import 'dart:math' as math;

import 'package:flex_seed_scheme/flex_seed_scheme.dart';
import 'package:flutter/material.dart';

// TODO(rydmike): Investigate why we in this Flutter version suddenly need to
//  ignore discarded futures for AnimationController()..forward
// ignore_for_file: discarded_futures

const Duration _kUnconfirmedSplashDuration = Duration(milliseconds: 20);
const Duration _kSplashFadeDuration = Duration(milliseconds: 20);

/// Logical pixels
const double _kSplashInitialSize = 0.0;

/// pixels per millisecond
const double _kSplashConfirmedVelocity = 1000.0;

/// A visual reaction on a piece of [Material] to user input.
///
/// An immediate highlight ink feature whose origin starts at the input
/// touch point, but expands from touch point in zero duration for an immediate
/// highlight effect instead of ink.
///
/// This feature is a complete copy of Flutter SDK [InkSplash], but with the
/// splash timings and velocity adjusted. This could probably be made simpler,
/// but it is no worse than the [InkSplash] and a quick way to make
/// one that only has the ink highlight feature, without animated splash.
///
/// You can also use the NoSplash.splashFactory to defeat the default ink
/// splash drawn by an [InkWell] or [ButtonStyle]. It is similar to this
/// feature, but it animates the appearance of the tap highlight, whereas
/// [FlexInstantSplash] does not animate the appearance of the tap highlight,
/// it is instant.
///
/// This object is rarely created directly. Instead of creating an ink splash
/// directly, consider using an [InkResponse] or [InkWell] widget, which uses
/// gestures (such as tap and long-press) to trigger ink splashes.
///
/// See also:
///
///  * [InkRipple], which is an ink splash feature that expands more
///    aggressively than [InkSplash] class does.
///  * [InkResponse], which uses gestures to trigger ink highlights and ink
///    splashes in the parent [Material].
///  * [InkWell], which is a rectangular [InkResponse] (the most common type of
///    ink response).
///  * [Material], which is the widget on which the ink splash is painted.
///  * [InkHighlight], which is an ink feature that emphasizes a part of a
///    [Material].
///  * [Ink], a convenience widget for drawing images and other decorations on
///    Material widgets.
class FlexInstantSplash extends InteractiveInkFeature {
  /// Begin a splash, centered at position relative to [referenceBox].
  ///
  /// The [controller] argument is typically obtained via
  /// `Material.of(context)`.
  ///
  /// If `containedInkWell` is true, then the splash will be sized to fit
  /// the well rectangle, then clipped to it when drawn. The well
  /// rectangle is the box returned by `rectCallback`, if provided, or
  /// otherwise is the bounds of the [referenceBox].
  ///
  /// If `containedInkWell` is false, then `rectCallback` should be null.
  /// The ink splash is clipped only to the edges of the [Material].
  /// This is the default.
  ///
  /// When the splash is removed, `onRemoved` will be called.
  FlexInstantSplash({
    required MaterialInkController controller,
    required super.referenceBox,
    required TextDirection textDirection,
    Offset? position,
    required Color color,
    bool containedInkWell = false,
    RectCallback? rectCallback,
    BorderRadius? borderRadius,
    super.customBorder,
    double? radius,
    super.onRemoved,
  })  : _position = position,
        _borderRadius = borderRadius ?? BorderRadius.zero,
        _targetRadius = radius ??
            _getTargetRadius(
                referenceBox, containedInkWell, rectCallback, position!),
        _clipCallback =
            _getClipCallback(referenceBox, containedInkWell, rectCallback),
        _repositionToReferenceBox = !containedInkWell,
        _textDirection = textDirection,
        super(controller: controller, color: color) {
    _radiusController = AnimationController(
        duration: _kUnconfirmedSplashDuration, vsync: controller.vsync)
      ..addListener(controller.markNeedsPaint)
      ..forward();
    _radius = _radiusController.drive(Tween<double>(
      begin: _kSplashInitialSize,
      end: _targetRadius,
    ));
    _alphaController = AnimationController(
        duration: _kSplashFadeDuration, vsync: controller.vsync)
      ..addListener(controller.markNeedsPaint)
      ..addStatusListener(_handleAlphaStatusChanged);
    _alpha = _alphaController!.drive(IntTween(
      begin: color.alpha8bit,
      end: 0,
    ));

    controller.addInkFeature(this);
  }

  final Offset? _position;
  final BorderRadius _borderRadius;
  final double _targetRadius;
  final RectCallback? _clipCallback;
  final bool _repositionToReferenceBox;
  final TextDirection _textDirection;

  late Animation<double> _radius;
  late AnimationController _radiusController;

  late Animation<int> _alpha;
  AnimationController? _alphaController;

