import 'package:fis_measure/interfaces/date_types/rect_region.dart';
import 'package:fis_measure/interfaces/enums/display_mode.dart';
import 'package:fis_measure/interfaces/process/modes/mode.dart';
import 'package:fis_measure/interfaces/enums/visual_area_type.dart';
import 'package:fis_common/event/event_type.dart';
import 'package:fis_measure/interfaces/process/viewports/viewport.dart';
import 'package:fis_measure/interfaces/process/visuals/visual.dart';
import 'package:fis_measure/interfaces/process/visuals/visual_area.dart';
import 'package:fis_measure/process/layout/configuration.dart';
import 'package:fis_measure/process/modes/mode_base.dart';
import 'package:flutter/foundation.dart';
import 'package:vid/us/vid_us_mode.dart';
import 'package:vid/us/vid_us_visual_area_type.dart';

abstract class VisualArea<T extends IViewPort> implements IVisualArea {
  bool _isActive = false;
  late final IVisual _visual;
  late final VidUsVisualAreaType _areaType;
  late final IMode _mode;
  IViewPort? _viewPort;
  RectRegion? _layoutRegion;
  RectRegion _displayRegion = RectRegion.fill(0, 0, 1, 1);

  VisualArea(
    IVisual visual,
    VidUsVisualAreaType areaType,
    VidUsModeType modeType,
  ) {
    _visual = visual;
    _areaType = areaType;
    _mode = matchAreaMode(modeType);
    loadData();
  }

  @override
  bool get isActive => _isActive;
  @override
  set isActive(bool value) {
    if (value != _isActive) {
      _isActive = value;
      isActiveChanged.emit(this, value);
    }
  }

  @override
  IMode get mode => _mode;

  @override
  IVisual get visual => _visual;

  @override
  IViewPort? get viewport => _viewPort;
  @override
  set viewport(IViewPort? value) {
    if (value != _viewPort) {
      _viewPort = value;
    }
  }

  @override
  RectRegion? get layoutRegion => _layoutRegion;
  @protected
  set layoutRegion(RectRegion? value) {
    if (value != _layoutRegion) {
      _layoutRegion = value;
      _updateDisplayRegion();
    }
  }

  set carotidLayoutRegioin(RectRegion? value) {
    if (value != _layoutRegion) {
      _layoutRegion = value;
    }
  }

  @override
  RectRegion get displayRegion => _displayRegion;

  @override
  VidUsVisualAreaType get visualAreaType => _areaType;

  @override
  var isActiveChanged = FEventHandler<bool>();

  /// 加载数据
  void loadData();

  @protected
  RectRegion findRegion(String section) {
    final displayMode =
        DisplayModeEnum.values[visual.visualData.displayMode.index];

    final rect = LayoutConfiguration.ins.getRect(
      section,
      VisualAreaTypeEnum.values[_areaType.index],
      displayMode,
    );
    final areaRegion = RectRegion.rect(rect);
    return areaRegion;
  }

  @protected
  ModeBase matchAreaMode(VidUsModeType type) {
    final modeInfo = visual.visualData.modes.firstWhere((e) => e.type == type);
    final mode = ModeBase(
      modeInfo.displayName,
      modeInfo.type,
      visual,
    );
    return mode;
  }

  void _updateDisplayRegion() {
    if (layoutRegion == null) {
      _displayRegion = RectRegion.fill(0, 0, 1, 1);
    }
    final parent = visual.region;
    final child = layoutRegion!;
    final x = parent.left + child.left * parent.width;
    final y = parent.top + child.top * parent.height;
    final width = child.width * parent.width;
    final height = child.height * parent.height;
    _displayRegion = RectRegion.fill(x, y, width, height);
  }
}