'use client';

import React from 'react';
import Image from 'next/image';
import Link from 'next/link';
import {
  Calendar,
  Trophy,
  Users,
  Star,
  Clock,
  Flag,
  ChevronRight,
  Target,
  Award,
  Activity,
  Play,
  Medal,
  UserPlus,
} from 'lucide-react';

import Card from '@/components/ui/Card';
import Button from '@/components/ui/Button';
import { StatCard } from '@/components/dashboard/StatCard';
import { LeagueStandingItem } from '@/components/dashboard/LeagueStandingItem';
import { UpcomingRaceItem } from '@/components/dashboard/UpcomingRaceItem';
import { FriendItem } from '@/components/dashboard/FriendItem';
import { FeedItemRow } from '@/components/dashboard/FeedItemRow';

import { useDashboardOverview } from '@/hooks/useDashboardService';
import { getCountryFlag } from '@/lib/utilities/country';
import { getGreeting, timeUntil } from '@/lib/utilities/time';

export default function DashboardPage() {
    const { data: dashboardData, isLoading, error } = useDashboardOverview();

    if (isLoading) {
      return (
        <main className="min-h-screen bg-deep-graphite flex items-center justify-center">
          <div className="text-white">Loading dashboard...</div>
        </main>
      );
    }

    if (error || !dashboardData) {
      return (
        <main className="min-h-screen bg-deep-graphite flex items-center justify-center">
          <div className="text-red-400">Failed to load dashboard</div>
        </main>
      );
    }

    const currentDriver = dashboardData.currentDriver;
    const nextRace = dashboardData.nextRace;
    const upcomingRaces = dashboardData.upcomingRaces;
    const leagueStandingsSummaries = dashboardData.leagueStandings;
    const feedSummary = { items: dashboardData.feedItems };
    const friends = dashboardData.friends;
    const activeLeaguesCount = dashboardData.activeLeaguesCount;

    const { totalRaces, wins, podiums, rating, globalRank, consistency } = currentDriver;

  return (
    <main className="min-h-screen bg-deep-graphite">
      {/* Hero Section */}
      <section className="relative overflow-hidden">
        {/* Background Pattern */}
        <div className="absolute inset-0 bg-gradient-to-br from-primary-blue/10 via-deep-graphite to-purple-600/5" />
        <div className="absolute inset-0 opacity-5">
          <div className="absolute inset-0" style={{
            backgroundImage: `url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.4'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")`,
          }} />
        </div>

        <div className="relative max-w-7xl mx-auto px-6 py-10">
          <div className="flex flex-col lg:flex-row lg:items-center lg:justify-between gap-8">
            {/* Welcome Message */}
            <div className="flex items-start gap-5">
              <div className="relative">
                <div className="w-20 h-20 rounded-2xl bg-gradient-to-br from-primary-blue to-purple-600 p-0.5 shadow-xl shadow-primary-blue/20">
                  <div className="w-full h-full rounded-xl overflow-hidden bg-iron-gray">
                    <Image
                      src={currentDriver.avatarUrl}
                      alt={currentDriver.name}
                      width={80}
                      height={80}
                      className="w-full h-full object-cover"
                    />
                  </div>
                </div>
                <div className="absolute -bottom-1 -right-1 w-5 h-5 rounded-full bg-performance-green border-3 border-deep-graphite" />
              </div>
              <div>
                <p className="text-gray-400 text-sm mb-1">{getGreeting()},</p>
                <h1 className="text-3xl md:text-4xl font-bold text-white mb-2">
                  {currentDriver.name}
                  <span className="ml-3 text-2xl">{getCountryFlag(currentDriver.country)}</span>
                </h1>
                <div className="flex flex-wrap items-center gap-3">
                  <div className="flex items-center gap-1.5 px-3 py-1 rounded-full bg-primary-blue/10 border border-primary-blue/30">
                    <Star className="w-3.5 h-3.5 text-primary-blue" />
                    <span className="text-sm font-semibold text-primary-blue">{rating}</span>
                  </div>
                  <div className="flex items-center gap-1.5 px-3 py-1 rounded-full bg-yellow-400/10 border border-yellow-400/30">
                    <Trophy className="w-3.5 h-3.5 text-yellow-400" />
                    <span className="text-sm font-semibold text-yellow-400">#{globalRank}</span>
                  </div>
                  <span className="text-xs text-gray-500">{totalRaces} races completed</span>
                </div>
              </div>
            </div>

