<?php

namespace App\Http\Controllers;

use App\Models\Correction;
use App\Models\RenduDevoir;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Auth;
use Illuminate\View\View;

/**
 * « Mes notes » (séparation vitrine/application, 2026-10-13) : notes des
 * devoirs maison et des labs, groupées par compétence quand le lab en a
 * (lab.yaml, jamais lu jusqu'ici). « Sans compétence associée » sinon —
 * jamais de taux inventé.
 */
class MesNotesController extends Controller
{
    public function show(): View
    {
        $eleve = Auth::guard('eleve')->user();

        $notesDevoirs = RenduDevoir::where('eleve_id', $eleve->id)
            ->whereNotNull('note')
            ->with('devoir')
            ->get()
            ->map(fn (RenduDevoir $r) => [
                'titre' => $r->devoir->titre,
                'note' => (int) $r->note,
                'note_max' => 20,
                'competences' => [],
            ]);

        $notesLabs = Correction::whereHas('labSession', fn ($q) => $q->where('eleve_id', $eleve->id))
            ->with('labSession.lab')
            ->get()
            ->map(fn (Correction $c) => [
                'titre' => $c->labSession->lab->titre,
                'note' => $c->note,
                'note_max' => $c->note_max,
                'competences' => $c->labSession->lab->competences ?? [],
            ]);

        $notes = $notesDevoirs->concat($notesLabs);

        return view('mes-notes', ['notes' => $notes, 'parCompetence' => $this->grouperParCompetence($notes)]);
    }

    /**
     * @param  Collection<int, array{titre: string, note: int, note_max: int, competences: array<int, string>}>  $notes
     * @return Collection<string, array{moyenne: int, nombre: int}>
     */
    private function grouperParCompetence(Collection $notes): Collection
    {
        $parCompetence = [];

        foreach ($notes as $note) {
            $competences = $note['competences'] ?: ['Sans compétence associée'];
            $taux = $note['note_max'] > 0 ? $note['note'] / $note['note_max'] * 100 : 0;

            foreach ($competences as $competence) {
                $parCompetence[$competence][] = $taux;
            }
        }

        return collect($parCompetence)->map(fn (array $taux) => [
            'moyenne' => (int) round(array_sum($taux) / count($taux)),
            'nombre' => count($taux),
        ]);
    }
}