<?php

namespace App\BusProNet\XmlParser;

use App\BusProNet\Model\CrmAction;
use App\BusProNet\Model\CrmAttributes;
use App\BusProNet\Model\CrmSelection;
use App\BusProNet\Model\CrmSelectionGroup;
use App\BusProNet\Traits\TypeConversionTrait;
use App\Security\Role;
use Symfony\Component\DomCrawler\Crawler;

/**
 * Turns the SelektionCRM response into the roles and hotel codes the CRM claims for an account.
 *
 * This reports what BusPro says and nothing more: no fallback role, no default hotel code. What
 * is made of the claims — which are granted outright and which only nominate — is Role::sync()'s
 * business.
 *
 * The selection ids below are deployment-critical. BusPro always returns the full attribute tree
 * and expresses membership through the `auswahl` flag, so a wrong or unset id yields a perfectly
 * well-formed response in which nobody holds anything, and every user logging in is demoted one
 * at a time. There is no signal inside the response that tells that apart from a real revocation.
 */
class CrmAttributesResponseParser
{
    use TypeConversionTrait;

    /**
     * The CRM selections that stand for a role, by selection id. "Hausleitung" is deliberately not
     * in here: its ids are deployment configuration (see $houseManagerIds) and carry a hotel code
     * on top of the role.
     *
     * @var array<int, string> selection id => role
     */
    private const ROLE_BY_CRM_ID = [
        1070 => Role::TEAMER,
        1292 => Role::ADMIN,
        1293 => Role::MANAGER,
        1477 => Role::GROUPS_MANAGER,
        1478 => Role::GROUPS_ADMIN,
        1483 => Role::CUSTOMER_EXPERT,
    ];

    /**
     * @param array<int|string, string> $houseManagerIds "Hausleitung" selection id => hotel code
     */
    public function __construct(private readonly array $houseManagerIds = [])
    {
    }

    public function parse(Crawler $result): CrmAttributes
    {
        $groups = [];
        $actions = [];
        $roles = [];
        $hotelCodes = [];

        $result
            ->filterXPath('//selektionsmerkmale/selektionsgruppe')
            ->each(function (Crawler $node) use (&$groups, &$roles, &$hotelCodes) {
                $group = new CrmSelectionGroup();
                $group->id = (int) $node->attr('id');
                $group->label = $node->attr('bezeichnung');

                $attributes = [];

                $node
                    ->filterXPath('//selektion')
                    ->each(function (Crawler $node) use (&$attributes, &$roles, &$hotelCodes) {
                        $attribute = new CrmSelection();
                        $attribute->id = (int) $node->attr('id');
                        $attribute->label = $node->attr('bezeichnung');
                        $attribute->mutable = $this->stringToBool($node->attr('aenderbar'));
                        $attribute->selected = $this->stringToBool($node->attr('auswahl'));

                        if (true === $attribute->selected) {
                            $hotelCode = $this->houseManagerIds[$attribute->id] ?? null;

                            if (null !== $hotelCode) {
                                $roles[] = Role::HOUSE_MANAGER;
                                $hotelCodes[] = $hotelCode;
                            }

                            $role = self::ROLE_BY_CRM_ID[$attribute->id] ?? null;

                            if (null !== $role) {
                                $roles[] = $role;
                            }
                        }

                        $attributes[] = $attribute;
                    })
                ;

                $group->selections = $attributes;
                $groups[] = $group;
            })
        ;

        $result
            ->filterXPath('//crmaktionen/crmaktion')
            ->each(function (Crawler $node) use (&$actions) {
                $crmAction = new CrmAction();

                $crmAction->id = (int) $node->attr('id');
                $crmAction->code = $node->attr('code');
                $crmAction->label = $node->attr('bezeichnung');
                $crmAction->mutable = $this->stringToBool($node->attr('aenderbar'));
                $crmAction->selected = $this->stringToBool($node->attr('auswahl'));

                $actions[] = $crmAction;
            })
        ;

        $response = new CrmAttributes();
        $response->selectionGroups = $groups;
        $response->crmActions = $actions;
        $response->roles = array_values(array_unique($roles));
        $response->hotelCodes = array_values(array_unique($hotelCodes));

        return $response;
    }
}