<?php

namespace App\Http\Controllers;

use App\Http\Controllers\Concerns\SortsLists;
use App\Http\Requests\StorePumpRequest;
use App\Http\Requests\UpdatePumpRequest;
use App\Models\Manufacturer;
use App\Models\Pump;
use App\Services\PumpService;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

/**
 * Katalog pomp - pełny CRUD (legacy site203 / site203A / site203E / site203inf).
 * Newest methods: Eloquent, resource controller, Form Requests, serwis domenowy.
 */
class PumpController extends Controller
{
    use SortsLists;

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

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

    public function __construct(private readonly PumpService $pumps) {}

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

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

        $pumps = Pump::query()
            ->visible()
            ->with('manufacturer')
            ->where('PUP_Q_N', '>', 0)
            ->when($q !== '' && $by === 'name', fn ($w) => $w->where('PUP_NAME', 'like', '%'.$q.'%'))
            ->when($q !== '' && $by === 'flow', function ($w) use ($q) {
                $v = (float) str_replace(',', '.', $q);
                $w->whereBetween('PUP_Q_N', [$v - $v * 0.1, $v + $v * 0.1]); // skala UAT bez ×60
            })
            ->when($mcf !== self::MCF_ALL, fn ($w) => $w->where('PUP_MCF_ID', $mcf))
            // Sortowanie po producencie wymaga joinu (relacja nie jest w FROM).
            ->when($sort === 'mcf', fn ($w) => $w
                ->leftJoin('seg_manufacturers as m', 'm.MCF_ID', '=', 'seg_pumps.PUP_MCF_ID')
                ->select('seg_pumps.*'))
            ->when($sort !== null, fn ($w) => $w->orderBy(self::SORTABLE[$sort], $dir))
            ->orderBy('PUP_Q_N')
            ->orderBy('PUP_NAME')
            ->paginate(20)
            ->withQueryString();

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

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

    public function store(StorePumpRequest $request)
    {
        $pump = $this->pumps->create($request->validated());

        return redirect()
            ->route('pumps.show', $pump)
            ->with('status', 'Dodano pompę „'.$pump->PUP_NAME.'".');
    }

    public function show(Request $request, Pump $pump)
    {
        $pump->load('manufacturer');

        $h   = $this->pumps->curve($pump, 'H');     // x = m³/h (bez /60)
        $eta = $this->pumps->curve($pump, 'ETA');

        // Warunki rysowania jak legacy: H bez zer, η dopuszcza 1 zero (punkt Q=0).
        $hDrawable   = $this->pumps->curveDrawable($h, 0);
        $etaDrawable = $this->pumps->curveDrawable($eta, 1);

        // Przelicz dla zadanego Q [m³/h]. Domyślnie Q_n; clamp do zakresu.
        $maxX  = (float) ($h->max('x') ?? 0);
        $qn    = round((float) $pump->PUP_Q_N, 3);
        $qIn   = $request->query('q');
        $q     = $qIn === null ? $qn : (float) str_replace(',', '.', (string) $qIn);
        $outOfRange = $q < 0 || $q > $maxX;
        $q     = max(0, min($q, $maxX));

        $relatedEngines = DB::connection('softspm')->table('seg_pump_engine_rel as r')
            ->leftJoin('seg_engines as e', 'e.ENG_ID', '=', 'r.RPE_ENG_ID')
            ->leftJoin('seg_manufacturers as m', 'm.MCF_ID', '=', 'e.ENG_MCF_ID')
            ->where('r.RPE_PUP_ID', $pump->PUP_ID)
            ->select('e.ENG_NAME', 'e.ENG_VOLTAGE', 'e.ENG_POWER', 'm.MCF_NAME')
            ->get();

        return view('catalog.pumps.show', [
            'pump'           => $pump,
            'h'              => $h,
            'eta'            => $eta,
            'hDrawable'      => $hDrawable,
            'etaDrawable'    => $etaDrawable,
            'hPlot'          => $hDrawable ? $this->pumps->plot($h) : null,
            'etaPlot'        => $etaDrawable ? $this->pumps->plot($eta) : null,
            'relatedEngines' => $relatedEngines,
            'q'              => $q,
            'hAtQ'           => $hDrawable ? $this->pumps->valueAt($h, $q) : null,
            'etaAtQ'         => $etaDrawable ? $this->pumps->valueAt($eta, $q) : null,
            'outOfRange'     => $outOfRange,
        ]);
    }

    public function edit(Pump $pump)
    {
        $pump->load('manufacturer');

        return view('catalog.pumps.edit', [
            'pump'          => $pump,
            'manufacturers' => $this->manufacturers(),
            'h'             => $this->pumps->curve($pump, 'H'),
            'eta'           => $this->pumps->curve($pump, 'ETA'),
            'qn'            => round((float) $pump->PUP_Q_N, 3),
        ]);
    }

    public function update(UpdatePumpRequest $request, Pump $pump)
    {
        $this->pumps->update($pump, $request->validated());

        return redirect()
            ->route('pumps.show', $pump)
            ->with('status', 'Zaktualizowano pompę „'.$pump->PUP_NAME.'".');
    }

    public function destroy(Pump $pump)
    {
        $this->pumps->delete($pump);

        return redirect()
            ->route('pumps.index')
            ->with('status', 'Usunięto pompę „'.$pump->PUP_NAME.'".');
    }

    /** MCF_ID => MCF_NAME do selectów. */
    private function manufacturers()
    {
        return Manufacturer::orderBy('MCF_NAME')->pluck('MCF_NAME', 'MCF_ID');
    }
}