<?php

namespace App\BusProNet\XmlParser;

use Symfony\Component\DomCrawler\Crawler;

class ContingentParser extends AbstractParser
{
    private const CONTROL_ROOM_CODE = 'BelKal';

    /**
     * @var array<string>
     */
    private array $ignoredRoomCodes = [
        'PDGS',
    ];

    /**
     * @return array{roomTypes: array<int, array<string, mixed>>, rows: array<int, array<string, mixed>>}
     */
    public function parse(string $xml): array
    {
        $crawler = new Crawler($xml);
        $roomTypes = $this->parseRoomTypes($crawler);
        $rows = $this->parseRows($crawler, $roomTypes);

        return [
            'roomTypes' => $roomTypes,
            'rows' => $rows,
        ];
    }

    /**
     * @return array<int, array<string, mixed>>
     */
    private function parseRoomTypes(Crawler $crawler): array
    {
        $roomTypes = [];

        $crawler
            ->filterXPath('//unterbringungen/unterbringung')
            ->each(function (Crawler $node) use (&$roomTypes) {
                $roomId = $this->getIntOrNullAttribute($node->attr('idbuspro'));
                $code = $node->attr('code');

                if (null === $roomId || null === $code) {
                    return;
                }

                if (true === in_array($code, $this->ignoredRoomCodes, true)) {
                    return;
                }

                $label = $node->attr('zimmerbezeichnung')
                    ?? $this->getStringOrNullValue($node->filterXPath('.//text'))
                    ?? $code;

                $pax = $this->getIntOrNullAttribute($node->attr('pax_max')) ?? 0;
                $link = $this->getIntOrNullAttribute($node->attr('idbuspro_kontingent_aus'));

                $roomTypes[$roomId] = [
                    'idBusPro' => $roomId,
                    'code' => $code,
                    'pax' => $pax,
                    'label' => $label,
                    'isControlRoom' => self::CONTROL_ROOM_CODE === $code,
                    'link' => $link,
                ];
            });

        return $roomTypes;
    }

    /**
     * @param array<int, array<string, mixed>> $roomTypes
     *
     * @return array<int, array<string, mixed>>
     */
    private function parseRows(Crawler $crawler, array $roomTypes): array
    {
        $rows = [];

        $crawler
            ->filterXPath('//kapazitaeten/kapazitaet')
            ->each(function (Crawler $dateNode) use (&$rows, $roomTypes) {
                $date = $this->stringToDate($dateNode->attr('termin'));

                if (null === $date) {
                    return;
                }

                foreach ($roomTypes as $roomType) {
                    $roomId = $roomType['link'] ?? $roomType['idBusPro'];

                    $roomNode = $this->findRoomNode($dateNode, $roomId);
                    if (null === $roomNode) {
                        continue;
                    }

                    $capacity = $this->getIntOrNullAttribute($roomNode->attr('kontingent')) ?? 0;
                    $free = $this->getIntOrNullAttribute($roomNode->attr('frei')) ?? 0;
                    $statusRaw = $roomNode->attr('status') ?? '';

                    $rows[] = [
                        'date' => $date,
                        'roomCode' => $roomType['code'],
                        'roomLabel' => $roomType['label'],
                        'pax' => $roomType['isControlRoom'] ? 0 : $capacity * (int) ($roomType['pax'] ?? 0),
                        'available' => $roomType['isControlRoom'] ? 0 : $free * (int) ($roomType['pax'] ?? 0),
                        'status' => $this->mapStatus($statusRaw),
                        'minPrice' => $this->stringToFloat($roomNode->attr('abpreis')),
                        'minNights' => $this->getIntOrNullAttribute($roomNode->attr('abpreis_naechte')),
                        'additionalNightMinPrice' => $this->stringToFloat($roomNode->attr('abpreis_verlaengerung')),
                        'additionalNightMinNights' => $this->getIntOrNullAttribute($roomNode->attr('abpreis_verlaengerung_naechte')),
                        'isControlRoom' => $roomType['isControlRoom'],
                    ];
                }
            });

        return $rows;
    }

    private function findRoomNode(Crawler $dateNode, int $roomId): ?Crawler
    {
        $roomNode = $dateNode->filterXPath(sprintf('.//zimmerliste/zimmer[@idbuspro="%d"]', $roomId));
        if (0 < $roomNode->count()) {
            return $roomNode->first();
        }

        $roomNode = $dateNode->filterXPath(sprintf('.//zimmerliste/zimmer[@id="%d"]', $roomId));
        if (0 < $roomNode->count()) {
            return $roomNode->first();
        }

        $roomNode = $dateNode->filterXPath(sprintf('.//zimmerliste/zimmer[@id_zimmer="%d"]', $roomId));
        if (0 < $roomNode->count()) {
            return $roomNode->first();
        }

        return null;
    }

    private function mapStatus(?string $status): string
    {
        return match (strtoupper((string) $status)) {
            'A' => 'ON_REQUEST',
            'S' => 'BLOCKED',
            default => 'OK',
        };
    }
}