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

import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:matrix/matrix.dart';

import 'package:fluffychat/utils/platform_infos.dart';
import 'package:fluffychat/widgets/layouts/max_width_body.dart';
import 'package:fluffychat/widgets/mxc_image.dart';
import '../../widgets/matrix.dart';
import 'settings_emotes.dart';

enum PopupMenuEmojiActions { import, export }

class EmotesSettingsView extends StatelessWidget {
  final EmotesSettingsController controller;

  const EmotesSettingsView(this.controller, {super.key});

  @override
  Widget build(BuildContext context) {
    final client = Matrix.of(context).client;
    final imageKeys = controller.pack!.images.keys.toList();
    return Scaffold(
      appBar: AppBar(
        leading: const Center(child: BackButton()),
        title: Text(L10n.of(context)!.customEmojisAndStickers),
        actions: [
          PopupMenuButton<PopupMenuEmojiActions>(
            onSelected: (value) {
              switch (value) {
                case PopupMenuEmojiActions.export:
                  controller.exportAsZip();
                  break;
                case PopupMenuEmojiActions.import:
                  controller.importEmojiZip();
                  break;
              }
            },
            enabled: !controller.readonly,
            itemBuilder: (context) => [
              PopupMenuItem(
                value: PopupMenuEmojiActions.import,
                child: Text(L10n.of(context)!.importFromZipFile),
              ),
              PopupMenuItem(
                value: PopupMenuEmojiActions.export,
                child: Text(L10n.of(context)!.exportEmotePack),
              ),
            ],
          ),
        ],
      ),
      floatingActionButton: controller.showSave
          ? FloatingActionButton(
              onPressed: controller.saveAction,
              child: const Icon(Icons.save_outlined, color: Colors.white),
            )
          : null,
      body: MaxWidthBody(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
            if (!controller.readonly)
              Container(
                padding: const EdgeInsets.symmetric(
                  vertical: 8.0,
                ),
                child: ListTile(
                  leading: Container(
                    width: 180.0,
                    height: 38,
                    padding: const EdgeInsets.symmetric(horizontal: 8),
                    decoration: BoxDecoration(
                      borderRadius: const BorderRadius.all(Radius.circular(10)),
                      color: Theme.of(context).secondaryHeaderColor,
                    ),
                    child: TextField(
                      controller: controller.newImageCodeController,
                      autocorrect: false,
                      minLines: 1,
                      maxLines: 1,
                      decoration: InputDecoration(
                        hintText: L10n.of(context)!.emoteShortcode,
                        prefixText: ': ',
                        suffixText: ':',
                        prefixStyle: TextStyle(
                          color: Theme.of(context).colorScheme.secondary,
                          fontWeight: FontWeight.bold,
                        ),
                        suffixStyle: TextStyle(
                          color: Theme.of(context).colorScheme.secondary,
                          fontWeight: FontWeight.bold,
                        ),
                        border: InputBorder.none,
                      ),
                    ),
                  ),
                  title: _ImagePicker(
                    controller: controller.newImageController,
                    onPressed: controller.imagePickerAction,
                  ),
                  trailing: InkWell(
                    onTap: controller.addImageAction,
                    child: const Icon(
                      Icons.add_outlined,
                      color: Colors.green,
                      size: 32.0,
                    ),
                  ),
                ),
              ),
            if (controller.room != null)
              SwitchListTile.adaptive(
                title: Text(L10n.of(context)!.enableEmotesGlobally),
                value: controller.isGloballyActive(client),
                onChanged: controller.setIsGloballyActive,
              ),
            if (!controller.readonly || controller.room != null)
              const Divider(thickness: 1),
            imageKeys.isEmpty
                ? Center(
                    child: Padding(
                      padding: const EdgeInsets.all(16),
                      child: Text(
                        L10n.of(context)!.noEmotesFound,
                        style: const TextStyle(fontSize: 20),
                      ),
                    ),
                  )
                : ListView.separated(
                    shrinkWrap: true,
                    physics: const NeverScrollableScrollPhysics(),
                    separatorBuilder: (BuildContext context, int i) =>
                        const SizedBox.shrink(),
                    itemCount: imageKeys.length + 1,
                    itemBuilder: (BuildContext context, int i) {
                      if (i >= imageKeys.length) {
                        return Container(height: 70);
                      }
                      final imageCode = imageKeys[i];
