<?php

namespace App\Http\Controllers;

use App\Models\Comment;
use App\Models\Video;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class CommentController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth')->except(['index']);
    }

    public function index(Video $video)
    {
        $comments = $video->comments()->whereNull('parent_id')->with(['user', 'replies.user'])->get();
        return response()->json($comments);
    }

    public function store(Request $request, Video $video)
    {
        $request->validate([
            'body' => 'required|string|max:1000',
            'parent_id' => 'nullable|exists:comments,id',
        ]);

        $comment = $video->comments()->create([
            'user_id' => Auth::id(),
            'body' => $request->body,
            'parent_id' => $request->parent_id,
        ]);

        // Handle mentions
        preg_match_all('/@(\w+)/', $request->body, $matches);
        if (!empty($matches[1])) {
            // Mentions found - in production, you would send notifications here
            // For now, we just parse them
        }

        return response()->json($comment->load('user'));
    }

    public function update(Request $request, Comment $comment)
    {
        if ($comment->user_id !== Auth::id()) {
            return response()->json(['error' => 'Unauthorized'], 403);
        }

        $request->validate([
            'body' => 'required|string|max:1000',
        ]);

        $comment->update([
            'body' => $request->body,
        ]);

        return response()->json($comment->load('user'));
    }

    public function destroy(Comment $comment)
    {
        if ($comment->user_id !== Auth::id()) {
            return response()->json(['error' => 'Unauthorized'], 403);
        }

        $comment->delete();
        return response()->json(['success' => true]);
    }
}