import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:get/get.dart';
import 'package:PiliPlus/http/video.dart';
import 'package:PiliPlus/models/common/reply_type.dart';
import 'package:PiliPlus/models/video/reply/emote.dart';
import 'package:PiliPlus/models/video/reply/item.dart';
import 'package:PiliPlus/pages/emote/index.dart';
import 'package:PiliPlus/utils/feed_back.dart';
import 'package:get/get_rx/src/rx_workers/utils/debouncer.dart';

import 'toolbar_icon_button.dart';

class VideoReplyNewDialog extends StatefulWidget {
  final int? oid;
  final int? root;
  final int? parent;
  final ReplyType? replyType;
  final ReplyItemModel? replyItem;

  const VideoReplyNewDialog({
    super.key,
    this.oid,
    this.root,
    this.parent,
    this.replyType,
    this.replyItem,
  });

  @override
  State<VideoReplyNewDialog> createState() => _VideoReplyNewDialogState();
}

class _VideoReplyNewDialogState extends State<VideoReplyNewDialog>
    with WidgetsBindingObserver {
  final TextEditingController _replyContentController = TextEditingController();
  final FocusNode replyContentFocusNode = FocusNode();
  final GlobalKey _formKey = GlobalKey<FormState>();
  late double emoteHeight = 0.0;
  double keyboardHeight = 0.0; // 键盘高度
  final _debouncer =
      Debouncer(delay: const Duration(milliseconds: 200)); // 设置延迟时间
  String toolbarType = 'input';
  bool _enablePublish = false;
  final _publishStream = StreamController<bool>();

  @override
  void initState() {
    super.initState();
    // 监听输入框聚焦
    // replyContentFocusNode.addListener(_onFocus);
    // 界面观察者 必须
    WidgetsBinding.instance.addObserver(this);
    // 自动聚焦
    _autoFocus();
    // 监听聚焦状态
    _focusListener();
  }

  _autoFocus() async {
    await Future.delayed(const Duration(milliseconds: 300));
    if (context.mounted) {
      FocusScope.of(context).requestFocus(replyContentFocusNode);
    }
  }

  _focusListener() {
    replyContentFocusNode.addListener(() {
      if (replyContentFocusNode.hasFocus) {
        setState(() {
          toolbarType = 'input';
        });
      }
    });
  }

  Future submitReplyAdd() async {
    feedBack();
    String message = _replyContentController.text;
    var result = await VideoHttp.replyAdd(
      type: widget.replyType ?? ReplyType.video,
      oid: widget.oid!,
      root: widget.root!,
      parent: widget.parent!,
      message: widget.replyItem != null && widget.replyItem!.root != 0
          ? ' 回复 @${widget.replyItem!.member!.uname!} : $message'
          : message,
    );
    if (result['status']) {
      SmartDialog.showToast(result['data']['success_toast']);
      Get.back(result: {
        'data': ReplyItemModel.fromJson(result['data']['reply'], ''),
      });
    } else {
      SmartDialog.showToast(result['msg']);
    }
  }

  void onChooseEmote(Packages package, Emote emote) {
    if (!_enablePublish) {
      _enablePublish = true;
      _publishStream.add(true);
    }
    final int cursorPosition = _replyContentController.selection.baseOffset;
    final String currentText = _replyContentController.text;
    final String newText = currentText.substring(0, cursorPosition) +
        emote.text! +
        currentText.substring(cursorPosition);
    _replyContentController.value = TextEditingValue(
      text: newText,
      selection:
          TextSelection.collapsed(offset: cursorPosition + emote.text!.length),
    );
  }

  @override
  void didChangeMetrics() {
    super.didChangeMetrics();
    if (!mounted) return;
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (!mounted) return;
      // 键盘高度
      final viewInsets = EdgeInsets.fromViewPadding(
          View.of(context).viewInsets, View.of(context).devicePixelRatio);
      _debouncer(() {
        if (!mounted) return;
        if (keyboardHeight == 0 && emoteHeight == 0) {
          emoteHeight = keyboardHeight =
              keyboardHeight == 0.0 ? viewInsets.bottom : keyboardHeight;
          if (emoteHeight < 200) emoteHeight = 200;
          setState(() {});
        }
      });
    });
  }

