import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart';
import 'package:get/src/dialog/dialog.dart';
import 'package:get/get.dart';
import '../get.dart';
import 'platform/platform.dart';
import 'routes/default_route.dart';

class Get {
  static Get _get;
  static GlobalKey<NavigatorState> _key;

  static GlobalKey<NavigatorState> addKey(GlobalKey<NavigatorState> newKey) {
    _key = newKey;
    return _key;
  }

  static GlobalKey<NavigatorState> get key {
    if (_key == null) {
      _key = GlobalKey<NavigatorState>();
    }
    return _key;
  }

  ///Use Get.to instead of Navigator.push, Get.off instead of Navigator.pushReplacement,
  ///Get.offAll instead of Navigator.pushAndRemoveUntil. For named routes just add "named"
  ///after them. Example: Get.toNamed, Get.offNamed, and Get.AllNamed.
  ///To return to the previous screen, use Get.back().
  ///No need to pass any context to Get, just put the name of the route inside
  ///the parentheses and the magic will occur.
  factory Get() {
    if (_get == null) _get = Get._();
    return _get;
  }

  ///Use Get.to instead of Navigator.push, Get.off instead of Navigator.pushReplacement,
  ///Get.offAll instead of Navigator.pushAndRemoveUntil. For named routes just add "named"
  ///after them. Example: Get.toNamed, Get.offNamed, and Get.AllNamed.
  ///To return to the previous screen, use Get.back().
  ///No need to pass any context to Get, just put the name of the route inside
  ///the parentheses and the magic will occur.
  Get._();

  static bool _enableLog = true;
  static bool _defaultPopGesture = GetPlatform.isIOS;
  static bool _defaultOpaqueRoute = true;
  static Transition _defaultTransition =
      (GetPlatform.isIOS ? Transition.cupertino : Transition.fade);

  /// It replaces Navigator.push, but needs no context, and it doesn't have the Navigator.push
  /// routes rebuild bug present in Flutter. If for some strange reason you want the default behavior
  /// of rebuilding every app after a route, use opaque = true as the parameter.
  static Future<T> to<T>(Widget page,
      {bool opaque,
      Transition transition,
      Duration duration,
      int id,
      bool popGesture}) {
    if (id == null) {
      return key.currentState.push(GetRoute(
          opaque: opaque ?? true,
          page: page,
          popGesture: popGesture ?? _defaultPopGesture,
          transition: transition ?? _defaultTransition,
          transitionDuration: duration ?? const Duration(milliseconds: 400)));
    } else {
      return global(id).currentState.push(GetRoute(
          opaque: opaque ?? true,
          page: page,
          popGesture: popGesture ?? _defaultPopGesture,
          transition: transition ?? _defaultTransition,
          transitionDuration: duration ?? const Duration(milliseconds: 400)));
    }
  }

  /// It replaces Navigator.pushNamed, but needs no context, and it doesn't have the Navigator.pushNamed
  /// routes rebuild bug present in Flutter. If for some strange reason you want the default behavior
  /// of rebuilding every app after a route, use opaque = true as the parameter.
  static Future<T> toNamed<T>(String page, {arguments, int id}) {
    // if (key.currentState.mounted) // add this if appear problems on future with route navigate
    // when widget don't mounted
    if (id == null) {
      return key.currentState.pushNamed(page, arguments: arguments);
    } else {
      return global(id).currentState.pushNamed(page, arguments: arguments);
    }
  }

  /// It replaces Navigator.pushReplacementNamed, but needs no context.
  static Future<T> offNamed<T>(String page, {arguments, int id}) {
    // if (key.currentState.mounted) // add this if appear problems on future with route navigate
    // when widget don't mounted
    if (id == null) {
      return key.currentState.pushReplacementNamed(page, arguments: arguments);
    } else {
      return global(id)
          .currentState
          .pushReplacementNamed(page, arguments: arguments);
    }
  }

  /// It replaces Navigator.popUntil, but needs no context.
  static void until(String page, predicate, {int id}) {
    // if (key.currentState.mounted) // add this if appear problems on future with route navigate
    // when widget don't mounted
    if (id == null) {
      return key.currentState.popUntil(predicate);
    } else {
      return global(id).currentState.popUntil(predicate);
    }
  }

  /// It replaces Navigator.pushAndRemoveUntil, but needs no context.
  static Future<T> offUntil<T>(page, predicate, {int id}) {
    // if (key.currentState.mounted) // add this if appear problems on future with route navigate
    // when widget don't mounted
    if (id == null) {
      return key.currentState.pushAndRemoveUntil(page, predicate);
    } else {
      return global(id).currentState.pushAndRemoveUntil(page, predicate);
    }
  }

