'use client'
import { useQuery, gql } from '@/lib/graphql/hooks'
import { useSearchParams, useRouter } from 'next/navigation'
import { useState, useEffect, Suspense } from 'react'
import Link from 'next/link'
import { TeamFlag } from '@/components/team-flag'
import { TrophyIcon, FireIcon } from '@heroicons/react/24/outline'

const SEARCH_QUERY = gql`
  query Search($q: String!) {
    search(query: $q) {
      tournaments { year host winner totalGoals matchesCount }
      teams { name iso2 slug stats { appearances titles } }
      players { playerName goals tournaments team { name iso2 } }
      matches {
        id year round group date scoreFt isQualiPlayoff
        team1 { name iso2 } team2 { name iso2 }
      }
    }
  }
`

interface SearchMatch {
  id: number; year: number; round: string; group?: string | null
  date?: string | null; scoreFt?: number[] | null; isQualiPlayoff: boolean
  team1: { name: string; iso2?: string | null }
  team2: { name: string; iso2?: string | null }
}

function SearchContent() {
  const searchParams = useSearchParams()
  const router = useRouter()
  const initialQ = searchParams.get('q') ?? ''
  const [q, setQ] = useState(initialQ)
  const [debouncedQ, setDebouncedQ] = useState(initialQ)

  useEffect(() => {
    const t = setTimeout(() => {
      setDebouncedQ(q)
      if (q.trim()) router.replace(`/search?q=${encodeURIComponent(q.trim())}`, { scroll: false })
    }, 300)
    return () => clearTimeout(t)
  }, [q, router])

  useEffect(() => {
    document.title = q.trim() ? `"${q.trim()}" · World Cup` : 'Search · World Cup'
  }, [q])

  const skip = debouncedQ.trim().length < 2
  const { data, loading } = useQuery(SEARCH_QUERY, {
    variables: { q: debouncedQ },
    skip,
  })

  const results = data?.search
  const total = skip ? 0 : (
    (results?.tournaments?.length ?? 0) +
    (results?.teams?.length ?? 0) +
    (results?.players?.length ?? 0) +
    (results?.matches?.length ?? 0)
  )

  return (
    <div className="max-w-[1200px] mx-auto px-7 py-10 pb-16">
      <h1 className="font-['Bebas_Neue'] text-[52px] tracking-[0.04em] text-green leading-none mb-6">Search</h1>

      {/* Search input */}
      <div className="relative max-w-lg mb-8">
        <input
          type="text" value={q} onChange={e => setQ(e.target.value)}
          placeholder="Search teams, players, tournaments…"
          autoFocus
          className="w-full pl-10 pr-4 py-3 rounded-2xl text-text text-sm outline-none bg-green/[6%] border-green/20"
        />
        <svg className="absolute left-3.5 top-1/2 -translate-y-1/2 opacity-40" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5">
          <circle cx="11" cy="11" r="8" /><line x1="21" y1="21" x2="16.65" y2="16.65" />
        </svg>
        {loading && <div className="absolute right-3.5 top-1/2 -translate-y-1/2 w-4 h-4 border-2 border-green border-t-transparent rounded-full animate-spin" />}
      </div>

      {/* Prompt */}
      {skip && (
        <div className="flex flex-col items-center py-20 text-center">
          <div className="text-[56px] mb-5">🔍</div>
          <div className="text-green-muted text-base">Search for nations, players, or tournaments…</div>
          <div className="text-green-dark text-sm mt-2">Examples: "Brazil", "Ronaldo", "1966"</div>
        </div>
      )}

      {/* No results */}
      {!skip && !loading && total === 0 && (
        <div className="text-center text-green-dark py-16 text-sm">No results for "{debouncedQ}"</div>
      )}

      {/* Results count */}
      {!skip && total > 0 && (
        <div className="text-[13px] text-green-muted mb-6">{total} result{total !== 1 ? 's' : ''} for "{debouncedQ}"</div>
      )}

      <div className="flex flex-col gap-6">
        {/* Teams */}
        {results?.teams?.length > 0 && (
          <section>
            <h3 className="text-[11px] text-green-muted font-bold tracking-[0.12em] uppercase mb-3">Teams</h3>
            <div className="grid grid-cols-[repeat(auto-fill,minmax(200px,1fr))] gap-2.5">
              {results.teams.map((t: { name: string; iso2?: string | null; slug: string; stats?: { appearances: number; titles: number } | null }) => (
                <Link key={t.name} href={`/teams/${t.slug}`}>
                  <div className="glass-card flex items-center gap-3 p-3 px-4 rounded-xl hover:border-green/25 transition-colors cursor-pointer">
                    <TeamFlag name={t.name} iso2={t.iso2} size="md" />
                    <div>
                      <div className="text-sm font-semibold text-text">{t.name}</div>
                      <div className="text-[10px] text-green-muted">
                        {t.stats?.appearances ?? 0} WCs{t.stats?.titles ? <span className="inline-flex items-center gap-0.5 ml-1">· {t.stats.titles}<TrophyIcon className="w-3 h-3 inline" /></span> : ''}
                      </div>
                    </div>
                  </div>
                </Link>
              ))}
            </div>
          </section>
        )}

