import { Link } from 'react-router-dom';
import { Avatar, AvatarFallback, AvatarImage } from '@/components/ui/avatar';
import { Users, ChevronRight, MapPin } from 'lucide-react';
import { useCrewsByFocus } from '@/hooks/useCrews';
import { CREW_FOCUS_LABELS, crewFocusForServiceType, type SkateCrew, type CrewFocus } from '@/lib/types';
import { Skeleton } from '@/components/ui/skeleton';

/** The Lab page's own ServiceType union (kept in sync with LabPage). */
type ServiceType =
  | 'coaching' | 'filming' | 'editing' | 'photography' | 'building'
  | 'art' | 'graffiti' | 'tattoo' | 'training' | 'music' | 'judging' | 'organizing' | 'barbering';

/** Translate the Lab page's ServiceType into a crew focus scene (or null). */
function focusForLabService(serviceType: ServiceType): Exclude<CrewFocus, 'mixed'> | null {
  switch (serviceType) {
    // No crew scene maps to judges or organizers — better to show nothing than
    // to fall through to "Photo & Film" and imply a wrong association.
    case 'judging':
    case 'organizing':
    case 'barbering':
      return null;
    case 'art':
    case 'graffiti':
    case 'tattoo':
      return 'art';
    case 'music':
      return 'music';
    case 'training':
      return 'wellness';
    case 'building':
      return crewFocusForServiceType('building');
    case 'coaching':
      return crewFocusForServiceType('coaching');
    default:
      return crewFocusForServiceType('filming'); // filming / editing / photography → photo
  }
}

function CrewChip({ crew }: { crew: SkateCrew }) {
  return (
    <Link
      to={`/crew/${crew.pubkey}/${crew.identifier}`}
      className="group flex w-56 flex-shrink-0 items-center gap-3 rounded-2xl border border-teal-500/20 bg-white/[0.03] p-3 transition-all hover:border-teal-500/50 hover:bg-white/[0.06] active:scale-[0.99]"
    >
      <Avatar className="h-11 w-11 rounded-xl border border-teal-500/30">
        <AvatarImage src={crew.image} alt={crew.name} className="object-cover" />
        <AvatarFallback className="rounded-xl bg-teal-900/40 text-teal-300 font-black text-sm">
          {crew.name.slice(0, 2).toUpperCase()}
        </AvatarFallback>
      </Avatar>
      <div className="min-w-0 flex-1">
        <p className="truncate text-sm font-black text-white leading-tight">{crew.name}</p>
        {crew.location ? (
          <p className="mt-0.5 flex items-center gap-1 truncate text-xs text-gray-400">
            <MapPin className="h-3 w-3 flex-shrink-0 text-teal-400" />
            {crew.location}
          </p>
        ) : (
          <p className="mt-0.5 flex items-center gap-1 text-xs text-gray-500">
            <Users className="h-3 w-3 text-teal-400" />
            {crew.members.length} {crew.members.length === 1 ? 'member' : 'members'}
          </p>
        )}
      </div>
      <ChevronRight className="h-4 w-4 flex-shrink-0 text-gray-600 group-hover:text-teal-400" />
    </Link>
  );
}

/**
 * A horizontal strip of crews that share the active Lab scene's focus.
 * Shown beneath the Lab results so crews and individual service providers
 * cross-reference each other. Renders nothing when there are no matching crews.
 */
export function LabCrewsStrip({ serviceType }: { serviceType: ServiceType }) {
  const focus = focusForLabService(serviceType);
  const { data: crews, isLoading } = useCrewsByFocus(focus, 20);

  // No matching crew scene for this Lab tab — don't show a strip at all.
  if (!focus) return null;

  // Only render the section when there's something to show (or while loading).
  if (!isLoading && (!crews || crews.length === 0)) return null;

  return (
    <section className="mt-8">
      <div className="mb-3 flex items-center justify-between gap-3">
        <h2 className="flex items-center gap-2 text-sm font-black uppercase tracking-wide text-teal-400">
          <Users className="h-4 w-4" />
          Crews in this scene
          <span className="rounded-full bg-teal-500/15 px-2 py-0.5 text-[10px] font-bold text-teal-300">
            {CREW_FOCUS_LABELS[focus]}
          </span>
        </h2>
        <Link
          to="/crews"
          className="flex items-center gap-0.5 text-xs font-bold text-gray-400 hover:text-teal-300"
        >
          All crews <ChevronRight className="h-3.5 w-3.5" />
        </Link>
      </div>

      <div className="-mx-4 flex gap-3 overflow-x-auto px-4 pb-2 scroll-container">
        {isLoading
          ? Array.from({ length: 3 }).map((_, i) => (
              <div key={i} className="flex w-56 flex-shrink-0 items-center gap-3 rounded-2xl border border-white/5 p-3">
                <Skeleton className="h-11 w-11 rounded-xl" />
                <div className="flex-1 space-y-2">
                  <Skeleton className="h-3.5 w-28" />
                  <Skeleton className="h-3 w-20" />
                </div>
              </div>
            ))
          : crews?.map((crew) => <CrewChip key={`${crew.pubkey}:${crew.identifier}`} crew={crew} />)}
      </div>
    </section>
  );
}