<?php
/**
 * GET /api/student/me
 * Liefert Profil der eingeloggten Schüler*in.
 */

declare(strict_types=1);
require_once __DIR__ . '/../../bootstrap.php';

v2_validate_method('GET');
$auth = v2_auth_require('student');
$studentId = (int) ($auth['sub'] ?? 0);

$row = v2_db_one("
    SELECT
        s.id,
        s.username,
        s.display_name,
        s.avatar_slug,
        s.easy_language,
        s.high_contrast,
        s.reduced_motion,
        s.screen_reader,
        s.text_scale,
        s.locale_pref,
        s.country_pref,
        s.nachteilsausgleich,
        s.class_id,
        c.name AS class_name,
        t.school_name AS school_name
    FROM students s
    LEFT JOIN classes c ON c.id = s.class_id
    LEFT JOIN teachers t ON t.id = c.teacher_id
    WHERE s.id = :id
", [':id' => $studentId]);

if (!$row) {
    v2_response_error(404, 'not_found', 'Schüler*in nicht gefunden.');
}

$locale = $row['locale_pref']
    ?? (($row['easy_language'] ?? false) ? 'de-AT-easy' : 'de-AT-standard');

// Level-Unlocks für alle Module dieser Schüler*in
$unlocks = v2_db_all("
    SELECT module_slug, highest_unlocked_level, highest_completed_level,
           best_score_per_level, attempts_per_level
    FROM student_level_unlock_v2
    WHERE student_id = :id
", [':id' => $studentId]);
$levelUnlocks = [];
foreach ($unlocks as $u) {
    $levelUnlocks[$u['module_slug']] = [
        'highestUnlocked' => $u['highest_unlocked_level'],
        'highestCompleted' => $u['highest_completed_level'],
        'bestScorePerLevel' => $u['best_score_per_level']
            ? json_decode($u['best_score_per_level'], true) : null,
        'attemptsPerLevel' => $u['attempts_per_level']
            ? json_decode($u['attempts_per_level'], true) : null,
    ];
}

v2_response_ok([
    'studentId' => (int) $row['id'],
    'displayName' => $row['display_name'] ?? $row['username'],
    'avatarSlug' => $row['avatar_slug'] ?? 'fuchs-explorer',
    'avatarUrl' => V2_BASE_URL . '/assets/avatars/avatar-' . ($row['avatar_slug'] ?? 'fuchs-explorer') . '.png',
    'easyLanguage' => (bool) ($row['easy_language'] ?? false),
    'locale' => $locale,
    'country' => $row['country_pref'] ?? 'AT',
    'nachteilsausgleich' => (bool) ($row['nachteilsausgleich'] ?? false),
    'classId' => (int) $row['class_id'],
    'className' => $row['class_name'] ?? '',
    'schoolName' => $row['school_name'] ?? '',
    'preferences' => [
        'soundOn' => true,
        'musicOn' => false,
        'highContrast' => (bool) ($row['high_contrast'] ?? false),
        'reducedMotion' => (bool) ($row['reduced_motion'] ?? false),
        'screenReader' => (bool) ($row['screen_reader'] ?? false),
        'textScale' => $row['text_scale'] ?? 'normal',
    ],
    'levelUnlocks' => $levelUnlocks,
]);