<?php

declare(strict_types=1);

namespace App\Http\Controllers\Fo;

use App\Http\Controllers\Controller;
use App\Http\Requests\Fo\Customers\CreateAccountRequest;
use App\Http\Requests\Fo\ParticipateRequest;
use App\Lib\Discount as LibDiscount;
use App\Mail\Won\PrizeWonAdminMail;
use App\Models\Code;
use App\Models\Customer;
use App\Models\InstantWin;
use App\Models\Participation;
use App\Models\Product;
use App\Models\Settings;
use App\Notifications\Customer\HasWonDiscount;
use App\Notifications\Customer\HasWonInstantWin;
use App\Repositories\Fo\CrmRepository;
use Exception;
use Illuminate\Contracts\View\View;
use Illuminate\Http\Exceptions\HttpResponseException;
use Illuminate\Http\Request;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Gate;
use Illuminate\Support\Facades\Mail;
use Illuminate\Support\Facades\Session;
use Illuminate\Support\Facades\Validator;
use Illuminate\Validation\ValidationException;
use LDC\MESBR\MesBr;
use RuntimeException;

class ParticipateController extends Controller
{
    private readonly CrmRepository $crmRepository;

    /**
     * ParticipateController
     */
    public function __construct()
    {
        $this->crmRepository = new CrmRepository();
        $this->middleware(function (Request $request, callable $next) {
            $this->authorize('fo.gameEnabled');
            $this->assertUserHasEnoughInfoToUseMesBr();

            return $next($request);
        });
    }

    /**
     * Display participation form
     */
    public function participate(): View
    {
        if (! Gate::check('participate', Participation::class)) {
            /** @var view-string $view */
            $view = 'theme::pages.participation.participation-exhausted';
            return view($view);
        }

        /** @var view-string $view */
        $view = 'theme::pages.participation.participate';

        return view($view);
    }

    /**
     * Participate Method
     */
    public function participateSubmit(ParticipateRequest $request): View
    {
        return DB::transaction(function () use ($request) {
            // ! On verrouille le ou les instants gagnant
            /** @var InstantWin|null */
            $instantWin = InstantWin::query()->lockForUpdate()
                ->where('available_at', '<', now())
                ->whereDoesntHave('participation')
                ->get()->sortBy('available_at')->first();

            /** @var Settings */
            $settings = resolve(Settings::class);

            /** @var Customer */
            $customer = auth('frontend')->user();

            /** @var Code|null */
            $code = $request->post('unique_code');
            /** @var Product|null */
            $product = $request->post('product');

            // * Make new participation
            $participation = Participation::makeNew(
                resolve('clientIp'),
                $customer,
                $code,
                $product
            );

            // * Si l'utilisateur actuel à déjà gagné un gros lot, pas d'instant gagnant.
            // ? As-t-on un instant gagnant ?
            if (Participation::customerAlreadyHasAnInstantWin($customer) || ! $instantWin) {
                // * --- DISCOUNT WIN ---
                // ? Les BR sont activés ?
                if (! $settings->discounts_activated) {
                    // * On enregistre la participation du joueur.
                    $participation->save();

                    /** @var view-string $view Pas de coupons disponibles, le joueur à perdu. */
                    $view = 'theme::pages.participation.loose';

                    return view($view);
                }

                // * Le joueur à gagné un coupon.
                /** @var \App\Lib\Discount Coupon aléatoire en fonction du ratio de chaque coupon */
                $discount = Arr::get(
                    $settings->web_coupons,
                    $this->getRandomWeightedElementIndex($settings->web_coupons)
                );

                $this->setDiscountAsWon($customer, $discount);

                // * Le joueur à remporté un coupon
                $participation->discount_code = (string) $discount->web_coupon_identifiant;
                // * On enregistre la participation du joueur.
                $participation->save();

                $crmCustomer = $this->crmRepository->fetchCrmCustomer($customer);

                $customer->notify(new HasWonDiscount(
                    $discount,
                    $crmCustomer->firstname
                ));

                /** @var view-string $view */
                $view = 'theme::pages.participation.won';

                return view($view, ['discount' => $discount]);
            } // end if

            // * --- INSTANT WIN ---
            // * On enregistre la participation du joueur.
            $participation->save();
            // * Le joueur à remporté un instant gagnant
            $instantWin->participation()->associate($participation);
            $instantWin->save();

            $crmCustomer = $this->crmRepository->fetchCrmCustomer($customer);

            // * Notify customer for his win
            $customer->notify(new HasWonInstantWin(
                $instantWin->prize,
                $crmCustomer->firstname
            ));

            // * Dispatch notification to mail list
            Mail::to($settings->notification_emails)->send(new PrizeWonAdminMail(
                $settings->name,
                $participation->created_at,
                $instantWin->prize->label,
                $crmCustomer,
                $code?->code_unique,
                $product?->ean_code
            ));

