<?php

namespace App\Providers;

use App\Events\NotificationCreated;
use App\Models\ApiClient;
use App\Models\User;
use App\Notifications\TicketNotification;
use App\Support\Settings;
use Illuminate\Cache\RateLimiting\Limit;
use Illuminate\Database\Eloquent\Relations\Relation;
use Illuminate\Http\Request;
use Illuminate\Notifications\Events\NotificationSent;
use Illuminate\Support\Facades\Config;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Facades\RateLimiter;
use Illuminate\Support\Facades\Schema;
use Illuminate\Support\ServiceProvider;
use LdapRecord\Connection;
use LdapRecord\Container;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     */
    public function register(): void
    {
        //
    }

    /**
     * Bootstrap any application services.
     */
    public function boot(): void
    {
        $this->applyLdapSettingsOverride();
        $this->applyMailSettingsOverride();
        $this->applySessionSettingsOverride();
        $this->applyTimezoneSettingsOverride();
        $this->configureApiRateLimiting();
        $this->broadcastBellNotifications();

        // 'user' backs the polymorphic notifiable_type column on the
        // database-notifications table (in-app notification bell).
        Relation::enforceMorphMap(['api_client' => ApiClient::class, 'user' => User::class]);
    }

    /**
     * A single choke point for realtime bell delivery — hooks Laravel's own
     * post-send event instead of threading a broadcast dispatch into every
     * TicketService call site that creates a "database" notification
     * (client leg, staff fan-out, and eventually the Trigger engine's
     * send_notification action). $event->response is the DatabaseChannel's
     * return value: the DatabaseNotification row that was just created,
     * whose id is the same one the bell already reads.
     */
    protected function broadcastBellNotifications(): void
    {
        Event::listen(NotificationSent::class, function (NotificationSent $event) {
            if ($event->channel !== 'database' || ! $event->notification instanceof TicketNotification) {
                return;
            }

            $data = $event->notification->toDatabase($event->notifiable);

            NotificationCreated::dispatch($event->notifiable->id, $event->response->id, $data['message'], $data['url']);
        });
    }

    /**
     * API keys get a generous per-key budget; unauthenticated requests (which
     * only ever hit the guard before rejecting with 401) get a much smaller
     * per-IP one so a single misconfigured client can't exhaust it for everyone.
     */
    protected function configureApiRateLimiting(): void
    {
        RateLimiter::for('api', function (Request $request) {
            $clientId = $request->user()?->id;

            return $clientId
                ? Limit::perMinute(120)->by('api-client:'.$clientId)
                : Limit::perMinute(30)->by('ip:'.$request->ip());
        });
    }

    /**
     * Avoid touching the DB during artisan commands that run before the
     * `settings` table exists (e.g. `migrate` itself), or before it can be
     * queried at all — shared by every settings-driven config override below.
     */
    protected function settingsTableUsable(): bool
    {
        if ($this->app->runningInConsole() && ! $this->app->runningUnitTests()) {
            return false;
        }

        try {
            return Schema::hasTable('settings');
        } catch (\Throwable) {
            return false;
        }
    }

    /**
     * Let the Admin -> Konfiguracja -> LDAP/AD screen override the .env-based
     * LDAP connection at runtime, so changes take effect without a redeploy.
     */
    protected function applyLdapSettingsOverride(): void
    {
        if (! $this->settingsTableUsable()) {
            return;
        }

        $host = Settings::get('ldap_host');

        if (! $host) {
            return;
        }

        $config = Config::get('ldap.connections.default', []);
        $config['hosts'] = [$host];
        $config['port'] = (int) Settings::get('ldap_port', $config['port'] ?? 389);
        $config['base_dn'] = Settings::get('ldap_base_dn', $config['base_dn'] ?? '');
        $config['username'] = Settings::get('ldap_bind_dn', $config['username'] ?? '');
        $config['password'] = Settings::get('ldap_bind_password') ?? $config['password'] ?? '';
        $config['use_tls'] = Settings::bool('ldap_use_ssl');

        Config::set('ldap.connections.default', $config);
        Container::addConnection(new Connection($config), 'default');
    }

    /**
     * Let the Admin -> Konfiguracja -> E-mail (SMTP) screen override the
     * .env-based mail transport/sender at runtime. Sender address/name and
     * footer apply regardless; the SMTP transport itself only when the admin
     * has explicitly enabled it (otherwise the .env `MAIL_MAILER` stands).
     */
    protected function applyMailSettingsOverride(): void
    {
        if (! $this->settingsTableUsable()) {
            return;
        }

        if (Settings::bool('mail_smtp_enabled') && Settings::get('mail_smtp_host')) {
            Config::set('mail.default', 'smtp');
            Config::set('mail.mailers.smtp.host', Settings::get('mail_smtp_host'));
            Config::set('mail.mailers.smtp.port', (int) Settings::get('mail_smtp_port', '587'));
            Config::set('mail.mailers.smtp.username', Settings::get('mail_smtp_username') ?: null);
            Config::set('mail.mailers.smtp.password', Settings::get('mail_smtp_password'));
            Config::set('mail.mailers.smtp.scheme', match (Settings::get('mail_smtp_encryption')) {
                'ssl' => 'smtps',
                'tls' => 'smtp',
                default => null,
            });
        }

        if ($address = Settings::get('mail_from_address')) {
            Config::set('mail.from.address', $address);
            Config::set('mail.from.name', Settings::get('mail_from_name') ?: Settings::get('company_name'));
        }
    }

    /**
     * Let the Admin -> Konfiguracja -> "Czas wygaśnięcia sesji" field override
     * the .env-based session lifetime. Only affects sessions created/renewed
     * after the change — already-active sessions keep their existing expiry.
     */
    protected function applySessionSettingsOverride(): void
    {
        if (! $this->settingsTableUsable()) {
            return;
        }

        $minutes = Settings::get('session_lifetime_minutes');

        if ($minutes) {
            Config::set('session.lifetime', (int) $minutes);
        }
    }

    /**
     * Let the Admin -> Konfiguracja -> "Strefa czasowa" field override the
     * .env-based app timezone at runtime, so every date shown or stored
     * (ticket timestamps, SLA deadlines, "x minutes ago" labels, ...)
     * reflects the admin's chosen zone instead of the container's UTC default.
     */
    protected function applyTimezoneSettingsOverride(): void
    {
        if (! $this->settingsTableUsable()) {
            return;
        }

        $timezone = Settings::timezone();

        Config::set('app.timezone', $timezone);
        date_default_timezone_set($timezone);
    }
}