<?php
require_once(__DIR__ . '/auth_check.php');
header('Content-Type: application/json');
require_once(__DIR__ . '/../../class/db-functions.php');

try {
    if (!isset($_GET['id']) || !is_numeric($_GET['id'])) {
        echo json_encode(['success' => false, 'message' => 'ID non valido.']);
        exit;
    }

    $id = (int)$_GET['id'];
    $db = DBHandlerSelect::getInstance();
    $pdo = $db->getConnection();

    $stmt = $pdo->prepare("SELECT * FROM scad_deadlines WHERE id = ?");
    $stmt->execute([$id]);
    $deadline = $stmt->fetch(PDO::FETCH_ASSOC);

    if (!$deadline) {
        echo json_encode(['success' => false, 'message' => 'Scadenza non trovata.']);
        exit;
    }

    // Get assigned employee IDs
    $empStmt = $pdo->prepare("SELECT employee_id FROM scad_deadline_employee WHERE deadline_id = ?");
    $empStmt->execute([$id]);
    $deadline['employee_ids'] = $empStmt->fetchAll(PDO::FETCH_COLUMN);

    // Parse departments into array
    $deadline['department_names'] = [];
    if (!empty($deadline['departments'])) {
        $deadline['department_names'] = array_map('trim', explode(',', $deadline['departments']));
    }

    // Get attachments
    $attStmt = $pdo->prepare("SELECT id, original_name, mime_type, size, created_at FROM scad_deadline_attachments WHERE deadline_id = ? ORDER BY created_at DESC");
    $attStmt->execute([$id]);
    $deadline['attachments'] = $attStmt->fetchAll(PDO::FETCH_ASSOC);

    echo json_encode(['success' => true, 'data' => $deadline]);

} catch (Exception $e) {
    echo json_encode(['success' => false, 'message' => 'Errore: ' . $e->getMessage()]);
}