[CmdletBinding()]
param(
    [string[]]$SourceRoots = @((Join-Path (Split-Path -Parent $PSScriptRoot) 'src/main/java')),
    [double]$MinimumPercent = 20,
    [switch]$Detailed
)
$ErrorActionPreference = 'Stop'
$rows = foreach ($root in $SourceRoots) {
    foreach ($file in Get-ChildItem -LiteralPath $root -Filter '*.java' -File -Recurse) {
        $lines = [IO.File]::ReadAllLines($file.FullName)
        $nonEmpty = @($lines | Where-Object { $_.Trim().Length -gt 0 })
        $comments = @($nonEmpty | Where-Object { $_ -match '^\s*(//|/\*|\*|\*/)' })
        [pscustomobject]@{
            File = $file.FullName
            NonEmpty = $nonEmpty.Count
            CommentLines = $comments.Count
            Percent = if ($nonEmpty.Count) { [Math]::Round(100.0 * $comments.Count / $nonEmpty.Count, 2) } else { 0 }
        }
    }
}
$total = ($rows | Measure-Object NonEmpty -Sum).Sum
$commentTotal = ($rows | Measure-Object CommentLines -Sum).Sum
$percent = if ($total) { 100.0 * $commentTotal / $total } else { 0 }
if ($Detailed) { $rows | Format-Table -AutoSize }
Write-Output ('Java 注释占比：{0:N2}%（{1} 注释行 / {2} 非空源码行）' -f $percent, $commentTotal, $total)
if ($percent -lt $MinimumPercent) { throw ('尚未达到约定的 {0}% 注释行要求。' -f $MinimumPercent) }