param(

[string]$Version = $env:TAB_VERSION,

[string]$InstallDir = $env:TAB_INSTALL_DIR,

[string]$ReleaseBaseUrl = $env:TAB_RELEASE_BASE_URL

)

$ErrorActionPreference = "Stop"

Set-StrictMode -Version Latest

$repository = "hmmhmmhm/tmux-attach-browser"

if ([string]::IsNullOrWhiteSpace($InstallDir)) {

$InstallDir = Join-Path $HOME ".local\bin"

}

$runtimeArch = [System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture.ToString().ToLowerInvariant()

switch ($runtimeArch) {

"x64" { $arch = "amd64" }

"arm64" { $arch = "arm64" }

default { throw "Unsupported Windows architecture: $runtimeArch" }

}

$archive = "tab_windows_${arch}.zip"

if ([string]::IsNullOrWhiteSpace($ReleaseBaseUrl)) {

if ([string]::IsNullOrWhiteSpace($Version)) {

$ReleaseBaseUrl = "https://github.com/$repository/releases/latest/download"

} else {

$ReleaseBaseUrl = "https://github.com/$repository/releases/download/$Version"

}

}

$temporaryDir = Join-Path ([System.IO.Path]::GetTempPath()) ("tab-install-" + [System.Guid]::NewGuid().ToString("N"))

New-Item -ItemType Directory -Path $temporaryDir | Out-Null

try {

$archivePath = Join-Path $temporaryDir $archive

$checksumsPath = Join-Path $temporaryDir "checksums.txt"

Invoke-WebRequest -UseBasicParsing -Uri "$ReleaseBaseUrl/$archive" -OutFile $archivePath

Invoke-WebRequest -UseBasicParsing -Uri "$ReleaseBaseUrl/checksums.txt" -OutFile $checksumsPath

$checksumLine = Get-Content $checksumsPath | Where-Object {

$_ -match "^([0-9a-fA-F]{64})\s+\*?$([regex]::Escape($archive))$"

} | Select-Object -First 1

if (-not $checksumLine) {

throw "Checksum entry for $archive was not found"

}

$expected = ($checksumLine -split "\s+")[0].ToLowerInvariant()

$actual = (Get-FileHash -Algorithm SHA256 -Path $archivePath).Hash.ToLowerInvariant()

if ($actual -ne $expected) {

throw "Checksum verification failed for $archive"

}

$expanded = Join-Path $temporaryDir "expanded"

Expand-Archive -Path $archivePath -DestinationPath $expanded

New-Item -ItemType Directory -Force -Path $InstallDir | Out-Null

Copy-Item -Force (Join-Path $expanded "tab.exe") (Join-Path $InstallDir "tab.exe")

Write-Output "Installed tab to $(Join-Path $InstallDir 'tab.exe')"

if (-not (Get-Command tmux -ErrorAction SilentlyContinue)) {

Write-Warning "tmux was not found. WSL2 is the supported Windows environment for tab."

}

} finally {

Remove-Item -Recurse -Force $temporaryDir -ErrorAction SilentlyContinue

}