<?php

namespace App\Http\Controllers\Admin;

use App\Enums\CateringStatus;
use App\Enums\EventStatus;
use App\Enums\EventType;
use App\Enums\ParticipantStatus;
use App\Enums\PlayerPosition;
use App\Http\Controllers\Controller;
use App\Models\Event;
use App\Models\EventCatering;
use App\Models\EventParticipant;
use App\Models\EventPlayerStat;
use App\Models\EventTimekeeper;
use App\Models\Player;
use App\Models\Setting;
use App\Models\Team;
use App\Models\User;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\View\View;

class StatisticsController extends Controller
{
    public function index(Request $request): View
    {
        if (!Setting::isFeatureVisibleFor('statistics', auth()->user())) {
            abort(403);
        }

        $request->validate([
            'team_id' => ['nullable', 'integer', 'exists:teams,id'],
            'from' => ['nullable', 'date'],
            'to' => ['nullable', 'date'],
        ]);

        $query = Event::with(['team'])
            ->withCount([
                'participants as players_yes_count' => fn ($q) => $q->where('status', 'yes'),
                'caterings as caterings_yes_count' => fn ($q) => $q->where('status', 'yes'),
                'timekeepers as timekeepers_yes_count' => fn ($q) => $q->where('status', 'yes'),
            ])
            ->whereIn('type', [EventType::HomeGame, EventType::AwayGame])
            ->where('status', EventStatus::Published);

        if ($request->filled('team_id')) {
            $query->where('team_id', $request->team_id);
        }

        if ($request->filled('from')) {
            $query->where('start_at', '>=', $request->from);
        }

        if ($request->filled('to')) {
            $query->where('start_at', '<=', $request->to . ' 23:59:59');
        }

        $games = $query->orderByDesc('start_at')->get();

        // Statistiken berechnen
        $gamesWithScore = $games->filter(fn ($g) => $g->score_home !== null && $g->score_away !== null);

        $wins = 0;
        $losses = 0;
        $draws = 0;

        foreach ($gamesWithScore as $game) {
            if ($game->type === EventType::HomeGame) {
                if ($game->score_home > $game->score_away) {
                    $wins++;
                } elseif ($game->score_home < $game->score_away) {
                    $losses++;
                } else {
                    $draws++;
                }
            } else {
                if ($game->score_away > $game->score_home) {
                    $wins++;
                } elseif ($game->score_away < $game->score_home) {
                    $losses++;
                } else {
                    $draws++;
                }
            }
        }

        $totalWithScore = $gamesWithScore->count();
        $winRate = $totalWithScore > 0 ? round(($wins / $totalWithScore) * 100) : 0;

        // Chart-Daten
        $chartWinLoss = [
            'labels' => [__('admin.wins'), __('admin.losses'), __('admin.draws')],
            'data' => [$wins, $losses, $draws],
            'colors' => ['#22c55e', '#ef4444', '#9ca3af'],
        ];

        // Spieler-Teilnahme pro Spiel (nur die letzten 15 Spiele)
        $recentGames = $games->take(15)->reverse()->values();
        $chartPlayerParticipation = [
            'labels' => $recentGames->map(fn ($g) => $g->start_at->format('d.m.'))->toArray(),
            'data' => $recentGames->map(fn ($g) => $g->players_yes_count)->toArray(),
        ];

        // Eltern-Engagement (Catering + Zeitnehmer)
        $chartParentInvolvement = [
            'labels' => $recentGames->map(fn ($g) => $g->start_at->format('d.m.'))->toArray(),
            'catering' => $recentGames->map(fn ($g) => $g->caterings_yes_count)->toArray(),
            'timekeepers' => $recentGames->map(fn ($g) => $g->timekeepers_yes_count)->toArray(),
        ];

        $teams = Team::where('is_active', true)->orderBy('name')->get();

        // ── Spieler-Rangliste ──────────────────────────────────
        $gameIds = $games->pluck('id');
        $totalGames = $games->count();

        // Tore pro Spieler aus event_player_stats
        $goalsByPlayer = EventPlayerStat::whereIn('event_id', $gameIds)
            ->select('player_id', DB::raw('COALESCE(SUM(goals), 0) as total_goals'))
            ->groupBy('player_id')
            ->pluck('total_goals', 'player_id');

