<?php

namespace App\Console\Commands;

use App\Models\Attribute;
use App\Models\Product;
use App\Models\ProductImage;
use App\Models\UserWhitelabelProduct;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;

/**
 * WL-01: Rein lesende Bestandsprüfung der White-Label-Daten.
 * Meldet Konflikte mit IDs, ändert nichts.
 */
class WhitelabelReport extends Command
{
    protected $signature = 'whitelabel:report
                            {--since=2026-07-27 : Bestellungen ab diesem Datum prüfen (Anlage der Farbprodukte)}';

    protected $description = 'Bestandsprüfung White Label: fehlende Kundenzuordnungen, Farbwidersprüche, fehlende Dateien, Dubletten (nur lesend)';

    /** @var array<string, string> */
    private array $attributeColors = [];

    public function handle(): int
    {
        $this->attributeColors = Attribute::query()->where('attribute_type_id', 1)->get()
            ->mapWithKeys(fn (Attribute $a) => [(string) $a->id => $this->normalizeColor(strtok((string) $a->name, ' ') ?: '')])
            ->all();

        $findings = 0;
        $findings += $this->ordersWithoutAssignment((string) $this->option('since'));
        $findings += $this->colorMismatches();
        $findings += $this->customerImagesWithoutMatch();
        $findings += $this->missingFiles();
        $findings += $this->duplicates();
        $findings += $this->productsWithoutOrMultipleStandardLabels();

        $this->newLine();
        $this->info($findings === 0 ? 'Keine Befunde.' : $findings.' Befund(e). Es wurde nichts geändert.');

        return self::SUCCESS;
    }

    /** Bestellungen mit White-Label-Produkt ohne Kundenzuordnung, obwohl der Partner anderswo Logos hat. */
    private function ordersWithoutAssignment(string $since): int
    {
        $rows = DB::table('shopping_orders as so')
            ->join('shopping_order_items as soi', 'soi.shopping_order_id', '=', 'so.id')
            ->join('products as p', 'p.id', '=', 'soi.product_id')
            ->where('p.whitelabel', true)
            ->where('so.created_at', '>=', $since)
            ->whereNull('soi.deleted_at')
            ->whereNotNull('so.auth_user_id')
            ->whereIn('so.auth_user_id', fn ($q) => $q->select('user_id')->from('user_whitelabel_products'))
            ->whereNotExists(fn ($q) => $q->selectRaw('1')->from('user_whitelabel_products as uwp')
                ->whereColumn('uwp.user_id', 'so.auth_user_id')
                ->whereColumn('uwp.product_id', 'soi.product_id'))
            ->select('so.id as order_id', 'so.auth_user_id as user_id', 'soi.product_id', 'p.name', 'so.user_white_label', 'so.created_at')
            ->distinct()
            ->orderBy('so.id')
            ->get();

        $this->section('A) Bestellungen ab '.$since.' ohne Kundenzuordnung (Partner hat Logos bei anderen Produkten)', $rows->count());
        if ($rows->isNotEmpty()) {
            $this->table(['Bestellung', 'Partner', 'Produkt', 'Name', 'user_white_label', 'Datum'],
                $rows->map(fn ($r) => [$r->order_id, $r->user_id, $r->product_id, $r->name, $r->user_white_label ? 'ja' : 'nein', substr((string) $r->created_at, 0, 10)])->all());
        }

        return $rows->count();
    }

    /** Farbe am Kundenbild (Attribut) widerspricht der Farbe im Produktnamen "(Tiegel X)". */
    private function colorMismatches(): int
    {
        $rows = [];
        foreach (UserWhitelabelProduct::with(['product', 'whitelabel_images'])->orderBy('id')->get() as $assignment) {
            $productColor = $this->productColor($assignment->product);
            if ($productColor === null) {
                continue;
            }
            foreach ($assignment->whitelabel_images as $image) {
                $imageColors = collect((array) $image->attributes)
                    ->map(fn ($id) => $this->attributeColors[(string) $id] ?? null)
                    ->filter()->unique()->values();
                if ($imageColors->isNotEmpty() && ! $imageColors->contains($productColor)) {
                    $rows[] = [$assignment->id, $assignment->user_id, $assignment->product_id, $assignment->product->name, $image->id, $imageColors->join(', ')];
                }
            }
        }

