'use client';

import React, { useEffect, useState, use } from 'react';
import { useRouter, useSearchParams } from 'next/navigation';
import {
  Club,
  ClubMetrics,
  ClubUpcomingRide,
  ClubMember,
  ClubActivityItem,
  ClubRole,
  UserPortalPermissions,
} from '../../../../components/founder-portal/types';
import {
  fetchClubData,
  getPortalPermissions,
  sanitizePortalError,
} from '../../../../lib/club-data';
import { FounderPortalShell } from '../../../../components/founder-portal/founder-portal-shell';
import { FounderOverview } from '../../../../components/founder-portal/founder-overview';
import { OverviewSkeleton } from '../../../../components/founder-portal/skeleton-state';
import { SafeErrorState } from '../../../../components/founder-portal/safe-error-state';
import { firebaseAuth } from '../../../../lib/firebase-client';

interface PageProps {
  params: Promise<{ clubId: string }>;
}

export default function ClubFounderPortalPage({ params }: PageProps) {
  const { clubId } = use(params);
  const router = useRouter();
  const searchParams = useSearchParams();

  const [club, setClub] = useState<Club | null>(null);
  const [metrics, setMetrics] = useState<ClubMetrics | null>(null);
  const [upcomingRides, setUpcomingRides] = useState<ClubUpcomingRide[]>([]);
  const [pendingApplications, setPendingApplications] = useState<ClubMember[]>([]);
  const [activities, setActivities] = useState<ClubActivityItem[]>([]);
  const [userRole, setUserRole] = useState<ClubRole>('owner');
  const [userRank, setUserRank] = useState('President');

  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [activeNav, setActiveNav] = useState('overview');

  async function loadData() {
    setLoading(true);
    setError(null);
    try {
      await firebaseAuth.authStateReady();
      const currentUser = firebaseAuth.currentUser;
      const isDemoPreview = searchParams?.get('preview') === 'demo';
      const data = await fetchClubData(clubId, currentUser?.uid, {
        allowDemoPreview: isDemoPreview,
      });
      setClub(data.club);
      setMetrics(data.metrics);
      setUpcomingRides(data.upcomingRides);
      setPendingApplications(data.pendingApplications);
      setActivities(data.activities);
      setUserRole(data.userRole);
      setUserRank(data.userRank);
    } catch (err) {
      setError(sanitizePortalError(err, "Club information couldn't be loaded."));
    } finally {
      setLoading(false);
    }
  }

  useEffect(() => {
    void loadData();
  }, [clubId]);

  const permissions: UserPortalPermissions = getPortalPermissions(userRole, true);

  if (loading) {
    return (
      <div className="min-h-screen bg-brand-bg telemetry-grid-bg p-6 flex items-center justify-center">
        <div className="w-full max-w-5xl">
          <OverviewSkeleton />
        </div>
      </div>
    );
  }

  // Unauthenticated Guard
  const isDemo = searchParams?.get('preview') === 'demo';
  if (!firebaseAuth.currentUser && !isDemo) {
    return (
      <div className="min-h-screen bg-brand-bg telemetry-grid-bg flex items-center justify-center p-4 sm:p-6">
        <SafeErrorState
          title="Authentication Required"
          message="Sign in with your rider account to access this club's management portal."
          actionLabel="Sign In"
          onAction={() => router.push(`/login?returnUrl=/clubs/${clubId}/manage`)}
        />
      </div>
    );
  }

  if (error || !club || !metrics) {
    return (
      <div className="min-h-screen bg-brand-bg telemetry-grid-bg flex items-center justify-center p-4 sm:p-6">
        <SafeErrorState
          title="Club Unavailable"
          message={error ?? "Club information couldn't be loaded."}
          actionLabel="Return to Clubs"
          onAction={() => router.push('/clubs')}
          onRetry={loadData}
        />
      </div>
    );
  }

  // Member Access Guard: Non-admin members are forbidden from administrative portal
  const isDev = process.env.NODE_ENV === 'development';
  if (!isDev && userRole !== 'owner' && userRole !== 'admin') {
    return (
      <div className="min-h-screen bg-brand-bg telemetry-grid-bg flex items-center justify-center p-4 sm:p-6">
        <SafeErrorState
          title="Management Access Restricted"
          message="You must be an Owner or Admin of this Club to access the Founder Portal."
          actionLabel="Return to Clubs"
          onAction={() => router.push('/clubs')}
        />
      </div>
    );
  }

  return (
    <FounderPortalShell
      club={club}
      permissions={permissions}
      activeNav={activeNav}
      onNavSelect={(nav: string) => setActiveNav(nav)}
      onSwitchRole={(newRole: ClubRole) => setUserRole(newRole)}
      pendingApplicationsCount={pendingApplications.length}
      upcomingRidesCount={upcomingRides.length}
    >
      <FounderOverview
        club={club}
        metrics={metrics}
        upcomingRides={upcomingRides}
        pendingApplications={pendingApplications}
        activities={activities}
        permissions={permissions}
        onRefresh={loadData}
      />
    </FounderPortalShell>
  );
}