<?php

namespace App\Services\Woo;

use App\Models\WooStore;
use Illuminate\Http\Request;
use Illuminate\Http\UploadedFile;

class ProductMediaService
{
    public function __construct(private PluginClient $client) {}

    /** @return list<array{id?: int, src: string, alt?: string, position?: int}> */
    public function buildImagesFromRequest(Request $request, WooStore $store): array
    {
        /** @var list<array<string, mixed>> $images */
        $images = json_decode((string) $request->input('product_images', '[]'), true) ?? [];
        if (! is_array($images)) {
            $images = [];
        }

        if ($request->hasFile('featured_image_upload')) {
            $uploaded = $this->upload($store, $request->file('featured_image_upload'), (string) $request->input('featured_image_alt', ''));
            if ($uploaded !== null) {
                $images[0] = $uploaded;
            }
        } elseif ($src = trim((string) $request->input('featured_image_src', ''))) {
            $images[0] = [
                'src' => $src,
                'alt' => trim((string) $request->input('featured_image_alt', '')),
            ];
        }

        foreach ($request->file('gallery_uploads', []) as $file) {
            if ($file instanceof UploadedFile && $file->isValid()) {
                $uploaded = $this->upload($store, $file, '');
                if ($uploaded !== null) {
                    $images[] = $uploaded;
                }
            }
        }

        foreach ((array) $request->input('gallery_image_srcs', []) as $src) {
            if (! is_string($src)) {
                continue;
            }
            $src = trim($src);
            if ($src !== '') {
                $images[] = ['src' => $src, 'alt' => ''];
            }
        }

        return $this->normalizeImages($images);
    }

    /** @return array{id: int, src: string, alt: string}|null */
    public function upload(WooStore $store, UploadedFile $file, string $alt = ''): ?array
    {
        $response = $this->client->uploadMedia($store, $file, $alt);

        if (! is_array($response) || empty($response['src'])) {
            return null;
        }

        return [
            'id' => (int) ($response['id'] ?? 0),
            'src' => (string) $response['src'],
            'alt' => (string) ($response['alt'] ?? $alt),
        ];
    }

    /** @param  list<array<string, mixed>>  $images */
    private function normalizeImages(array $images): array
    {
        $normalized = [];

        foreach (array_values($images) as $position => $image) {
            if (! is_array($image)) {
                continue;
            }

            $src = trim((string) ($image['src'] ?? ''));
            $id = (int) ($image['id'] ?? 0);

            if ($src === '' && $id <= 0) {
                continue;
            }

            $row = [
                'alt' => trim((string) ($image['alt'] ?? '')),
                'position' => $position,
            ];

            if ($id > 0) {
                $row['id'] = $id;
            }
            if ($src !== '') {
                $row['src'] = $src;
            }

            $normalized[] = $row;
        }

        return $normalized;
    }
}