<?php

namespace App\Http\Controllers;

use App\Http\Controllers\Concerns\SortsLists;
use App\Http\Requests\StoreCableRequest;
use App\Http\Requests\UpdateCableRequest;
use App\Models\Equipment;
use App\Models\Manufacturer;
use App\Services\EquipmentFileService;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

/**
 * Katalog kabli - pełny CRUD (legacy site206 / site206A / site206E / site206inf).
 * Dane w seg_equipments (EQU_TYPE_ID=13) + załączniki BLOB w seg_equipments_files.
 * Usuwanie logiczne (EQU_STATUS='0'); blokowane gdy kabel jest na stanie
 * (seg_equipments_stock) - jak legacy. Newest methods: Eloquent + Form Requests.
 */
class CableController extends Controller
{
    use SortsLists;

    /** EQU_TYPE_ID kabli (sys_dictionaries). */
    private const TYPE_CABLE = 13;

    /** Producent „Wszyscy" (jak legacy: 100). */
    private const MCF_ALL = 100;

    /** Sortowalne kolumny listy: klucz nagłówka => kolumna SQL. */
    private const SORTABLE = [
        'name' => 'EQU_NAME',
        'mcf'  => 'm.MCF_NAME',
    ];

    public function __construct(private readonly EquipmentFileService $files) {}

    public function index(Request $request)
    {
        $q   = trim((string) $request->query('q', ''));
        $mcf = (int) $request->query('mcf', self::MCF_ALL);

        [$sort, $dir] = $this->sortParams($request);

        $cables = Equipment::query()
            ->visible()->ofType(self::TYPE_CABLE)->with('manufacturer')
            ->when($q !== '', fn ($w) => $w->where('EQU_NAME', 'like', '%'.$q.'%'))
            ->when($mcf !== self::MCF_ALL, fn ($w) => $w->where('EQU_MCF_ID', $mcf))
            ->when($sort === 'mcf', fn ($w) => $w
                ->leftJoin('seg_manufacturers as m', 'm.MCF_ID', '=', 'seg_equipments.EQU_MCF_ID')
                ->select('seg_equipments.*'))
            ->when($sort !== null, fn ($w) => $w->orderBy(self::SORTABLE[$sort], $dir))
            ->orderBy('EQU_NAME')
            ->paginate(20)
            ->withQueryString();

        return view('catalog.cables.index', [
            'cables'        => $cables,
            'manufacturers' => $this->manufacturers(),
            'q'             => $q,
            'mcf'           => $mcf,
            'mcfAll'        => self::MCF_ALL,
        ]);
    }

    public function create()
    {
        return view('catalog.cables.create', ['manufacturers' => $this->manufacturers()]);
    }

    public function store(StoreCableRequest $request)
    {
        $data = $request->validated();

        $cable = Equipment::create([
            'EQU_NAME'        => $data['name'],
            'EQU_MCF_ID'      => $data['manufacturer_id'],
            'EQU_DESCRIPTION' => $data['description'] ?? null,
            'EQU_TYPE_ID'     => self::TYPE_CABLE,
            'EQU_STATUS'      => '1',
        ]);

        $this->saveFiles($request, $cable->EQU_ID);

        return redirect()->route('cables.show', $cable)
            ->with('status', 'Dodano typ kabla „'.$cable->EQU_NAME.'".');
    }

    public function show(Equipment $cable)
    {
        abort_unless((int) $cable->EQU_TYPE_ID === self::TYPE_CABLE, 404);
        $cable->load('manufacturer', 'files');

        return view('catalog.cables.show', [
            'cable'     => $cable,
            'document'  => $cable->files->first(fn ($f) => ! $f->isImage()),
            'image'     => $cable->files->first(fn ($f) => $f->isImage()),
            'inStock'   => $this->inStock($cable->EQU_ID),
        ]);
    }

    public function edit(Equipment $cable)
    {
        abort_unless((int) $cable->EQU_TYPE_ID === self::TYPE_CABLE, 404);
        $cable->load('manufacturer', 'files');

        return view('catalog.cables.edit', [
            'cable'         => $cable,
            'manufacturers' => $this->manufacturers(),
            'document'      => $cable->files->first(fn ($f) => ! $f->isImage()),
            'image'         => $cable->files->first(fn ($f) => $f->isImage()),
        ]);
    }

    public function update(UpdateCableRequest $request, Equipment $cable)
    {
        abort_unless((int) $cable->EQU_TYPE_ID === self::TYPE_CABLE, 404);
        $data = $request->validated();

        $cable->update([
            'EQU_NAME'        => $data['name'],
            'EQU_MCF_ID'      => $data['manufacturer_id'],
            'EQU_DESCRIPTION' => $data['description'] ?? null,
        ]);

        $this->saveFiles($request, $cable->EQU_ID);

        return redirect()->route('cables.show', $cable)
            ->with('status', 'Zaktualizowano typ kabla „'.$cable->EQU_NAME.'".');
    }

    public function destroy(Equipment $cable)
    {
        abort_unless((int) $cable->EQU_TYPE_ID === self::TYPE_CABLE, 404);

        // Legacy: nie usuwaj, gdy kabel jest na stanie (seg_equipments_stock).
        if ($this->inStock($cable->EQU_ID)) {
            return redirect()->route('cables.show', $cable)
                ->with('error', 'Nie można usunąć - kabel jest powiązany ze stanem magazynowym.');
        }

        $cable->update(['EQU_STATUS' => '0']); // usuwanie logiczne

        return redirect()->route('cables.index')
            ->with('status', 'Usunięto typ kabla „'.$cable->EQU_NAME.'".');
    }

    /** Zapis przesłanych plików (dokumentacja + zdjęcie), jeśli są. */
    private function saveFiles(Request $request, int $equId): void
    {
        $user = $request->user()->USR_USERNAME;
        if ($request->hasFile('catalogue_file')) {
            $this->files->store($equId, $request->file('catalogue_file'), $user);
        }
        if ($request->hasFile('image_file')) {
            $this->files->store($equId, $request->file('image_file'), $user);
        }
    }

    private function inStock(int $equId): bool
    {
        return DB::connection('softspm')->table('seg_equipments_stock')
            ->where('SES_EQU_ID', $equId)->exists();
    }

    private function manufacturers()
    {
        return Manufacturer::orderBy('MCF_NAME')->pluck('MCF_NAME', 'MCF_ID');
    }
}