<?php
define('MSZ_USER_AVATAR_FORMAT', '%d.msz');

function user_avatar_delete(int $userId): void
{
    $avatarFileName = sprintf(MSZ_USER_AVATAR_FORMAT, $userId);

    $deleteThis = [
        MSZ_STORAGE . '/avatars/original/' . $avatarFileName,
        MSZ_STORAGE . '/avatars/200x200/' . $avatarFileName,
    ];

    foreach ($deleteThis as $deleteAvatar) {
        safe_delete($deleteAvatar);
    }
}

define('MSZ_USER_AVATAR_TYPE_PNG', IMAGETYPE_PNG);
define('MSZ_USER_AVATAR_TYPE_JPG', IMAGETYPE_JPEG);
define('MSZ_USER_AVATAR_TYPE_GIF', IMAGETYPE_GIF);
define('MSZ_USER_AVATAR_TYPES', [
    MSZ_USER_AVATAR_TYPE_PNG,
    MSZ_USER_AVATAR_TYPE_JPG,
    MSZ_USER_AVATAR_TYPE_GIF,
]);

function user_avatar_is_allowed_type(int $type): bool
{
    return in_array($type, MSZ_USER_AVATAR_TYPES, true);
}

define('MSZ_USER_AVATAR_OPTIONS', [
    'max_width' => 1000,
    'max_height' => 1000,
    'max_size' => 500000,
]);

function user_avatar_default_options(): array
{
    return array_merge(MSZ_USER_AVATAR_OPTIONS, config_get_default([], 'Avatar'));
}

define('MSZ_USER_AVATAR_NO_ERRORS', 0);
define('MSZ_USER_AVATAR_ERROR_INVALID_IMAGE', 1);
define('MSZ_USER_AVATAR_ERROR_PROHIBITED_TYPE', 2);
define('MSZ_USER_AVATAR_ERROR_DIMENSIONS_TOO_LARGE', 3);
define('MSZ_USER_AVATAR_ERROR_DATA_TOO_LARGE', 4);
define('MSZ_USER_AVATAR_ERROR_TMP_FAILED', 5);
define('MSZ_USER_AVATAR_ERROR_STORE_FAILED', 6);
define('MSZ_USER_AVATAR_ERROR_FILE_NOT_FOUND', 7);

function user_avatar_set_from_path(int $userId, string $path, array $options = []): int
{
    if (!file_exists($path)) {
        return MSZ_USER_AVATAR_ERROR_FILE_NOT_FOUND;
    }

    $options = array_merge(MSZ_USER_AVATAR_OPTIONS, $options);

    // 0 => width, 1 => height, 2 => type
    $imageInfo = getimagesize($path);

    if ($imageInfo === false
        || count($imageInfo) < 3
        || $imageInfo[0] < 1
        || $imageInfo[1] < 1) {
        return MSZ_USER_AVATAR_ERROR_INVALID_IMAGE;
    }

    if (!user_avatar_is_allowed_type($imageInfo[2])) {
        return MSZ_USER_AVATAR_ERROR_PROHIBITED_TYPE;
    }

    if ($imageInfo[0] > $options['max_width']
        || $imageInfo[1] > $options['max_height']) {
        return MSZ_USER_AVATAR_ERROR_DIMENSIONS_TOO_LARGE;
    }

    if (filesize($path) > $options['max_size']) {
        return MSZ_USER_AVATAR_ERROR_DATA_TOO_LARGE;
    }

    user_avatar_delete($userId);

    $fileName = sprintf(MSZ_USER_AVATAR_FORMAT, $userId);
    $storageDir = MSZ_STORAGE . '/avatars/original';
    mkdirs($storageDir, true);
    $avatarPath = "{$storageDir}/{$fileName}";

    if (!copy($path, $avatarPath)) {
        return MSZ_USER_AVATAR_ERROR_STORE_FAILED;
    }

    return MSZ_USER_AVATAR_NO_ERRORS;
}

function user_avatar_set_from_data(int $userId, string $data, array $options = []): int
{
    $tmp = tempnam(sys_get_temp_dir(), 'msz');

    if ($tmp === false || !file_exists($tmp)) {
        return MSZ_USER_AVATAR_ERROR_TMP_FAILED;
    }

    chmod($tmp, 644);
    file_put_contents($tmp, $data);
    $result = user_avatar_set_from_path($userId, $tmp, $options);
    safe_delete($tmp);

    return $result;
}