package-platform.ps1

[CmdletBinding()]
param(
    [string]$OutputRoot,
    [ValidateSet('Windows', 'macOS', 'WSL2')]
    [string[]]$Platforms = @('Windows', 'macOS', 'WSL2')
)

$ErrorActionPreference = 'Stop'
$sourceRoot = $PSScriptRoot
if ([string]::IsNullOrWhiteSpace($OutputRoot)) {
    $OutputRoot = Join-Path $sourceRoot 'dist'
}
$version = (Get-Content -LiteralPath (Join-Path $sourceRoot 'package.json') -Raw | ConvertFrom-Json).version

function Copy-RuntimeFiles {
    param([Parameter(Mandatory)][string]$Stage)

    Copy-Item -LiteralPath (Join-Path $sourceRoot 'ccm.js') -Destination (Join-Path $Stage 'ccm.js') -Force
    Copy-Item -LiteralPath (Join-Path $sourceRoot 'package.json') -Destination (Join-Path $Stage 'package.json') -Force
    Copy-Item -LiteralPath (Join-Path $sourceRoot 'lib') -Destination (Join-Path $Stage 'lib') -Recurse -Force
    foreach ($document in @('LICENSE', 'CHANGELOG.md')) {
        $documentPath = Join-Path $sourceRoot $document
        if (Test-Path -LiteralPath $documentPath) {
            Copy-Item -LiteralPath $documentPath -Destination (Join-Path $Stage $document) -Force
        }
    }
}

function New-PlatformPackage {
    param(
        [Parameter(Mandatory)][string]$Name,
        [Parameter(Mandatory)][string]$Readme,
        [Parameter(Mandatory)][scriptblock]$AddInstaller
    )

    $stage = Join-Path $env:TEMP ("ccm-package-$Name-" + [guid]::NewGuid().ToString('N'))
    $archive = Join-Path $OutputRoot ("CCM-$Name-v$version.zip")
    if (Test-Path -LiteralPath $archive) {
        throw "Refusing to overwrite existing archive: $archive"
    }
    New-Item -ItemType Directory -Path $stage | Out-Null
    try {
        Copy-RuntimeFiles -Stage $stage
        Copy-Item -LiteralPath (Join-Path $sourceRoot $Readme) -Destination (Join-Path $stage 'README.md') -Force
        & $AddInstaller $stage
        $entries = Get-ChildItem -LiteralPath $stage -Force | Select-Object -ExpandProperty Name
        tar.exe -a -c -f $archive -C $stage @entries
        Get-FileHash -LiteralPath $archive -Algorithm SHA256 | Select-Object @{Name='Package';Expression={$Name}},Algorithm,Hash,Path
    } finally {
        if (Test-Path -LiteralPath $stage) {
            Remove-Item -LiteralPath $stage -Recurse -Force
        }
    }
}

New-Item -ItemType Directory -Force -Path $OutputRoot | Out-Null
if ($Platforms -contains 'Windows') {
    New-PlatformPackage -Name 'Windows' -Readme 'README.windows.md' -AddInstaller {
        param($stage)
        Copy-Item -LiteralPath (Join-Path $sourceRoot 'install.ps1') -Destination (Join-Path $stage 'install.ps1') -Force
        Copy-Item -LiteralPath (Join-Path $sourceRoot 'Install-CCM.cmd') -Destination (Join-Path $stage 'Install-CCM.cmd') -Force
    }
}
if ($Platforms -contains 'macOS') {
    New-PlatformPackage -Name 'macOS' -Readme 'README.macos.md' -AddInstaller {
        param($stage)
        Copy-Item -LiteralPath (Join-Path $sourceRoot 'install.sh') -Destination (Join-Path $stage 'install.sh') -Force
    }
}
if ($Platforms -contains 'WSL2') {
    New-PlatformPackage -Name 'WSL2' -Readme 'README.wsl2.md' -AddInstaller {
        param($stage)
        Copy-Item -LiteralPath (Join-Path $sourceRoot 'install.sh') -Destination (Join-Path $stage 'install.sh') -Force
    }
}