<?php

namespace App\Http\Controllers\User;

use App\Http\Controllers\Admin\IncentiveController as AdminIncentiveController;
use App\Http\Controllers\Controller;
use App\Models\Incentive;
use App\Models\IncentiveParticipant;
use App\Models\UserAbo;
use App\Services\Incentive\IncentivePointsLogRepairService;
use App\Services\Incentive\IncentiveTracker;
use App\User;
use Carbon\Carbon;
use Illuminate\Support\Facades\Auth;
use Request;

class IncentiveController extends Controller
{
    /**
     * Anzahl Plaetze in der User-Live-Rangliste (Gewinner-Highlight bleibt ueber max_winners, typ. Top 20).
     */
    public const USER_RANKING_DISPLAY_LIMIT = 30;

    public function __construct()
    {
        $this->middleware('active.account');
    }

    public function teaser($slug)
    {
        $incentive = Incentive::where('slug', $slug)
            ->where('status', '!=', 0)
            ->firstOrFail();

        $user = Auth::user();
        $participant = IncentiveParticipant::where('incentive_id', $incentive->id)
            ->where('user_id', $user->id)
            ->first();

        $galleryImages = $this->collectGalleryImages($incentive);

        return view('user.incentive.teaser', [
            'incentive' => $incentive,
            'participant' => $participant,
            'galleryImages' => $galleryImages,
        ]);
    }

    public function show($slug)
    {
        $incentive = Incentive::where('slug', $slug)
            ->where('status', '!=', 0) // not draft
            ->firstOrFail();

        $user = Auth::user();
        $participant = IncentiveParticipant::where('incentive_id', $incentive->id)
            ->where('user_id', $user->id)
            ->first();

        $ranking = IncentiveParticipant::where('incentive_id', $incentive->id)
            ->withRankingActivity()
            ->with('user', 'user.account')
            ->orderByIncentiveLeaderboard()
            ->paginate(100);

        $participateHasTrackableAbos = false;
        if (! $participant?->accepted_terms_at) {
            $participateHasTrackableAbos = $this->userHasTrackableAbosForIncentive($user, $incentive);
        }

        return view('user.incentive.show', [
            'incentive' => $incentive,
            'participant' => $participant,
            'hasConfirmedParticipation' => $participant && $participant->accepted_terms_at !== null,
            'ranking' => $ranking,
            'participateHasTrackableAbos' => $participateHasTrackableAbos,
            'isVipView' => $user->isVIP(),
        ]);
    }

    public function participate($slug)
    {
        $incentive = Incentive::where('slug', $slug)
            ->active()
            ->firstOrFail();

        if (! Request::has('accept_terms')) {
            \Session()->flash('alert-error', __('incentive.terms_required'));

            return redirect(route('user_incentive_show', [$slug]));
        }

        $user = Auth::user();

        $participant = IncentiveParticipant::firstOrCreate(
            [
                'incentive_id' => $incentive->id,
                'user_id' => $user->id,
            ],
            [
                'accepted_terms_at' => null,
            ]
        );

        if ($participant->accepted_terms_at !== null) {
            \Session()->flash('alert-info', __('incentive.already_participating'));

            return redirect(route('user_incentive_show', [$slug]));
        }

        $participant->accepted_terms_at = Carbon::now();
        $participant->save();

        $repair = app(IncentivePointsLogRepairService::class);
        $repair->syncMissingTrackingAbos($participant);
        $repair->syncMissingSalesVolumeLogs($participant);
        $participant->refresh()->recalculateFromTrackingTables()->save();
        IncentiveTracker::updateRanking($incentive);

        \Session()->flash('alert-success', __('incentive.participation_confirmed'));

        return redirect(route('user_incentive_show', [$slug]));
    }

    public function details($slug)
    {
        $incentive = Incentive::where('slug', $slug)
            ->where('status', '!=', 0)
            ->firstOrFail();

        $user = Auth::user();
        $participant = IncentiveParticipant::with('incentive', 'user', 'user.account')
            ->where('incentive_id', $incentive->id)
            ->where('user_id', $user->id)
            ->firstOrFail();

        if ($participant->accepted_terms_at === null) {
            \Session()->flash('alert-info', __('incentive.details_requires_confirmation'));

            return redirect(route('user_incentive_show', [$slug]));
        }

        $data = AdminIncentiveController::buildParticipantDetailData($participant);

        return view('user.incentive.details', $data);
    }

    /**
     * Sammelt alle verfuegbaren Galerie-Bilder aus public/img/incentive/
     * (ohne das Hauptbild, das bereits als Hero verwendet wird).
     *
     * @return list<string>
     */
    private function collectGalleryImages(Incentive $incentive): array
    {
        $dir = public_path('img/incentive');

        if (! is_dir($dir)) {
            return [];
        }

        $files = glob($dir.'/*.{jpg,jpeg,png,webp}', GLOB_BRACE) ?: [];

        $images = [];
        foreach ($files as $file) {
            $basename = basename($file);
            $images[] = 'img/incentive/'.$basename;
        }
        sort($images);

        return $images;
    }

    /**
     * Hinweis auf der Teilnehmen-Karte: Es gibt bereits ein Eigenabo oder ein Kundenabo im Qualifikationszeitraum.
     */
    private function userHasTrackableAbosForIncentive(User $user, Incentive $incentive): bool
    {
        $qualEnd = $incentive->qualification_end->copy()->endOfDay();

        $hasOwnActiveAbo = UserAbo::query()
            ->where('user_id', $user->id)
            ->where('is_for', 'me')
            ->where('status', 2)
            ->exists();

        $hasCustomerAboInQualification = UserAbo::query()
            ->where('member_id', $user->id)
            ->where('is_for', 'ot')
            ->where('status', 2)
            ->whereBetween('created_at', [
                $incentive->qualification_start,
                $qualEnd,
            ])
            ->exists();

        return $hasOwnActiveAbo || $hasCustomerAboInQualification;
    }
}