import 'package:flutter/material.dart';

import 'package:collection/collection.dart';
import 'package:sentry_flutter/sentry_flutter.dart';

import 'package:fluffychat/pangea/common/utils/error_handler.dart';

class OverlayListEntry {
  final OverlayEntry entry;
  final String? key;
  final bool canPop;
  final bool blockOverlay;

  OverlayListEntry(
    this.entry, {
    this.key,
    this.canPop = true,
    this.blockOverlay = false,
  });
}

class PangeaAnyState {
  final Map<String, LayerLinkAndKey> _layerLinkAndKeys = {};
  List<OverlayListEntry> entries = [];

  LayerLinkAndKey layerLinkAndKey(
    String transformTargetId, [
    throwErrorIfNotThere = false,
  ]) {
    if (_layerLinkAndKeys[transformTargetId] == null) {
      if (throwErrorIfNotThere) {
        Sentry.addBreadcrumb(Breadcrumb(data: _layerLinkAndKeys));
        throw Exception("layerLinkAndKey with null for $transformTargetId");
      } else {
        _layerLinkAndKeys[transformTargetId] = LayerLinkAndKey(
          transformTargetId,
        );
      }
    }

    return _layerLinkAndKeys[transformTargetId]!;
  }

  bool openOverlay(
    OverlayEntry entry,
    BuildContext context, {
    String? overlayKey,
    bool canPop = true,
    bool blockOverlay = false,
    bool rootOverlay = false,
  }) {
    if (entries.any((e) => e.blockOverlay)) {
      return false;
    }

    if (overlayKey != null &&
        entries.any((element) => element.key == overlayKey)) {
      return false;
    }

    entries.add(
      OverlayListEntry(
        entry,
        key: overlayKey,
        canPop: canPop,
        blockOverlay: blockOverlay,
      ),
    );

    Overlay.of(context, rootOverlay: rootOverlay).insert(entry);

    return true;
  }

  void closeOverlay([String? overlayKey]) {
    final entry = overlayKey != null
        ? entries.firstWhereOrNull((element) => element.key == overlayKey)
        : entries.lastWhereOrNull((element) => element.canPop);

    if (entry != null) {
      try {
        entry.entry.remove();
        entry.entry.dispose();
      } catch (err, s) {
        ErrorHandler.logError(e: err, s: s, data: {"overlay": entry});
      }
      entries.remove(entry);
    }
  }

  void closeAllOverlays({RegExp? filter, force = false}) {
    List<OverlayListEntry> shouldRemove = List.from(entries);
    if (!force) {
      shouldRemove = shouldRemove.where((element) => element.canPop).toList();
    }

    if (filter != null) {
      shouldRemove = shouldRemove
          .where((element) => element.key != null)
          .where((element) => filter.hasMatch(element.key!))
          .toList();
    }
    if (shouldRemove.isEmpty) return;

    for (int i = 0; i < shouldRemove.length; i++) {
      try {
        shouldRemove[i].entry.remove();
        shouldRemove[i].entry.dispose();
      } catch (err, s) {
        ErrorHandler.logError(e: err, s: s, data: {"overlay": shouldRemove[i]});
      }

      entries.remove(shouldRemove[i]);
    }
  }

  RenderBox? getRenderBox(String key) {
    final box =
        layerLinkAndKey(key).key.currentContext?.findRenderObject()
            as RenderBox?;
    return box?.hasSize == true ? box : null;
  }

  bool isOverlayOpen({RegExp? regex, String? overlayKey}) {
    return entries.any(
      (element) =>
          element.key != null &&
          (regex?.hasMatch(element.key!) == true || element.key == overlayKey),
    );
  }

  List<String> getMatchingOverlayKeys(RegExp regex) {
    return entries
        .where((e) => e.key != null)
        .where((element) => regex.hasMatch(element.key!))
        .map((e) => e.key)
        .whereType<String>()
        .toList();
  }
}

class LayerLinkAndKey {
  late LabeledGlobalKey key;
  late LayerLink link;
  String transformTargetId;

  LayerLinkAndKey(this.transformTargetId) {
    key = LabeledGlobalKey(transformTargetId);
    link = LayerLink();
  }

  Map<String, dynamic> toJson() => {
    "key": key.toString(),
    "link": link.toString(),
    "transformTargetId": transformTargetId,
  };

  @override
  operator ==(Object other) =>
      identical(this, other) ||
      other is LayerLinkAndKey &&
          runtimeType == other.runtimeType &&
          key == other.key &&
          link == other.link &&
          transformTargetId == other.transformTargetId;

  @override
  int get hashCode => key.hashCode ^ link.hashCode ^ transformTargetId.hashCode;
}