            {/* Quick Actions */}
            <div className="flex flex-wrap gap-3">
              <Link href="/leagues">
                <Button variant="secondary" className="flex items-center gap-2">
                  <Flag className="w-4 h-4" />
                  Browse Leagues
                </Button>
              </Link>
              <Link href="/profile">
                <Button variant="primary" className="flex items-center gap-2">
                  <Activity className="w-4 h-4" />
                  View Profile
                </Button>
              </Link>
            </div>
          </div>

          {/* Quick Stats Row */}
          <div className="grid grid-cols-2 md:grid-cols-4 gap-4 mt-8">
            <StatCard icon={Trophy} value={wins} label="Wins" color="bg-performance-green/20 text-performance-green" />
            <StatCard icon={Medal} value={podiums} label="Podiums" color="bg-warning-amber/20 text-warning-amber" />
            <StatCard icon={Target} value={`${consistency}%`} label="Consistency" color="bg-primary-blue/20 text-primary-blue" />
            <StatCard icon={Users} value={activeLeaguesCount} label="Active Leagues" color="bg-purple-500/20 text-purple-400" />
          </div>
        </div>
      </section>

      {/* Main Content */}
      <section className="max-w-7xl mx-auto px-6 py-8">
        <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
          {/* Left Column - Main Content */}
          <div className="lg:col-span-2 space-y-6">
            {/* Next Race Card */}
            {nextRace && (
              <Card className="relative overflow-hidden bg-gradient-to-br from-iron-gray to-iron-gray/80 border-primary-blue/30">
                <div className="absolute top-0 right-0 w-40 h-40 bg-gradient-to-bl from-primary-blue/20 to-transparent rounded-bl-full" />
                <div className="relative">
                  <div className="flex items-center gap-2 mb-4">
                    <div className="flex items-center gap-2 px-3 py-1 rounded-full bg-primary-blue/20 border border-primary-blue/30">
                      <Play className="w-3.5 h-3.5 text-primary-blue" />
                      <span className="text-xs font-semibold text-primary-blue uppercase tracking-wider">Next Race</span>
                    </div>
                    {nextRace.isMyLeague && (
                      <span className="px-2 py-0.5 rounded-full bg-performance-green/20 text-performance-green text-xs font-medium">
                        Your League
                      </span>
                    )}
                  </div>
                  
                  <div className="flex flex-col md:flex-row md:items-end md:justify-between gap-4">
                    <div>
                      <h2 className="text-2xl font-bold text-white mb-2">{nextRace.track}</h2>
                      <p className="text-gray-400 mb-3">{nextRace.car}</p>
                      <div className="flex flex-wrap items-center gap-4 text-sm">
                        <span className="flex items-center gap-1.5 text-gray-400">
                          <Calendar className="w-4 h-4" />
                          {nextRace.scheduledAt.toLocaleDateString('en-US', {
                            weekday: 'long',
                            month: 'short',
                            day: 'numeric',
                          })}
                        </span>
                        <span className="flex items-center gap-1.5 text-gray-400">
                          <Clock className="w-4 h-4" />
                          {nextRace.scheduledAt.toLocaleTimeString('en-US', {
                            hour: '2-digit',
                            minute: '2-digit',
                          })}
                        </span>
                      </div>
                    </div>
                    
                    <div className="flex flex-col items-end gap-3">
                      <div className="text-right">
                        <p className="text-xs text-gray-500 uppercase tracking-wider mb-1">Starts in</p>
                        <p className="text-3xl font-bold text-primary-blue font-mono">{timeUntil(nextRace.scheduledAt)}</p>
                      </div>
                      <Link href={`/races/${nextRace.id}`}>
                        <Button variant="primary" className="flex items-center gap-2">
                          View Details
                          <ChevronRight className="w-4 h-4" />
                        </Button>
                      </Link>
                    </div>
                  </div>
                </div>
              </Card>
            )}