        // Häufigste Position pro Spieler aus event_player_stats
        $positionCounts = EventPlayerStat::whereIn('event_id', $gameIds)
            ->whereNotNull('position')
            ->select('player_id', 'position', DB::raw('COUNT(*) as cnt'))
            ->groupBy('player_id', 'position')
            ->get()
            ->groupBy('player_id')
            ->map(fn ($g) => $g->sortByDesc('cnt')->first()->position);

        // Aggregierte Performance-Daten pro Spieler
        $playerAggStats = EventPlayerStat::whereIn('event_id', $gameIds)
            ->select(
                'player_id',
                DB::raw('COALESCE(SUM(goals), 0) as total_goals_agg'),
                DB::raw('COALESCE(SUM(shots), 0) as total_shots_agg'),
                DB::raw('COALESCE(SUM(goalkeeper_saves), 0) as total_gk_saves'),
                DB::raw('COALESCE(SUM(goalkeeper_shots), 0) as total_gk_shots')
            )
            ->groupBy('player_id')
            ->get()
            ->keyBy('player_id');

        $playerRanking = collect();
        if ($totalGames > 0) {
            $playerRanking = EventParticipant::select('player_id', DB::raw('COUNT(*) as total_assigned'), DB::raw('SUM(CASE WHEN status = \'yes\' THEN 1 ELSE 0 END) as games_played'))
                ->whereIn('event_id', $gameIds)
                ->whereNotNull('player_id')
                ->groupBy('player_id')
                ->get()
                ->map(function ($row) use ($totalGames, $goalsByPlayer, $positionCounts, $playerAggStats) {
                    $player = Player::withTrashed()->find($row->player_id);
                    if (!$player) {
                        return null;
                    }

                    // Primäre Position: häufigste aus Stats, Fallback auf player.position
                    $primaryPosition = $positionCounts->get($row->player_id) ?? $player->position;
                    $isPrimaryGk = $primaryPosition?->isGoalkeeper() ?? false;

                    // Performance-Rate + Ampelfarbe berechnen
                    $agg = $playerAggStats->get($row->player_id);
                    $performanceRate = null;
                    $performanceColor = 'gray';

                    if ($agg) {
                        if ($isPrimaryGk) {
                            // Torwart: Fangquote
                            if ($agg->total_gk_shots > 0) {
                                $performanceRate = round(($agg->total_gk_saves / $agg->total_gk_shots) * 100, 1);
                                $performanceColor = $performanceRate >= 40 ? 'green' : ($performanceRate >= 25 ? 'yellow' : 'red');
                            }
                        } else {
                            // Feldspieler: Trefferquote
                            if ($agg->total_shots_agg > 0) {
                                $performanceRate = round(($agg->total_goals_agg / $agg->total_shots_agg) * 100, 1);
                                $performanceColor = $performanceRate >= 50 ? 'green' : ($performanceRate >= 30 ? 'yellow' : 'red');
                            }
                        }
                    }

                    return (object) [
                        'player' => $player,
                        'games_played' => (int) $row->games_played,
                        'total_assigned' => (int) $row->total_assigned,
                        'total_games' => $totalGames,
                        'total_goals' => (int) ($goalsByPlayer[$row->player_id] ?? 0),
                        'rate' => $row->total_assigned > 0
                            ? round(($row->games_played / $row->total_assigned) * 100)
                            : 0,
                        'primary_position' => $primaryPosition,
                        'is_primary_gk' => $isPrimaryGk,
                        'performance_rate' => $performanceRate,
                        'performance_color' => $performanceColor,
                    ];
                })
                ->filter()
                ->sortBy([
                    // Torwarte zuerst, dann Feldspieler
                    ['is_primary_gk', 'desc'],
                    ['games_played', 'desc'],
                ])
                ->values();
        }

        // Spielfeld-Aufstellung: Bester Spieler pro Position (meiste Spiele)
        $courtPlayers = $playerRanking
            ->filter(fn ($e) => $e->primary_position !== null)
            ->groupBy(fn ($e) => $e->primary_position->value)
            ->map(fn ($group) => $group->sortByDesc('games_played')->first());

        // ── Eltern-Engagement-Rangliste ────────────────────────
        // Alle publizierten Events (nicht nur Spiele) mit gleichen Team/Datum-Filtern
        $allEventsQuery = Event::where('status', EventStatus::Published);

        if ($request->filled('team_id')) {
            $allEventsQuery->where('team_id', $request->team_id);
        }
        if ($request->filled('from')) {
            $allEventsQuery->where('start_at', '>=', $request->from);
        }
        if ($request->filled('to')) {
            $allEventsQuery->where('start_at', '<=', $request->to . ' 23:59:59');
        }

