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

import 'package:adaptive_dialog/adaptive_dialog.dart';
import 'package:file_picker_cross/file_picker_cross.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:future_loading_dialog/future_loading_dialog.dart';
import 'package:matrix/matrix.dart';
import 'package:vrouter/vrouter.dart';

import '../utils/resize_image.dart';
import '../widgets/matrix.dart';
import 'views/settings_emotes_view.dart';

class EmotesSettings extends StatefulWidget {
  const EmotesSettings({Key key}) : super(key: key);

  @override
  EmotesSettingsController createState() => EmotesSettingsController();
}

class EmotesSettingsController extends State<EmotesSettings> {
  String get roomId => VRouter.of(context).pathParameters['roomid'];
  Room get room =>
      roomId != null ? Matrix.of(context).client.getRoomById(roomId) : null;
  String get stateKey => VRouter.of(context).pathParameters['state_key'];

  bool showSave = false;
  TextEditingController newImageCodeController = TextEditingController();
  ValueNotifier<ImagePackImageContent> newImageController =
      ValueNotifier<ImagePackImageContent>(null);

  ImagePackContent _getPack() {
    final client = Matrix.of(context).client;
    final event = (room != null
            ? room.getState('im.ponies.room_emotes', stateKey ?? '')
            : client.accountData['im.ponies.user_emotes']) ??
        BasicEvent.fromJson(<String, dynamic>{
          'type': 'm.dummy',
          'content': <String, dynamic>{},
        });
    // make sure we work on a *copy* of the event
    return BasicEvent.fromJson(event.toJson()).parsedImagePackContent;
  }

  ImagePackContent _pack;
  ImagePackContent get pack {
    if (_pack != null) {
      return _pack;
    }
    _pack = _getPack();
    return _pack;
  }

  Future<void> _save(BuildContext context) async {
    if (readonly) {
      return;
    }
    final client = Matrix.of(context).client;
    if (room != null) {
      await showFutureLoadingDialog(
        context: context,
        future: () => client.setRoomStateWithKey(
            room.id, 'im.ponies.room_emotes', stateKey ?? '', pack.toJson()),
      );
    } else {
      await showFutureLoadingDialog(
        context: context,
        future: () => client.setAccountData(
            client.userID, 'im.ponies.user_emotes', pack.toJson()),
      );
    }
  }

  Future<void> setIsGloballyActive(bool active) async {
    if (room == null) {
      return;
    }
    final client = Matrix.of(context).client;
    final content = client.accountData['im.ponies.emote_rooms']?.content ??
        <String, dynamic>{};
    if (active) {
      if (content['rooms'] is! Map) {
        content['rooms'] = <String, dynamic>{};
      }
      if (content['rooms'][room.id] is! Map) {
        content['rooms'][room.id] = <String, dynamic>{};
      }
      if (content['rooms'][room.id][stateKey ?? ''] is! Map) {
        content['rooms'][room.id][stateKey ?? ''] = <String, dynamic>{};
      }
    } else if (content['rooms'] is Map && content['rooms'][room.id] is Map) {
      content['rooms'][room.id].remove(stateKey ?? '');
    }
    // and save
    await showFutureLoadingDialog(
      context: context,
      future: () => client.setAccountData(
          client.userID, 'im.ponies.emote_rooms', content),
    );
    setState(() => null);
  }

  void removeImageAction(String oldImageCode) => setState(() {
        pack.images.remove(oldImageCode);
        showSave = true;
      });

  void submitImageAction(
    String oldImageCode,
    String imageCode,
    ImagePackImageContent image,
    TextEditingController controller,
  ) {
    if (pack.images.keys.any((k) => k == imageCode && k != oldImageCode)) {
      controller.text = oldImageCode;
      showOkAlertDialog(
        useRootNavigator: false,
        context: context,
        message: L10n.of(context).emoteExists,
        okLabel: L10n.of(context).ok,
      );
      return;
    }
    if (!RegExp(r'^[-\w]+$').hasMatch(imageCode)) {
      controller.text = oldImageCode;
      showOkAlertDialog(
        useRootNavigator: false,
        context: context,
        message: L10n.of(context).emoteInvalid,
        okLabel: L10n.of(context).ok,
      );
      return;
    }
    setState(() {
      pack.images[imageCode] = image;
      pack.images.remove(oldImageCode);
      showSave = true;
    });
  }

  bool isGloballyActive(Client client) =>
      room != null &&
      client.accountData['im.ponies.emote_rooms']?.content is Map &&
      client.accountData['im.ponies.emote_rooms'].content['rooms'] is Map &&
      client.accountData['im.ponies.emote_rooms'].content['rooms'][room.id]
          is Map &&
      client.accountData['im.ponies.emote_rooms'].content['rooms'][room.id]
          [stateKey ?? ''] is Map;

  bool get readonly =>
      room == null ? false : !(room.canSendEvent('im.ponies.room_emotes'));

  void saveAction() async {
    await _save(context);
    setState(() {
      showSave = false;
    });
  }

  void addImageAction() async {
    if (newImageCodeController.text == null ||
        newImageCodeController.text.isEmpty ||
        newImageController.value == null) {
      await showOkAlertDialog(
        useRootNavigator: false,
        context: context,
        message: L10n.of(context).emoteWarnNeedToPick,
        okLabel: L10n.of(context).ok,
      );
      return;
    }
    final imageCode = newImageCodeController.text;
    if (pack.images.containsKey(imageCode)) {
      await showOkAlertDialog(
        useRootNavigator: false,
        context: context,
        message: L10n.of(context).emoteExists,
        okLabel: L10n.of(context).ok,
      );
      return;
    }
    if (!RegExp(r'^[-\w]+$').hasMatch(imageCode)) {
      await showOkAlertDialog(
        useRootNavigator: false,
        context: context,
        message: L10n.of(context).emoteInvalid,
        okLabel: L10n.of(context).ok,
      );
      return;
    }
    pack.images[imageCode] = newImageController.value;
    await _save(context);
    setState(() {
      newImageCodeController.text = '';
      newImageController.value = null;
      showSave = false;
    });
  }

  static const maxImageWidth = 1600;

  void imagePickerAction(
      ValueNotifier<ImagePackImageContent> controller) async {
    final result =
        await FilePickerCross.importFromStorage(type: FileTypeCross.image);
    if (result == null) return;
    var file = MatrixImageFile(
      bytes: result.toUint8List(),
      name: result.fileName,
    );
    try {
      file = await resizeImage(file, max: maxImageWidth);
    } catch (_) {
      // do nothing
    }
    final uploadResp = await showFutureLoadingDialog(
      context: context,
      future: () => Matrix.of(context).client.uploadContent(file.bytes,
          filename: file.name, contentType: file.mimeType),
    );
    if (uploadResp.error == null) {
      setState(() {
        final info = <String, dynamic>{
          ...file.info,
        };
        // normalize width / height to 256, required for stickers
        if (info['w'] is int && info['h'] is int) {
          final ratio = info['w'] / info['h'];
          if (info['w'] > info['h']) {
            info['w'] = 256;
            info['h'] = (256.0 / ratio).round();
          } else {
            info['h'] = 256;
            info['w'] = (ratio * 256.0).round();
          }
        }
        controller.value = ImagePackImageContent.fromJson(<String, dynamic>{
          'url': uploadResp.result.toString(),
          'info': info,
        });
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return EmotesSettingsView(this);
  }
}