            {/* League Standings Preview */}
            {leagueStandingsSummaries.length > 0 && (
              <Card>
                <div className="flex items-center justify-between mb-4">
                  <h2 className="text-lg font-semibold text-white flex items-center gap-2">
                    <Award className="w-5 h-5 text-yellow-400" />
                    Your Championship Standings
                  </h2>
                  <Link href="/profile/leagues" className="text-sm text-primary-blue hover:underline flex items-center gap-1">
                    View all <ChevronRight className="w-4 h-4" />
                  </Link>
                </div>
                <div className="space-y-3">
                  {leagueStandingsSummaries.map(({ leagueId, leagueName, position, points, totalDrivers }) => (
                    <LeagueStandingItem
                      key={leagueId}
                      leagueId={leagueId}
                      leagueName={leagueName}
                      position={position}
                      points={points}
                      totalDrivers={totalDrivers}
                    />
                  ))}
                </div>
              </Card>
            )}

            {/* Activity Feed */}
            <Card>
              <div className="flex items-center justify-between mb-4">
                <h2 className="text-lg font-semibold text-white flex items-center gap-2">
                  <Activity className="w-5 h-5 text-cyan-400" />
                  Recent Activity
                </h2>
              </div>
              {feedSummary.items.length > 0 ? (
                <div className="space-y-4">
                  {feedSummary.items.slice(0, 5).map((item) => (
                    <FeedItemRow key={item.id} item={item} />
                  ))}
                </div>
              ) : (
                <div className="text-center py-8">
                  <Activity className="w-12 h-12 text-gray-600 mx-auto mb-3" />
                  <p className="text-gray-400 mb-2">No activity yet</p>
                  <p className="text-sm text-gray-500">Join leagues and add friends to see activity here</p>
                </div>
              )}
            </Card>
          </div>

          {/* Right Column - Sidebar */}
          <div className="space-y-6">
            {/* Upcoming Races */}
            <Card>
              <div className="flex items-center justify-between mb-4">
                <h3 className="text-lg font-semibold text-white flex items-center gap-2">
                  <Calendar className="w-5 h-5 text-red-400" />
                  Upcoming Races
                </h3>
                <Link href="/races" className="text-xs text-primary-blue hover:underline">
                  View all
                </Link>
              </div>
              {upcomingRaces.length > 0 ? (
                <div className="space-y-3">
                  {upcomingRaces.slice(0, 5).map((race) => (
                    <UpcomingRaceItem
                      key={race.id}
                      id={race.id}
                      track={race.track}
                      car={race.car}
                      scheduledAt={race.scheduledAt}
                      isMyLeague={race.isMyLeague}
                    />
                  ))}
                </div>
              ) : (
                <p className="text-gray-500 text-sm text-center py-4">No upcoming races</p>
              )}
            </Card>

            {/* Friends */}
            <Card>
              <div className="flex items-center justify-between mb-4">
                <h3 className="text-lg font-semibold text-white flex items-center gap-2">
                  <Users className="w-5 h-5 text-purple-400" />
                  Friends
                </h3>
                <span className="text-xs text-gray-500">{friends.length} friends</span>
              </div>
              {friends.length > 0 ? (
                <div className="space-y-2">
                  {friends.slice(0, 6).map((friend) => (
                    <FriendItem
                      key={friend.id}
                      id={friend.id}
                      name={friend.name}
                      avatarUrl={friend.avatarUrl}
                      country={friend.country}
                    />
                  ))}
                  {friends.length > 6 && (
                    <Link
                      href="/profile"
                      className="block text-center py-2 text-sm text-primary-blue hover:underline"
                    >
                      +{friends.length - 6} more
                    </Link>
                  )}
                </div>
              ) : (
                <div className="text-center py-6">
                  <UserPlus className="w-10 h-10 text-gray-600 mx-auto mb-2" />
                  <p className="text-sm text-gray-400 mb-2">No friends yet</p>
                  <Link href="/drivers">
                    <Button variant="secondary" className="text-xs">
                      Find Drivers
                    </Button>
                  </Link>
                </div>
              )}
            </Card>
          </div>
        </div>
      </section>
    </main>
  );
}