<?php
/**
 * app/modules/floors/save.php
 *
 * Speichert / aktualisiert ein Stockwerk
 */

// Nur POST
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    header('Location: ?module=floors&action=list');
    exit;
}

// =========================
// Daten einlesen
// =========================
$floorId = (int)($_POST['id'] ?? 0);
$name = trim($_POST['name'] ?? '');
$buildingId = (int)($_POST['building_id'] ?? 0);
$level = isset($_POST['level']) ? (int)$_POST['level'] : null;
$comment = trim($_POST['comment'] ?? '');
$floorSvgContent = trim($_POST['floor_svg_content'] ?? '');

// =========================
// Validierung
// =========================
$errors = [];

if (empty($name)) {
    $errors[] = "Name ist erforderlich";
}

if ($buildingId <= 0) {
    $errors[] = "Gebäude ist erforderlich";
}

// Falls Fehler: zurück zum Edit-Formular
if (!empty($errors)) {
    $_SESSION['error'] = implode(', ', $errors);
    $_SESSION['validation_errors'] = $errors;
    $redirectUrl = $floorId ? "?module=floors&action=edit&id=$floorId" : "?module=floors&action=edit";
    header("Location: $redirectUrl");
    exit;
}

// =========================
// SVG aus Editor verarbeiten (optional)
// =========================
$svgPath = null;
if ($floorSvgContent !== '') {
    $storedSvgPath = storeSvgEditorContent($sql, $floorId, $floorSvgContent);
    if ($storedSvgPath === false) {
        $_SESSION['error'] = "SVG aus dem Editor konnte nicht gespeichert werden";
        $_SESSION['validation_errors'] = ["SVG aus dem Editor konnte nicht gespeichert werden"];
        $redirectUrl = $floorId ? "?module=floors&action=edit&id=$floorId" : "?module=floors&action=edit";
        header("Location: $redirectUrl");
        exit;
    }
    $svgPath = $storedSvgPath;
}

// =========================
// In DB speichern
// =========================
if ($floorId > 0) {
    // UPDATE
    if ($svgPath) {
        $sql->set(
            "UPDATE floors SET name = ?, building_id = ?, level = ?, comment = ?, svg_path = ? WHERE id = ?",
            "siissi",
            [$name, $buildingId, $level, $comment, $svgPath, $floorId]
        );
    } else {
        $sql->set(
            "UPDATE floors SET name = ?, building_id = ?, level = ?, comment = ? WHERE id = ?",
            "siiss",
            [$name, $buildingId, $level, $comment, $floorId]
        );
    }
} else {
    // INSERT
    $sql->set(
        "INSERT INTO floors (name, building_id, level, comment, svg_path) VALUES (?, ?, ?, ?, ?)",
        "siiss",
        [$name, $buildingId, $level, $comment, $svgPath]
    );
}

$_SESSION['success'] = "Stockwerk gespeichert";

// =========================
// Redirect
// =========================
header('Location: ?module=floors&action=list');
exit;

function storeSvgEditorContent($sql, $floorId, $content)
{
    $normalized = trim($content);
    if ($normalized === '' || stripos($normalized, '<svg') === false) {
        return false;
    }

    $relativePath = null;
    if ($floorId > 0) {
        $existing = $sql->single(
            "SELECT svg_path FROM floors WHERE id = ?",
            "i",
            [$floorId]
        );
        $candidate = trim((string)($existing['svg_path'] ?? ''));
        if ($candidate !== '') {
            $relativePath = ltrim($candidate, "/\\");
        }
    }

    if (!$relativePath) {
        $relativePath = 'uploads/floorplans/' . uniqid('floor_') . '.svg';
    }

    $absolutePath = __DIR__ . '/../../' . $relativePath;
    $targetDir = dirname($absolutePath);
    if (!is_dir($targetDir)) {
        mkdir($targetDir, 0755, true);
    }

    $written = file_put_contents($absolutePath, $normalized);
    if ($written === false) {
        return false;
    }

    return $relativePath;
}