'use client';

import { OrderItem, Supplier } from '@/lib/types';
import { cn, formatCurrency, parseCoordinates } from '@/lib/utils';
import CollectionItemCard from '@/components/CollectionItemCard';
import {
  ChevronDown,
  ChevronUp,
  MapPin,
  Navigation,
  Package,
  ShoppingCart,
  Hammer,
  Wrench,
  AlertTriangle,
} from 'lucide-react';

interface SupplierColor {
  border: string;
  dot: string;
  light: string;
  text: string;
  ring: string;
}

interface SupplierGroupProps {
  supplier: Supplier;
  items: OrderItem[];
  color: SupplierColor;
  isExpanded: boolean;
  viewMode: 'compact' | 'detailed';
  onToggle: () => void;
  onCollect: (item: OrderItem) => void;
  onProblem: (item: OrderItem) => void;
  onNavigate: (lat: number, lng: number, name: string) => void;
}

function getItemIcon(item: OrderItem) {
  if (item.item_status === 'problem' || item.problem_flag) return <AlertTriangle size={12} className="text-red-500" />;
  const orderNumber = item.expand?.order?.order_number || '';
  if (orderNumber.toLowerCase().includes('breakdown')) return <Hammer size={12} className="text-orange-500" />;
  if (orderNumber.toLowerCase().includes('repair')) return <Wrench size={12} className="text-amber-500" />;
  if (item.is_stock_item) return <Package size={12} className="text-violet-500" />;
  return <ShoppingCart size={12} className="text-gray-400" />;
}

export default function SupplierGroup({
  supplier,
  items,
  color,
  isExpanded,
  viewMode,
  onToggle,
  onCollect,
  onProblem,
  onNavigate,
}: SupplierGroupProps) {
  const coords = parseCoordinates(supplier.coordinates);
  const hasCoords = coords !== null;
  const totalQty = items.reduce((sum, i) => sum + (i.order_qty || i.quantity || 0), 0);

  return (
    <div
      className={cn(
        'bg-white rounded-2xl card-shadow overflow-hidden transition-all duration-200',
        `border-l-[4px] ${color.border}`
      )}
    >
      {/* Supplier Header — always visible, tap to expand/collapse */}
      <button
        onClick={onToggle}
        className="w-full text-left p-4 active:bg-gray-50/50 transition-colors"
      >
        <div className="flex items-center gap-3">
          {/* Color dot */}
          <div className={cn('w-9 h-9 rounded-xl flex items-center justify-center flex-shrink-0', color.light)}>
            <MapPin size={16} className={color.text} />
          </div>

          <div className="flex-1 min-w-0">
            <h2 className={cn('font-semibold text-sm truncate leading-snug', color.text)}>
              {supplier.suppliername}
            </h2>
            {supplier.supplieraddress && (
              <p className="text-[11px] text-gray-400 truncate mt-0.5">{supplier.supplieraddress}</p>
            )}
          </div>

          {/* Right side info */}
          <div className="flex items-center gap-2 flex-shrink-0">
            <div className="flex flex-col items-end gap-0.5">
              <span className={cn('text-[11px] font-bold', color.text)}>
                {items.length} item{items.length !== 1 ? 's' : ''}
              </span>
              <span className="text-[10px] text-gray-400">{totalQty} total</span>
            </div>
            <div className="flex items-center justify-center w-7 h-7">
              {isExpanded ? (
                <ChevronUp size={18} className="text-gray-400" />
              ) : (
                <ChevronDown size={18} className="text-gray-400" />
              )}
            </div>
          </div>
        </div>

        {/* Compact preview line (only when collapsed in compact mode) */}
        {viewMode === 'compact' && !isExpanded && (
          <div className="mt-2 ml-12 flex items-center gap-1.5 flex-wrap">
            {items.slice(0, 3).map((item, i) => (
              <span key={item.id} className="text-[11px] text-gray-500 truncate max-w-[140px]">
                {item.description || 'Item'}
                {i < Math.min(items.length, 3) - 1 && ','}
              </span>
            ))}
            {items.length > 3 && (
              <span className="text-[10px] text-gray-400 font-medium">
                +{items.length - 3} more
              </span>
            )}
          </div>
        )}
      </button>

      {/* Expanded content */}
      {isExpanded && (
        <div className="border-t border-gray-100 animate-fade-in">
          {viewMode === 'compact' ? (
            /* COMPACT MODE: simple list with item name + qty */
            <div className="divide-y divide-gray-50">
              {items.map((item) => {
                const expectedQty = item.order_qty || item.quantity || 0;
                return (
                  <div
                    key={item.id}
                    className="flex items-center justify-between px-4 py-3 hover:bg-gray-50/50 transition-colors cursor-pointer active:bg-gray-100"
                    onClick={() => {
                      // Determine if we should open collect or problem modal
                      // For now, just expand - user can use the action buttons
                    }}
                  >
                    <div className="flex items-center gap-2.5 min-w-0 flex-1">
                      {getItemIcon(item)}
                      <span className="text-sm text-gray-800 truncate">
                        {item.description || 'Unknown item'}
                      </span>
                      {item.item_status === 'problem' && (
                        <span className="text-[10px] px-1.5 py-0.5 rounded-full bg-red-100 text-red-700 font-medium flex-shrink-0">
                          Problem
                        </span>
                      )}
                    </div>
                    <div className="flex items-center gap-3 flex-shrink-0 ml-2">
                      <span className="text-sm font-semibold text-gray-700">{expectedQty}×</span>
                      <div className="flex items-center gap-1">
                        <button
                          onClick={(e) => { e.stopPropagation(); onCollect(item); }}
                          className="w-8 h-8 rounded-lg bg-green-500 text-white flex items-center justify-center active:bg-green-600 transition-colors touch-manipulation"
                        >
                          <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="3" strokeLinecap="round" strokeLinejoin="round"><polyline points="20 6 9 17 4 12"/></svg>
                        </button>
                        <button
                          onClick={(e) => { e.stopPropagation(); onProblem(item); }}
                          className="w-8 h-8 rounded-lg bg-red-500 text-white flex items-center justify-center active:bg-red-600 transition-colors touch-manipulation"
                        >
                          <AlertTriangle size={14} />
                        </button>
                      </div>
                    </div>
                  </div>
                );
              })}
            </div>
          ) : (
            /* DETAILED MODE: full item cards */
            <div className="p-3 space-y-2">
              {items.map((item) => (
                <CollectionItemCard
                  key={item.id}
                  item={item}
                  supplierColor={color}
                  compact
                  onCollect={onCollect}
                  onProblem={onProblem}
                  onNavigate={onNavigate}
                />
              ))}
            </div>
          )}

          {/* Supplier footer with navigate button */}
          {hasCoords && coords && (
            <div className="px-4 pb-3">
              <button
                onClick={() => onNavigate(coords.latitude, coords.longitude, supplier.suppliername)}
                className={cn(
                  'w-full flex items-center justify-center gap-2 py-2.5 rounded-xl text-sm font-semibold text-white transition-all touch-manipulation press-feedback',
                  color.dot
                )}
              >
                <Navigation size={14} />
                Navigate to {supplier.suppliername}
              </button>
            </div>
          )}
        </div>
      )}
    </div>
  );
}