<?php

namespace App\Livewire\Modals;

use App\Models\Device;
use App\Models\DiscoveryFinding;
use App\Models\Room;
use App\Services\MqttCredentialProvisioner;
use Livewire\Attributes\Computed;
use LivewireUI\Modal\ModalComponent;

class AssignDevice extends ModalComponent
{
    public string $findingUuid = '';

    public string $name = '';

    public ?int $roomId = null;

    public static function modalMaxWidth(): string
    {
        return 'lg';
    }

    public function mount(string $finding): void
    {
        $model = DiscoveryFinding::where('uuid', $finding)->firstOrFail();
        $this->findingUuid = $model->uuid;
        $this->name = $model->name ?? $model->identifier;
    }

    #[Computed]
    public function finding(): DiscoveryFinding
    {
        return DiscoveryFinding::where('uuid', $this->findingUuid)->firstOrFail();
    }

    public function assign()
    {
        $this->validate([
            'name' => 'required|string|max:100',
            'roomId' => 'nullable|integer|exists:rooms,id',
        ]);

        $finding = $this->finding();
        $isShelly = $finding->vendor === 'Shelly';

        // The Shelly MQTT topic prefix is its device id — the mDNS service INSTANCE name
        // (finding->name), not the slugified topic identifier which carries the _shelly._tcp suffix.
        $prefix = $isShelly ? ($finding->name ?: $finding->identifier) : null;

        $device = Device::create([
            'name' => $this->name,
            'vendor' => $finding->vendor,
            'model' => $finding->model,
            'protocol' => $isShelly ? 'mqtt' : null,
            'config' => $prefix ? ['mqtt_prefix' => $prefix] : null,
            'room_id' => $this->roomId ?: null,
            'status' => 'active',
        ]);

        $finding->update(['status' => 'assigned', 'device_id' => $device->id]);

        // Provision a per-device MQTT credential (bound to its own prefix by the ACL) and
        // surface it once so the user can enter it into the Shelly.
        if ($isShelly && $prefix) {
            $password = app(MqttCredentialProvisioner::class)->provision($prefix);
            session()->flash('mqtt_credential', [
                'username' => $prefix,
                'password' => $password,
                'port' => (int) config('mqtt-client.connections.default.port', 1883),
            ]);
        }

        $this->closeModal();

        return redirect()->route('devices.show', $device);
    }

    public function render()
    {
        return view('livewire.modals.assign-device', [
            'finding' => $this->finding(),
            'rooms' => Room::orderBy('sort')->orderBy('name')->get(),
        ]);
    }
}