  /// It replaces Navigator.pushNamedAndRemoveUntil, but needs no context.
  static Future<T> offNamedUntil<T>(page, predicate, {int id}) {
    // if (key.currentState.mounted) // add this if appear problems on future with route navigate
    // when widget don't mounted
    if (id == null) {
      return key.currentState.pushNamedAndRemoveUntil(page, predicate);
    } else {
      return global(id).currentState.pushNamedAndRemoveUntil(page, predicate);
    }
  }

  /// It replaces Navigator.removeRoute, but needs no context.
  static void removeRoute(route, {int id}) {
    if (id == null) {
      return key.currentState.removeRoute(route);
    } else {
      return global(id).currentState.removeRoute(route);
    }
  }

  /// It replaces Navigator.pushNamedAndRemoveUntil, but needs no context.
  static Future<T> offAllNamed<T>(String newRouteName,
      {RoutePredicate predicate, arguments, int id}) {
    var route = (Route<dynamic> rota) => false;

    if (id == null) {
      return key.currentState.pushNamedAndRemoveUntil(
          newRouteName, predicate ?? route,
          arguments: arguments);
    } else {
      return global(id).currentState.pushNamedAndRemoveUntil(
          newRouteName, predicate ?? route,
          arguments: arguments);
    }
  }

  /// It replaces Navigator.pop, but needs no context.
  static void back({dynamic result, int id}) {
    if (id == null) {
      key.currentState.pop(result);
    } else {
      global(id).currentState.pop(result);
    }
  }

  /// Experimental API to back from overlay
  static void backE({dynamic result}) {
    Navigator.pop(overlayContext);
  }

  /// It will close as many screens as you define. Times must be> 0;
  static void close(int times) {
    if ((times == null) || (times < 1)) {
      times = 1;
    }
    int count = 0;
    void back = key.currentState.popUntil((route) {
      return count++ == times;
    });
    return back;
  }

  /// It replaces Navigator.pushReplacement, but needs no context, and it doesn't have the Navigator.pushReplacement
  /// routes rebuild bug present in Flutter. If for some strange reason you want the default behavior
  /// of rebuilding every app after a route, use opaque = true as the parameter.
  static Future<T> off<T>(Widget page,
      {bool opaque = false,
      Transition transition,
      bool popGesture,
      int id,
      Duration duration = const Duration(milliseconds: 400)}) {
    if (id == null) {
      return key.currentState.pushReplacement(GetRoute(
          opaque: opaque ?? true,
          page: page,
          popGesture: popGesture ?? _defaultPopGesture,
          transition: transition ?? _defaultTransition,
          transitionDuration: duration));
    } else {
      return global(id).currentState.pushReplacement(GetRoute(
          opaque: opaque ?? true,
          page: page,
          popGesture: popGesture ?? _defaultPopGesture,
          transition: transition ?? _defaultTransition,
          transitionDuration: duration));
    }
  }

  /// It replaces Navigator.pushAndRemoveUntil, but needs no context
  static Future<T> offAll<T>(Widget page,
      {RoutePredicate predicate,
      bool opaque = false,
      bool popGesture,
      int id,
      Transition transition}) {
    var route = (Route<dynamic> rota) => false;

    if (id == null) {
      return key.currentState.pushAndRemoveUntil(
          GetRoute(
            opaque: opaque ?? true,
            popGesture: popGesture ?? _defaultPopGesture,
            page: page,
            transition: transition ?? _defaultTransition,
          ),
          predicate ?? route);
    } else {
      return global(id).currentState.pushAndRemoveUntil(
          GetRoute(
            opaque: opaque ?? true,
            popGesture: popGesture ?? _defaultPopGesture,
            page: page,
            transition: transition ?? _defaultTransition,
          ),
          predicate ?? route);
    }
  }

  /// Show a dialog. You can choose color and opacity of background
  static Future<T> dialog<T>(
    Widget child, {
    bool barrierDismissible = true,
    //  WidgetBuilder builder,
    bool useRootNavigator = true,
  }) {
    assert(child != null);
    assert(useRootNavigator != null);
    final ThemeData theme =
        Theme.of(Get.key.currentContext, shadowThemeOnly: true);