  /// Used to specify this type of ink splash for an [InkWell], [InkResponse],
  /// material [Theme], or [ButtonStyle].
  static const InteractiveInkFeatureFactory splashFactory =
      _InstantSplashFactory();

  @override
  void confirm() {
    final int duration = (_targetRadius / _kSplashConfirmedVelocity).floor();
    _radiusController
      ..duration = Duration(milliseconds: duration)
      ..forward();
    _alphaController!.forward();
  }

  // coverage:ignore-start
  @override
  void cancel() {
    _alphaController?.forward();
  }
  // coverage:ignore-end

  void _handleAlphaStatusChanged(AnimationStatus status) {
    if (status == AnimationStatus.completed) {
      dispose();
    }
  }

  @override
  void dispose() {
    _radiusController.dispose();
    _alphaController!.dispose();
    _alphaController = null;
    super.dispose();
  }

  @override
  void paintFeature(Canvas canvas, Matrix4 transform) {
    final Paint paint = Paint()..color = color.withAlpha(_alpha.value);
    Offset? center = _position;
    // coverage:ignore-start
    if (_repositionToReferenceBox) {
      center = Offset.lerp(center, referenceBox.size.center(Offset.zero),
          _radiusController.value);
    }
    // coverage:ignore-end
    paintInkCircle(
      canvas: canvas,
      transform: transform,
      paint: paint,
      center: center!,
      textDirection: _textDirection,
      radius: _radius.value,
      customBorder: customBorder,
      borderRadius: _borderRadius,
      clipCallback: _clipCallback,
    );
  }
}

RectCallback? _getClipCallback(
    RenderBox referenceBox, bool containedInkWell, RectCallback? rectCallback) {
  if (rectCallback != null) {
    return rectCallback;
  }
  if (containedInkWell) {
    return () => Offset.zero & referenceBox.size;
  }
  return null;
}

double _getTargetRadius(RenderBox referenceBox, bool containedInkWell,
    RectCallback? rectCallback, Offset position) {
  if (containedInkWell) {
    final Size size =
        rectCallback != null ? rectCallback().size : referenceBox.size;
    return _getSplashRadiusForPositionInSize(size, position);
  }
  return Material.defaultSplashRadius;
}

double _getSplashRadiusForPositionInSize(Size bounds, Offset position) {
  final double d1 = (position - bounds.topLeft(Offset.zero)).distance;
  final double d2 = (position - bounds.topRight(Offset.zero)).distance;
  final double d3 = (position - bounds.bottomLeft(Offset.zero)).distance;
  final double d4 = (position - bounds.bottomRight(Offset.zero)).distance;
  return math.max(math.max(d1, d2), math.max(d3, d4)).ceilToDouble();
}

class _InstantSplashFactory extends InteractiveInkFeatureFactory {
  const _InstantSplashFactory();

  @override
  InteractiveInkFeature create({
    required MaterialInkController controller,
    required RenderBox referenceBox,
    required Offset position,
    required Color color,
    required TextDirection textDirection,
    bool containedInkWell = false,
    RectCallback? rectCallback,
    BorderRadius? borderRadius,
    ShapeBorder? customBorder,
    double? radius,
    VoidCallback? onRemoved,
  }) {
    return FlexInstantSplash(
      controller: controller,
      referenceBox: referenceBox,
      position: position,
      color: color,
      containedInkWell: containedInkWell,
      rectCallback: rectCallback,
      borderRadius: borderRadius,
      customBorder: customBorder,
      radius: radius,
      onRemoved: onRemoved,
      textDirection: textDirection,
    );
  }
}
