<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Models\Question;
use App\Models\Option;
use App\Models\Quiz;
use Illuminate\Support\Facades\DB;

class QuestionController extends Controller
{
    public function store(Request $request, Quiz $quiz)
    {
        $request->validate([
            'title' => 'nullable|string|max:255',
            'context' => 'nullable|string',
            'label' => 'required|string',
            'points' => 'required|integer|min:1',
            'type' => 'required|in:qcm,open',
            'options' => 'required_if:type,qcm|array',
            'options.*.option_text' => 'nullable|required_if:type,qcm|string',
            'options.*.is_correct' => 'nullable|required_if:type,qcm|boolean',
        ]);

        DB::transaction(function () use ($request, $quiz) {
            $question = Question::create([
                'quiz_id' => $quiz->id,
                'title' => $request->title,
                'context' => $request->context,
                'label' => $request->label,
                'points' => $request->points,
                'type' => $request->type
            ]);

            if ($request->type === 'qcm') {
                foreach ($request->options as $opt) {
                    Option::create([
                        'question_id' => $question->id,
                        'option_text' => $opt['option_text'],
                        'is_correct' => $opt['is_correct']
                    ]);
                }
            }
        });

        return back()->with('success', 'Question ajoutée avec succès.');
    }

    public function update(Request $request, Quiz $quiz, Question $question)
    {
        $request->validate([
            'title' => 'nullable|string|max:255',
            'context' => 'nullable|string',
            'label' => 'required|string',
            'points' => 'required|integer|min:1',
            'type' => 'required|in:qcm,open',
            'options' => 'required_if:type,qcm|array',
            'options.*.option_text' => 'nullable|required_if:type,qcm|string',
            'options.*.is_correct' => 'nullable|required_if:type,qcm|boolean',
        ]);

        DB::transaction(function () use ($request, $question) {
            $question->update([
                'title' => $request->title,
                'context' => $request->context,
                'label' => $request->label,
                'points' => $request->points,
                'type' => $request->type
            ]);

            if ($request->type === 'qcm') {
                $question->options()->delete();
                foreach ($request->options as $opt) {
                    Option::create([
                        'question_id' => $question->id,
                        'option_text' => $opt['option_text'],
                        'is_correct' => $opt['is_correct']
                    ]);
                }
            } else {
                $question->options()->delete();
            }
        });

        return back()->with('success', 'Question mise à jour avec succès.');
    }

    public function destroy(Quiz $quiz, Question $question)
    {
        $question->delete();

        return back()->with('success', 'Question supprimée avec succès.');
    }
}