'use client';

import { useState } from 'react';
import { OrderItem } from '@/lib/types';
import { cn, formatDate, formatCurrency, parseCoordinates } from '@/lib/utils';
import { getItemDisplayDescription, getItemDisplayQty } from '@/lib/pocketbase';
import {
  Check,
  AlertTriangle,
  Navigation,
  ChevronDown,
  ChevronUp,
  Package,
  Wrench,
  Hammer,
  ShoppingCart,
  AlertCircle,
  Clock,
  MapPin,
} from 'lucide-react';

interface CollectionItemProps {
  item: OrderItem;
  supplierColor?: { dot: string; light: string; text: string; ring: string };
  compact?: boolean;
  onCollect: (item: OrderItem) => void;
  onProblem: (item: OrderItem) => void;
  onNavigate: (lat: number, lng: number, name: string) => void;
}

function getItemType(item: OrderItem): {
  type: string;
  icon: React.ReactNode;
  color: string;
  bgColor: string;
  label: string;
} {
  if (item.problem_flag) {
    return {
      type: 'problem',
      icon: <AlertTriangle size={16} />,
      color: 'text-[#b3224a]',
      bgColor: 'bg-[#fbeaef]',
      label: 'Problem',
    };
  }

  const orderNumber = item.expand?.order?.order_number || '';

  if (orderNumber.toLowerCase().includes('breakdown')) {
    return {
      type: 'breakdown',
      icon: <Hammer size={16} />,
      color: 'text-[#8a5a02]',
      bgColor: 'bg-[#fcf3d8]',
      label: 'Breakdown',
    };
  }

  if (orderNumber.toLowerCase().includes('repair')) {
    return {
      type: 'repair',
      icon: <Wrench size={16} />,
      color: 'text-[#8a5a02]',
      bgColor: 'bg-[#f6e3a4]',
      label: 'Repair',
    };
  }

  if (item.is_stock_item) {
    return {
      type: 'stock',
      icon: <Package size={16} />,
      color: 'text-[#4a3d6b]',
      bgColor: 'bg-[#ece8f3]',
      label: 'Stock',
    };
  }

  return {
    type: 'normal',
    icon: <ShoppingCart size={16} />,
    color: 'text-[#26251e]',
    bgColor: 'bg-[#ebeae5]',
    label: 'Order',
  };
}

export default function CollectionItemCard({
  item,
  supplierColor,
  compact,
  onCollect,
  onProblem,
  onNavigate,
}: CollectionItemProps) {
  const [expanded, setExpanded] = useState(false);

  const supplier = item.expand?.supplier;
  const itemType = getItemType(item);
  const coords = parseCoordinates(supplier?.coordinates);
  const hasCoords = coords !== null;
  // Per the project brief: prefer the supplier-facing description on the
  // pickup screen; fall back to the customer-facing description.
  const description = getItemDisplayDescription(item);
  // Per the brief: prefer order_qty; falls back to quantity.
  const expectedQty = getItemDisplayQty(item);

  return (
    <article
      className={cn(
        compact
          ? 'bg-[#ebeae5] rounded-xl overflow-hidden'
          : 'bg-[#e6e5e0] rounded-2xl card-press overflow-hidden border border-[rgba(38,37,30,0.1)]',
        item.problem_flag && 'ring-1 ring-[#cf2d56]'
      )}
    >
      {/* Header */}
      <button
        className="w-full text-left p-4 active:bg-[rgba(38,37,30,0.04)] transition-colors"
        onClick={() => setExpanded(!expanded)}
        aria-expanded={expanded}
        aria-controls={`item-${item.id}-details`}
      >
        <div className="flex items-start gap-3">
          {/* Type icon */}
          <div className={cn(
            'w-9 h-9 rounded-xl flex items-center justify-center flex-shrink-0 mt-0.5',
            itemType.bgColor
          )} aria-hidden="true">
            <span className={itemType.color}>{itemType.icon}</span>
          </div>

          <div className="flex-1 min-w-0">
            <div className="flex items-center gap-2 mb-0.5">
              <h3 className="font-semibold text-[15px] text-[#26251e] truncate leading-snug">
                {description}
              </h3>
            </div>

            {/* If the customer-facing description differs from the
                supplier-facing one we just rendered, surface the
                customer one as a smaller sub-line so the driver can
                spot a discrepancy on pickup. */}
            {item.description && item.po_description && item.description.trim() !== item.po_description.trim() && (
              <p className="text-[11px] text-[rgba(38,37,30,0.55)] truncate -mt-0.5 mb-0.5">
                customer line: {item.description}
              </p>
            )}

            <div className="flex items-center gap-1.5 flex-wrap">
              <span className={cn(
                'text-[10px] px-2 py-0.5 rounded-full font-semibold uppercase tracking-wide',
                itemType.type === 'problem' && 'bg-[#f3c4d2] text-[#8a1b3a]',
                itemType.type === 'breakdown' && 'bg-[#f6e3a4] text-[#8a5a02]',
                itemType.type === 'repair' && 'bg-[#f6e3a4] text-[#8a5a02]',
                itemType.type === 'stock' && 'bg-[#d4cae3] text-[#4a3d6b]',
                itemType.type === 'normal' && 'bg-[#ebeae5] text-[#26251e]'
              )}>
                {itemType.label}
              </span>
              <span className="text-xs text-[rgba(38,37,30,0.6)]">Qty: {expectedQty}</span>
              {item.sku && (
                <span className="text-[10px] text-[rgba(38,37,30,0.55)] font-mono">#{item.sku}</span>
              )}
              {item.assigned_at && (
                <span className="text-[10px] text-[rgba(38,37,30,0.45)] flex items-center gap-0.5">
                  <Clock size={9} aria-hidden="true" />
                  assigned {formatDate(item.assigned_at)}
                </span>
              )}
            </div>

