/ui/calendar';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import {
    Dialog,
    DialogContent,
    DialogHeader,
    DialogTitle,
    DialogFooter,
} from "@/components/ui/dialog";
import { Empty, EmptyDescription, EmptyHeader, EmptyTitle } from '@/components/ui/empty';
import { Field, FieldError } from "@/components/ui/field";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover';
import { ScrollArea } from '@/components/ui/scroll-area';
import {
    Select,
    SelectContent,
    SelectItem,
    SelectTrigger,
    SelectValue,
} from "@/components/ui/select";
import {
    Sheet,
    SheetContent,
    SheetTrigger,
    SheetClose,
} from "@/components/ui/sheet";
import { cn } from '@/lib/utils';
import purchaseRoutes from '@/routes/purchase';
import type { Product, ProductPrice, Purchase } from '@/types';

type CartItem = { product_id: number; quantity: number; unit_price: number; product: Product };

function getPurchasePrice(prices: ProductPrice[] | undefined): number {
    return prices?.find(p => p.price_type === 'purchase')?.price ?? 0;
}

function getPurchasePriceLabel(prices: ProductPrice[] | undefined): string {
    return prices?.find(p => p.price_type === 'purchase')?.price_formatted ?? 'Rp 0';
}

export default function PurchaseEdit({ purchase, products }: { purchase: Purchase, products: Product[] }) {
    const [isCalendarOpen, setIsCalendarOpen] = useState(false);
    const [search, setSearch] = useState('');
    const [selectedCategory, setSelectedCategory] = useState<string>('all');
    const [qtyDialogIndex, setQtyDialogIndex] = useState<number | null>(null);
    const [qtyInputValue, setQtyInputValue] = useState('');

    const categories = useMemo(() => {
        const map = new Map<number, string>();
        products.forEach(p => p.categories?.forEach(c => map.set(c.id, c.name)));

        return Array.from(map.entries()).map(([id, name]) => ({ id, name }));
    }, [products]);

    const { data, setData, patch, processing, errors } = useForm({
        purchase_date: purchase.purchase_date || format(new Date(), 'yyyy-MM-dd'),
        note: purchase.note || '',
        items: (purchase.items?.map(item => ({
            product_id: item.product_id,
            quantity: item.quantity,
            unit_price: item.unit_price,
            product: products.find(p => p.id === item.product_id) ?? item.product,
        })) ?? []) as CartItem[],
    });

    const filteredProducts = products.filter(p => {
        const matchesSearch = p.name.toLowerCase().includes(search.toLowerCase());
        const matchesCategory = selectedCategory === 'all' || p.categories?.some(c => String(c.id) === selectedCategory);

        return matchesSearch && matchesCategory;
    });

    const getCartItem = (productId: number) =>
        data.items.find(item => item.product_id === productId);

    const addToCart = (product: Product) => {
        const existingIndex = data.items.findIndex(i => i.product_id === product.id);
        const unitPrice = getPurchasePrice(product.prices);

        if (existingIndex > -1) {
            const newItems = [...data.items];
            newItems[existingIndex].quantity += 1;
            setData('items', newItems);
        } else {
            setData('items', [
                ...data.items,
                { product_id: product.id, quantity: 1, unit_price: unitPrice, product }
            ]);
        }
    };

    const decreaseQuantity = (product: Product, e: React.MouseEvent) => {
        e.stopPropagation();
        const existingIndex = data.items.findIndex(i => i.product_id === product.id);

        if (existingIndex === -1) {
return;
}

        const newItems = [...data.items];

        if (newItems[existingIndex].quantity <= 1) {
            newItems.splice(existingIndex, 1);
        } else {
            newItems[existingIndex].quantity -= 1;
        }

        setData('items', newItems);
    };

    const increaseQuantity = (product: Product, e: React.MouseEvent) => {
        e.stopPropagation();
        addToCart(product);
    };

    const removeFromCart = (productId: number) => {
        const newItems = data.items.filter(item => item.product_id !== productId);
        setData('items', newItems);
    };

    const updateCartQuantity = (productId: number, quantity: number) => {
        if (quantity < 1) {
return;
}

        const newItems = [...data.items];
        const index = newItems.findIndex(i => i.product_id === productId);

