<?php
include('include/headscript.php');
$lang = $_SESSION['langselect'] ?? 'it';

$messages = [
    'it' => [
        'missing_trf' => 'ID TRF mancante.',
        'no_image' => 'Nessuna immagine selezionata.',
        'upload_error' => 'Errore durante il caricamento.',
        'too_large' => 'Immagine troppo grande. Dimensione massima consentita: 8 MB.',
        'invalid_extension' => 'Estensione non valida. Sono consentiti solo JPG, JPEG e PNG.',
        'invalid_type' => 'Tipo immagine non valido. Sono consentiti solo JPG, JPEG e PNG.',
        'invalid_image' => 'File immagine non valido.',
        'unsupported_type' => 'Tipo immagine non supportato.',
        'process_error' => 'Impossibile elaborare l’immagine.',
        'save_error' => 'Impossibile salvare l’immagine ridimensionata.'
    ],
    'en' => [
        'missing_trf' => 'Missing TRF ID.',
        'no_image' => 'No image selected.',
        'upload_error' => 'Upload error.',
        'too_large' => 'Image too large. Maximum allowed size is 8 MB.',
        'invalid_extension' => 'Invalid file extension. Only JPG, JPEG and PNG are allowed.',
        'invalid_type' => 'Invalid image type. Only JPG, JPEG and PNG are allowed.',
        'invalid_image' => 'Invalid image file.',
        'unsupported_type' => 'Unsupported image type.',
        'process_error' => 'Unable to process image.',
        'save_error' => 'Unable to save resized image.'
    ]
];

$msg = $messages[$lang] ?? $messages['it'];
ini_set('display_errors', 0);
error_reporting(E_ALL);

// =======================
// Upload settings
// =======================
$targetDir = "uploadimages/";
$targetDirPath = __DIR__ . "/uploadimages/";

$maxUploadSize = 8 * 1024 * 1024; // 8 MB
$maxWidth = 1600;
$maxHeight = 1600;
$jpgQuality = 82;

$allowedExtensions = ['jpg', 'jpeg', 'png'];
$allowedMimeTypes = ['image/jpeg', 'image/png'];

// =======================
// Basic checks
// =======================
if (empty($_POST["idtrf"])) {
    http_response_code(400);
    echo $msg['missing_trf'];
    exit;
}

$idtrf = intval($_POST["idtrf"]);

if (empty($_FILES['images']) || empty($_FILES['images']['name'][0])) {
    http_response_code(400);
    echo $msg['no_image'];
    exit;
}

if (!is_dir($targetDirPath)) {
    mkdir($targetDirPath, 0755, true);
}

// We use only the first image, as this page manages the main TRF photo
$key = 0;

$imageName = $_FILES['images']['name'][$key];
$tmpName   = $_FILES['images']['tmp_name'][$key];
$size      = $_FILES['images']['size'][$key];
$error     = $_FILES['images']['error'][$key];

if ($error !== UPLOAD_ERR_OK) {
    http_response_code(400);
    echo $msg['upload_error'];
    exit;
}

if ($size > $maxUploadSize) {
    http_response_code(400);
    echo $msg['too_large'];
    exit;
}

// =======================
// Extension check
// =======================
$extension = strtolower(pathinfo($imageName, PATHINFO_EXTENSION));

if (!in_array($extension, $allowedExtensions)) {
    http_response_code(400);
    echo $msg['invalid_extension'];
    exit;
}

// =======================
// Real MIME check
// =======================
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mimeType = finfo_file($finfo, $tmpName);
finfo_close($finfo);

if (!in_array($mimeType, $allowedMimeTypes)) {
    http_response_code(400);
    echo $msg['invalid_type'];
    exit;
}

// =======================
// Image validation
// =======================
$imageInfo = getimagesize($tmpName);

if ($imageInfo === false) {
    http_response_code(400);
    echo $msg['invalid_image'];
    exit;
}

$originalWidth = $imageInfo[0];
$originalHeight = $imageInfo[1];

// =======================
// Create source image
// =======================
if ($mimeType === 'image/jpeg') {
    $sourceImage = imagecreatefromjpeg($tmpName);
} elseif ($mimeType === 'image/png') {
    $sourceImage = imagecreatefrompng($tmpName);
} else {
    http_response_code(400);
    echo $msg['unsupported_type'];
    exit;
}

if (!$sourceImage) {
    http_response_code(400);
    echo $msg['process_error'];
    exit;
}

// =======================
// Resize calculation
// =======================
$ratio = min($maxWidth / $originalWidth, $maxHeight / $originalHeight, 1);

$newWidth = (int)($originalWidth * $ratio);
$newHeight = (int)($originalHeight * $ratio);

// =======================
// Create resized image
// =======================
$resizedImage = imagecreatetruecolor($newWidth, $newHeight);

// White background for PNG transparency
$white = imagecolorallocate($resizedImage, 255, 255, 255);
imagefill($resizedImage, 0, 0, $white);

imagecopyresampled(
    $resizedImage,
    $sourceImage,
    0,
    0,
    0,
    0,
    $newWidth,
    $newHeight,
    $originalWidth,
    $originalHeight
);

// =======================
// New filename
// =======================
$code = time();
$fileName = $idtrf . '-' . $code . '.jpg';
$targetFilePath = $targetDirPath . $fileName;

// =======================
// Save as JPG
// =======================
$saved = imagejpeg($resizedImage, $targetFilePath, $jpgQuality);

imagedestroy($sourceImage);
imagedestroy($resizedImage);

if (!$saved || !file_exists($targetFilePath)) {
    http_response_code(500);
    echo $msg['save_error'];
    exit;
}

// =======================
// Delete previous photo if exists
// =======================
$oldPhoto = "";

$oldPhotoQuery = new WA_MySQLi_RS("oldPhotoQuery", $cmctrfdb, 1);
$oldPhotoQuery->setQuery("SELECT photofilename FROM `trf-details` WHERE idtrfdetails = $idtrf");
$oldPhotoQuery->execute();

$oldPhoto = $oldPhotoQuery->getColumnVal("photofilename");

if (!empty($oldPhoto)) {
    $oldPhotoPath = $targetDirPath . basename($oldPhoto);

    if (file_exists($oldPhotoPath) && $oldPhoto !== $fileName) {
        unlink($oldPhotoPath);
    }
}

// =======================
// Update database
// =======================
$UpdateQuery = new WA_MySQLi_Query($cmctrfdb);
$UpdateQuery->Action = "update";
$UpdateQuery->Table = "`trf-details`";
$UpdateQuery->bindColumn("photofilename", "s", "$fileName", "WA_DEFAULT");
$UpdateQuery->addFilter("idtrfdetails", "=", "i", "" . ($idtrf) . "");
$UpdateQuery->execute();

// Important: no redirect here because this is an AJAX upload

// =======================
// Return gallery HTML
// =======================
?>
<img src="<?php echo $targetDir . htmlspecialchars($fileName); ?>" alt="" class="uploaded-preview">