<?php

namespace App\Livewire;

use Livewire\Component;

class BoardDispatcher extends Component
{
    public array $lists = [];

    public string $boardVersion = '';

    public function mount()
    {
        $this->boardVersion = uniqid();

        $this->lists['source-1'] = [
            ['id' => '1', 'name' => 'Source Item A', 'origin' => 'source-1'],
            ['id' => '2', 'name' => 'Source Item B', 'origin' => 'source-1'],
        ];
        $this->lists['source-2'] = [
            ['id' => '3', 'name' => 'Source Item C', 'origin' => 'source-2'],
        ];
        $this->lists['source-3'] = [
            ['id' => '4', 'name' => 'Source Item D', 'origin' => 'source-3'],
            ['id' => '5', 'name' => 'Source Item E', 'origin' => 'source-3'],
        ];
        $this->lists['source-4'] = [
            ['id' => '6', 'name' => 'Source Item F', 'origin' => 'source-4'],
        ];

        for ($i = 1; $i <= 21; $i++) {
            $this->lists["dest-{$i}"] = [];
        }
    }

    public function moveItem($itemId, $fromList, $toList, $newIndex)
    {
        $itemId = (string) $itemId;
        $newIndex = (int) $newIndex;

        if (! $toList || $fromList === $toList || ! isset($this->lists[$fromList]) || ! isset($this->lists[$toList])) {
            $this->boardVersion = uniqid();

            return;
        }

        // Limit-Guard: Wenn das Ziel bereits ein Element enthält, abbrechen
        if (count($this->lists[$toList]) >= 1) {
            $this->boardVersion = uniqid();

            return;
        }

        $foundItem = null;

        foreach ($this->lists[$fromList] as $key => $item) {
            if ((string) $item['id'] === $itemId) {
                $foundItem = $item;
                unset($this->lists[$fromList][$key]);
                $this->lists[$fromList] = array_values($this->lists[$fromList]);
                break;
            }
        }

        if ($foundItem) {
            array_splice($this->lists[$toList], $newIndex, 0, [$foundItem]);
        }

        $this->boardVersion = uniqid();
    }

    public function returnToOrigin($itemId, $currentListId)
    {
        $itemId = (string) $itemId;

        if (! isset($this->lists[$currentListId])) {
            $this->boardVersion = uniqid();

            return;
        }

        $foundItem = null;

        foreach ($this->lists[$currentListId] as $key => $item) {
            if ((string) $item['id'] === $itemId) {
                $foundItem = $item;
                unset($this->lists[$currentListId][$key]);
                $this->lists[$currentListId] = array_values($this->lists[$currentListId]);
                break;
            }
        }

        if ($foundItem && isset($this->lists[$foundItem['origin']])) {
            // Nur zurücklegen, wenn die Quelle wirklich frei ist
            if (count($this->lists[$foundItem['origin']]) < 1) {
                array_unshift($this->lists[$foundItem['origin']], $foundItem);
            } else {
                // Ausfallsicherheit gegen Datenverlust: Zurück in die Bucht schieben
                array_unshift($this->lists[$currentListId], $foundItem);
            }
        }

        $this->boardVersion = uniqid();
    }

    public function resetBoard()
    {
        // Alle 21 Zielbays durchlaufen
        for ($i = 1; $i <= 21; $i++) {
            $bayKey = "dest-{$i}";

            if (isset($this->lists[$bayKey]) && ! empty($this->lists[$bayKey])) {
                foreach ($this->lists[$bayKey] as $item) {
                    $targetOrigin = $item['origin'];

                    // Element zurück in sein Original-Quell-Tab schieben
                    if (isset($this->lists[$targetOrigin])) {
                        array_unshift($this->lists[$targetOrigin], $item);
                    }
                }

                // Die Zielbucht komplett leeren
                $this->lists[$bayKey] = [];
            }
        }

        // Falls Sie die boardVersion-Logik nutzen, erneuern wir sie hier für den DOM-Refresh:
        if (property_exists($this, 'boardVersion')) {
            $this->boardVersion = uniqid();
        }

        // Falls Sie die Javascript-Event/ignore-Logik nutzen, feuern wir das Refresh-Event:
        $this->dispatch('refreshBoard', lists: $this->lists);
    }

    public function render()
    {
        return view('livewire.board-dispatcher');
    }
}