<?php

namespace App\Http\Controllers\Api\V1;

use App\Http\Controllers\Controller;
use App\Models\Lesson;
use App\Services\ProgressTrackingService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class ProgressController extends Controller
{
    public function __construct(private readonly ProgressTrackingService $tracking) {}

    public function heartbeat(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'lesson_id' => ['required', 'integer', 'exists:lessons,id'],
            'position_seconds' => ['required', 'integer', 'min:0'],
        ]);

        /** @var Lesson $lesson */
        $lesson = Lesson::query()->findOrFail($validated['lesson_id']);

        $progress = $this->tracking->heartbeat(
            student: $request->user(),
            lesson: $lesson,
            positionSeconds: (int) $validated['position_seconds'],
        );

        return response()->json([
            'lesson_id' => $lesson->id,
            'watched_percentage' => $progress->watched_percentage,
            'last_position_seconds' => $progress->last_position_seconds,
            'completed' => $progress->completed_at !== null,
        ]);
    }
}