"""Isolated WebView2 test host."""
import json
import pathlib
import shutil
import subprocess
import urllib.request
import zipfile
from .common import BASE
ROOT = BASE / "webview2-harmless-test"
VERSION = "1.0.2903.40"

SOURCE = r'''
using System;
using System.IO;
using System.Windows.Forms;
using Microsoft.Web.WebView2.Core;
using Microsoft.Web.WebView2.WinForms;
class Probe : Form {
  WebView2 view = new WebView2();
  string report;
  Timer deadline = new Timer();
  bool completed;
  Probe(string path) {
    report = path; ShowInTaskbar = false; Opacity = 0;
    Controls.Add(view); view.Dock = DockStyle.Fill;
    deadline.Interval = 45000;
    deadline.Tick += (s,e) => Finish("{\"passed\":false,\"error\":\"timeout\"}", 2);
    Shown += async (s,e) => {
      deadline.Start();
      try {
        var env = await CoreWebView2Environment.CreateAsync(null,
          Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "test-profile"));
        await view.EnsureCoreWebView2Async(env);
        var result = await view.CoreWebView2.ExecuteScriptAsync(
          "({arithmetic:1+1,marker:'isolated-webview2-test',url:location.href})");
        bool ok = result.Contains("\"arithmetic\":2") && result.Contains("isolated-webview2-test");
        Finish("{\"passed\":" + (ok ? "true" : "false") +
          ",\"method\":\"CoreWebView2.ExecuteScriptAsync\",\"external_process_injection\":false," +
          "\"result\":" + result + "}", ok ? 0 : 1);
      } catch(Exception ex) {
        File.WriteAllText(report + ".error.txt", ex.ToString());
        Finish("{\"passed\":false,\"error\":\"See .error.txt\"}", 1);
      }
    };
  }
  void Finish(string data, int code) {
    if(completed) return; completed=true; deadline.Stop();
    File.WriteAllText(report,data); Environment.ExitCode=code;
    view.Dispose(); Close();
  }
  [STAThread] static void Main(string[] args) {
    Application.EnableVisualStyles(); Application.Run(new Probe(args[0]));
  }
}
'''

def run_webview_test():
    ROOT.mkdir(exist_ok=True)
    package = ROOT / ('webview2-' + VERSION + '.nupkg')
    if not package.exists():
        urllib.request.urlretrieve(
            'https://api.nuget.org/v3-flatcontainer/microsoft.web.webview2/' + VERSION +
            '/microsoft.web.webview2.' + VERSION + '.nupkg', package)
    with zipfile.ZipFile(package) as archive:
        for name in ('lib/net462/Microsoft.Web.WebView2.Core.dll',
                     'lib/net462/Microsoft.Web.WebView2.WinForms.dll',
                     'runtimes/win-x64/native/WebView2Loader.dll'):
            with archive.open(name) as src, (ROOT / pathlib.Path(name).name).open('wb') as dest:
                shutil.copyfileobj(src, dest)
    source = ROOT / 'Probe.cs'
    source.write_text(SOURCE, encoding='utf-8')
    exe = ROOT / 'Probe.exe'
    compiler = r'C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe'
    subprocess.run([compiler, '/nologo', '/target:winexe', '/platform:x64',
                    '/out:' + str(exe), '/r:System.Windows.Forms.dll',
                    '/r:System.Drawing.dll',
                    '/r:' + str(ROOT / 'Microsoft.Web.WebView2.Core.dll'),
                    '/r:' + str(ROOT / 'Microsoft.Web.WebView2.WinForms.dll'),
                    str(source)], check=True, creationflags=subprocess.CREATE_NO_WINDOW)
    report = ROOT / 'result.json'
    report.unlink(missing_ok=True)
    run = subprocess.run([str(exe), str(report)], cwd=ROOT, timeout=60,
                         creationflags=subprocess.CREATE_NO_WINDOW)
    if report.exists():
        print(json.dumps(json.loads(report.read_text(encoding='utf-8-sig')), indent=2))
    else:
        raise RuntimeError('Test host exited without a report: ' + str(run.returncode))
    return run.returncode