        if (index > -1) {
            newItems[index].quantity = quantity;
            setData('items', newItems);
        }
    };


    const openQtyDialog = (item: CartItem, e: React.MouseEvent) => {
        e.stopPropagation();
        setQtyInputValue(String(item.quantity));
        setQtyDialogIndex(item.product_id);
    };

    const confirmQty = () => {
        const val = parseInt(qtyInputValue);

        if (!isNaN(val) && val >= 1 && qtyDialogIndex !== null) {
            updateCartQuantity(qtyDialogIndex, val);
        }

        setQtyDialogIndex(null);
    };

    const onSubmit = (e: React.FormEvent) => {
        e.preventDefault();

        if (data.items.length === 0) {
            toast.error('Pilih minimal satu produk');

            return;
        }

        patch(purchaseRoutes.update(purchase.id).url, {
            onSuccess: (response: any) => {
                toast.success(response.props.flash.success);
            },
        });
    };

    const total = useMemo(() => {
        return data.items.reduce((acc, item) => acc + (item.quantity * item.unit_price), 0);
    }, [data.items]);

    const cartTotalItems = data.items.reduce((a, i) => a + i.quantity, 0);

    const CartFormContent = () => (
        <div className="flex flex-col h-full">
            <CardHeader className="border-b py-4 flex-row items-center justify-between shrink-0">
                <CardTitle className="flex items-center gap-2 text-base">
                    <ShoppingCart className="h-4 w-4" />
                    Keranjang
                </CardTitle>
                <Badge className="rounded-full font-bold">
                    {cartTotalItems} pcs
                </Badge>
            </CardHeader>

            <ScrollArea className="flex-1 min-h-0">
                <CardContent className="p-0">
                    {data.items.length === 0 ? (
                        <div className="py-16 text-center text-muted-foreground">
                            <ShoppingCart className="h-10 w-10 mx-auto mb-3 opacity-20" />
                            <p className="text-sm">Keranjang masih kosong</p>
                            <p className="text-xs mt-1 opacity-60">Klik produk untuk menambahkan</p>
                        </div>
                    ) : (
                        <div className="divide-y divide-border">
                            {data.items.map((item) => (
                                <div key={item.product_id} className="p-4 space-y-2.5">
                                    {/* Product info row */}
                                    <div className="flex gap-3">
                                        <div className="h-11 w-11 rounded-md bg-muted overflow-hidden shrink-0 border">
                                            {item.product?.thumbnail_url ? (
                                                <img src={item.product.thumbnail_url} className="h-full w-full object-cover" alt={item.product.name} />
                                            ) : (
                                                <div className="h-full w-full flex items-center justify-center">
                                                    <ImagePlus className="h-4 w-4 text-muted-foreground/50" />
                                                </div>
                                            )}
                                        </div>
                                        <div className="flex-1 min-w-0">
                                            <h4 className="text-sm font-semibold leading-tight line-clamp-1">{item.product?.name}</h4>
                                            <p className="text-xs text-primary font-medium mt-0.5">
                                                Rp {(item.quantity * item.unit_price).toLocaleString('id-ID')}
                                            </p>
                                        </div>
                                        <Button
                                            type="button"
                                            variant="ghost"
                                            size="icon"
                                            className="h-7 w-7 shrink-0 text-muted-foreground hover:text-red-500 hover:bg-red-50 dark:hover:bg-red-950/20"
                                            onClick={() => removeFromCart(item.product_id)}
                                        >
                                            <Trash2 className="h-3.5 w-3.5" />
                                        </Button>
                                    </div>
                                    {/* Qty + price text */}
                                    <div className="flex items-center gap-2 text-xs text-muted-foreground">
                                        <div className="px-2 py-0.5 rounded bg-muted/50 border font-medium text-foreground">
                                            {item.quantity} pcs
                                        </div>
                                        <span>×</span>
                                        <span className="font-mono">
                                            Rp {item.unit_price.toLocaleString('id-ID')}
                                        </span>
                                    </div>
                                </div>
                            ))}
                        </div>
                    )}
                </CardContent>
            </ScrollArea>

