<?php

namespace App\Http\Controllers\Pos;

use App\Http\Controllers\Controller;
use App\Http\Controllers\Pos\Concerns\ScopesToAccount;
use App\Models\PosDevice;
use App\Models\PosLocation;
use App\Services\Pos\DeviceService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;
use Illuminate\View\View;

class DeviceController extends Controller
{
    use ScopesToAccount;

    public function __construct(private DeviceService $devices) {}

    public function index(Request $request): View
    {
        $owner = $this->ownerRef($request);

        $query = PosDevice::owned($owner)->with('location')->orderBy('name');
        $this->scopeToLocation($request, $query);

        $devices = $query->paginate(25);

        $statsQuery = PosDevice::owned($owner);
        $this->scopeToLocation($request, $statsQuery);

        $heroStats = [
            'total' => (clone $statsQuery)->count(),
            'online' => (clone $statsQuery)
                ->where('status', PosDevice::STATUS_ONLINE)
                ->where('last_online_at', '>=', now()->subMinutes(10))
                ->count(),
            'displays' => (clone $statsQuery)
                ->whereIn('type', ['customer_display', 'kitchen_display'])
                ->count(),
        ];

        return view('pos.devices.index', [
            'devices' => $devices,
            'deviceTypes' => config('pos.device_types', []),
            'heroStats' => $heroStats,
        ]);
    }

    public function create(Request $request): View
    {
        return view('pos.devices.create', [
            'deviceTypes' => config('pos.device_types', []),
            'hints' => config('pos.device_registration_hints', []),
            'locations' => $this->locations($request),
            'defaultLocationId' => $this->location($request)->id,
        ]);
    }

    public function store(Request $request): RedirectResponse
    {
        $types = array_keys(config('pos.device_types', []));
        $owner = $this->ownerRef($request);

        $validated = $request->validate([
            'name' => ['required', 'string', 'max:255'],
            'type' => ['required', 'string', Rule::in($types)],
            'location_id' => ['nullable', 'integer'],
        ]);

        $locationId = $validated['location_id'] ?? null;
        if ($locationId) {
            $this->assertLocationOwned($request, (int) $locationId);
        }

        if (in_array($validated['type'], ['customer_display', 'kitchen_display'], true) && ! $locationId) {
            return back()->withInput()->with('error', 'Choose a branch for this display device.');
        }

        $this->devices->register([
            'owner_ref' => $owner,
            'name' => $validated['name'],
            'type' => $validated['type'],
            'location_id' => $locationId,
        ]);

        return redirect()->route('pos.devices.index')->with('success', 'Device registered.');
    }

    public function edit(Request $request, PosDevice $device): View
    {
        $this->authorizeOwner($request, $device);

        return view('pos.devices.edit', [
            'device' => $device,
            'deviceTypes' => config('pos.device_types', []),
            'hints' => config('pos.device_registration_hints', []),
            'locations' => $this->locations($request),
            'openUrl' => $this->devices->openUrl($device),
        ]);
    }

    public function update(Request $request, PosDevice $device): RedirectResponse
    {
        $this->authorizeOwner($request, $device);

        $types = array_keys(config('pos.device_types', []));
        $validated = $request->validate([
            'name' => ['required', 'string', 'max:255'],
            'type' => ['required', 'string', Rule::in($types)],
            'location_id' => ['nullable', 'integer'],
            'status' => ['nullable', 'string', Rule::in([
                PosDevice::STATUS_ONLINE,
                PosDevice::STATUS_OFFLINE,
                PosDevice::STATUS_MAINTENANCE,
            ])],
        ]);

        if (! empty($validated['location_id'])) {
            $this->assertLocationOwned($request, (int) $validated['location_id']);
        }

        $device->update([
            'name' => $validated['name'],
            'type' => $validated['type'],
            'location_id' => $validated['location_id'] ?: null,
            'status' => $validated['status'] ?? $device->status,
        ]);

        return redirect()->route('pos.devices.index')->with('success', 'Device updated.');
    }

    public function destroy(Request $request, PosDevice $device): RedirectResponse
    {
        $this->authorizeOwner($request, $device);
        $device->delete();

        return redirect()->route('pos.devices.index')->with('success', 'Device removed.');
    }

    public function regenerateToken(Request $request, PosDevice $device): RedirectResponse
    {
        $this->authorizeOwner($request, $device);
        $this->devices->regenerateToken($device);

        return back()->with('success', 'Device token regenerated. Re-open the device URL if needed.');
    }

    /** @return \Illuminate\Support\Collection<int, PosLocation> */
    protected function locations(Request $request)
    {
        $query = PosLocation::owned($this->ownerRef($request))->orderBy('name');
        $scope = $this->locationScope($request);
        if ($scope !== null) {
            $query->whereKey($scope);
        }

        return $query->get();
    }

    protected function assertLocationOwned(Request $request, int $locationId): void
    {
        $exists = PosLocation::owned($this->ownerRef($request))->whereKey($locationId)->exists();
        abort_unless($exists, 404);

        $scope = $this->locationScope($request);
        if ($scope !== null) {
            abort_unless($locationId === $scope, 404);
        }
    }
}