# 全局作用域演示
$global:config = 'Server1'
function Show-Config {
    Write-Host "全局配置: $global:config"
}

# 本地作用域示例
function Set-LocalValue {
    $local:temp = '临时数据'
    Write-Host "函数内部值: $temp"
}

# 脚本作用域应用
$script:counter = 0
function Increment-Counter {
    $script:counter++
    Write-Host "当前计数: $script:counter"
}

# 跨作用域调用演示
Show-Config
Set-LocalValue
Increment-Counter
Increment-Counter

# 使用Get-Variable跨作用域访问
function Get-RemoteValue {
    param($varName)
    Get-Variable -Name $varName -Scope 1 -ValueOnly
}

$outerVar = '外层数据'
function Show-Nested {
    $innerVar = '内部数据'
    Write-Host "穿透获取: $(Get-RemoteValue 'outerVar')"
}

$globalVar = 'Global'

function Show-Scope {
    begin {
        $beginVar = 'Begin块变量'
        Write-Host "Begin块访问全局变量: $globalVar"
    }
    process {
        $processVar = 'Process块变量'
        Write-Host "Process块继承Begin变量: $beginVar"
        Write-Host "无法访问Process后续块变量"
    }
    end {
        Write-Host "End块访问Process变量: $processVar"
        $global:newGlobalVar = '新建全局变量'
    }
}

# 执行验证
1..3 | Show-Scope
Write-Host "全局访问新建变量: $newGlobalVar"

$global:counter = 10  # 全局作用域

function Show-Count {
    $script:total = 20  # 脚本作用域
    $local:temp = 5    # 局部作用域
    $global:counter + $script:total + $local:temp
}

# 使用Get-Variable跨作用域访问
Get-Variable counter -Scope Global

# 使用Set-Variable修改父作用域
function Update-Count {
    Set-Variable -Name counter -Value 15 -Scope 1
}