            {/* Footer */}
            <div className="p-4 border-t bg-muted/10 space-y-3 shrink-0">
                <Field>
                    <Label htmlFor='purchase_date' className="text-xs text-muted-foreground" required>Tanggal</Label>
                    <Popover open={isCalendarOpen} onOpenChange={setIsCalendarOpen}>
                        <PopoverTrigger asChild>
                            <Button
                                id='purchase_date'
                                variant="outline"
                                size="sm"
                                className={cn("w-full justify-start text-left font-normal h-8 text-xs")}
                            >
                                <CalendarIcon className="mr-1 h-3 w-3" />
                                {data.purchase_date ? (
                                    new Intl.DateTimeFormat("id-ID", {
                                        day: "numeric",
                                        month: "long",
                                        year: "numeric",
                                    }).format(new Date(data.purchase_date))
                                ) : (
                                    <span className="text-muted-foreground">Pilih Tanggal</span>
                                )}
                            </Button>
                        </PopoverTrigger>
                        <PopoverContent className="w-auto overflow-hidden p-0" align="start">
                            <Calendar
                                mode="single"
                                selected={data.purchase_date ? new Date(data.purchase_date) : undefined}
                                defaultMonth={data.purchase_date ? new Date(data.purchase_date) : new Date()}
                                captionLayout="dropdown"
                                onSelect={(selectedDate: Date | undefined) => {
                                    if (selectedDate) {
                                        setData('purchase_date', format(selectedDate, 'yyyy-MM-dd'));
                                    } else {
                                        setData('purchase_date', '');
                                    }

                                    setIsCalendarOpen(false);
                                }}
                            />
                        </PopoverContent>
                    </Popover>
                    <FieldError error={errors.purchase_date} label="Tanggal" className="text-xs" />
                </Field>

                <Field>
                    <Label htmlFor='note' className="text-xs text-muted-foreground">Catatan</Label>
                    <Input id='note' className="h-8 text-xs" value={data.note} onChange={e => setData('note', e.target.value)} placeholder="...." />
                    <FieldError error={errors.note} label="Catatan" className="text-xs" />
                </Field>

                <div className="rounded-xl bg-primary/10 border border-primary/20 p-3 flex items-center justify-between">
                    <div>
                        <p className="text-xs text-muted-foreground">Total Belanja</p>
                        <p className="text-xl font-bold text-primary">Rp {total.toLocaleString('id-ID')}</p>
                    </div>
                    <div className="text-right text-xs text-muted-foreground">
                        <p>{data.items.length} produk</p>
                        <p>{cartTotalItems} pcs</p>
                    </div>
                </div>

                <Button
                    type="submit"
                    className="w-full h-10 font-semibold shadow"
                    disabled={processing || data.items.length === 0}
                    onClick={() => {
                        if (data.items.length > 0) {
                            onSubmit({ preventDefault: () => { } } as any)
                        }
                    }}
                >
                    {processing ? <Loader className="h-4 w-4 animate-spin" /> : <Save className="h-4 w-4" />}
                    {processing ? 'Menyimpan...' : 'Simpan'}
                </Button>
            </div>
        </div>
    );

    return (
        <div className="flex flex-col gap-6 p-6 lg:h-[calc(100vh-64px)] lg:overflow-hidden">
            <Head title="Ubah Belanja" />

            <div className="flex items-center justify-between shrink-0">
                <h1 className="text-3xl font-bold tracking-tight">Ubah Belanja</h1>
                <Link href={purchaseRoutes.index().url}>
                    <Button variant='outline'>
                        <ArrowLeft className="size-4" />
                        Kembali</Button>
                </Link>
            </div>

            <div className="flex-1 min-h-0 grid grid-cols-1 lg:grid-cols-12 gap-6 pb-20 lg:pb-0">
                {/* ── Product Grid (Scrollable) ── */}
                <div className="lg:col-span-8 flex flex-col gap-5 h-full min-h-0">
                    {/* Search + Category Filter */}
                    <div className="flex flex-col sm:flex-row gap-2 shrink-0">
                        <div className="relative flex-1">
                            <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground pointer-events-none" />
                            <Input
                                placeholder="Cari produk..."
                                className="pl-10"
                                value={search}
                                onChange={e => setSearch(e.target.value)}
                            />
                        </div>
                        <Select value={selectedCategory} onValueChange={setSelectedCategory}>
                            <SelectTrigger className="w-full sm:w-40 shrink-0">
                                <SelectValue placeholder="Semua Kategori" />
                            </SelectTrigger>
                            <SelectContent position='item-aligned'>
                                <SelectItem value="all">Semua</SelectItem>
                                {categories.map(cat => (
                                    <SelectItem key={cat.id} value={String(cat.id)}>{cat.name}</SelectItem>
                                ))}
                            </SelectContent>
                        </Select>
                    </div>

