<?php

namespace App\Services\Frontdesk;

use App\Models\Host;
use App\Models\Member;
use App\Models\Organization;
use App\Models\User;
use App\Models\Visitor;
use App\Models\Visit;
use App\Notifications\FrontdeskAlertNotification;
use App\Services\Comms\EmailService;
use App\Services\Comms\SmsService;
use Illuminate\Support\Facades\Log;

class NotificationDispatcher
{
    public function __construct(
        protected EmailService $email,
        protected SmsService $sms,
        protected NotificationPreferenceService $preferences,
    ) {}

    public function visitorArrived(Visit $visit): void
    {
        $this->dispatchVisitEvent(
            $visit,
            'visitor_arrived',
            'Visitor has arrived',
            "{$visit->visitor->full_name} has checked in.",
            ['icon' => 'user-check'],
        );
    }

    public function visitorCheckedOut(Visit $visit): void
    {
        $this->dispatchVisitEvent(
            $visit,
            'visitor_checked_out',
            'Visitor checked out',
            "{$visit->visitor->full_name} has checked out.",
            ['icon' => 'logout'],
        );
    }

    public function visitorExpected(Visit $visit): void
    {
        $when = $visit->scheduled_at?->format('M j, g:i A') ?? 'today';
        $this->dispatchVisitEvent(
            $visit,
            'visitor_expected',
            'Visitor expected',
            "{$visit->visitor->full_name} is expected on {$when}.",
            ['icon' => 'calendar'],
        );
    }

    public function visitorWaiting(Visit $visit): void
    {
        $this->dispatchVisitEvent(
            $visit,
            'visitor_waiting',
            'Visitor waiting',
            "{$visit->visitor->full_name} is waiting in reception.",
            ['icon' => 'clock'],
        );
    }

    public function visitCancelled(Visit $visit): void
    {
        $this->dispatchVisitEvent(
            $visit,
            'visit_cancelled',
            'Visit cancelled',
            "The visit for {$visit->visitor->full_name} has been cancelled.",
            ['icon' => 'x-circle'],
        );
    }

    public function approvalNeeded(Visit $visit): void
    {
        $visit->load(['visitor', 'host', 'organization']);

        $this->dispatchVisitEvent(
            $visit,
            'approval_needed',
            'Visitor awaiting approval',
            "{$visit->visitor->full_name} ({$visit->visitor_type}) is waiting for approval.",
            ['icon' => 'shield-alert'],
        );

        $this->notifyStaffUsers(
            $visit->organization,
            'approval_needed',
            'Approval required',
            "{$visit->visitor->full_name} needs reception approval.",
            $visit,
        );
    }

    public function watchlistBlockedAttempt(Visitor $visitor, Organization $organization): void
    {
        Log::alert('Watchlist blocked check-in attempt', [
            'visitor_id' => $visitor->id,
            'visitor' => $visitor->full_name,
            'organization_id' => $organization->id,
        ]);

        $this->notifyStaffUsers(
            $organization,
            'watchlist_alert',
            'Blocked check-in attempt',
            "{$visitor->full_name} (blacklisted) attempted to check in.",
        );
    }

    public function watchlistFlaggedCheckIn(Visitor $visitor, Organization $organization): void
    {
        Log::warning('Watchlist flagged visitor submitted for approval', [
            'visitor_id' => $visitor->id,
            'visitor' => $visitor->full_name,
        ]);

        $this->notifyStaffUsers(
            $organization,
            'watchlist_alert',
            'Flagged visitor check-in',
            "{$visitor->full_name} requires approval before badge issue.",
        );
    }

    public function badgeExpired(Visit $visit): void
    {
        $visit->load(['visitor', 'organization']);

        $this->notifyStaffUsers(
            $visit->organization,
            'badge_expired',
            'Expired badge',
            "{$visit->visitor->full_name}'s badge expired while still checked in.",
            $visit,
        );
    }

    /** @param  array<string, mixed>  $meta */
    protected function dispatchVisitEvent(
        Visit $visit,
        string $event,
        string $title,
        string $message,
        array $meta = [],
    ): void {
        $visit->load(['visitor', 'host', 'organization']);
        $channels = $this->preferences->channelsForEvent($visit->organization, $event);

        if ($channels === [] || ! $visit->host) {
            return;
        }

        $this->notifyHost($visit->host, $visit->organization, $channels, $title, $message, $visit, $event, $meta);
    }

    /** @param  list<string>  $channels */
    protected function notifyHost(
        Host $host,
        Organization $organization,
        array $channels,
        string $title,
        string $message,
        ?Visit $visit = null,
        ?string $event = null,
        array $meta = [],
    ): void {
        if (in_array('email', $channels, true) && $host->email) {
            try {
                $this->email->send($host->email, $title, $message);
            } catch (\Throwable $e) {
                Log::warning('Frontdesk host email failed', ['host_id' => $host->id, 'error' => $e->getMessage()]);
            }
        }

        if (in_array('sms', $channels, true) && $host->phone) {
            $this->sms->send($host->phone, "{$title}: {$message}");
        }

        if ($host->user_ref) {
            $user = User::where('public_id', $host->user_ref)->first();
            if ($user) {
                $user->notify(new FrontdeskAlertNotification($title, $message, array_merge($meta, [
                    'event' => $event,
                    'visit_id' => $visit?->id,
                    'url' => $visit ? route('frontdesk.visits.show', $visit) : null,
                ])));
            }
        }
    }

    protected function notifyStaffUsers(
        Organization $organization,
        string $event,
        string $title,
        string $message,
        ?Visit $visit = null,
    ): void {
        if (! $this->preferences->isEventEnabled($organization, $event)) {
            return;
        }

        $roles = ['org_admin', 'branch_admin', 'receptionist', 'security_officer'];

        $userRefs = Member::query()
            ->where('organization_id', $organization->id)
            ->whereIn('role', $roles)
            ->pluck('user_ref')
            ->unique();

        foreach ($userRefs as $userRef) {
            $user = User::where('public_id', $userRef)->first();
            if (! $user) {
                continue;
            }

            $user->notify(new FrontdeskAlertNotification($title, $message, [
                'event' => $event,
                'visit_id' => $visit?->id,
                'url' => $visit ? route('frontdesk.visits.show', $visit) : route('frontdesk.dashboard'),
                'icon' => 'bell',
            ]));
        }
    }
}