<?php

namespace App\Support\Publishing;

use App\Models\Post;
use App\Models\Site;
use Illuminate\Http\Client\ConnectionException;
use Illuminate\Support\Facades\Http;

class WordPressPublisher implements Publisher
{
    public function supports(Post $post): bool
    {
        return $post->type === 'blog';
    }

    public function publish(Post $post): PublishResult
    {
        if (! $post->title) {
            return PublishResult::rejected("Post {$post->id} has no title, required to publish to WordPress.");
        }

        $site = $post->site;

        if ($site->cms_type !== 'wordpress') {
            return PublishResult::rejected("Site '{$site->name}' is not configured as WordPress (cms_type={$site->cms_type}).");
        }

        if (! $site->wp_username || ! $site->wp_app_password) {
            return PublishResult::rejected("Site '{$site->name}' is missing WordPress credentials.");
        }

        $payload = [
            'title' => $post->title,
            'content' => $post->body,
            'status' => 'publish',
        ];

        if ($post->image_url) {
            $mediaId = $this->uploadFeaturedImage($post, $site);

            if ($mediaId instanceof PublishResult) {
                return $mediaId;
            }

            $payload['featured_media'] = $mediaId;
        }

        try {
            $response = Http::withBasicAuth($site->wp_username, $site->wp_app_password)
                ->post(rtrim($site->url, '/').'/wp-json/wp/v2/posts', $payload);
        } catch (ConnectionException $e) {
            return PublishResult::failed("could not connect to site: {$e->getMessage()}");
        }

        if ($response->failed()) {
            return PublishResult::failed($response->json('message') ?? 'unexpected response from WordPress');
        }

        $link = $response->json('link');

        if (! $link) {
            return PublishResult::failed('unexpected response from WordPress: missing post link');
        }

        return PublishResult::success($link);
    }

    private function uploadFeaturedImage(Post $post, Site $site): int|PublishResult
    {
        try {
            $image = Http::get($post->image_url);
        } catch (ConnectionException $e) {
            return PublishResult::failed("could not download image: {$e->getMessage()}");
        }

        if ($image->failed()) {
            return PublishResult::failed('could not download image: unexpected response from image URL');
        }

        $filename = basename(parse_url($post->image_url, PHP_URL_PATH) ?: '') ?: 'image.jpg';
        $contentType = $image->header('Content-Type') ?: 'application/octet-stream';

        try {
            $response = Http::withBasicAuth($site->wp_username, $site->wp_app_password)
                ->withBody($image->body(), $contentType)
                ->withHeaders(['Content-Disposition' => "attachment; filename=\"{$filename}\""])
                ->post(rtrim($site->url, '/').'/wp-json/wp/v2/media');
        } catch (ConnectionException $e) {
            return PublishResult::failed("could not connect to site: {$e->getMessage()}");
        }

        if ($response->failed()) {
            return PublishResult::failed($response->json('message') ?? 'unexpected response from WordPress while uploading the image');
        }

        $mediaId = $response->json('id');

        if (! $mediaId) {
            return PublishResult::failed('unexpected response from WordPress: missing media id');
        }

        return $mediaId;
    }
}