                    {/* Scrollable Area for Product Cards */}
                    <ScrollArea className="flex-1 h-full pr-4">
                        <div className="grid grid-cols-2 sm:grid-cols-3 xl:grid-cols-4 gap-4 pb-10">
                            {filteredProducts.map((product) => {
                                const cartItem = getCartItem(product.id);
                                const displayPrice = getPurchasePriceLabel(product.prices);

                                return (
                                    <Card
                                        key={product.id}
                                        className={cn(
                                            "group cursor-pointer transition-all duration-200 bg-card border p-0",
                                            "hover:shadow-lg",
                                            cartItem
                                                ? "border-primary shadow-md"
                                                : "shadow-sm hover:border-primary/50"
                                        )}
                                        onClick={() => addToCart(product)}
                                    >
                                        <CardContent className="p-4 flex flex-col gap-3">
                                            {/* Full Image */}
                                            <div className="-mx-4 -mt-4 aspect-[4/3] overflow-hidden bg-muted/50 rounded-t-xl">
                                                {product.thumbnail_url ? (
                                                    <img
                                                        src={product.thumbnail_url}
                                                        alt={product.name}
                                                        className="h-full w-full object-cover transition-transform duration-300 group-hover:scale-105"
                                                    />
                                                ) : (
                                                    <div className="h-full w-full flex items-center justify-center">
                                                        <ImagePlus className="h-10 w-10 text-muted-foreground/30" />
                                                    </div>
                                                )}
                                            </div>

                                            {/* Categories + Name */}
                                            <div>
                                                <div className="flex flex-wrap gap-1 mb-1.5">
                                                    {product.categories?.map(cat => (
                                                        <Badge key={cat.id} variant="outline" className="text-[10px] h-4 px-1.5">
                                                            {cat.name}
                                                        </Badge>
                                                    ))}
                                                </div>
                                                <h3 className="font-semibold text-sm leading-snug line-clamp-2">
                                                    {product.name}
                                                </h3>
                                            </div>

                                            {/* Price + Stepper */}
                                            <div
                                                className="flex flex-col sm:flex-row sm:items-center justify-between gap-3 mt-auto"
                                                onClick={e => e.stopPropagation()}
                                            >
                                                <div className="flex-1 min-w-0">
                                                    <span className="text-sm font-bold text-foreground tabular-nums truncate block">
                                                        {displayPrice}
                                                    </span>
                                                </div>
                                                <div className="flex items-center gap-1 bg-muted/50 rounded-xl sm:rounded-full p-1 sm:p-0.5 shrink-0 w-full sm:w-auto justify-between sm:justify-end border border-transparent hover:border-primary/20 transition-colors">
                                                    <button
                                                        type="button"
                                                        className={cn(
                                                            "h-8 w-8 sm:h-6 sm:w-6 rounded-lg sm:rounded-full flex items-center justify-center transition-all",
                                                            cartItem
                                                                ? "bg-background text-primary shadow-sm hover:bg-primary hover:text-primary-foreground"
                                                                : "text-muted-foreground/30 cursor-not-allowed"
                                                        )}
                                                        disabled={!cartItem}
                                                        onClick={(e) => decreaseQuantity(product, e)}
                                                    >
                                                        <Minus className="h-3.5 w-3.5 sm:h-3 sm:w-3" />
                                                    </button>
                                                    <button
                                                        type="button"
                                                        className={cn(
                                                            "flex-1 sm:flex-none sm:min-w-[36px] px-1 text-center text-sm font-bold tabular-nums transition-colors",
                                                            cartItem ? "text-foreground hover:text-primary cursor-pointer" : "text-muted-foreground/40 cursor-default"
                                                        )}
                                                        onClick={(e) => {
                                                            if (!cartItem) {
return;
}

