[CmdletBinding()]
param([string]$PxhjRoot = 'E:\pxhj')
$ErrorActionPreference = 'Stop'
$projectRoot = [IO.Path]::GetFullPath((Join-Path $PSScriptRoot '..'))
$staging = Join-Path $projectRoot 'runtime/console-pxhj-staging'
$manifest = Get-Content -LiteralPath (Join-Path $staging 'baseline-manifest.json') -Raw | ConvertFrom-Json
$targetRoot = [IO.Path]::GetFullPath($PxhjRoot).TrimEnd('\')
$backupRoot = Join-Path $projectRoot ('runtime/console-bridge-backup-' + (Get-Date -Format 'yyyyMMdd-HHmmss'))
foreach ($entry in $manifest.files) {
    $target = [IO.Path]::GetFullPath((Join-Path $targetRoot $entry.path))
    if (-not $target.StartsWith($targetRoot + '\', [StringComparison]::OrdinalIgnoreCase)) { throw '补丁路径超出目标项目。' }
    $staged = Join-Path $staging $entry.path
    if ((Get-FileHash -LiteralPath $staged -Algorithm SHA256).Hash -ne $entry.sha256) { throw ('补丁文件校验失败：' + $entry.path) }
    if (Test-Path -LiteralPath $target) {
        $currentHash = (Get-FileHash -LiteralPath $target -Algorithm SHA256).Hash
        $baseline = @($manifest.modifiedBaseline | Where-Object path -eq $entry.path)
        if ($currentHash -ne $entry.sha256 -and ($baseline.Count -eq 0 -or $currentHash -ne $baseline[0].sha256)) { throw ('目标文件已变化，未覆盖：' + $entry.path) }
    }
}
foreach ($entry in $manifest.files) {
    $target = Join-Path $targetRoot $entry.path
    if (Test-Path -LiteralPath $target) {
        $backup = Join-Path $backupRoot $entry.path
        New-Item -ItemType Directory -Force -Path (Split-Path -Parent $backup) | Out-Null
        Copy-Item -LiteralPath $target -Destination $backup
    }
    New-Item -ItemType Directory -Force -Path (Split-Path -Parent $target) | Out-Null
    Copy-Item -LiteralPath (Join-Path $staging $entry.path) -Destination $target
}
Write-Output ('采集桥接源码已应用。备份目录：' + $backupRoot)
Write-Output '运行中的后端不会自动加载新源码。'