        {/* Players */}
        {results?.players?.length > 0 && (
          <section>
            <h3 className="text-[11px] text-green-muted font-bold tracking-[0.12em] uppercase mb-3">Players</h3>
            <div className="grid grid-cols-[repeat(auto-fill,minmax(220px,1fr))] gap-2.5">
              {results.players.map((p: { playerName: string; goals: number; tournaments: number; team?: { name: string; iso2?: string | null } | null }) => (
                <Link key={p.playerName} href={`/players/${encodeURIComponent(p.playerName)}`}>
                  <div className="glass-card flex items-center gap-3 p-3 px-4 rounded-xl hover:border-green/25 transition-colors cursor-pointer">
                    {p.team && <TeamFlag name={p.team.name} iso2={p.team.iso2} size="sm" />}
                    <div className="flex-1 min-w-0">
                      <div className="text-sm font-semibold text-text truncate">{p.playerName}</div>
                      <div className="text-[10px] text-green-muted">{p.team?.name} · {p.tournaments} WC{p.tournaments !== 1 ? 's' : ''}</div>
                    </div>
                    <span className="font-['Bebas_Neue'] text-xl text-green flex-shrink-0 inline-flex items-center gap-0.5">{p.goals}<FireIcon className="w-3.5 h-3.5" /></span>
                  </div>
                </Link>
              ))}
            </div>
          </section>
        )}

        {/* Tournaments */}
        {results?.tournaments?.length > 0 && (
          <section>
            <h3 className="text-[11px] text-green-muted font-bold tracking-[0.12em] uppercase mb-3">Tournaments</h3>
            <div className="grid grid-cols-[repeat(auto-fill,minmax(180px,1fr))] gap-2.5">
              {results.tournaments.map((t: { year: number; host: string; winner?: string | null; totalGoals?: number | null; matchesCount?: number | null }) => (
                <Link key={t.year} href={`/tournaments/${t.year}`}>
                  <div className="glass-card p-4 rounded-xl hover:border-green/25 transition-colors cursor-pointer">
                    <div className="font-['Bebas_Neue'] text-3xl text-green">{t.year}</div>
                    <div className="text-sm text-text">{t.host}</div>
                    {t.winner && <div className="text-[10px] text-green-muted mt-1 flex items-center gap-1"><TrophyIcon className="w-3 h-3 flex-shrink-0" />{t.winner}</div>}
                    {t.totalGoals && <div className="text-[10px] text-green-dark flex items-center gap-1"><FireIcon className="w-3 h-3 flex-shrink-0" />{t.totalGoals} goals</div>}
                  </div>
                </Link>
              ))}
            </div>
          </section>
        )}

        {/* Matches */}
        {results?.matches?.length > 0 && (
          <section>
            <h3 className="text-[11px] text-green-muted font-bold tracking-[0.12em] uppercase mb-3">Matches</h3>
            <div className="flex flex-col gap-2">
              {results.matches.map((m: SearchMatch) => (
                <Link key={m.id} href={`/tournaments/${m.year}#match-${m.id}`}>
                  <div className="glass-card flex items-center gap-3 p-3 px-4 rounded-xl hover:border-green/25 transition-colors cursor-pointer">
                    <TeamFlag name={m.team1.name} iso2={m.team1.iso2} size="sm" />
                    <div className="flex-1 text-sm text-text">{m.team1.name} vs {m.team2.name}</div>
                    {m.scoreFt && <span className="font-['Bebas_Neue'] text-lg text-green">{m.scoreFt[0]}–{m.scoreFt[1]}</span>}
                    <TeamFlag name={m.team2.name} iso2={m.team2.iso2} size="sm" />
                    <div className="text-[10px] text-green-muted whitespace-nowrap">{m.year} · {m.round}</div>
                  </div>
                </Link>
              ))}
            </div>
          </section>
        )}
      </div>
    </div>
  )
}

export default function SearchPage() {
  return (
    <Suspense fallback={<div className="p-10 text-green-muted">Loading…</div>}>
      <SearchContent />
    </Suspense>
  )
}