                                                            openQtyDialog(cartItem, e);
                                                        }}
                                                    >
                                                        {cartItem?.quantity ?? 0}
                                                    </button>
                                                    <button
                                                        type="button"
                                                        className="h-8 w-8 sm:h-6 sm:w-6 rounded-lg sm:rounded-full bg-primary text-primary-foreground flex items-center justify-center hover:bg-primary/80 transition-all shadow-sm"
                                                        onClick={(e) => increaseQuantity(product, e)}
                                                    >
                                                        <Plus className="h-3.5 w-3.5 sm:h-3 sm:w-3" />
                                                    </button>
                                                </div>
                                            </div>
                                        </CardContent>
                                    </Card>
                                );
                            })}

                            {filteredProducts.length === 0 && (
                                <div className="col-span-full py-16 text-center text-muted-foreground">
                                    <Empty>
                                        <EmptyHeader>
                                            <EmptyTitle>Ooops...</EmptyTitle>
                                            <EmptyDescription>
                                                Tidak ada data yang ditemukan.
                                            </EmptyDescription>
                                        </EmptyHeader>
                                    </Empty>
                                </div>
                            )}
                        </div>
                    </ScrollArea>
                </div>

                {/* ── Cart Sidebar (Fixed on Desktop) ── */}
                <div className="hidden lg:block lg:col-span-4 h-full min-h-0">
                    <form onSubmit={onSubmit} className="h-full">
                        <Card className="border shadow-xl bg-card overflow-hidden h-full flex flex-col">
                            <div className="flex flex-col h-full">
                                <CardHeader className="border-b py-4 flex-row items-center justify-between shrink-0">
                                    <CardTitle className="flex items-center gap-2 text-base">
                                        <ShoppingCart className="h-4 w-4" />
                                        Keranjang
                                    </CardTitle>
                                    <Badge className="rounded-full font-bold">
                                        {cartTotalItems} pcs
                                    </Badge>
                                </CardHeader>

                                <ScrollArea className="flex-1 min-h-0">
                                    <CardContent className="p-0">
                                        {data.items.length === 0 ? (
                                            <div className="py-16 text-center text-muted-foreground">
                                                <ShoppingCart className="h-10 w-10 mx-auto mb-3 opacity-20" />
                                                <p className="text-sm">Keranjang masih kosong</p>
                                                <p className="text-xs mt-1 opacity-60">Klik produk untuk menambahkan</p>
                                            </div>
                                        ) : (
                                            <div className="divide-y divide-border">
                                                {data.items.map((item) => (
                                                    <div key={item.product_id} className="p-4 space-y-2.5">
                                                        <div className="flex gap-3">
                                                            <div className="h-11 w-11 rounded-md bg-muted overflow-hidden shrink-0 border">
                                                                {item.product?.thumbnail_url ? (
                                                                    <img src={item.product.thumbnail_url} className="h-full w-full object-cover" alt={item.product.name} />
                                                                ) : (
                                                                    <div className="h-full w-full flex items-center justify-center">
                                                                        <ImagePlus className="h-4 w-4 text-muted-foreground/50" />
                                                                    </div>
                                                                )}
                                                            </div>
                                                            <div className="flex-1 min-w-0">
                                                                <h4 className="text-sm font-semibold leading-tight line-clamp-1">{item.product?.name}</h4>
                                                                <p className="text-xs text-primary font-medium mt-0.5">
                                                                    Rp {(item.quantity * item.unit_price).toLocaleString('id-ID')}
                                                                </p>
                                                            </div>
                                                            <Button
                                                                type="button"
                                                                variant="ghost"
                                                                size="icon"
                                                                className="h-7 w-7 shrink-0 text-muted-foreground hover:text-red-500 hover:bg-red-50 dark:hover:bg-red-950/20"
                                                                onClick={() => removeFromCart(item.product_id)}
                                                            >
                                                                <Trash2 className="h-3.5 w-3.5" />
                                                            </Button>
                                                        </div>
                                                        <div className="flex items-center gap-2 text-xs text-muted-foreground">
                                                            <div className="px-2 py-0.5 rounded bg-muted/50 border font-medium text-foreground">
                                                                {item.quantity} pcs
                                                            </div>
                                                            <span>×</span>
                                                            <span className="font-mono">
                                                                Rp {item.unit_price.toLocaleString('id-ID')}
                                                            </span>
                                                        </div>
                                                    </div>
                                                ))}
                                            </div>
                                        )}
                                    </CardContent>
                                </ScrollArea>