    return getShowGeneralDialog(
      pageBuilder: (BuildContext buildContext, Animation<double> animation,
          Animation<double> secondaryAnimation) {
        final Widget pageChild = child; // ?? Builder(builder: builder);
        return SafeArea(
          child: Builder(builder: (BuildContext context) {
            return theme != null
                ? Theme(data: theme, child: pageChild)
                : pageChild;
          }),
        );
      },
      barrierDismissible: barrierDismissible,
      barrierLabel: MaterialLocalizations.of(Get.key.currentContext)
          .modalBarrierDismissLabel,
      barrierColor: Colors.black54,
      transitionDuration: const Duration(milliseconds: 150),
      // transitionBuilder: _buildMaterialDialogTransitions,
      useRootNavigator: useRootNavigator,
    );
  }

  static Future<T> defaultDialog<T>(
      {Color color,
      double opacity = 0.2,
      String title = "Alert dialog",
      Widget content,
      Widget cancel,
      Widget confirm}) {
    final child = DefaultDialogGet(
      color: color,
      opacity: opacity,
      title: title,
      content: content,
      cancel: cancel,
      confirm: confirm,
    );

    return dialog(child);
  }

  static Future<T> bottomSheet<T>({
    @required WidgetBuilder builder,
    Color backgroundColor,
    double elevation,
    ShapeBorder shape,
    Clip clipBehavior,
    Color barrierColor,
    bool ignoreSafeArea,
    bool isScrollControlled = false,
    bool useRootNavigator = false,
    bool isDismissible = true,
    bool enableDrag = true,
  }) {
    assert(builder != null);
    assert(isScrollControlled != null);
    assert(useRootNavigator != null);
    assert(isDismissible != null);
    assert(enableDrag != null);

    return Get.key.currentState.push<T>(GetModalBottomSheetRoute<T>(
      builder: builder,
      theme: Theme.of(Get.key.currentContext, shadowThemeOnly: true),
      isScrollControlled: isScrollControlled,
      barrierLabel: MaterialLocalizations.of(Get.key.currentContext)
          .modalBarrierDismissLabel,
      backgroundColor: backgroundColor ?? Colors.transparent,
      elevation: elevation,
      shape: shape,
      removeTop: ignoreSafeArea ?? true,
      clipBehavior: clipBehavior,
      isDismissible: isDismissible,
      modalBarrierColor: barrierColor,
      settings: RouteSettings(name: "bottomsheet"),
      enableDrag: enableDrag,
    ));
  }

  static void snackbar(title, message,
      {Color colorText,
      Duration duration,
      SnackPosition snackPosition,
      Widget titleText,
      Widget messageText,
      Widget icon,
      bool shouldIconPulse,
      double maxWidth,
      EdgeInsets margin,
      EdgeInsets padding,
      double borderRadius,
      Color borderColor,
      double borderWidth,
      Color backgroundColor,
      Color leftBarIndicatorColor,
      List<BoxShadow> boxShadows,
      Gradient backgroundGradient,
      FlatButton mainButton,
      OnTap onTap,
      bool isDismissible,
      bool showProgressIndicator,
      SnackDismissDirection dismissDirection,
      AnimationController progressIndicatorController,
      Color progressIndicatorBackgroundColor,
      Animation<Color> progressIndicatorValueColor,
      SnackStyle snackStyle,
      Curve forwardAnimationCurve,
      Curve reverseAnimationCurve,
      Duration animationDuration,
      double barBlur,
      double overlayBlur,
      Color overlayColor,
      Form userInputForm}) {
    SchedulerBinding.instance.addPostFrameCallback((_) {
      final Color defaultColor = IconTheme.of(Get.key.currentContext).color;
      return GetBar(
          titleText: titleText ??
              Text(
                title,
                style: TextStyle(
                    color: colorText ?? defaultColor,
                    fontWeight: FontWeight.w800,
                    fontSize: 16),
              ),
          messageText: messageText ??
              Text(
                message,
                style: TextStyle(
                    color: colorText ?? defaultColor,
                    fontWeight: FontWeight.w300,
                    fontSize: 14),
              ),
          snackPosition: snackPosition ?? SnackPosition.TOP,
          borderRadius: borderRadius ?? 15,
          margin: margin ?? EdgeInsets.symmetric(horizontal: 10),
          duration: duration ?? Duration(seconds: 3),
          barBlur: barBlur ?? 7.0,
          backgroundColor: backgroundColor ?? Colors.grey.withOpacity(0.2),
          icon: icon,
          shouldIconPulse: shouldIconPulse ?? true,
          maxWidth: maxWidth,
          padding: padding ?? EdgeInsets.all(16),
          borderColor: borderColor,
          borderWidth: borderWidth,
          leftBarIndicatorColor: leftBarIndicatorColor,
          boxShadows: boxShadows,
          backgroundGradient: backgroundGradient,
          mainButton: mainButton,
          onTap: onTap,
          isDismissible: isDismissible ?? true,
          dismissDirection: dismissDirection ?? SnackDismissDirection.VERTICAL,
          showProgressIndicator: showProgressIndicator ?? false,
          progressIndicatorController: progressIndicatorController,
          progressIndicatorBackgroundColor: progressIndicatorBackgroundColor,
          progressIndicatorValueColor: progressIndicatorValueColor,
          snackStyle: snackStyle ?? SnackStyle.FLOATING,
          forwardAnimationCurve: forwardAnimationCurve ?? Curves.easeOutCirc,
          reverseAnimationCurve: reverseAnimationCurve ?? Curves.easeOutCirc,
          animationDuration: animationDuration ?? Duration(seconds: 1),
          overlayBlur: overlayBlur ?? 0.0,
          overlayColor: overlayColor ?? Colors.transparent,
          userInputForm: userInputForm)
        ..show();
    });
  }