                      final image = controller.pack!.images[imageCode]!;
                      final textEditingController = TextEditingController();
                      textEditingController.text = imageCode;
                      final useShortCuts =
                          (PlatformInfos.isWeb || PlatformInfos.isDesktop);
                      return ListTile(
                        leading: Container(
                          width: 180.0,
                          height: 38,
                          padding: const EdgeInsets.symmetric(horizontal: 8),
                          decoration: BoxDecoration(
                            borderRadius:
                                const BorderRadius.all(Radius.circular(10)),
                            color: Theme.of(context).secondaryHeaderColor,
                          ),
                          child: Shortcuts(
                            shortcuts: !useShortCuts
                                ? {}
                                : {
                                    LogicalKeySet(LogicalKeyboardKey.enter):
                                        SubmitLineIntent(),
                                  },
                            child: Actions(
                              actions: !useShortCuts
                                  ? {}
                                  : {
                                      SubmitLineIntent: CallbackAction(
                                        onInvoke: (i) {
                                          controller.submitImageAction(
                                            imageCode,
                                            textEditingController.text,
                                            image,
                                            textEditingController,
                                          );
                                          return null;
                                        },
                                      ),
                                    },
                              child: TextField(
                                readOnly: controller.readonly,
                                controller: textEditingController,
                                autocorrect: false,
                                minLines: 1,
                                maxLines: 1,
                                decoration: InputDecoration(
                                  hintText: L10n.of(context)!.emoteShortcode,
                                  prefixText: ': ',
                                  suffixText: ':',
                                  prefixStyle: TextStyle(
                                    color:
                                        Theme.of(context).colorScheme.secondary,
                                    fontWeight: FontWeight.bold,
                                  ),
                                  suffixStyle: TextStyle(
                                    color:
                                        Theme.of(context).colorScheme.secondary,
                                    fontWeight: FontWeight.bold,
                                  ),
                                  border: InputBorder.none,
                                ),
                                onSubmitted: (s) =>
                                    controller.submitImageAction(
                                  imageCode,
                                  s,
                                  image,
                                  textEditingController,
                                ),
                              ),
                            ),
                          ),
                        ),
                        title: _EmoteImage(image.url),
                        trailing: controller.readonly
                            ? null
                            : InkWell(
                                onTap: () =>
                                    controller.removeImageAction(imageCode),
                                child: const Icon(
                                  Icons.delete_outlined,
                                  color: Colors.red,
                                  size: 32.0,
                                ),
                              ),
                      );
                    },
                  ),
          ],
        ),
      ),
    );
  }
}

class _EmoteImage extends StatelessWidget {
  final Uri mxc;

  const _EmoteImage(this.mxc);

  @override
  Widget build(BuildContext context) {
    const size = 38.0;
    return SizedBox.square(
      dimension: size,
      child: MxcImage(
        uri: mxc,
        fit: BoxFit.contain,
        width: size,
        height: size,
      ),
    );
  }
}

class _ImagePicker extends StatefulWidget {
  final ValueNotifier<ImagePackImageContent?> controller;

  final void Function(ValueNotifier<ImagePackImageContent?>) onPressed;

  const _ImagePicker({required this.controller, required this.onPressed});

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

class _ImagePickerState extends State<_ImagePicker> {
  @override
  Widget build(BuildContext context) {
    if (widget.controller.value == null) {
      return ElevatedButton(
        onPressed: () => widget.onPressed(widget.controller),
        child: Text(L10n.of(context)!.pickImage),
      );
    } else {
      return _EmoteImage(widget.controller.value!.url);
    }
  }
}

class SubmitLineIntent extends Intent {}