# ==========================================
# 🌐 NET UTILS
# ==========================================

# --- CONFIG ---
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

# --- ФУНКЦИИ ---

$script:HwidFile = "C:\Tools\sing-box\hwid"
$script:AppName = "VPN-Proxy-Control by Dokril"

function Get-HWID {
    # Генерация или чтение HWID из файла
    if (Test-Path $script:HwidFile) {
        return (Get-Content $script:HwidFile -Raw).Trim()
    }
    
    # Генерируем новый HWID
    $hwid = [Guid]::NewGuid().ToString("N").Substring(0, 16)
    
    # Сохраняем
    $dir = Split-Path $script:HwidFile -Parent
    if (!(Test-Path $dir)) { New-Item -ItemType Directory -Path $dir -Force | Out-Null }
    Set-Content -Path $script:HwidFile -Value $hwid
    
    return $hwid
}

function Get-SubscriptionHeaders {
    # Формируем заголовки как в server.py
    $osName = "windows"
    $osVersion = [Environment]::OSVersion.Version.ToString()
    
    return @{
        "User-Agent"     = "singbox"
        "x-hwid"         = (Get-HWID)
        "x-device-os"    = $osName
        "x-ver-os"       = $osVersion
        "x-device-model" = $script:AppName
    }
}

function Download-File {
    param(
        [string]$Url,
        [string]$Destination,
        [string]$UserAgent = "VPN-Proxy-Installer"
    )

    try {
        $req = [System.Net.HttpWebRequest]::Create($Url)
        $req.UserAgent = $UserAgent
        $resp = $req.GetResponse()
        
        $stream = $resp.GetResponseStream()
        $fs = [System.IO.File]::Create($Destination)
        $msgLen = $resp.ContentLength
        
        $buffer = New-Object byte[] 10240
        $count = 0
        $total = 0
        
        do {
            $count = $stream.Read($buffer, 0, $buffer.Length)
            $fs.Write($buffer, 0, $count)
            $total += $count
            # Можно добавить прогресс бар, но пока просто качаем
        } while ($count -gt 0)
        
        $fs.Close()
        $stream.Close()
        $resp.Close()
        
        # Unblock file to prevent "Mark of the Web" issues
        Unblock-File -Path $Destination -ErrorAction SilentlyContinue
        
        return $true
    }
    catch {
        Write-Error "Ошибка скачивания: $_"
        return $false
    }
}


function Get-SubscriptionData {
    param(
        [string]$Url,
        [string]$UserAgent = "singbox",
        $Headers = @{}
    )
    
    Write-Info "Загружаю подписку..."
    
    $rawContent = $null
    $userInfo = @{}
    
    # 1. Получаем ответ
    try {
        $response = Invoke-WebRequest -Uri $Url -Headers $Headers -TimeoutSec 15 -UseBasicParsing
        $rawContent = $response.Content
        
        # Парсим subscription-userinfo header
        $userInfoHeader = $response.Headers["subscription-userinfo"]
        if ($userInfoHeader) {
            $parts = $userInfoHeader -split ";"
            foreach ($part in $parts) {
                if ($part -match "(\w+)=(\d+)") {
                    $userInfo[$matches[1]] = [int64]$matches[2]
                }
            }
        }
    }
    catch {
        return @{
            success    = $false
            error      = "Ошибка загрузки: $($_.Exception.Message)"
            rawContent = $null
        }
    }
    
    # 2. Пробуем парсить как JSON
    try {
        $config = $rawContent | ConvertFrom-Json
        return @{
            success    = $true
            config     = $config
            rawContent = $rawContent
            userInfo   = $userInfo
        }
    }
    catch {
        # JSON не распарсился — возвращаем rawContent для дальнейшей обработки
        return @{
            success    = $false
            error      = "Ответ не в формате JSON (возможно Base64 или список ссылок)"
            rawContent = $rawContent
            userInfo   = $userInfo
        }
    }
}