<?php

namespace App\Http\Controllers\Api\Posts;

use App\Http\Controllers\Controller;
use App\Models\Post;
use App\Models\PostComment;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

/**
 * POST   /api/posts/{post_id}/comments/{comment_id}/highlight
 * DELETE /api/posts/{post_id}/comments/{comment_id}/highlight
 *
 * Only the post owner may highlight/un-highlight.
 * Only 1 highlighted comment per post is allowed at a time.
 */
class PostCommentHighlightController extends Controller
{
    public function highlight(Request $request, int $postId, int $commentId): JsonResponse
    {
        $post    = Post::findOrFail($postId);
        $comment = PostComment::where('post_id', $postId)->findOrFail($commentId);

        if ($request->user()->id !== $post->user_id) {
            abort(403, 'Only the post owner can highlight comments.');
        }

        DB::transaction(function () use ($post, $comment) {
            // Remove any existing highlight on this post
            PostComment::where('post_id', $post->id)
                ->where('is_highlighted', true)
                ->update(['is_highlighted' => false]);

            $comment->update(['is_highlighted' => true]);
        });

        return response()->json(['message' => 'Comment highlighted.', 'comment_id' => $comment->id]);
    }

    public function unhighlight(Request $request, int $postId, int $commentId): JsonResponse
    {
        $post    = Post::findOrFail($postId);
        $comment = PostComment::where('post_id', $postId)->findOrFail($commentId);

        if ($request->user()->id !== $post->user_id) {
            abort(403, 'Only the post owner can remove comment highlights.');
        }

        $comment->update(['is_highlighted' => false]);

        return response()->json(['message' => 'Highlight removed.', 'comment_id' => $comment->id]);
    }
}