                                <div className="p-4 border-t bg-muted/10 space-y-3 shrink-0">
                                    <Field>
                                        <Label htmlFor="purchase_date" className="text-xs text-muted-foreground">Tanggal</Label>
                                        <Popover open={isCalendarOpen} onOpenChange={setIsCalendarOpen}>
                                            <PopoverTrigger asChild>
                                                <Button
                                                    id="purchase_date"
                                                    variant="outline"
                                                    size="sm"
                                                    className={cn("w-full justify-start text-left font-normal h-8 text-xs")}
                                                >
                                                    <CalendarIcon className="mr-1 h-3 w-3" />
                                                    {data.purchase_date ? (
                                                        new Intl.DateTimeFormat("id-ID", {
                                                            day: "numeric",
                                                            month: "long",
                                                            year: "numeric",
                                                        }).format(new Date(data.purchase_date))
                                                    ) : (
                                                        <span className="text-muted-foreground">Pilih Tanggal</span>
                                                    )}
                                                </Button>
                                            </PopoverTrigger>
                                            <PopoverContent className="w-auto overflow-hidden p-0" align="start">
                                                <Calendar
                                                    mode="single"
                                                    selected={data.purchase_date ? new Date(data.purchase_date) : undefined}
                                                    defaultMonth={data.purchase_date ? new Date(data.purchase_date) : new Date()}
                                                    captionLayout="dropdown"
                                                    onSelect={(selectedDate: Date | undefined) => {
                                                        if (selectedDate) {
                                                            setData('purchase_date', format(selectedDate, 'yyyy-MM-dd'));
                                                        } else {
                                                            setData('purchase_date', '');
                                                        }

                                                        setIsCalendarOpen(false);
                                                    }}
                                                />
                                            </PopoverContent>
                                        </Popover>
                                        <FieldError error={errors.purchase_date} label="Tanggal" className="text-xs" />
                                    </Field>

                                    <Field>
                                        <Label htmlFor="note" className="text-xs text-muted-foreground">Catatan</Label>
                                        <Input id="note" className="h-8 text-xs" value={data.note} onChange={e => setData('note', e.target.value)} placeholder="...." />
                                        <FieldError error={errors.note} label="Catatan" className="text-xs" />
                                    </Field>

                                    <div className="rounded-xl bg-primary/10 border border-primary/20 p-3 flex items-center justify-between">
                                        <div>
                                            <p className="text-xs text-muted-foreground">Total Belanja</p>
                                            <p className="text-xl font-bold text-primary">Rp {total.toLocaleString('id-ID')}</p>
                                        </div>
                                        <div className="text-right text-xs text-muted-foreground">
                                            <p>{data.items.length} produk</p>
                                            <p>{cartTotalItems} pcs</p>
                                        </div>
                                    </div>

                                    <Button
                                        type="submit"
                                        className="w-full h-10 font-semibold shadow"
                                        disabled={processing || data.items.length === 0}
                                    >
                                        {processing ? <Loader className="h-4 w-4 animate-spin" /> : <Save className="h-4 w-4" />}
                                        {processing ? 'Menyimpan...' : 'Simpan'}
                                    </Button>
                                </div>
                            </div>
                        </Card>
                    </form>
                </div>

