<?php

namespace App\Http\Controllers\Give;

use App\Http\Controllers\Controller;
use App\Models\QrCode;
use App\Services\Qr\QrCodeManagerService;
use App\Services\Qr\QrImageGeneratorService;
use App\Services\Qr\QrPdfExporter;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;
use Illuminate\View\View;
use RuntimeException;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\StreamedResponse;

class GivingPageController extends Controller
{
    public function __construct(
        private QrCodeManagerService $manager,
        private QrImageGeneratorService $imageGenerator,
        private QrPdfExporter $pdfExporter,
    ) {}

    public function index(Request $request): View
    {
        $account = ladill_account();
        $qrCodes = $account->qrCodes()
            ->where('type', QrCode::TYPE_CHURCH)
            ->latest()
            ->get();

        $previewDataUris = $qrCodes->mapWithKeys(function (QrCode $qr) {
            return [$qr->id => $this->imageGenerator->previewDataUri($qr)];
        });

        return view('give.giving-pages.index', [
            'qrCodes' => $qrCodes,
            'previewDataUris' => $previewDataUris,
        ]);
    }

    public function create(): View
    {
        return view('give.giving-pages.create');
    }

    public function store(Request $request): RedirectResponse
    {
        $account = ladill_account();

        $request->validate([
            'label' => ['required', 'string', 'max:120'],
            'name' => ['required', 'string', 'max:120'],
            'org_type' => ['required', 'in:church,school,mosque,ngo,club'],
            'denomination' => ['nullable', 'string', 'max:120'],
            'description' => ['nullable', 'string', 'max:2000'],
            'phone' => ['nullable', 'string', 'max:30'],
            'email' => ['nullable', 'email', 'max:200'],
            'website' => ['nullable', 'url', 'max:2048'],
            'address' => ['nullable', 'string', 'max:500'],
            'service_times' => ['nullable', 'string', 'max:200'],
            'brand_color' => ['nullable', 'string', 'max:20'],
            'collection_types' => ['nullable', 'array', 'min:1'],
            'collection_types.*' => ['string', 'max:80'],
            'church_logo' => ['nullable', 'image', 'mimes:jpeg,jpg,png,gif,webp', 'max:4096'],
            'church_cover' => ['nullable', 'image', 'mimes:jpeg,jpg,png,gif,webp', 'max:8192'],
        ]);

        $data = array_merge($request->all(), [
            'type' => QrCode::TYPE_CHURCH,
            'currency' => 'GHS',
            'accepts_payment' => true,
            'church_logo' => $request->file('church_logo'),
            'church_cover' => $request->file('church_cover'),
        ]);

        try {
            $qrCode = $this->manager->create($account, $data);
        } catch (RuntimeException $e) {
            return back()->withInput()->with('error', $e->getMessage());
        }

        return redirect()->route('give.giving-pages.show', $qrCode)->with('success', 'Giving page created.');
    }

    public function show(QrCode $givingPage): View
    {
        $this->authorizeGivingPage($givingPage);

        return view('give.giving-pages.show', [
            'qrCode' => $givingPage->fresh(),
            'previewDataUri' => $this->imageGenerator->previewDataUri($givingPage),
        ]);
    }

    public function update(Request $request, QrCode $givingPage): RedirectResponse
    {
        $this->authorizeGivingPage($givingPage);

        $request->validate([
            'label' => ['sometimes', 'string', 'max:120'],
            'name' => ['sometimes', 'string', 'max:120'],
            'org_type' => ['sometimes', 'in:church,school,mosque,ngo,club'],
            'denomination' => ['nullable', 'string', 'max:120'],
            'description' => ['nullable', 'string', 'max:2000'],
            'phone' => ['nullable', 'string', 'max:30'],
            'email' => ['nullable', 'email', 'max:200'],
            'website' => ['nullable', 'url', 'max:2048'],
            'address' => ['nullable', 'string', 'max:500'],
            'service_times' => ['nullable', 'string', 'max:200'],
            'brand_color' => ['nullable', 'string', 'max:20'],
            'collection_types' => ['nullable', 'array', 'min:1'],
            'collection_types.*' => ['string', 'max:80'],
            'is_active' => ['sometimes', 'boolean'],
            'church_logo' => ['nullable', 'image', 'mimes:jpeg,jpg,png,gif,webp', 'max:4096'],
            'church_cover' => ['nullable', 'image', 'mimes:jpeg,jpg,png,gif,webp', 'max:8192'],
        ]);

        $data = array_merge($request->all(), [
            'accepts_payment' => true,
            'is_active' => $request->boolean('is_active', $givingPage->is_active),
            'church_logo' => $request->file('church_logo'),
            'church_cover' => $request->file('church_cover'),
        ]);

        try {
            $this->manager->update($givingPage, $data);
        } catch (RuntimeException $e) {
            return back()->withInput()->with('error', $e->getMessage());
        }

        return back()->with('success', 'Giving page updated.');
    }

    public function destroy(QrCode $givingPage): RedirectResponse
    {
        $this->authorizeGivingPage($givingPage);

        $this->manager->delete($givingPage);

        return redirect()
            ->route('give.giving-pages.index')
            ->with('success', 'Giving page deleted.');
    }

    public function preview(QrCode $givingPage): Response
    {
        $this->authorizeGivingPage($givingPage);

        $qrCode = $this->imageGenerator->ensureValidImages($givingPage);
        $bytes = $this->imageGenerator->normalizeStoredPng($qrCode->png_path);

        if ($bytes === null) {
            $bytes = $this->imageGenerator->renderPng($qrCode->encodedPayload(), $qrCode->style());
            $this->imageGenerator->generateAndStore($qrCode);
        }

        return response($bytes, 200, [
            'Content-Type' => 'image/png',
            'Cache-Control' => 'private, max-age=3600',
        ]);
    }

    public function download(QrCode $givingPage, string $format): StreamedResponse
    {
        $this->authorizeGivingPage($givingPage);

        $qrCode = $this->imageGenerator->ensureValidImages($givingPage);
        $path = $format === 'svg' ? $qrCode->svg_path : $qrCode->png_path;
        $filename = Str::slug($qrCode->label).'-qr.'.($format === 'svg' ? 'svg' : 'png');

        if ($format === 'png') {
            $bytes = $this->imageGenerator->normalizeStoredPng($path);
            if ($bytes === null) {
                $bytes = $this->imageGenerator->renderPng($qrCode->encodedPayload(), $qrCode->style());
                $this->imageGenerator->generateAndStore($qrCode);
            }

            return response()->streamDownload(fn () => print($bytes), $filename, [
                'Content-Type' => 'image/png',
            ]);
        }

        if ($format === 'pdf') {
            $bytes = $this->imageGenerator->normalizeStoredPng($qrCode->png_path);
            if ($bytes === null) {
                $bytes = $this->imageGenerator->renderPng($qrCode->encodedPayload(), $qrCode->style());
                $this->imageGenerator->generateAndStore($qrCode);
            }

            $pdf = $this->pdfExporter->fromPng($bytes, $qrCode->label);

            return response()->streamDownload(fn () => print($pdf), Str::slug($qrCode->label).'-qr.pdf', [
                'Content-Type' => 'application/pdf',
            ]);
        }

        abort_unless($path && Storage::disk('qr')->exists($path), 404);

        return Storage::disk('qr')->download($path, $filename);
    }

    private function authorizeGivingPage(QrCode $givingPage): void
    {
        abort_unless($givingPage->type === QrCode::TYPE_CHURCH, 404);
        abort_unless($givingPage->user_id === ladill_account()->id, 403);
    }
}