param(
    [Parameter(Mandatory=$true)]
    [string]$Source,

    [Parameter(Mandatory=$true)]
    [string]$Destination
)

try {
    # 1. 路径预处理：展开环境变量 (例如把 $env:APPDATA 变成 C:\Users\...\AppData\Roaming)
    $ResolvedSource = $ExecutionContext.InvokeCommand.ExpandString($Source)
    $ResolvedDest   = $ExecutionContext.InvokeCommand.ExpandString($Destination)

    # 2. 处理相对路径 (针对源文件)
    # 如果源路径是相对路径 (./assets/...), 尝试将其转换为绝对路径
    # 假设脚本是从项目根目录调用的
    if (-not (Test-Path $ResolvedSource) -and (Test-Path "$PWD\$ResolvedSource")) {
        $ResolvedSource = Join-Path $PWD $ResolvedSource
    }

    # 3. 再次检查源文件是否存在
    if (-not (Test-Path $ResolvedSource -PathType Leaf)) {
        Write-Warning "`n[FileCopy] [Skip] File not found: $ResolvedSource"
        return # 退出脚本
    }

    # 4. 处理目标目录 (自动创建不存在的文件夹)
    $DestDir = Split-Path -Path $ResolvedDest -Parent
    if (-not (Test-Path $DestDir)) {
        Write-Host "`n[FileCopy] Create dir: $DestDir" -ForegroundColor DarkGray
        New-Item -Path $DestDir -ItemType Directory -Force | Out-Null
    }

    # 5. 执行复制 (Force = 覆盖)
    Copy-Item -Path $ResolvedSource -Destination $ResolvedDest -Force -ErrorAction Stop
    
    Write-Host "`n[FileCopy] Success: $ResolvedDest" -ForegroundColor Green

} catch {
    Write-Error "`n[FileCopy] Fail: $_"
}