<?php

namespace App\Services\Pos;

use App\Models\PosLocation;
use Illuminate\Http\Request;
use Illuminate\Support\Collection;

class PosLocationService
{
    public function ensureDefault(string $ownerRef): PosLocation
    {
        $existing = PosLocation::owned($ownerRef)
            ->where('is_default', true)
            ->first()
            ?? PosLocation::owned($ownerRef)->orderBy('id')->first();

        if ($existing) {
            return $existing;
        }

        return PosLocation::create([
            'owner_ref' => $ownerRef,
            'name' => 'Main register',
            'currency' => config('pos.default_currency', 'GHS'),
            'is_default' => true,
        ]);
    }

    public function resolve(Request $request): PosLocation
    {
        $acting = $request->attributes->get('actingLocation');
        if ($acting instanceof PosLocation) {
            return $acting;
        }

        return $this->ensureDefault($this->ownerRefFromRequest($request));
    }

    /** @return Collection<int, PosLocation> */
    public function accessible(string $ownerRef, ?int $locationScope): Collection
    {
        $query = PosLocation::owned($ownerRef)->orderBy('name');

        if ($locationScope !== null) {
            $query->where('id', $locationScope);
        }

        return $query->get();
    }

    public function switch(Request $request, int $locationId): PosLocation
    {
        $ownerRef = $this->ownerRefFromRequest($request);
        $scope = $request->attributes->get('pos.locationScope');

        $location = PosLocation::owned($ownerRef)->whereKey($locationId)->firstOrFail();

        if ($scope !== null && (int) $scope !== $location->id) {
            abort(403, 'You do not have access to that branch.');
        }

        if (! $request->is('api/*')) {
            $request->session()->put('ladill_pos_location', $location->id);
        }

        $request->attributes->set('actingLocation', $location);

        return $location;
    }

    private function ownerRefFromRequest(Request $request): string
    {
        $user = ladill_account() ?? $request->user();

        return (string) $user->public_id;
    }
}