                {/* ── Floating Mobile Cart Trigger ── */}
                <div className="lg:hidden fixed bottom-6 left-0 right-0 px-6 z-50 pointer-events-none">
                    <div className="max-w-md mx-auto pointer-events-auto">
                        <Sheet>
                            <SheetTrigger asChild>
                                <Button
                                    size="lg"
                                    className="w-full rounded-full shadow-2xl h-14 flex items-center justify-between px-6 bg-primary animate-in fade-in slide-in-from-bottom-4 duration-300"
                                >
                                    <div className="flex items-center gap-3">
                                        <div className="bg-primary-foreground/20 rounded-full h-8 w-8 flex items-center justify-center">
                                            <ShoppingCart className="h-4 w-4" />
                                        </div>
                                        <div className="text-left leading-tight">
                                            <p className="text-[10px] opacity-80 uppercase font-bold tracking-wider">Keranjang</p>
                                            <p className="text-sm font-bold">{cartTotalItems} Item</p>
                                        </div>
                                    </div>
                                    <div className="text-right">
                                        <p className="text-[10px] opacity-80 uppercase font-bold tracking-wider">Total</p>
                                        <p className="text-sm font-bold">Rp {total.toLocaleString('id-ID')}</p>
                                    </div>
                                </Button>
                            </SheetTrigger>
                            <SheetContent
                                side="bottom"
                                showCloseButton={false}
                                className="p-0 !h-[85vh] rounded-t-[2.5rem] flex flex-col overflow-hidden gap-0"
                            >
                                {/* Header */}
                                <div className="flex items-center justify-between px-5 pt-5 pb-4 border-b shrink-0">
                                    <div className="flex items-center gap-2 font-semibold text-base">
                                        <ShoppingCart className="h-4 w-4" />
                                        Keranjang
                                    </div>
                                    <div className="flex items-center gap-2">
                                        <Badge className="rounded-full font-bold">
                                            {cartTotalItems} pcs
                                        </Badge>
                                        <SheetClose asChild>
                                            <button
                                                className="h-8 w-8 rounded-full flex items-center justify-center text-muted-foreground hover:bg-muted hover:text-foreground transition-colors"
                                                aria-label="Tutup"
                                            >
                                                <X className="h-4 w-4" />
                                            </button>
                                        </SheetClose>
                                    </div>
                                </div>

                                {/* Scrollable cart items — min-h-0 wajib agar flex-1 bisa scroll */}
                                <div className="flex-1 min-h-0 overflow-y-auto overscroll-contain">
                                    {data.items.length === 0 ? (
                                        <div className="py-16 text-center text-muted-foreground">
                                            <ShoppingCart className="h-10 w-10 mx-auto mb-3 opacity-20" />
                                            <p className="text-sm">Keranjang masih kosong</p>
                                            <p className="text-xs mt-1 opacity-60">Klik produk untuk menambahkan</p>
                                        </div>
                                    ) : (
                                        <div className="divide-y divide-border">
                                            {data.items.map((item) => (
                                                <div key={item.product_id} className="p-4 space-y-2.5">
                                                    <div className="flex gap-3">
                                                        <div className="h-11 w-11 rounded-md bg-muted overflow-hidden shrink-0 border">
                                                            {item.product?.thumbnail_url ? (
                                                                <img src={item.product.thumbnail_url} className="h-full w-full object-cover" alt={item.product.name} />
                                                            ) : (
                                                                <div className="h-full w-full flex items-center justify-center">
                                                                    <ImagePlus className="h-4 w-4 text-muted-foreground/50" />
                                                                </div>
                                                            )}
                                                        </div>
                                                        <div className="flex-1 min-w-0">
                                                            <h4 className="text-sm font-semibold leading-tight line-clamp-1">{item.product?.name}</h4>
                                                            <p className="text-xs text-primary font-medium mt-0.5">
                                                                Rp {(item.quantity * item.unit_price).toLocaleString('id-ID')}
                                                            </p>
                                                        </div>
                                                        <Button
                                                            type="button"
                                                            variant="ghost"
                                                            size="icon"
                                                            className="h-7 w-7 shrink-0 text-muted-foreground hover:text-red-500 hover:bg-red-50 dark:hover:bg-red-950/20"
                                                            onClick={() => removeFromCart(item.product_id)}
                                                        >
                                                            <Trash2 className="h-3.5 w-3.5" />
                                                        </Button>
                                                    </div>
                                                    <div className="flex items-center gap-2 text-xs text-muted-foreground">
                                                        <div className="px-2 py-0.5 rounded bg-muted/50 border font-medium text-foreground">
                                                            {item.quantity} pcs
                                                        </div>
                                                        <span>×</span>
                                                        <span className="font-mono">
                                                            Rp {item.unit_price.toLocaleString('id-ID')}
                                                        </span>
                                                    </div>
                                                </div>
                                            ))}
                                        </div>
                                    )}
                                </div>