        $this->section('B) Farbwiderspruch: Kundenbild-Variante passt nicht zur Produktfarbe', count($rows));
        if ($rows !== []) {
            $this->table(['Zuordnung', 'Partner', 'Produkt', 'Produktname', 'Bild', 'Bildfarbe(n)'], $rows);
        }

        return count($rows);
    }

    /** Kundenbilder, die im Lieferschein nie greifen: ohne Variante oder ohne Überschneidung mit dem Standardetikett. */
    private function customerImagesWithoutMatch(): int
    {
        $rows = [];
        foreach (UserWhitelabelProduct::with(['product.whitelabel_images', 'whitelabel_images'])->orderBy('id')->get() as $assignment) {
            if (! $assignment->product) {
                $rows[] = [$assignment->id, $assignment->user_id, $assignment->product_id, '-', 'Produkt existiert nicht'];

                continue;
            }
            $standardAttributes = $assignment->product->whitelabel_images
                ->flatMap(fn ($img) => (array) $img->attributes)->map(fn ($v) => (string) $v)->unique();

            foreach ($assignment->whitelabel_images as $image) {
                $own = collect((array) $image->attributes)->map(fn ($v) => (string) $v);
                if ($own->isEmpty()) {
                    $rows[] = [$assignment->id, $assignment->user_id, $assignment->product_id, $image->id, 'keine Variante am Kundenbild'];
                } elseif ($standardAttributes->isEmpty()) {
                    $rows[] = [$assignment->id, $assignment->user_id, $assignment->product_id, $image->id, 'Produkt hat kein Standardetikett'];
                } elseif ($own->intersect($standardAttributes)->isEmpty()) {
                    $rows[] = [$assignment->id, $assignment->user_id, $assignment->product_id, $image->id, 'keine Überschneidung mit Standardetikett ('.$own->join(',').' vs. '.$standardAttributes->join(',').')'];
                }
            }
            if ($assignment->whitelabel_images->isEmpty()) {
                $rows[] = [$assignment->id, $assignment->user_id, $assignment->product_id, '-', 'Zuordnung ohne Kundenbild'];
            }
        }

        $this->section('C) Kundenzuordnungen, die im Lieferschein nicht greifen', count($rows));
        if ($rows !== []) {
            $this->table(['Zuordnung', 'Partner', 'Produkt', 'Bild', 'Grund'], $rows);
        }

        return count($rows);
    }

    private function missingFiles(): int
    {
        $rows = [];
        foreach (ProductImage::query()->whereIn('type', ['uwllogo', 'wllogo'])->orderBy('id')->get() as $image) {
            if (! file_exists($image->getBaseImagePath())) {
                $rows[] = [$image->id, $image->type, $image->product_id ?? '-', $image->user_wl_product_id ?? '-', $image->getImagePath()];
            }
        }

        $this->section('D) Etikettbilder ohne Datei', count($rows));
        if ($rows !== []) {
            $this->table(['Bild', 'Typ', 'Produkt', 'Zuordnung', 'Pfad'], $rows);
        }

        return count($rows);
    }

    private function duplicates(): int
    {
        $rows = DB::table('user_whitelabel_products')
            ->select('user_id', 'product_id', DB::raw('count(*) as c'))
            ->groupBy('user_id', 'product_id')->having('c', '>', 1)->get();

        $this->section('E) Dubletten (user_id, product_id)', $rows->count());
        if ($rows->isNotEmpty()) {
            $this->table(['Partner', 'Produkt', 'Anzahl'], $rows->map(fn ($r) => [$r->user_id, $r->product_id, $r->c])->all());
        }

        return $rows->count();
    }

    private function productsWithoutOrMultipleStandardLabels(): int
    {
        $rows = [];
        foreach (Product::query()->where('whitelabel', true)->withCount('whitelabel_images')->orderBy('id')->get() as $product) {
            if ($product->whitelabel_images_count === 0) {
                $rows[] = [$product->id, $product->name, 'kein Standardetikett'];
            } elseif ($product->whitelabel_images_count > 1) {
                $rows[] = [$product->id, $product->name, $product->whitelabel_images_count.' Standardetiketten (Mehrfachetikett prüfen)'];
            }
            if ($this->productColor($product) === null) {
                $rows[] = [$product->id, $product->name, 'keine Farbe im Produktnamen erkennbar'];
            }
        }

        $this->section('F) White-Label-Produkte mit fehlendem/mehrfachem Standardetikett oder ohne erkennbare Farbe', count($rows));
        if ($rows !== []) {
            $this->table(['Produkt', 'Name', 'Befund'], $rows);
        }

        return count($rows);
    }

    private function productColor(?Product $product): ?string
    {
        if (! $product || ! preg_match('/\(Tiegel\s+([^)]+)\)/iu', (string) $product->name, $m)) {
            return null;
        }

        return $this->normalizeColor($m[1]);
    }

    private function normalizeColor(string $value): string
    {
        return str_replace(['ß', 'ss'], 'ss', mb_strtolower(trim($value)));
    }

    private function section(string $title, int $count): void
    {
        $this->newLine();
        $this->line('<comment>'.$title.'</comment> – '.$count);
    }
}