param(
    [string]$Version = '0.76.0-rc.hardware1',
    [string]$OutputDirectory = '.deploy-artifacts'
)

$ErrorActionPreference = 'Stop'
$PSNativeCommandUseErrorActionPreference = $true

$projectRoot = (Resolve-Path -LiteralPath (Split-Path -Parent $PSScriptRoot)).Path
$outputRoot = [IO.Path]::GetFullPath((Join-Path $projectRoot $OutputDirectory))
if (-not $outputRoot.StartsWith($projectRoot + [IO.Path]::DirectorySeparatorChar, [StringComparison]::OrdinalIgnoreCase)) {
    throw 'OutputDirectory must resolve inside the project workspace'
}
if ($Version -notmatch '^[0-9A-Za-z][0-9A-Za-z._-]{0,79}$') {
    throw 'Version contains unsupported characters'
}

New-Item -ItemType Directory -Force -Path $outputRoot | Out-Null
$bundleName = "data-terminal-cloud-$Version"
$stagingRoot = Join-Path $outputRoot ('.staging-' + [Guid]::NewGuid().ToString('N'))
$payloadRoot = Join-Path $stagingRoot $bundleName
New-Item -ItemType Directory -Force -Path $payloadRoot | Out-Null

try {
    $candidatePaths = @(& git -c core.quotePath=false ls-files --cached --others --exclude-standard -- `
        cmd internal migrations openapi web deploy scripts test docs compose.yaml go.mod go.sum README.md CHANGELOG.md .env.example .dockerignore)
    if ($LASTEXITCODE -ne 0) { throw 'git file enumeration failed' }
    $candidatePaths = $candidatePaths | Where-Object {
        $_ -and
        $_ -notmatch '(^|/)(node_modules|dist|coverage|runtime|release)(/|$)' -and
        $_ -notmatch '(^|/)\.env$' -and
        $_ -notmatch '\.(pem|key|p12|pfx)$'
    } | Sort-Object -Unique
    if ($candidatePaths.Count -lt 20) { throw 'deployment file set is unexpectedly small' }

    foreach ($relativePath in $candidatePaths) {
        $sourcePath = [IO.Path]::GetFullPath((Join-Path $projectRoot $relativePath))
        if (-not $sourcePath.StartsWith($projectRoot + [IO.Path]::DirectorySeparatorChar, [StringComparison]::OrdinalIgnoreCase) -or -not (Test-Path -LiteralPath $sourcePath -PathType Leaf)) {
            throw "Unsafe or missing deployment source path: $relativePath"
        }
        $targetPath = Join-Path $payloadRoot $relativePath
        New-Item -ItemType Directory -Force -Path (Split-Path -Parent $targetPath) | Out-Null
        Copy-Item -LiteralPath $sourcePath -Destination $targetPath
    }

    $sourceCommit = (& git rev-parse HEAD).Trim()
    if ($LASTEXITCODE -ne 0 -or $sourceCommit -notmatch '^[0-9a-f]{40}$') { throw 'source commit could not be resolved' }
    $statusLines = @(& git status --porcelain=v1)
    if ($LASTEXITCODE -ne 0) { throw 'working tree status could not be resolved' }
    $files = Get-ChildItem -LiteralPath $payloadRoot -File -Recurse | Sort-Object FullName | ForEach-Object {
        [ordered]@{
            path = $_.FullName.Substring($payloadRoot.Length + 1).Replace('\','/')
            size_bytes = $_.Length
            sha256 = (Get-FileHash -LiteralPath $_.FullName -Algorithm SHA256).Hash.ToLowerInvariant()
        }
    }
    $manifest = [ordered]@{
        schema_version = 'server-deployment-bundle-v1'
        candidate_version = $Version
        generated_at = [DateTime]::UtcNow.ToString('o')
        source_commit = $sourceCommit
        working_tree_dirty = $statusLines.Count -gt 0
        schema_migration_target = 58
        hardware_runtime = 'volc_hardware_agent'
        files = @($files)
    }
    $manifestPath = Join-Path $payloadRoot 'deploy-manifest.json'
    [IO.File]::WriteAllText($manifestPath, (($manifest | ConvertTo-Json -Depth 8) + [Environment]::NewLine), [Text.UTF8Encoding]::new($false))

    $checksumLines = Get-ChildItem -LiteralPath $payloadRoot -File -Recurse | Where-Object Name -ne 'SHA256SUMS' | Sort-Object FullName | ForEach-Object {
        $relative = $_.FullName.Substring($payloadRoot.Length + 1).Replace('\','/')
        "{0}  {1}" -f (Get-FileHash -LiteralPath $_.FullName -Algorithm SHA256).Hash.ToLowerInvariant(), $relative
    }
    [IO.File]::WriteAllLines((Join-Path $payloadRoot 'SHA256SUMS'), [string[]]$checksumLines, [Text.UTF8Encoding]::new($false))

    $archivePath = Join-Path $outputRoot ($bundleName + '.zip')
    if (Test-Path -LiteralPath $archivePath) { Remove-Item -LiteralPath $archivePath -Force }
    Compress-Archive -LiteralPath $payloadRoot -DestinationPath $archivePath -CompressionLevel Optimal
    $archiveHash = (Get-FileHash -LiteralPath $archivePath -Algorithm SHA256).Hash.ToLowerInvariant()
    "$archiveHash  $([IO.Path]::GetFileName($archivePath))" | Set-Content -LiteralPath ($archivePath + '.sha256') -Encoding ascii
    [ordered]@{ archive = $archivePath; sha256 = $archiveHash; files = $files.Count; source_commit = $sourceCommit; working_tree_dirty = $statusLines.Count -gt 0 } | ConvertTo-Json -Compress
} finally {
    $resolvedStaging = [IO.Path]::GetFullPath($stagingRoot)
    if ($resolvedStaging.StartsWith($outputRoot + [IO.Path]::DirectorySeparatorChar, [StringComparison]::OrdinalIgnoreCase) -and (Test-Path -LiteralPath $resolvedStaging)) {
        Remove-Item -LiteralPath $resolvedStaging -Recurse -Force
    }
}