<?php

namespace App\Http\Controllers;

use App\Models\AssignedTests;
use App\Models\MultipleChoiceAnswers;
use App\Models\SingleChoiceAnswer;
use App\Models\SingleQuestionAnswers;
use App\Models\Test;
use App\Models\User;
use Illuminate\Http\Request;

class TestController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index(Request $request)
    {
        $tests = $request->user()->tests()->get();
        return view("tests.index", [
            "tests" => $tests
        ]);
    }

    /**
     * Show the form for creating a new resource.
     */
    public function create()
    {
        //
    }

    /**
     * Store a newly created resource in storage.
     */
    public function store(Request $request)
    {
        $validated = $request->validate([
            "name" => "required|string"
        ]);

        $request->user()->tests()->create($validated);

        return redirect(route("tests.index"));
    }

    /**
     * Display the specified resource.
     */
    public function show(Test $test)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     */
    public function edit(Test $test)
    {
        $questions = $test->questions()->get();
        foreach ($questions as $question) {
            if ($question->answer_type == "single_answer") {
                $answer = SingleQuestionAnswers::where("question_id", $question->id)->first();
                $question->answer = $answer->answer;
            } else if ($question->answer_type == "single_choice") {
                $answer = SingleChoiceAnswer::where("question_id", $question->id)->first();
                $question->answer = $answer->correct_answer;
            } else if ($question->answer_type == "multiple_choice") {
                $answer = MultipleChoiceAnswers::where("question_id", $question->id)->first();
                $valid_answer = array();
                if ($answer->is_answer1_correct) {
                    array_push($valid_answer, $answer->answer1);
                }
                if ($answer->is_answer2_correct) {
                    array_push($valid_answer, $answer->answer2);
                }
                if ($answer->is_answer3_correct) {
                    array_push($valid_answer, $answer->answer3);
                }
                if ($answer->is_answer4_correct) {
                    array_push($valid_answer, $answer->answer4);
                }
                $question->answer = join(", ", $valid_answer);
            }
        }

        $students = User::where("role", "student")->get()->toArray();

        $assigned_students = [];
        foreach (AssignedTests::where("test_id", $test->id)->get() as $assigned_student) {
            $backing_student = User::where("id", $assigned_student->student_id)->first();
            $assigned_student->name = $backing_student->name;

            foreach ($students as $idx => $student) {
                if ($student["id"] == $assigned_student->student_id) {
                    unset($students[$idx]);
                }
            }

            array_push($assigned_students, $assigned_student);
        }

        return view("tests.edit", [
            "test" => $test,
            "questions" => $questions,
            "students" => $students,
            "assigned_students" => $assigned_students,
        ]);
    }

    /**
     * Update the specified resource in storage.
     */
    public function update(Request $request, Test $test)
    {
        $validated = $request->validate([
            "name" => "required|string"
        ]);

        $test->update($validated);

        return redirect(route("tests.index"));
    }

    /**
     * Remove the specified resource from storage.
     */
    public function destroy(Test $test)
    {
        $test->delete();

        return redirect(route("tests.index"));
    }
}