  @override
  void dispose() {
    _publishStream.close();
    WidgetsBinding.instance.removeObserver(this);
    _replyContentController.dispose();
    replyContentFocusNode.removeListener(() {});
    replyContentFocusNode.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    double _keyboardHeight = EdgeInsets.fromViewPadding(
            View.of(context).viewInsets, View.of(context).devicePixelRatio)
        .bottom;
    return Container(
      clipBehavior: Clip.hardEdge,
      decoration: BoxDecoration(
        borderRadius: const BorderRadius.only(
          topLeft: Radius.circular(12),
          topRight: Radius.circular(12),
        ),
        color: Theme.of(context).colorScheme.surface,
      ),
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Container(
            padding:
                const EdgeInsets.only(top: 12, right: 15, left: 15, bottom: 10),
            child: SingleChildScrollView(
              child: Form(
                key: _formKey,
                autovalidateMode: AutovalidateMode.onUserInteraction,
                child: TextField(
                  controller: _replyContentController,
                  minLines: 4,
                  maxLines: 8,
                  autofocus: false,
                  onChanged: (value) {
                    if (value.isNotEmpty && !_enablePublish) {
                      _enablePublish = true;
                      _publishStream.add(true);
                    } else if (value.isEmpty && _enablePublish) {
                      _enablePublish = false;
                      _publishStream.add(false);
                    }
                  },
                  focusNode: replyContentFocusNode,
                  decoration: const InputDecoration(
                      hintText: "输入回复内容",
                      border: InputBorder.none,
                      hintStyle: TextStyle(
                        fontSize: 14,
                      )),
                  style: Theme.of(context).textTheme.bodyLarge,
                ),
              ),
            ),
          ),
          Divider(
            height: 1,
            color: Theme.of(context).dividerColor.withOpacity(0.1),
          ),
          Container(
            height: 52,
            padding: const EdgeInsets.only(left: 12, right: 12),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                ToolbarIconButton(
                  tooltip: '输入',
                  onPressed: () {
                    if (toolbarType == 'emote') {
                      setState(() {
                        toolbarType = 'input';
                      });
                    }
                    FocusScope.of(context).requestFocus(replyContentFocusNode);
                  },
                  icon: const Icon(Icons.keyboard, size: 22),
                  // toolbarType: toolbarType,
                  selected: toolbarType == 'input',
                ),
                const SizedBox(width: 20),
                ToolbarIconButton(
                  tooltip: '表情',
                  onPressed: () {
                    if (toolbarType == 'input') {
                      setState(() {
                        toolbarType = 'emote';
                      });
                    }
                    FocusScope.of(context).unfocus();
                  },
                  icon: const Icon(Icons.emoji_emotions, size: 22),
                  // toolbarType: toolbarType,
                  selected: toolbarType == 'emote',
                ),
                const Spacer(),
                StreamBuilder(
                  initialData: false,
                  stream: _publishStream.stream,
                  builder: (context, snapshot) => FilledButton.tonal(
                    onPressed: snapshot.data == true ? submitReplyAdd : null,
                    style: FilledButton.styleFrom(
                      padding: const EdgeInsets.symmetric(
                          horizontal: 20, vertical: 10),
                      visualDensity: const VisualDensity(
                        horizontal: -2,
                        vertical: -2,
                      ),
                    ),
                    child: const Text('发送'),
                  ),
                ),
              ],
            ),
          ),
          AnimatedSize(
            curve: Curves.easeInOut,
            duration: const Duration(milliseconds: 300),
            child: SizedBox(
              width: double.infinity,
              height: toolbarType == 'input'
                  ? (_keyboardHeight > keyboardHeight
                      ? _keyboardHeight
                      : keyboardHeight)
                  : emoteHeight,
              child: EmotePanel(onChoose: onChooseEmote),
            ),
          ),
          if (toolbarType == 'input' && keyboardHeight == 0.0)
            SizedBox(
              width: double.infinity,
              height: MediaQuery.of(context).padding.bottom,
            )
        ],
      ),
    );
  }
}