<?php

namespace App\Livewire\Tasks;

use Illuminate\Contracts\View\View;
use Livewire\Attributes\Lazy;
use Livewire\Attributes\Layout;
use Livewire\Attributes\Url;
use Livewire\Component;

#[Layout('layouts.dashboard', ['active' => 'tasks'])]
#[Lazy]
class Run extends Component
{
    public string $slug = '';
    public array $task = [];
    public array $questions = [];
    public int $currentStep = 1;
    public int $totalSteps = 0;
    public bool $finished = false;
    public int $correctAnswers = 0;
    public ?int $lastAnswerIndex = null;
    public ?bool $lastAnswerCorrect = null;

    /** Lerni AI helper panel — toggled via showLerni; can be shared via URL (?lerni=1). */
    #[Url(as: 'lerni', keep: false)]
    public bool $showLerni = false;

    public function mount(string $slug): void
    {
        $task = $this->findTask($slug);
        abort_if($task === null, 404, "Task '{$slug}' not found.");

        $this->slug = $slug;
        $this->task = $task;
        $this->questions = config("task-questions.{$slug}", []);
        $this->totalSteps = count($this->questions);

        abort_if($this->totalSteps === 0, 404, "No questions configured for task '{$slug}'.");
    }

    public static function placeholder(array $params = []): View
    {
        return view('livewire.tasks.run-placeholder');
    }

    public function currentQuestion(): array
    {
        return $this->questions[$this->currentStep - 1] ?? $this->questions[0];
    }

    public function submitAnswer(int $optionIndex): void
    {
        $q = $this->currentQuestion();
        $isCorrect = $optionIndex === ($q['correct'] ?? -1);

        $this->lastAnswerIndex = $optionIndex;
        $this->lastAnswerCorrect = $isCorrect;

        if ($isCorrect) {
            $this->correctAnswers++;
        }
    }

    public function nextStep(): void
    {
        if ($this->currentStep >= $this->totalSteps) {
            $this->finished = true;
            return;
        }
        $this->currentStep++;
        $this->lastAnswerIndex = null;
        $this->lastAnswerCorrect = null;
        // Auto-close Lerni helper when moving to next question
        $this->showLerni = false;
    }

    public function toggleLerni(): void
    {
        $this->showLerni = ! $this->showLerni;
    }

    public function restart(): void
    {
        $this->currentStep = 1;
        $this->finished = false;
        $this->correctAnswers = 0;
        $this->lastAnswerIndex = null;
        $this->lastAnswerCorrect = null;
        $this->showLerni = false;
    }

    protected function findTask(string $slug): ?array
    {
        return collect(config('tasks', []))->firstWhere('slug', $slug);
    }

    public function render(): View
    {
        return view('livewire.tasks.run');
    }
}