<?php
require_once('include/headscript.php');

/**
 * Salvataggio sede (insert/update) da event_locations.php.
 * Se "predefinita" è spuntata, la imposta come unica default.
 */
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    header('Location: event_locations.php');
    exit();
}

$pdo = DBHandlerSelect::getInstance()->getConnection();

$id      = isset($_POST['id']) ? (int) $_POST['id'] : 0;
$name    = trim($_POST['name'] ?? '');
$address = trim($_POST['address'] ?? '');
$isDefault = (isset($_POST['is_default']) && $_POST['is_default'] === 'Y') ? 'Y' : 'N';

$lat = ($_POST['lat'] ?? '') !== '' ? (float) $_POST['lat'] : null;
$lng = ($_POST['lng'] ?? '') !== '' ? (float) $_POST['lng'] : null;

if ($name === '' || $address === '') {
    header('Location: event_locations.php?message=error');
    exit();
}

try {
    if ($id > 0) {
        $stmt = $pdo->prepare("UPDATE event_locations
                               SET name = :name, address = :address, lat = :lat, lng = :lng,
                                   is_default = :is_default, updated_at = NOW()
                               WHERE id = :id");
        $stmt->execute([
            ':name' => $name,
            ':address' => $address,
            ':lat' => $lat,
            ':lng' => $lng,
            ':is_default' => $isDefault,
            ':id' => $id,
        ]);
        $savedId = $id;
    } else {
        $stmt = $pdo->prepare("INSERT INTO event_locations (name, address, lat, lng, is_default, created_at, updated_at)
                               VALUES (:name, :address, :lat, :lng, :is_default, NOW(), NOW())");
        $stmt->execute([
            ':name' => $name,
            ':address' => $address,
            ':lat' => $lat,
            ':lng' => $lng,
            ':is_default' => $isDefault,
        ]);
        $savedId = (int) $pdo->lastInsertId();
    }

    // Una sola predefinita
    if ($isDefault === 'Y') {
        $pdo->prepare("UPDATE event_locations SET is_default = IF(id = ?, 'Y', 'N'), updated_at = NOW()")->execute([$savedId]);
    }

    header('Location: event_locations.php?message=success');
    exit();
} catch (Throwable $ex) {
    error_log('[event_locations_save] ' . $ex->getMessage());
    header('Location: event_locations.php?message=error');
    exit();
}