<?php

namespace Filament\Pages\Auth;

use DanHarrin\LivewireRateLimiting\Exceptions\TooManyRequestsException;
use DanHarrin\LivewireRateLimiting\WithRateLimiting;
use Exception;
use Filament\Actions\Action;
use Filament\Actions\ActionGroup;
use Filament\Events\Auth\Registered;
use Filament\Facades\Filament;
use Filament\Forms\Components\Component;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Form;
use Filament\Http\Responses\Auth\Contracts\RegistrationResponse;
use Filament\Notifications\Auth\VerifyEmail;
use Filament\Notifications\Notification;
use Filament\Pages\Concerns\CanUseDatabaseTransactions;
use Filament\Pages\Concerns\InteractsWithFormActions;
use Filament\Pages\SimplePage;
use Illuminate\Auth\EloquentUserProvider;
use Illuminate\Auth\SessionGuard;
use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Contracts\Support\Htmlable;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\Hash;
use Illuminate\Validation\Rules\Password;

/**
 * @property Form $form
 */
class Register extends SimplePage
{
    use CanUseDatabaseTransactions;
    use InteractsWithFormActions;
    use WithRateLimiting;

    /**
     * @var view-string
     */
    protected static string $view = 'filament-panels::pages.auth.register';

    /**
     * @var array<string, mixed> | null
     */
    public ?array $data = [];

    protected string $userModel;

    public function mount(): void
    {
        if (Filament::auth()->check()) {
            redirect()->intended(Filament::getUrl());
        }

        $this->callHook('beforeFill');

        $this->form->fill();

        $this->callHook('afterFill');
    }

    public function register(): ?RegistrationResponse
    {
        try {
            $this->rateLimit(2);
        } catch (TooManyRequestsException $exception) {
            $this->getRateLimitedNotification($exception)?->send();

            return null;
        }

        $user = $this->wrapInDatabaseTransaction(function (): Model {
            $this->callHook('beforeValidate');

            $data = $this->form->getState();

            $this->callHook('afterValidate');

            $data = $this->mutateFormDataBeforeRegister($data);

            $this->callHook('beforeRegister');

            $user = $this->handleRegistration($data);

            $this->form->model($user)->saveRelationships();

            $this->callHook('afterRegister');

            return $user;
        });

        event(new Registered($user));

        $this->sendEmailVerificationNotification($user);

        Filament::auth()->login($user);

        session()->regenerate();

        return app(RegistrationResponse::class);
    }

    protected function getRateLimitedNotification(TooManyRequestsException $exception): ?Notification
    {
        return Notification::make()
            ->title(__('filament-panels::pages/auth/register.notifications.throttled.title', [
                'seconds' => $exception->secondsUntilAvailable,
                'minutes' => $exception->minutesUntilAvailable,
            ]))
            ->body(array_key_exists('body', __('filament-panels::pages/auth/register.notifications.throttled') ?: []) ? __('filament-panels::pages/auth/register.notifications.throttled.body', [
                'seconds' => $exception->secondsUntilAvailable,
                'minutes' => $exception->minutesUntilAvailable,
            ]) : null)
            ->danger();
    }

    /**
     * @param  array<string, mixed>  $data
     */
    protected function handleRegistration(array $data): Model
    {
        return $this->getUserModel()::create($data);
    }

    protected function sendEmailVerificationNotification(Model $user): void
    {
        if (! $user instanceof MustVerifyEmail) {
            return;
        }

        if ($user->hasVerifiedEmail()) {
            return;
        }

        if (! method_exists($user, 'notify')) {
            $userClass = $user::class;

            throw new Exception("Model [{$userClass}] does not have a [notify()] method.");
        }

        $notification = app(VerifyEmail::class);
        $notification->url = Filament::getVerifyEmailUrl($user);

        $user->notify($notification);
    }

    public function form(Form $form): Form
    {
        return $form;
    }

    /**
     * @return array<int | string, string | Form>
     */
    protected function getForms(): array
    {
        return [
            'form' => $this->form(
                $this->makeForm()
                    ->schema([
                        $this->getNameFormComponent(),
                        $this->getEmailFormComponent(),
                        $this->getPasswordFormComponent(),
                        $this->getPasswordConfirmationFormComponent(),
                    ])
                    ->statePath('data'),
            ),
        ];
    }

    protected function getNameFormComponent(): Component
    {
        return TextInput::make('name')
            ->label(__('filament-panels::pages/auth/register.form.name.label'))
            ->required()
            ->maxLength(255)
            ->autofocus();
    }

    protected function getEmailFormComponent(): Component
    {
        return TextInput::make('email')
            ->label(__('filament-panels::pages/auth/register.form.email.label'))
            ->email()
            ->required()
            ->maxLength(255)
            ->unique($this->getUserModel());
    }

    protected function getPasswordFormComponent(): Component
    {
        return TextInput::make('password')
            ->label(__('filament-panels::pages/auth/register.form.password.label'))
            ->password()
            ->revealable(filament()->arePasswordsRevealable())
            ->required()
            ->rule(Password::default())
            ->dehydrateStateUsing(fn ($state) => Hash::make($state))
            ->same('passwordConfirmation')
            ->validationAttribute(__('filament-panels::pages/auth/register.form.password.validation_attribute'));
    }

    protected function getPasswordConfirmationFormComponent(): Component
    {
        return TextInput::make('passwordConfirmation')
            ->label(__('filament-panels::pages/auth/register.form.password_confirmation.label'))
            ->password()
            ->revealable(filament()->arePasswordsRevealable())
            ->required()
            ->dehydrated(false);
    }

    public function loginAction(): Action
    {
        return Action::make('login')
            ->link()
            ->label(__('filament-panels::pages/auth/register.actions.login.label'))
            ->url(filament()->getLoginUrl());
    }

    protected function getUserModel(): string
    {
        if (isset($this->userModel)) {
            return $this->userModel;
        }

        /** @var SessionGuard $authGuard */
        $authGuard = Filament::auth();

        /** @var EloquentUserProvider $provider */
        $provider = $authGuard->getProvider();

        return $this->userModel = $provider->getModel();
    }

    public function getTitle(): string | Htmlable
    {
        return __('filament-panels::pages/auth/register.title');
    }

    public function getHeading(): string | Htmlable
    {
        return __('filament-panels::pages/auth/register.heading');
    }

    /**
     * @return array<Action | ActionGroup>
     */
    protected function getFormActions(): array
    {
        return [
            $this->getRegisterFormAction(),
        ];
    }

    public function getRegisterFormAction(): Action
    {
        return Action::make('register')
            ->label(__('filament-panels::pages/auth/register.form.actions.register.label'))
            ->submit('register');
    }

    protected function hasFullWidthFormActions(): bool
    {
        return true;
    }

    /**
     * @param  array<string, mixed>  $data
     * @return array<string, mixed>
     */
    protected function mutateFormDataBeforeRegister(array $data): array
    {
        return $data;
    }
}