# {{ .DisplayName }} Credential Helper Installation Script for Windows
# Usage: iwr -useb https://{{ .SiteHost }}/static/install.ps1 | iex

$ErrorActionPreference = "Stop"

# Configuration
$BinaryName = "{{ .BinaryName }}.exe"
$InstallDir = if ($env:{{ .EnvPrefix }}_INSTALL_DIR) { $env:{{ .EnvPrefix }}_INSTALL_DIR } else { "$env:ProgramFiles\{{ .DisplayName }}" }
$TangledRepo = if ($env:{{ .EnvPrefix }}_TANGLED_REPO) { $env:{{ .EnvPrefix }}_TANGLED_REPO } else { "{{ .ReleasesBaseURL }}" }

Write-Host "{{ .DisplayName }} Credential Helper Installer for Windows" -ForegroundColor Green
Write-Host ""

# Detect architecture
function Get-Architecture {
    $arch = (Get-WmiObject Win32_Processor).Architecture
    switch ($arch) {
        9 { return "x86_64" }  # x64
        12 { return "arm64" }  # ARM64
        default {
            Write-Host "Unsupported architecture: $arch" -ForegroundColor Red
            exit 1
        }
    }
}

$Arch = Get-Architecture
Write-Host "Detected: Windows $Arch" -ForegroundColor Green

# Resolve the latest version by following the tangled /tags/latest redirect
# chain. Tangled redirects DID→handle first, then handle/tags/latest→handle/tags/vX.Y.Z,
# so we follow all redirects and read the final effective URL.
function Get-LatestVersion {
    Write-Host "Resolving latest version..." -ForegroundColor Yellow

    try {
        $response = Invoke-WebRequest -Uri "$TangledRepo/tags/latest" -UseBasicParsing -Method Head
    } catch {
        Write-Host "Failed to resolve latest version from $TangledRepo/tags/latest" -ForegroundColor Red
        exit 1
    }

    # PowerShell 7+ exposes the final URI via RequestMessage; PowerShell 5 via ResponseUri.
    if ($response.BaseResponse.RequestMessage) {
        $finalUrl = $response.BaseResponse.RequestMessage.RequestUri.ToString()
    } else {
        $finalUrl = $response.BaseResponse.ResponseUri.ToString()
    }

    if (-not $finalUrl) {
        Write-Host "Failed to resolve latest version from $TangledRepo/tags/latest" -ForegroundColor Red
        exit 1
    }

    $tag = $finalUrl.TrimEnd('/').Split('/')[-1]
    if (-not $tag.StartsWith('v')) {
        Write-Host "Unexpected redirect location: $finalUrl" -ForegroundColor Red
        exit 1
    }

    Write-Host "Found latest version: $tag" -ForegroundColor Green
    return $tag
}

# Build the download URL from version and platform
function Get-DownloadUrl {
    param([string]$Version, [string]$Arch)

    $versionClean = $Version.TrimStart('v')
    $fileName = "{{ .BinaryName }}_${versionClean}_Windows_${Arch}.tar.gz"
    return "$TangledRepo/tags/$Version/download/$fileName"
}

# Determine version and download URL
if ($env:{{ .EnvPrefix }}_VERSION) {
    $Version = $env:{{ .EnvPrefix }}_VERSION
    Write-Host "Using specified version: $Version" -ForegroundColor Yellow
} else {
    $Version = Get-LatestVersion
}

$DownloadUrl = Get-DownloadUrl -Version $Version -Arch $Arch
Write-Host "Installing version: $Version" -ForegroundColor Green

# Download and install binary
function Install-Binary {
    param (
        [string]$DownloadUrl
    )

    Write-Host "Downloading from: $DownloadUrl" -ForegroundColor Yellow

    $tempDir = New-Item -ItemType Directory -Path "$env:TEMP\{{ .Name }}-install-$(Get-Random)" -Force
    $archivePath = Join-Path $tempDir "{{ .BinaryName }}.tar.gz"

    try {
        Invoke-WebRequest -Uri $DownloadUrl -OutFile $archivePath -UseBasicParsing
    } catch {
        Write-Host "Failed to download release: $_" -ForegroundColor Red
        exit 1
    }

    Write-Host "Extracting..." -ForegroundColor Yellow
    # Modern Windows ships tar.exe; use it to handle .tar.gz produced by goreleaser.
    & tar.exe -xzf $archivePath -C $tempDir
    if ($LASTEXITCODE -ne 0) {
        Write-Host "Failed to extract archive" -ForegroundColor Red
        exit 1
    }

    # Create install directory
    if (-not (Test-Path $InstallDir)) {
        New-Item -ItemType Directory -Path $InstallDir -Force | Out-Null
    }

    # Install binary
    $binaryPath = Join-Path $tempDir $BinaryName
    $destPath = Join-Path $InstallDir $BinaryName

    Copy-Item -Path $binaryPath -Destination $destPath -Force

    # Clean up
    Remove-Item -Path $tempDir -Recurse -Force

    Write-Host "Installed $BinaryName to $InstallDir" -ForegroundColor Green
}

# Add to PATH if not already present
function Add-ToPath {
    $currentPath = [Environment]::GetEnvironmentVariable("Path", "Machine")

    if ($currentPath -notlike "*$InstallDir*") {
        Write-Host "Adding $InstallDir to system PATH..." -ForegroundColor Yellow

        # Check if running as administrator
        $isAdmin = ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)

        if ($isAdmin) {
            [Environment]::SetEnvironmentVariable("Path", "$currentPath;$InstallDir", "Machine")
            $env:Path = "$env:Path;$InstallDir"
            Write-Host "Added to PATH successfully" -ForegroundColor Green
        } else {
            Write-Host "WARNING: Not running as administrator. Cannot update system PATH." -ForegroundColor Yellow
            Write-Host "Please add $InstallDir to your PATH manually or re-run as administrator." -ForegroundColor Yellow
        }
    }
}

# Verify installation
function Test-Installation {
    $binaryPath = Join-Path $InstallDir $BinaryName

    if (Test-Path $binaryPath) {
        Write-Host "Verification successful!" -ForegroundColor Green

        # Try to run version command
        try {
            & $binaryPath --version
        } catch {
            Write-Host "Binary installed but PATH may need to be refreshed." -ForegroundColor Yellow
            Write-Host "Please restart your terminal or run: refreshenv" -ForegroundColor Yellow
        }
    } else {
        Write-Host "Installation failed: binary not found at $binaryPath" -ForegroundColor Red
        exit 1
    }
}

# Show configuration instructions
function Show-Configuration {
    Write-Host ""
    Write-Host "Installation complete!" -ForegroundColor Green
    Write-Host ""
    Write-Host "To use {{ .DisplayName }} with Docker, configure Docker to use this credential helper:" -ForegroundColor Yellow
    Write-Host '  Edit %USERPROFILE%\.docker\config.json and add:'
    Write-Host '  {
    "credHelpers": {
      "{{ .RegistryHost }}": "{{ .Name }}"
    }
  }'
    Write-Host ""
    Write-Host "Note: You may need to restart your terminal for PATH changes to take effect." -ForegroundColor Yellow
}

# Main installation flow
try {
    Install-Binary -DownloadUrl $DownloadUrl
    Add-ToPath
    Test-Installation
    Show-Configuration
} catch {
    Write-Host "Installation failed: $_" -ForegroundColor Red
    exit 1
}