// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

@JS()
library;

import 'dart:async';
import 'dart:convert';
// TODO: https://github.com/dart-lang/webdev/issues/2508
// ignore: deprecated_member_use
import 'dart:html';

import 'package:dwds/data/debug_info.dart';
// TODO: https://github.com/dart-lang/webdev/issues/2508
// ignore: deprecated_member_use
import 'package:js/js.dart';

import 'data_serializers.dart';
import 'data_types.dart';
import 'messaging.dart';
import 'storage.dart';
import 'utils.dart';

const _appIdContainerId = 'appIdContainer';
const _appIdDividerId = 'appIdDivider';
const _appIdSpanId = 'appId';
const _copyIdButtonId = 'copyIdButton';
const _copiedSuccessId = 'copiedSuccess';
const _fileBugButtonId = 'fileBugButton';
const _hiddenClass = 'hidden';
const _launchDevToolsButtonId = 'launchDevToolsButton';
const _loadingSpinnerId = 'loadingSpinner';
const _windowOption = 'windowOption';
const _tabOption = 'tabOption';

Future<int?> get _tabId async {
  final tab = await activeTab;
  return tab?.id;
}

String? _appId;

Future<void> main() async {
  _registerListeners();
  await _loadUiAndHideSpinner();
}

void _registerListeners() {
  final launchDevToolsButton =
      document.getElementById(_launchDevToolsButtonId) as ButtonElement;
  launchDevToolsButton.addEventListener('click', _launchDevTools);

  final copyButton = document.getElementById(_copyIdButtonId) as ButtonElement;
  copyButton.addEventListener('click', _copyAppId);

  final fileABugButton =
      document.getElementById(_fileBugButtonId) as ButtonElement;
  fileABugButton.addEventListener('click', _openIssueTracker);

  document.addEventListener('DOMContentLoaded', _updateSettingsFromStorage);

  final windowOption = document.getElementById(_windowOption) as InputElement;
  windowOption.addEventListener('change', (Event _) {
    _saveSettingsToStorage(windowOption.value);
  });

  final tabOption = document.getElementById(_tabOption) as InputElement;
  tabOption.addEventListener('change', (Event _) {
    _saveSettingsToStorage(tabOption.value);
  });
}

Future<void> _loadUiAndHideSpinner() async {
  final inserted = await _insertAppId();
  if (inserted) {
    _updateElementVisibility(_appIdContainerId, visible: true);
    _updateElementVisibility(_appIdDividerId, visible: true);
  }
  _updateElementVisibility(_loadingSpinnerId, visible: false);
}

Future<DebugInfo?> _fetchDebugInfo(int? tabId) async {
  if (tabId == null) return null;
  final debugInfo = await fetchStorageObject<DebugInfo>(
    type: StorageObject.debugInfo,
    tabId: tabId,
  );
  return debugInfo;
}

Future<bool> _insertAppId() async {
  final tabId = await _tabId;
  final debugInfo = await _fetchDebugInfo(tabId);
  if (debugInfo == null) return false;
  final isInternalBuild = debugInfo.isInternalBuild ?? false;
  final isFlutterApp = debugInfo.isFlutterApp ?? false;
  final workspaceName = debugInfo.workspaceName;
  if (isInternalBuild && workspaceName != null) {
    // The suffix "-f" is used to tell Cider that this is a Flutter app.
    _appId = '$workspaceName-$tabId${isFlutterApp ? '-f' : ''}';
    final appIdSpan = document.getElementById(_appIdSpanId) as SpanElement;
    appIdSpan.setInnerHtml(_appId);
    return true;
  }
  return false;
}

Future<void> _openIssueTracker(Event _) async {
  final debugInfo = await _fetchDebugInfo(await _tabId);
  final isInternalBuild = debugInfo?.isInternalBuild ?? false;
  final issueTrackerLink = isInternalBuild
      ? 'http://b/issues/new?component=775375&template=1791321'
      : 'https://github.com/dart-lang/webdev/issues/new?labels=dart-debug-extension&projects=&template=dart_debug_extension.md';
  await createTab(issueTrackerLink);
}

Future<void> _launchDevTools(Event _) async {
  final tabId = await _tabId;
  final json = jsonEncode(
    serializers.serialize(
      DebugStateChange(
        (b) => b
          ..tabId = tabId
          ..newState = DebugStateChange.startDebugging,
      ),
    ),
  );
  await sendRuntimeMessage(
    type: MessageType.debugStateChange,
    body: json,
    sender: Script.popup, // change to popup
    recipient: Script.background,
  );
}

void _copyAppId(Event _) {
  final appId = _appId;
  if (appId == null) return;
  final clipboard = window.navigator.clipboard;
  if (clipboard == null) return;
  clipboard.writeText(appId);
  _updateElementVisibility(_copiedSuccessId, visible: true);
}

Future<void> _updateSettingsFromStorage(Event _) async {
  final devToolsOpener = await fetchStorageObject<DevToolsOpener>(
    type: StorageObject.devToolsOpener,
  );
  final openInNewWindow = devToolsOpener?.newWindow ?? false;
  _getRadioButton(_windowOption).checked = openInNewWindow;
  _getRadioButton(_tabOption).checked = !openInNewWindow;
}

Future<void> _saveSettingsToStorage(String? devToolsOpener) async {
  if (devToolsOpener == null) return;
  await setStorageObject<DevToolsOpener>(
    type: StorageObject.devToolsOpener,
    value: DevToolsOpener((b) => b..newWindow = devToolsOpener == 'window'),
  );
}

RadioButtonInputElement _getRadioButton(String id) {
  return document.getElementById(id) as RadioButtonInputElement;
}

void _updateElementVisibility(String elementId, {required bool visible}) {
  final element = document.getElementById(elementId);
  if (element == null) return;
  if (visible) {
    element.classes.remove(_hiddenClass);
  } else {
    element.classes.add(_hiddenClass);
  }
}