//go:build windows

package miner

import (
	"os"
	"path/filepath"
	"strings"
)

const webView2BinaryName = "msedgewebview2.exe"

func platformWebView2Probe() WebView2ProbeResult {
	result := WebView2ProbeResult{
		BinaryName: webView2BinaryName,
		ProbeOnly:  true,
	}
	result.RuntimeInstalled = webView2RuntimeInstalled()
	result.WebGPUAvailable = result.RuntimeInstalled && webGPUAvailable()
	return result
}

func webView2RuntimeInstalled() bool {
	candidates := []string{
		filepath.Join(os.Getenv("ProgramFiles(x86)"), "Microsoft", "EdgeWebView", "Application", webView2BinaryName),
		filepath.Join(os.Getenv("ProgramFiles"), "Microsoft", "EdgeWebView", "Application", webView2BinaryName),
		filepath.Join(os.Getenv("LOCALAPPDATA"), "Microsoft", "EdgeWebView", "Application", webView2BinaryName),
	}
	for _, p := range candidates {
		if p == "" {
			continue
		}
		if st, err := os.Stat(p); err == nil && !st.IsDir() {
			return true
		}
	}
	out, err := hiddenCombinedOutput("powershell", "-NoProfile", "-Command",
		`Get-AppxPackage -Name '*WebView2*' -EA SilentlyContinue | Select-Object -First 1 | ForEach-Object { $_.Name }`)
	return err == nil && strings.TrimSpace(string(out)) != ""
}

func webGPUAvailable() bool {
	// Lightweight probe: discrete GPU + D3D12 support heuristic via WMI.
	out, err := hiddenCombinedOutput("powershell", "-NoProfile", "-Command", `
$gpu = Get-CimInstance Win32_VideoController | Where-Object { $_.AdapterRAM -gt 1GB } | Select-Object -First 1
if (-not $gpu) { 'false'; exit }
$name = $gpu.Name
if ($name -match 'Microsoft Basic|Remote') { 'false' } else { 'true' }
`)
	if err != nil {
		return false
	}
	return strings.TrimSpace(string(out)) == "true"
}