        $allEventIds = $allEventsQuery->pluck('id');

        // Catering-Events (nur Typen die Catering haben)
        $cateringEventIds = $allEventsQuery->clone()
            ->whereNotIn('type', [EventType::AwayGame, EventType::Meeting])
            ->pluck('id');

        // Zeitnehmer-Events (identisch wie Catering)
        $timekeeperEventIds = $cateringEventIds;

        $cateringCounts = EventCatering::select('user_id', DB::raw('COUNT(*) as count'))
            ->whereIn('event_id', $cateringEventIds)
            ->where('status', CateringStatus::Yes)
            ->groupBy('user_id')
            ->pluck('count', 'user_id');

        $timekeeperCounts = EventTimekeeper::select('user_id', DB::raw('COUNT(*) as count'))
            ->whereIn('event_id', $timekeeperEventIds)
            ->where('status', CateringStatus::Yes)
            ->groupBy('user_id')
            ->pluck('count', 'user_id');

        $parentUserIds = $cateringCounts->keys()->merge($timekeeperCounts->keys())->unique();

        $parentRanking = User::withTrashed()
            ->whereIn('id', $parentUserIds)
            ->get()
            ->map(function ($user) use ($cateringCounts, $timekeeperCounts) {
                $catering = $cateringCounts->get($user->id, 0);
                $timekeeper = $timekeeperCounts->get($user->id, 0);

                return (object) [
                    'user' => $user,
                    'catering_count' => $catering,
                    'timekeeper_count' => $timekeeper,
                    'total' => $catering + $timekeeper,
                ];
            })
            ->sortByDesc('total')
            ->values();

        $totalCateringEvents = $cateringEventIds->count();
        $totalTimekeeperEvents = $timekeeperEventIds->count();

        return view('admin.statistics.index', compact(
            'games', 'teams', 'wins', 'losses', 'draws', 'winRate', 'totalWithScore',
            'chartWinLoss', 'chartPlayerParticipation', 'chartParentInvolvement',
            'playerRanking', 'totalGames', 'courtPlayers',
            'parentRanking', 'totalCateringEvents', 'totalTimekeeperEvents'
        ));
    }

    public function playerDetail(Player $player): JsonResponse
    {
        if (!Setting::isFeatureVisibleFor('statistics', auth()->user())) {
            abort(403);
        }

        $stats = EventPlayerStat::where('player_id', $player->id)
            ->with(['event' => fn ($q) => $q->select('id', 'title', 'opponent', 'score_home', 'score_away', 'type', 'start_at', 'team_id')])
            ->whereHas('event', fn ($q) => $q->where('status', EventStatus::Published))
            ->get()
            ->sortByDesc(fn ($s) => $s->event->start_at)
            ->values();

        $totalGoals = $stats->sum('goals');
        $totalShots = $stats->sum('shots');
        $gkGames = $stats->where('is_goalkeeper', true);
        $totalGkSaves = $gkGames->sum('goalkeeper_saves');
        $totalGkShots = $gkGames->sum('goalkeeper_shots');

        return response()->json([
            'player' => [
                'name' => $player->full_name,
                'avatar' => $player->getAvatarUrl(),
                'initials' => $player->getInitials(),
                'position' => $player->position?->label(),
            ],
            'summary' => [
                'total_goals' => $totalGoals,
                'total_shots' => $totalShots,
                'hit_rate' => $totalShots > 0 ? round(($totalGoals / $totalShots) * 100, 1) : null,
                'gk_appearances' => $gkGames->count(),
                'total_saves' => $totalGkSaves,
                'total_gk_shots' => $totalGkShots,
                'save_rate' => $totalGkShots > 0 ? round(($totalGkSaves / $totalGkShots) * 100, 1) : null,
            ],
            'games' => $stats->map(fn ($s) => [
                'date' => $s->event->start_at->format('d.m.Y'),
                'opponent' => $s->event->opponent ?? '–',
                'score' => $s->event->score_home !== null ? $s->event->score_home . ':' . ($s->event->score_away ?? '?') : '–',
                'position' => $s->position?->shortLabel(),
                'goals' => $s->goals,
                'shots' => $s->shots,
                'is_goalkeeper' => $s->is_goalkeeper,
                'goalkeeper_saves' => $s->goalkeeper_saves,
                'goalkeeper_shots' => $s->goalkeeper_shots,
                'note' => $s->note,
            ])->toArray(),
        ]);
    }
}