<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\QuestionnaireQuestion;
use App\Models\QuestionnaireSet;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;

class QuestionController extends Controller
{
    public function store(Request $request, QuestionnaireSet $set): RedirectResponse
    {
        $data = $request->validate([
            'question_text' => 'required|string|max:1000',
            'question_type' => 'required|in:rating,single_choice,multiple_choice,short_text,long_text',
            'is_required'   => 'boolean',
            'options'       => 'nullable|array',
            'options.*'     => 'required|string|max:255',
        ]);

        $needsOptions = in_array($data['question_type'], ['single_choice', 'multiple_choice']);
        if ($needsOptions && empty($data['options'])) {
            return back()->withErrors(['options' => 'Pilihan jawapan diperlukan untuk jenis soalan ini.'])->withInput();
        }

        $maxOrder = $set->questions()->max('sort_order') ?? 0;

        $set->questions()->create([
            'question_text' => $data['question_text'],
            'question_type' => $data['question_type'],
            'is_required'   => $data['is_required'] ?? true,
            'options_json'  => $needsOptions ? array_values(array_filter($data['options'] ?? [])) : null,
            'sort_order'    => $maxOrder + 1,
        ]);

        return redirect()->route('admin.questionnaires.show', $set)
            ->with('success', 'Soalan berjaya ditambah.');
    }

    public function update(Request $request, QuestionnaireQuestion $question): RedirectResponse
    {
        $data = $request->validate([
            'question_text' => 'required|string|max:1000',
            'question_type' => 'required|in:rating,single_choice,multiple_choice,short_text,long_text',
            'is_required'   => 'boolean',
            'options'       => 'nullable|array',
            'options.*'     => 'required|string|max:255',
        ]);

        $needsOptions = in_array($data['question_type'], ['single_choice', 'multiple_choice']);

        $question->update([
            'question_text' => $data['question_text'],
            'question_type' => $data['question_type'],
            'is_required'   => $data['is_required'] ?? true,
            'options_json'  => $needsOptions ? array_values(array_filter($data['options'] ?? [])) : null,
        ]);

        return redirect()->route('admin.questionnaires.show', $question->questionnaire_set_id)
            ->with('success', 'Soalan berjaya dikemaskini.');
    }

    public function destroy(QuestionnaireQuestion $question): RedirectResponse
    {
        $setId = $question->questionnaire_set_id;
        $question->delete();

        return redirect()->route('admin.questionnaires.show', $setId)
            ->with('success', 'Soalan berjaya dipadam.');
    }

    public function reorder(Request $request): JsonResponse
    {
        $data = $request->validate([
            'order'   => 'required|array',
            'order.*' => 'integer|exists:questionnaire_questions,id',
        ]);

        foreach ($data['order'] as $sortOrder => $questionId) {
            QuestionnaireQuestion::where('id', $questionId)
                ->update(['sort_order' => $sortOrder + 1]);
        }

        return response()->json(['ok' => true]);
    }
}