            /** @var view-string $view */
            $view = 'theme::pages.participation.won';
            return view($view, [
                'prizeModel'         => $instantWin->prize,
                'participationModel' => $participation,
                'crmCustomer'        => $crmCustomer,
            ]);
        });
    }

    // * --- PRIVATE METHODS ---
    /**
     * Try Call CRM + MesBr to setup discount
     *
     * @throws HttpResponseException If Any error occurs.
     *
     * @phpcs:disable Generic.Metrics.CyclomaticComplexity
     */
    private function setDiscountAsWon(Customer $customer, LibDiscount $discount): void
    {
        // phpcs:enable
        // * Phase - 1 Recupération des informations CRM
        /** @var \LDC\LDCCRM\Models\Customer */
        $crmUser = $this->crmRepository->fetchCrmCustomer($customer);

        // * Phase - 2 Mise à jour du coupon dans MesBr
        try {
            /** @var Settings */
            $settings = resolve(Settings::class);

            /** @var MesBr */
            $mesBr = resolve('mesBrAPI');

            // * MaJ Customer
            /** @var string */
            $crm_customer_hashcode = retry(3, function () use ($mesBr, $crmUser) {
                /**
                 * Parce que MesBr n'est pas fiable il faut retenter pour avoir
                 * l'id client, des fois cet id sera dans hashcode...
                 *
                 * Id est necessaire pour update panier..
                 */
                /** @var object|null $result */
                $result = $mesBr->updateCustomer($crmUser->hashcode, $crmUser->email, $crmUser->country->label());
                if ($result?->status !== 'OK') {
                    throw new RuntimeException(
                        \sprintf(
                            'MESBR : Une erreur est survenue. Code : %s Message : %s',
                            $result->code    ?? 'Undefined',
                            $result->message ?? 'Undefined'
                        )
                    );
                }
                /** @var object|null $crm_customer */
                $crm_customer = $result->customer ?? null;
                throw_if(
                    empty($crm_customer->hashcode),
                    RuntimeException::class,
                    'MESBR : Une erreur est survenue. Update Customer n\'as pas retourné le customer hashcode',
                );

                return $crm_customer->hashcode;
            }, 100);

            // * Maj Panier
            $result = $mesBr->updateBasket(
                $crmUser,
                strval($discount->web_coupon_identifiant)
            );

            if (Arr::get($result, 'status') === 'OK') {
                // * La réponse est conforme ?
                $needed_fields = ['ref'];
                if (! Arr::has($result, $needed_fields)) {
                    throw new RuntimeException(sprintf(
                        'MESBR : Il manques des champs dans la réponse, attendu => %s, donné => %s',
                        json_encode($needed_fields),
                        json_encode($result),
                    ));
                }

                // * Tout est OK
                return;
            }

            throw new RuntimeException(
                \sprintf(
                    'MESBR : Une erreur est survenue. Code : %s Message : %s',
                    $result['code']    ?? 'Undefined',
                    $result['message'] ?? 'Undefined'
                )
            );
        } catch (RuntimeException $e) {
            report($e);
            // * Retenter ?
            back()->with('error', trans('front.messages.unexpected_error_try_later'))->throwResponse();
        } // end try
    }

    /**
     * Assert that user has enough info filled on his profile to win a Discount
     * Or redirect him to the fill form
     * ! Also validates its birth date (because beeing an adult is required to participate)
     *
     * @throws HttpResponseException If customer data doest not validate
     *                               or and error occurs.
     */
    private function assertUserHasEnoughInfoToUseMesBr(): void
    {

        // * Valider que le client dispose des donnés requises pour MesBr
        try {
            /** @var Customer */
            $authUser    = auth('frontend')->user();
            $crmCustomer = $this->crmRepository->fetchCrmCustomer($authUser);

            // * On valide les données selon les critères du site
            $rules = collect(new CreateAccountRequest()->rules());
            Validator::make(
                [
                    'birth_date'  => $crmCustomer->birth_date,
                    'address'     => $crmCustomer->address,
                    'postal_code' => $crmCustomer->postcode,
                    'country'     => $crmCustomer->country->value,
                    'city'        => $crmCustomer->city,
                ],
                [
                    'birth_date'  => $rules->get('birth_date'),
                    'address'     => $rules->get('address'),
                    'postal_code' => $rules->get('postal_code'),
                    'country'     => $rules->get('country'),
                    'city'        => $rules->get('city'),
                ]
            )->validate();
            Session::remove('needCrmInfoUpdate');
        } catch (ValidationException) {
            response()->redirectToRoute('fo.profil.verify')
                ->with('warning', trans(
                    'front.messages.profile_incomplete_cannot_play'
                ))->throwResponse();
        } catch (Exception $e) {
            report($e);
            // * Retenter ?
            response()->redirectToRoute('fo.homepage')
                ->with('error', trans('front.messages.unexpected_error_try_later'))
                ->throwResponse();
        } // end try
    }

    // * --- END PRIVATE METHODS ---
}