            {supplier?.suppliername && (
              <div className="flex items-center gap-1 mt-1.5">
                <MapPin size={12} className="text-[rgba(38,37,30,0.4)] flex-shrink-0" aria-hidden="true" />
                <span className="text-xs text-[rgba(38,37,30,0.55)] truncate">{supplier.suppliername}</span>
              </div>
            )}
          </div>

          <div className="flex items-center gap-2 flex-shrink-0">
            {item.selling_price && expectedQty > 0 && (
              <span className="text-xs font-semibold text-[#125a3e]">
                {formatCurrency(item.selling_price * expectedQty)}
              </span>
            )}
            {expanded ? (
              <ChevronUp size={18} className="text-[rgba(38,37,30,0.55)]" aria-hidden="true" />
            ) : (
              <ChevronDown size={18} className="text-[rgba(38,37,30,0.55)]" aria-hidden="true" />
            )}
          </div>
        </div>
      </button>

      {/* Expanded Details */}
      {expanded && (
        <div
          id={`item-${item.id}-details`}
          className="px-4 pb-4 border-t border-[rgba(38,37,30,0.08)] animate-fade-in"
        >
          <div className="pt-3 space-y-3">
            {/* Notes */}
            {item.notes && (
              <div className="bg-[#fcf3d8] border border-[#f6e3a4] rounded-xl p-3">
                <p className="text-xs text-[#8a5a02] flex items-start gap-2">
                  <AlertCircle size={14} className="flex-shrink-0 mt-0.5" aria-hidden="true" />
                  <span className="selectable">{item.notes}</span>
                </p>
              </div>
            )}

            {item.problem_notes && (
              <div className="bg-[#fbeaef] border border-[#f3c4d2] rounded-xl p-3">
                <p className="text-xs text-[#8a1b3a] flex items-start gap-2">
                  <AlertTriangle size={14} className="flex-shrink-0 mt-0.5" aria-hidden="true" />
                  <span className="selectable">{item.problem_notes}</span>
                </p>
              </div>
            )}

            {/* Details grid */}
            <dl className="grid grid-cols-2 gap-2 text-xs">
              {item.expand?.order?.order_number && (
                <div className="bg-[#ebeae5] rounded-lg p-2">
                  <dt className="text-[rgba(38,37,30,0.55)]">Order</dt>
                  <dd className="text-[#26251e] font-medium">{item.expand.order.order_number}</dd>
                </div>
              )}
              {item.expand?.purchase_order?.po_number && (
                <div className="bg-[#ebeae5] rounded-lg p-2">
                  <dt className="text-[rgba(38,37,30,0.55)]">PO</dt>
                  <dd className="text-[#26251e] font-medium">{item.expand.purchase_order.po_number}</dd>
                </div>
              )}
              {supplier?.supplieraddress && (
                <div className="bg-[#ebeae5] rounded-lg p-2 col-span-2">
                  <dt className="text-[rgba(38,37,30,0.55)]">Address</dt>
                  <dd className="text-[#26251e] font-medium selectable">{supplier.supplieraddress}</dd>
                </div>
              )}
            </dl>

            {/* Action Buttons */}
            <div className="grid grid-cols-3 gap-2 pt-1">
              <button
                onClick={() => onCollect(item)}
                aria-label={`Mark ${description} as collected`}
                className="flex flex-col items-center justify-center gap-1 py-3 rounded-xl bg-[#1f8a65] text-white active:bg-[#125a3e] transition-colors touch-manipulation press-feedback-sm min-h-[56px]"
              >
                <Check size={18} strokeWidth={2.5} aria-hidden="true" />
                <span className="text-xs font-semibold">Collect</span>
              </button>

              <button
                onClick={() => onProblem(item)}
                aria-label={`Report problem with ${description}`}
                className="flex flex-col items-center justify-center gap-1 py-3 rounded-xl bg-[#cf2d56] text-white active:bg-[#8a1b3a] transition-colors touch-manipulation press-feedback-sm min-h-[56px]"
              >
                <AlertTriangle size={18} strokeWidth={2.5} aria-hidden="true" />
                <span className="text-xs font-semibold">Problem</span>
              </button>

              {hasCoords && coords && supplier ? (
                <button
                  onClick={() => onNavigate(coords.latitude, coords.longitude, supplier.suppliername)}
                  aria-label={`Navigate to ${supplier.suppliername}`}
                  className="flex flex-col items-center justify-center gap-1 py-3 rounded-xl bg-[#f54e00] text-white active:bg-[#d44200] transition-colors touch-manipulation press-feedback-sm min-h-[56px]"
                >
                  <Navigation size={18} strokeWidth={2.5} aria-hidden="true" />
                  <span className="text-xs font-semibold">Navigate</span>
                </button>
              ) : (
                <div className="flex flex-col items-center justify-center gap-1 py-3 rounded-xl bg-[rgba(38,37,30,0.06)] text-[rgba(38,37,30,0.4)] min-h-[56px]" aria-label="No GPS coordinates available">
                  <Navigation size={18} aria-hidden="true" />
                  <span className="text-xs font-medium">No GPS</span>
                </div>
              )}
            </div>
          </div>
        </div>
      )}
    </article>
  );
}