                                {/* Footer */}
                                <div className="p-4 border-t bg-muted/10 space-y-3 shrink-0">
                                    <Field>
                                        <Label htmlFor="purchase_date_mobile" className="text-xs text-muted-foreground">Tanggal</Label>
                                        <Popover>
                                            <PopoverTrigger asChild>
                                                <Button
                                                    id="purchase_date_mobile"
                                                    variant="outline"
                                                    size="sm"
                                                    className={cn("w-full justify-start text-left font-normal h-8 text-xs")}
                                                >
                                                    <CalendarIcon className="mr-1 h-3 w-3" />
                                                    {data.purchase_date ? (
                                                        new Intl.DateTimeFormat("id-ID", {
                                                            day: "numeric",
                                                            month: "long",
                                                            year: "numeric",
                                                        }).format(new Date(data.purchase_date))
                                                    ) : (
                                                        <span className="text-muted-foreground">Pilih Tanggal</span>
                                                    )}
                                                </Button>
                                            </PopoverTrigger>
                                            <PopoverContent className="w-auto overflow-hidden p-0" align="start">
                                                <Calendar
                                                    mode="single"
                                                    selected={data.purchase_date ? new Date(data.purchase_date) : undefined}
                                                    defaultMonth={data.purchase_date ? new Date(data.purchase_date) : new Date()}
                                                    captionLayout="dropdown"
                                                    onSelect={(selectedDate: Date | undefined) => {
                                                        if (selectedDate) {
                                                            setData('purchase_date', format(selectedDate, 'yyyy-MM-dd'));
                                                        } else {
                                                            setData('purchase_date', '');
                                                        }
                                                    }}
                                                />
                                            </PopoverContent>
                                        </Popover>
                                    </Field>

                                    <Field>
                                        <Label htmlFor="note_mobile" className="text-xs text-muted-foreground">Catatan</Label>
                                        <Input id="note_mobile" className="h-8 text-xs" value={data.note} onChange={e => setData('note', e.target.value)} placeholder="...." />
                                        <FieldError error={errors.note} label="Catatan" className="text-xs" />
                                    </Field>

                                    <div className="rounded-xl bg-primary/10 border border-primary/20 p-3 flex items-center justify-between">
                                        <div>
                                            <p className="text-xs text-muted-foreground">Total Belanja</p>
                                            <p className="text-xl font-bold text-primary">Rp {total.toLocaleString('id-ID')}</p>
                                        </div>
                                        <div className="text-right text-xs text-muted-foreground">
                                            <p>{data.items.length} produk</p>
                                            <p>{cartTotalItems} pcs</p>
                                        </div>
                                    </div>

                                    <Button
                                        type="button"
                                        className="w-full h-10 font-semibold shadow"
                                        disabled={processing || data.items.length === 0}
                                        onClick={() => onSubmit({ preventDefault: () => { } } as any)}
                                    >
                                        {processing ? <Loader className="h-4 w-4 animate-spin" /> : <Save className="h-4 w-4" />}
                                        {processing ? 'Menyimpan...' : 'Simpan'}
                                    </Button>
                                </div>
                            </SheetContent>
                        </Sheet>
                    </div>
                </div>
            </div>
            {/* Quantity Input Dialog */}
            <Dialog open={qtyDialogIndex !== null} onOpenChange={(open) => {
 if (!open) {
setQtyDialogIndex(null);
} 
}}>
                <DialogContent className="max-w-xs">
                    <DialogHeader>
                        <DialogTitle>Ubah Jumlah</DialogTitle>
                    </DialogHeader>
                    <div className="py-2">
                        <Label className="text-sm mb-2 block">
                            {qtyDialogIndex !== null ? data.items.find(i => i.product_id === qtyDialogIndex)?.product?.name : ''}
                        </Label>
                        <Input
                            type="number"
                            min="1"
                            value={qtyInputValue}
                            onChange={e => setQtyInputValue(e.target.value)}
                            onKeyDown={e => {
 if (e.key === 'Enter') {
confirmQty();
} 
}}
                            className="text-lg font-bold"
                            autoFocus
                        />
                    </div>
                    <DialogFooter>
                        <Button variant="outline" onClick={() => setQtyDialogIndex(null)}>Batal</Button>
                        <Button onClick={confirmQty}>Konfirmasi</Button>
                    </DialogFooter>
                </DialogContent>
            </Dialog>
        </div>
    );
}

PurchaseEdit.layout = {
    breadcrumbs: [{ title: 'Kelola' }],
};