<?php

namespace App\Http\Controllers\Support;

use App\Http\Controllers\Controller;
use App\Models\SupportTicket;
use App\Models\User;
use App\Notifications\NewSupportTicket;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Mail;
use Illuminate\Support\Facades\Notification;
use Illuminate\Support\Str;

final class SupportController extends Controller
{
    public function create(Request $request)
    {
        return view('support', [
            'categories' => [
                'technical' => 'Technical support',
                'licensing' => 'Licence & activation',
                'billing' => 'Billing & subscription',
                'feature' => 'Feature request',
                'privacy' => 'Privacy / data request',
                'general' => 'General enquiry',
            ],
        ]);
    }

    public function store(Request $request): RedirectResponse
    {
        // Honeypot: bots tend to fill hidden fields. Return success without retaining spam.
        if (filled($request->input('company_website'))) {
            return back()->with('status', 'Your support request has been received.');
        }

        $data = $request->validate([
            'name' => ['required', 'string', 'max:120'],
            'email' => ['required', 'email:rfc', 'max:254'],
            'category' => ['required', 'in:technical,licensing,billing,feature,privacy,general'],
            'subject' => ['required', 'string', 'max:180'],
            'message' => ['required', 'string', 'min:10', 'max:10000'],
            'privacy_notice' => ['accepted'],
        ]);

        $ticket = SupportTicket::create([
            'user_id' => $request->user()?->id,
            'reference' => $this->reference(),
            'name' => $data['name'],
            'email' => strtolower($data['email']),
            'category' => $data['category'],
            'subject' => $data['subject'],
            'message' => $data['message'],
            'privacy_notice_accepted_at' => now(),
        ]);

        $this->notifyTeam($ticket);

        Mail::raw(
            "We received your Rsync Studio support request.\n\nReference: {$ticket->reference}\nSubject: {$ticket->subject}\n\nWe will reply to this email address. Please keep the reference in any follow-up.",
            fn ($mail) => $mail->to($ticket->email)->subject("Rsync Studio support request {$ticket->reference}")
        );

        return redirect()->route('support')->with('status', "Support request {$ticket->reference} received. A confirmation has been emailed to you.");
    }

    private function notifyTeam(SupportTicket $ticket): void
    {
        if (config('rsync-studio.support.notify_admin_users', true)) {
            User::query()->where('is_admin', true)->get()->each->notify(new NewSupportTicket($ticket));
        }

        $emails = collect(config('rsync-studio.support.alert_emails', []))
            ->filter(fn ($email) => filter_var($email, FILTER_VALIDATE_EMAIL))
            ->unique()
            ->values();

        if ($emails->isNotEmpty()) {
            Notification::route('mail', $emails->all())->notify(new NewSupportTicket($ticket));
        }
    }

    private function reference(): string
    {
        do {
            $reference = 'RS-'.now()->format('ymd').'-'.Str::upper(Str::random(6));
        } while (SupportTicket::where('reference', $reference)->exists());

        return $reference;
    }
}