  /// change default config of Get
  static void config(
      {bool enableLog,
      bool defaultPopGesture,
      bool defaultOpaqueRoute,
      Transition defaultTransition}) {
    if (enableLog != null) {
      _enableLog = enableLog;
    }
    if (defaultPopGesture != null) {
      _defaultPopGesture = defaultPopGesture;
    }
    if (defaultOpaqueRoute != null) {
      _defaultOpaqueRoute = defaultOpaqueRoute;
    }
    if (defaultTransition != null) {
      _defaultTransition = defaultTransition;
    }
  }

  static Map<int, GlobalKey<NavigatorState>> _keys = {};

  static GlobalKey<NavigatorState> nestedKey(int key) {
    _keys.putIfAbsent(key, () => GlobalKey<NavigatorState>());
    return _keys[key];
  }

  static GlobalKey<NavigatorState> global(int key) {
    if (!_keys.containsKey(key)) {
      throw 'route id not found';
    }
    final recoverKey = _keys[key];
    return recoverKey;
  }

  static Map<dynamic, dynamic> _singl = {};

  /// Register a singleton instance of your class
  static T put<T>(T singleton) {
    _singl.putIfAbsent(T, () => singleton);
    return _singl[T];
  }

  /// Delete a singleton instance of your class
  static bool delete<T>(T singleton) {
    if (!_singl.containsKey(T)) {
      throw 'key id not found';
    }
    _singl.removeWhere((oldkey, value) => (oldkey == T));
    return true;
  }

  /// Recover a singleton instance of your class
  static T find<T>(T key) {
    if (!_singl.containsKey(T)) {
      throw 'key id not found';
    }
    final recoverKey = _singl[T];
    return recoverKey;
  }

  /// give access to Routing API from GetObserver
  static Routing get routing => _routing;

  static Routing _routing;

  static setRouting(Routing rt) {
    _routing = rt;
  }

  /// give current arguments
  static get arguments => _routing.args;

  /// give arguments from previous route
  static get previousArguments => _routing.previousArgs;

  /// give name from current route
  static get currentRoute => _routing.current;

  /// give name from previous route
  static get previousRoute => _routing.previous;

  /// check if snackbar is open
  static bool get isSnackbarOpen => _routing.isSnackbar;

  /// check if dialog is open
  static bool get isDialogOpen => _routing.isDialog;

  /// check if bottomsheet is open
  static bool get isBottomSheetOpen => _routing.isBottomSheet;

  /// check a raw current route
  static Route<dynamic> get rawRoute => _routing.route;

  /// check if log is enable
  static bool get isLogEnable => _enableLog;

  /// check if popGesture is enable
  static bool get isPopGestureEnable => _defaultPopGesture;

  /// check if default opaque route is enable
  static bool get isOpaqueRouteDefault => _defaultOpaqueRoute;

  static Transition get defaultTransition => _defaultTransition;

  /// give access to currentContext
  static BuildContext get context => key.currentContext;

  /// give access to current Overlay Context
  static BuildContext get overlayContext => key.currentState.overlay.context;

  /// give access to Theme.of(context)
  static ThemeData get theme => Theme.of(context);

  /// give access to Mediaquery.of(context)
  static MediaQueryData get mediaquery => MediaQuery.of(context);

  /// give access to Theme.of(context).iconTheme.color
  static Color get iconColor => Theme.of(context).iconTheme.color;

  /// give access to MediaQuery.of(context).size.height
  static double get height => MediaQuery.of(context).size.height;

  /// give access to MediaQuery.of(context).size.width
  static double get width => MediaQuery.of(context).size.width;
}

/// It replaces the Flutter Navigator, but needs no context.
/// You can to use navigator.push(YourRoute()) rather Navigator.push(context, YourRoute());
NavigatorState get navigator => Get.key.currentState;