param(
    [string]$SourceDir = "$PSScriptRoot/out/bin",
    [Parameter(Mandatory = $true)]
    [string]$ConfigFile,
    [string]$OutputDir = "$PSScriptRoot/dist/UpdateClient",
    [string]$ZipFile = "$PSScriptRoot/dist/UpdateClient.zip"
)

$ErrorActionPreference = "Stop"

$source = (Resolve-Path $SourceDir).Path
$config = (Resolve-Path $ConfigFile).Path
$settings = Get-Content $config -Raw -Encoding UTF8 | ConvertFrom-Json

$requiredFields = @(
    "app_id", "channel", "api_base_url", "current_version",
    "client_token", "launch_token", "license_key",
    "main_executable", "launcher_executable", "updater_executable", "bootstrap_executable"
)
foreach ($field in $requiredFields) {
    if (-not $settings.$field) {
        throw "Config file is missing required field: $field"
    }
}

$requiredFiles = @(
    $settings.main_executable,
    $settings.launcher_executable,
    $settings.updater_executable,
    $settings.bootstrap_executable
)
foreach ($name in $requiredFiles) {
    if (-not (Test-Path (Join-Path $source $name))) {
        throw "Source directory is missing required file: $name"
    }
}

$debugArtifacts = Get-ChildItem $source -Recurse -File | Where-Object {
    $_.Name -match '^(Qt5.*d|qwindowsd|libEGLd|libGLESv2d|msvcp.*d|vcruntime.*d)\.dll$' -or
    $_.Extension -in @('.pdb', '.ilk')
}
if ($debugArtifacts) {
    throw "Source directory contains Debug artifacts. Clean out/bin and rebuild Release first. Example: $($debugArtifacts[0].FullName)"
}

$nestedMain = Get-ChildItem $source -Recurse -File -Filter $settings.main_executable | Where-Object {
    $_.DirectoryName -ne $source
} | Select-Object -First 1
if ($nestedMain) {
    throw "Source directory contains a nested duplicate main executable. Use a clean Release root directory: $($nestedMain.FullName)"
}

$manifestName = "manifest_$($settings.current_version).json"
$sourceManifest = Join-Path $source "update/manifest_cache/$manifestName"
if (-not (Test-Path $sourceManifest)) {
    throw "Missing signed Manifest cache for current version: $sourceManifest. Complete online update/verification for this version before packaging."
}

if (Test-Path $OutputDir) {
    Remove-Item $OutputDir -Recurse -Force
}
New-Item $OutputDir -ItemType Directory -Force | Out-Null

Get-ChildItem $source -Force | Where-Object {
    $_.Name -notin @("update", "update_temp")
} | Copy-Item -Destination $OutputDir -Recurse -Force

$outputConfigDir = Join-Path $OutputDir "config"
New-Item $outputConfigDir -ItemType Directory -Force | Out-Null
Copy-Item $config (Join-Path $outputConfigDir "app_config.json") -Force

@("client_identity.dat", "local_state.json", "version_policy.dat") | ForEach-Object {
    $runtimeFile = Join-Path $outputConfigDir $_
    if (Test-Path $runtimeFile) { Remove-Item $runtimeFile -Force }
}

$manifestDir = Join-Path $OutputDir "update/manifest_cache"
New-Item $manifestDir -ItemType Directory -Force | Out-Null
Copy-Item $sourceManifest (Join-Path $manifestDir $manifestName) -Force

$zipParent = Split-Path $ZipFile -Parent
New-Item $zipParent -ItemType Directory -Force | Out-Null
if (Test-Path $ZipFile) { Remove-Item $ZipFile -Force }
Compress-Archive -Path (Join-Path $OutputDir "*") -DestinationPath $ZipFile -CompressionLevel Optimal

Write-Host "Package directory: $OutputDir"
Write-Host "ZIP file: $ZipFile"