// /src/app/components/TeamCard.tsx
'use client'

import { useState, useMemo } from 'react'
import { useRouter } from 'next/navigation'
import Button from './Button'
import TeamPremierRankBadge from './TeamPremierRankBadge'
import type { Team } from '../types/team'

type Props = {
  team: Team
  currentUserSteamId: string
  invitationId?: string
  onUpdateInvitation: (teamId: string, newValue: string | null | 'pending') => void
  adminMode?: boolean
  /** Vom Page-Container gesetzt: ob der Nutzer grundsätzlich Beitritte anfragen darf
   * (false, wenn /api/user ein team liefert). Default: true (abwärtskompatibel). */
  canRequestJoin?: boolean
}

export default function TeamCard({
  team,
  currentUserSteamId,
  invitationId,
  onUpdateInvitation,
  adminMode = false,
  canRequestJoin = true,
}: Props) {
  const router = useRouter()
  const [joining, setJoining] = useState(false)

  const isRequested = Boolean(invitationId)

  // Bin ich bereits in DIESEM Team (Leader, aktiv oder inaktiv)?
  const isMemberOfThisTeam = useMemo(() => {
    const inActive   = (team.activePlayers   ?? []).some(p => String(p.steamId) === String(currentUserSteamId))
    const inInactive = (team.inactivePlayers ?? []).some(p => String(p.steamId) === String(currentUserSteamId))
    const isLeader   = team.leader?.steamId && String(team.leader.steamId) === String(currentUserSteamId)
    return Boolean(inActive || inInactive || isLeader)
  }, [team, currentUserSteamId])

  // Button sperren, wenn:
  // - gerade Request läuft
  // - bereits Mitglied dieses Teams
  // - global keine Join-Anfragen erlaubt (User hat bereits ein Team)
  const isDisabled = joining || isMemberOfThisTeam || !canRequestJoin

  const handleClick = async () => {
    if (joining || isDisabled) return
    setJoining(true)
    try {
      if (isRequested) {
        await fetch('/api/user/invitations/reject', {
          method : 'POST',
          headers: { 'Content-Type': 'application/json' },
          body   : JSON.stringify({ invitationId }),
        })
        onUpdateInvitation(team.id, null)
      } else {
        await fetch('/api/team/request-join', {
          method : 'POST',
          headers: { 'Content-Type': 'application/json' },
          body   : JSON.stringify({ teamId: team.id }),
        })
        onUpdateInvitation(team.id, 'pending')
      }
    } catch (err) {
      console.error('[TeamCard] Join/Reject-Fehler:', err)
    } finally {
      setJoining(false)
    }
  }

  const targetHref = adminMode ? `/admin/teams/${team.id}` : `/team/${team.id}`

  // Label & Farbe abhängig vom Status
  const buttonLabel = joining
    ? (
      <>
        <span
          className="animate-spin inline-block size-4 border-[3px] border-current border-t-transparent rounded-full mr-1"
          role="status"
          aria-label="loading"
        />
        Lädt
      </>
    )
    : (!canRequestJoin || isMemberOfThisTeam)
      ? 'Beitritt nicht möglich'
      : isRequested
        ? 'Angefragt (zurückziehen)'
        : 'Beitritt anfragen'

  const buttonColor =
    isDisabled ? 'gray' : (isRequested ? 'gray' : 'blue')

  return (
    <div
      role="button"
      tabIndex={0}
      onClick={() => router.push(targetHref)}
      onKeyDown={e => (e.key === 'Enter') && router.push(targetHref)}
      className="p-4 border rounded-lg bg-white dark:bg-neutral-800
                 dark:border-neutral-700 shadow-sm hover:shadow-md
                 transition cursor-pointer focus:outline-none
                 hover:scale-105 hover:bg-neutral-200 hover:dark:bg-neutral-700"
    >
      <div className="flex items-center justify-between gap-3 mb-3">
        <div className="flex items-center gap-3">
          <img
            src={team.logo ? `/assets/img/logos/${team.logo}` : `/assets/img/logos/cs2.webp`}
            alt={team.name ?? 'Teamlogo'}
            className="w-12 h-12 rounded-full object-cover border
                       border-gray-200 dark:border-neutral-600"
          />
          <div className="flex items-center gap-2">
            <span className="font-medium truncate text-gray-800 dark:text-neutral-200">
              {team.name ?? 'Team'}
            </span>
            <TeamPremierRankBadge players={team.activePlayers} />
          </div>
        </div>

        {adminMode ? (
          <Button
            title="Verwalten"
            size="md"
            color="blue"
            variant="solid"
            onClick={e => {
              e.stopPropagation()
              router.push(`/admin/teams/${team.id}`)
            }}
          >
            Verwalten
          </Button>
        ) : (
          // 👉 Button immer zeigen – falls nicht möglich: disabled + anderes Label
          <Button
            title={typeof buttonLabel === 'string' ? buttonLabel : undefined}
            size="sm"
            color={buttonColor as any}
            disabled={isDisabled}
            onClick={e => { e.stopPropagation(); handleClick() }}
            aria-disabled={isDisabled ? 'true' : undefined}
          >
            {buttonLabel}
          </Button>
        )}
      </div>

      <div className="flex -space-x-3">
        {[...team.activePlayers, ...team.inactivePlayers].map(p => (
          <img
            key={p.steamId}
            src={p.avatar}
            alt={p.name}
            title={p.name}
            className="w-8 h-8 rounded-full border-2 border-white
                      dark:border-neutral-800 object-cover"
          />
        ))}
      </div>
    </div>
  )
}