#!/usr/bin/env pwsh
# Update act_runner to latest release from Gitea
# Usage: ./update_act_runner.ps1 [-Force]

param(
    [switch]$Force,
    [string]$Arch = "windows-amd64",
    [string]$ExeName = "act_runner.exe"
)

$ErrorActionPreference = 'Stop'

$API = "https://gitea.com/api/v1/repos/gitea/act_runner/releases/latest"
$ExePath = Join-Path $PSScriptRoot $ExeName

function Get-CurrentVersion {
    if (-not (Test-Path $ExePath)) { return $null }
    $out = & $ExePath --version 2>&1 | Select-Object -First 1
    if ($out -match '(\d+\.\d+\.\d+)') { return $matches[1] }
    return $null
}

# Fetch latest release info
Write-Host "Fetching latest release info..." -ForegroundColor Cyan
$release = Invoke-RestMethod -Uri $API

$tag = $release.tag_name -replace '^v', ''
$currentVersion = Get-CurrentVersion

Write-Host "Latest: $tag | Current: $($currentVersion ?? 'not installed')"

if ($currentVersion -eq $tag -and -not $Force) {
    Write-Host "Already up to date." -ForegroundColor Green
    exit 0
}

# Find the right asset
$pattern = "act_runner-.*-$Arch\.exe$"
$asset = $release.assets | Where-Object { $_.name -match $pattern } | Select-Object -First 1

if (-not $asset) {
    Write-Error "No asset found matching pattern: $pattern"
    exit 1
}

$downloadUrl = $asset.browser_download_url
Write-Host "Downloading $($asset.name)..." -ForegroundColor Cyan

# Download to temp then move
$tmpFile = Join-Path $PSScriptRoot "act_runner.tmp.exe"
Invoke-WebRequest -Uri $downloadUrl -OutFile $tmpFile -UseBasicParsing

# Stop running instance if any
$running = Get-Process | Where-Object { $_.Path -eq $ExePath } | Select-Object -First 1
if ($running) {
    Write-Host "Stopping running act_runner (PID $($running.Id))..." -ForegroundColor Yellow
    Stop-Process -Id $running.Id -Force
    Start-Sleep -Milliseconds 500
}

# Replace
Move-Item -Path $tmpFile -Destination $ExePath -Force

Write-Host "Updated to $tag" -ForegroundColor Green