<?php

namespace App\Http\Controllers\SuperAdmin;

use App\Filament\Pages\Contabilita\FatturaElettronicaScheda;
use App\Http\Controllers\Controller;
use App\Models\FatturaElettronica;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Storage;
use Illuminate\View\View;

class DiagnosticaFattureElettronicheController extends Controller
{
    public function index(Request $request): View
    {
        $sampleLimit = 1500;
        $maxRowsPerBucket = 200;

        $totalFe = FatturaElettronica::query()->count();

        $missingPdfPathCount = FatturaElettronica::query()
            ->where(function ($q) {
                $q->whereNull('allegato_pdf_path')->orWhere('allegato_pdf_path', '');
            })
            ->count();

        $missingXmlPathCount = FatturaElettronica::query()
            ->where(function ($q) {
                $q->whereNull('xml_path')->orWhere('xml_path', '');
            })
            ->where(function ($q) {
                $q->whereNull('xml_content')->orWhere('xml_content', '');
            })
            ->count();

        $duplicatePdfPaths = FatturaElettronica::query()
            ->select('allegato_pdf_path', DB::raw('COUNT(*) as cnt'))
            ->whereNotNull('allegato_pdf_path')
            ->where('allegato_pdf_path', '!=', '')
            ->groupBy('allegato_pdf_path')
            ->having('cnt', '>', 1)
            ->orderByDesc('cnt')
            ->limit(100)
            ->get();

        $duplicatePdfPathSet = [];
        foreach ($duplicatePdfPaths as $row) {
            $p = (string) ($row->allegato_pdf_path ?? '');
            if ($p !== '') {
                $duplicatePdfPathSet[$p] = (int) ($row->cnt ?? 0);
            }
        }

        $missingPdfPathRows = FatturaElettronica::query()
            ->where(function ($q) {
                $q->whereNull('allegato_pdf_path')->orWhere('allegato_pdf_path', '');
            })
            ->orderByDesc('id')
            ->limit($maxRowsPerBucket)
            ->get();

        $duplicatePdfPathRows = empty($duplicatePdfPathSet)
            ? collect()
            : FatturaElettronica::query()
                ->whereIn('allegato_pdf_path', array_keys($duplicatePdfPathSet))
                ->orderByDesc('id')
                ->limit($maxRowsPerBucket)
                ->get();

        $missingPdfOnDiskRows = [];
        $pdfExistenceChecked = 0;
        $sampleWithPdfPath = FatturaElettronica::query()
            ->whereNotNull('allegato_pdf_path')
            ->where('allegato_pdf_path', '!=', '')
            ->orderByDesc('id')
            ->limit($sampleLimit)
            ->get();

        foreach ($sampleWithPdfPath as $fe) {
            $pdfExistenceChecked++;
            $path = is_string($fe->allegato_pdf_path) ? $fe->allegato_pdf_path : '';
            if ($path !== '' && ! Storage::disk('local')->exists($path)) {
                $missingPdfOnDiskRows[] = $fe;
                if (count($missingPdfOnDiskRows) >= $maxRowsPerBucket) {
                    break;
                }
            }
        }

        $problemRows = collect()
            ->merge($missingPdfPathRows)
            ->merge($duplicatePdfPathRows)
            ->merge($missingPdfOnDiskRows)
            ->unique('id')
            ->values();

        $rows = $problemRows->map(function (FatturaElettronica $fe) use ($duplicatePdfPathSet) {
            $pdfPath = is_string($fe->allegato_pdf_path) ? $fe->allegato_pdf_path : '';
            $xmlPath = is_string($fe->xml_path) ? $fe->xml_path : '';

            $pdfExists = $pdfPath !== '' ? Storage::disk('local')->exists($pdfPath) : false;
            $xmlExists = $xmlPath !== '' ? Storage::disk('local')->exists($xmlPath) : false;

            $issues = [];

            if ($pdfPath === '') {
                $issues[] = ['type' => 'danger', 'label' => 'PDF path mancante'];
            } elseif (! $pdfExists) {
                $issues[] = ['type' => 'danger', 'label' => 'PDF file mancante'];
            }

            if ($pdfPath !== '' && array_key_exists($pdfPath, $duplicatePdfPathSet)) {
                $issues[] = ['type' => 'warning', 'label' => 'PDF path duplicato (' . (int) $duplicatePdfPathSet[$pdfPath] . ')'];
            }

            $hasXmlContent = is_string($fe->xml_content) && trim($fe->xml_content) !== '';
            if ($xmlPath === '' && ! $hasXmlContent) {
                $issues[] = ['type' => 'danger', 'label' => 'XML mancante'];
            } elseif ($xmlPath !== '' && ! $xmlExists && ! $hasXmlContent) {
                $issues[] = ['type' => 'warning', 'label' => 'XML file mancante'];
            }

            return [
                'id' => (int) $fe->id,
                'stabile_id' => (int) $fe->stabile_id,
                'fornitore' => (string) ($fe->fornitore_denominazione ?: ''),
                'data' => optional($fe->data_fattura)->format('Y-m-d'),
                'numero' => (string) ($fe->numero_fattura ?: ''),
                'totale' => (float) ($fe->totale ?: 0),
                'sdi_file' => (string) ($fe->sdi_file ?: ''),
                'pdf_path' => $pdfPath,
                'xml_path' => $xmlPath,
                'pdf_exists' => $pdfExists,
                'xml_exists' => $xmlExists,
                'issues' => $issues,
                'filament_url' => FatturaElettronicaScheda::getUrl(['record' => (int) $fe->id], panel: 'admin-filament'),
                'pdf_inline_url' => route('admin.fatture-elettroniche.download-pdf', ['fattura' => (int) $fe->id]) . '?inline=1',
                'pdf_download_url' => route('admin.fatture-elettroniche.download-pdf', ['fattura' => (int) $fe->id]),
                'xml_download_url' => route('admin.fatture-elettroniche.download-xml', ['fattura' => (int) $fe->id]),
            ];
        })->all();

        return view('superadmin.diagnostica_fatture_elettroniche', [
            'totalFe' => $totalFe,
            'missingPdfPathCount' => $missingPdfPathCount,
            'missingXmlPathCount' => $missingXmlPathCount,
            'duplicatePdfPathsCount' => count($duplicatePdfPathSet),
            'pdfExistenceChecked' => $pdfExistenceChecked,
            'missingPdfOnDiskCount' => count($missingPdfOnDiskRows),
            'rows' => $rows,
        ]);
    }
}