<?php

declare(strict_types=1);

namespace App\Http\Controllers\Community;

use App\Http\Controllers\Controller;
use App\Models\User;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\View\View;

class RadioLeaderboardController extends Controller
{
    public function __invoke(Request $request): View
    {
        $period = $request->get('period', 'all');

        $users = match ($period) {
            'weekly' => $this->getWeeklyLeaderboard(),
            'monthly' => $this->getMonthlyLeaderboard(),
            default => $this->getAllTimeLeaderboard(),
        };

        // Extract top 3 from already-fetched data
        $topUserData = array_slice($users, 0, 3);
        $topUserIds = array_column($topUserData, 'id');
        $topUsers = User::whereIn('id', $topUserIds)
            ->get()
            ->keyBy('id');

        return view('community.radio.leaderboard', ['users' => $users, 'topUsers' => $topUsers, 'period' => $period]);
    }

    private function getAllTimeLeaderboard(): array
    {
        return User::where('radio_points', '>', 0)
            ->orderBy('radio_points', 'desc')
            ->limit(100)
            ->get()
            ->map(fn ($user, $index) => [
                'rank' => $index + 1,
                'id' => $user->id,
                'username' => $user->username,
                'avatar' => $user->avatar ?? null,
                'points' => $user->radio_points,
            ])
            ->toArray();
    }

    private function getWeeklyLeaderboard(): array
    {
        return $this->getPointsLeaderboard(now()->subWeek());
    }

    private function getMonthlyLeaderboard(): array
    {
        return $this->getPointsLeaderboard(now()->subMonth());
    }

    private function getPointsLeaderboard(Carbon $since): array
    {
        $points = DB::table('radio_listener_points')
            ->where('earned_at', '>=', $since)
            ->select('user_id', DB::raw('SUM(points) as total_points'))
            ->groupBy('user_id')
            ->orderBy('total_points', 'desc')
            ->limit(100)
            ->get();

        $userIds = $points->pluck('user_id')->toArray();
        $users = User::whereIn('id', $userIds)->get()->keyBy('id');

        return $points->map(function ($item, $index) use ($users) {
            $user = $users->get($item->user_id);

            return [
                'rank' => $index + 1,
                'id' => $item->user_id,
                'username' => $user?->username ?? 'Onbekend',
                'avatar' => $user?->avatar ?? null,
                'points' => (int) $item->total_points,
            ];
        })->toArray();
    }
}