<?php

require_once __DIR__ . '/auth_check.php';

mnt_require_permission('maintenance.manage');

try {
    $pdo = mnt_pdo();

    $id = (int)($_POST['id'] ?? 0);

    if ($id <= 0) {
        mnt_json_fail('ID non valido.');
    }

    $stmt = $pdo->prepare("SELECT id, equipment_id, title FROM maint_maintenances WHERE id = ?");
    $stmt->execute([$id]);
    $maintenance = $stmt->fetch(PDO::FETCH_ASSOC);

    if (!$maintenance) {
        mnt_json_fail('Manutenzione non trovata.');
    }

    // Files of the maintenance and of its interventions (both cascade in DB)
    $stmt = $pdo->prepare("SELECT stored_name FROM maint_maintenance_files WHERE maintenance_id = ?");
    $stmt->execute([$id]);
    $storedNames = $stmt->fetchAll(PDO::FETCH_COLUMN);

    $stmt = $pdo->prepare("
        SELECT f.stored_name
        FROM maint_intervention_files f
        INNER JOIN maint_interventions i ON i.id = f.intervention_id
        WHERE i.maintenance_id = ?
    ");
    $stmt->execute([$id]);
    $storedNames = array_merge($storedNames, $stmt->fetchAll(PDO::FETCH_COLUMN));

    $stmt = $pdo->prepare("SELECT signature_path FROM maint_interventions WHERE maintenance_id = ? AND signature_path IS NOT NULL");
    $stmt->execute([$id]);
    $storedNames = array_merge($storedNames, $stmt->fetchAll(PDO::FETCH_COLUMN));

    $pdo->prepare("DELETE FROM maint_maintenances WHERE id = ?")->execute([$id]);

    foreach (array_filter($storedNames) as $storedName) {
        mnt_delete_stored_file($storedName);
    }

    mnt_log($pdo, 'maintenance_deleted', (int)$maintenance['equipment_id'], null, null, $currentUserId, null, $maintenance['title']);

    mnt_json_ok();
} catch (Throwable $e) {
    mnt_json_fail('Errore: ' . $e->getMessage());
}