// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import 'src/analytics/analytics_controller.dart';
import 'src/app.dart';
import 'src/config_specific/framework_initialize/framework_initialize.dart';
import 'src/config_specific/ide_theme/ide_theme.dart';
import 'src/config_specific/url/url.dart';
import 'src/config_specific/url_strategy/url_strategy.dart';
import 'src/extension_points/extensions_base.dart';
import 'src/extension_points/extensions_external.dart';
import 'src/framework/app_error_handling.dart';
import 'src/primitives/feature_flags.dart';
import 'src/primitives/url_utils.dart';
import 'src/screens/debugger/syntax_highlighter.dart';
import 'src/screens/provider/riverpod_error_logger_observer.dart';
import 'src/shared/globals.dart';
import 'src/shared/preferences.dart';

void main() async {
  // Before switching to URL path strategy, check if this URL is in the legacy
  // fragment format and redirect if necessary.
  if (_handleLegacyUrl()) return;

  usePathUrlStrategy();

  // Initialize the framework before we do anything else, otherwise the
  // StorageController won't be initialized and preferences won't be loaded.
  await initializeFramework();

  setGlobal(IdeTheme, getIdeTheme());

  // Set the extension points global.
  setGlobal(DevToolsExtensionPoints, ExternalDevToolsExtensionPoints());

  final preferences = PreferencesController();
  // Wait for preferences to load before rendering the app to avoid a flash of
  // content with the incorrect theme.
  await preferences.init();

  // Load the Dart syntax highlighting grammar.
  await SyntaxHighlighter.initialize();

  setupErrorHandling(() async {
    if (!kReleaseMode) enableExperiments = true;

    // Run the app.
    runApp(
      ProviderScope(
        observers: const [ErrorLoggerObserver()],
        child: DevToolsApp(defaultScreens, await analyticsController),
      ),
    );
  });
}

/// Checks if the request is for a legacy URL and if so, redirects to the new
/// equivalent.
///
/// Returns `true` if a redirect was performed, in which case normal app
/// initialization should be skipped.
bool _handleLegacyUrl() {
  final url = getWebUrl();
  if (url == null) return false;

  final newUrl = mapLegacyUrl(url);
  if (newUrl != null) {
    webRedirect(newUrl);
    return true;
  }

  return false;
}