'use client';

import { Suspense, useMemo, useState } from 'react';
import { useSearchParams, useRouter, usePathname } from 'next/navigation';
import { ROBOTS, CATEGORY_LABELS, BRANDS, type RobotCategory, type RobotBrand } from '@/data/robots';
import { RobotProductCard } from '@/components/robotics/RobotProductCard';
import { ProductFilterTabs, type Tab } from '@/components/robotics/ProductFilterTabs';

type Filter = { brand: RobotBrand | 'all'; category: RobotCategory | 'all' };

function CatalogInner() {
  const params = useSearchParams();
  const router = useRouter();
  const pathname = usePathname();

  const initialBrand = (params.get('brand') as RobotBrand) || 'all';
  const initialCategory = (params.get('category') as RobotCategory) || 'all';

  const [filter, setFilter] = useState<Filter>({ brand: initialBrand, category: initialCategory });

  const filtered = useMemo(() => {
    return ROBOTS.filter((r) => {
      if (filter.brand !== 'all' && r.brand !== filter.brand) return false;
      if (filter.category !== 'all' && !r.categories.includes(filter.category)) return false;
      return true;
    });
  }, [filter]);

  const updateFilter = (next: Partial<Filter>) => {
    const newFilter = { ...filter, ...next };
    setFilter(newFilter);
    const sp = new URLSearchParams();
    if (newFilter.brand !== 'all') sp.set('brand', newFilter.brand);
    if (newFilter.category !== 'all') sp.set('category', newFilter.category);
    const qs = sp.toString();
    router.replace(qs ? `${pathname}?${qs}` : pathname, { scroll: false });
  };

  const brandTabs: Tab[] = [
    { id: 'all', label: 'All brands' },
    ...(Object.keys(BRANDS) as RobotBrand[]).map((b) => ({
      id: b,
      label: BRANDS[b].name.split(' ')[0],
      accent: BRANDS[b].accent,
    })),
  ];

  const categoryTabs: Tab[] = [
    { id: 'all', label: 'All' },
    ...(Object.keys(CATEGORY_LABELS) as RobotCategory[]).map((c) => ({
      id: c,
      label: CATEGORY_LABELS[c],
    })),
  ];

  return (
    <div style={{ display: 'flex', flexDirection: 'column', gap: '1.5rem' }}>
      <div className="glass" style={{ padding: '1rem 1.25rem', borderRadius: '1.25rem', display: 'flex', flexWrap: 'wrap', gap: '1.5rem' }}>
        <ProductFilterTabs
          title="Brand"
          tabs={brandTabs}
          activeId={filter.brand}
          onChange={(id) => updateFilter({ brand: id as RobotBrand | 'all' })}
        />
        <ProductFilterTabs
          title="Category"
          tabs={categoryTabs}
          activeId={filter.category}
          onChange={(id) => updateFilter({ category: id as RobotCategory | 'all' })}
        />
      </div>

      <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', flexWrap: 'wrap', gap: '0.5rem' }}>
        <span style={{ color: '#a8a8a8', fontSize: '0.85rem' }}>
          {filtered.length} robot{filtered.length === 1 ? '' : 's'} found
        </span>
        {(filter.brand !== 'all' || filter.category !== 'all') && (
          <button
            type="button"
            onClick={() => updateFilter({ brand: 'all', category: 'all' })}
            style={{
              background: 'transparent',
              border: 'none',
              color: '#e7e7e7',
              fontSize: '0.78rem',
              letterSpacing: '0.14em',
              textTransform: 'uppercase',
              fontWeight: 600,
              cursor: 'pointer',
            }}
          >
            Clear filters
          </button>
        )}
      </div>

      {filtered.length === 0 ? (
        <div className="card" style={{ padding: '2rem', textAlign: 'center', color: '#e7e7e7' }}>
          No robots match these filters yet. Try a different brand or category, or{' '}
          <a href="/contact/" style={{ color: '#e7e7e7', textDecoration: 'none' }}>contact us</a> for tailored options.
        </div>
      ) : (
        <div
          style={{
            display: 'grid',
            gap: '1.25rem',
            gridTemplateColumns: 'repeat(auto-fit, minmax(min(280px, 100%), 1fr))',
          }}
        >
          {filtered.map((r) => (
            <RobotProductCard key={r.id} robot={r} />
          ))}
        </div>
      )}
    </div>
  );
}

export function CatalogClient() {
  return (
    <Suspense fallback={<div className="card" style={{ padding: '2rem', color: '#e7e7e7' }}>Loading catalog…</div>}>
      <CatalogInner />
    </Suspense>
  );
}