<?php

declare(strict_types=1);

// Shared entry point for every server-side script. Loads config.php, fills in
// defaults for all MANAGE_* constants, and pulls in the low-level helpers.
// Deliberately does not start a session: the API endpoints are stateless and
// only the admin pages call manageStartSession().

$manageConfigFile = dirname(__DIR__) . "/config.php";
if (is_file($manageConfigFile)) {
    require_once $manageConfigFile;
}

if (!defined("MANAGE_PRODUCT_NAME")) {
    define("MANAGE_PRODUCT_NAME", "Managed Application");
}
if (!defined("MANAGE_PACKAGE_PREFIX")) {
    define("MANAGE_PACKAGE_PREFIX", "release");
}
if (!defined("MANAGE_PUBLIC_URL")) {
    define("MANAGE_PUBLIC_URL", "");
}
if (!defined("MANAGE_STORAGE_DIR")) {
    define("MANAGE_STORAGE_DIR", dirname(__DIR__) . "/storage/");
}
if (!defined("MANAGE_BACKUP_RETENTION")) {
    define("MANAGE_BACKUP_RETENTION", 30);
}
if (!defined("MANAGE_BACKUP_MAX_UPLOAD_BYTES")) {
    define("MANAGE_BACKUP_MAX_UPLOAD_BYTES", 0);
}
if (!defined("MANAGE_S3_ENABLED")) {
    define("MANAGE_S3_ENABLED", false);
}
if (!defined("MANAGE_S3_ENDPOINT")) {
    define("MANAGE_S3_ENDPOINT", "");
}
if (!defined("MANAGE_S3_REGION")) {
    define("MANAGE_S3_REGION", "");
}
if (!defined("MANAGE_S3_BUCKET")) {
    define("MANAGE_S3_BUCKET", "");
}
if (!defined("MANAGE_S3_PREFIX")) {
    define("MANAGE_S3_PREFIX", "");
}
if (!defined("MANAGE_S3_ACCESS_KEY")) {
    define("MANAGE_S3_ACCESS_KEY", "");
}
if (!defined("MANAGE_S3_SECRET_KEY")) {
    define("MANAGE_S3_SECRET_KEY", "");
}
if (!defined("MANAGE_S3_PATH_STYLE")) {
    define("MANAGE_S3_PATH_STYLE", false);
}
if (!defined("MANAGE_S3_TIMEOUT")) {
    define("MANAGE_S3_TIMEOUT", 120);
}
if (!defined("MANAGE_S3_RETENTION")) {
    define("MANAGE_S3_RETENTION", 365);
}
if (!defined("MANAGE_LOGIN_RATE_LIMIT_MAX")) {
    define("MANAGE_LOGIN_RATE_LIMIT_MAX", 10);
}
if (!defined("MANAGE_LOGIN_RATE_LIMIT_WINDOW")) {
    define("MANAGE_LOGIN_RATE_LIMIT_WINDOW", 900);
}
if (!defined("MANAGE_API_RATE_LIMIT_MAX")) {
    define("MANAGE_API_RATE_LIMIT_MAX", 240);
}
if (!defined("MANAGE_API_RATE_LIMIT_WINDOW")) {
    define("MANAGE_API_RATE_LIMIT_WINDOW", 300);
}
if (!defined("MANAGE_LOG_MAX_BYTES")) {
    define("MANAGE_LOG_MAX_BYTES", 1048576);
}
if (!defined("MANAGE_LOG_KEEP_FILES")) {
    define("MANAGE_LOG_KEEP_FILES", 5);
}
if (!defined("MANAGE_LOG_MAX_AGE_SECONDS")) {
    define("MANAGE_LOG_MAX_AGE_SECONDS", 2592000);
}

// Derived storage paths. Kept as functions rather than constants so a config
// may override MANAGE_STORAGE_DIR without having to restate every child path.
function manageStorageDir(): string
{
    return rtrim((string) MANAGE_STORAGE_DIR, "/\\") . DIRECTORY_SEPARATOR;
}

function manageInstancesFile(): string
{
    return manageStorageDir() . "instances.json";
}

function manageSettingsFile(): string
{
    return manageStorageDir() . "settings.json";
}

function manageReleasesDir(): string
{
    return manageStorageDir() . "releases" . DIRECTORY_SEPARATOR;
}

function manageManifestFile(): string
{
    return manageReleasesDir() . "manifest.json";
}

function managePackagesDir(): string
{
    return manageReleasesDir() . "packages" . DIRECTORY_SEPARATOR;
}

function manageBackupsDir(): string
{
    return manageStorageDir() . "backups" . DIRECTORY_SEPARATOR;
}

function manageBackupIndexFile(): string
{
    return manageBackupsDir() . "index.json";
}

function manageLogsDir(): string
{
    return manageStorageDir() . "logs" . DIRECTORY_SEPARATOR;
}

function manageS3LogFile(): string
{
    return manageLogsDir() . "s3.log";
}

function manageProductName(): string
{
    $name = trim((string) MANAGE_PRODUCT_NAME);

    return $name !== "" ? $name : "Managed Application";
}

function manageEscape($value): string
{
    return htmlspecialchars((string) $value, ENT_QUOTES | ENT_SUBSTITUTE, "UTF-8");
}

function manageIsVersion(string $version): bool
{
    return preg_match('/^v\d+\.\d+\.\d+$/', $version) === 1;
}

function manageFormatBytes(int $bytes): string
{
    if ($bytes >= 1073741824) {
        return number_format($bytes / 1073741824, 2, ",", ".") . " GB";
    }
    if ($bytes >= 1048576) {
        return number_format($bytes / 1048576, 2, ",", ".") . " MB";
    }
    if ($bytes >= 1024) {
        return number_format($bytes / 1024, 1, ",", ".") . " KB";
    }

    return $bytes . " B";
}

require_once __DIR__ . "/storage.php";
require_once __DIR__ . "/log.php";
require_once __DIR__ . "/ratelimit.php";