import 'package:extended_text/extended_text.dart';
import 'package:extended_text_field/extended_text_field.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:provider/provider.dart';
import 'package:yumi/app/config/business_logic_strategy.dart';
import 'package:yumi/app/constants/sc_emoji_datas.dart';
import 'package:yumi/app/constants/sc_global_config.dart';
import 'package:yumi/app/constants/sc_room_msg_type.dart';
import 'package:yumi/app/constants/sc_screen.dart';
import 'package:yumi/app_localizations.dart';
import 'package:yumi/services/audio/rtc_manager.dart';
import 'package:yumi/services/audio/rtm_manager.dart';
import 'package:yumi/shared/business_logic/usecases/sc_case.dart';
import 'package:yumi/shared/data_sources/sources/local/user_manager.dart';
import 'package:yumi/shared/tools/sc_keybord_util.dart';
import 'package:yumi/ui_kit/widgets/room/room_msg_item.dart';

///聊天输入框
class RoomMsgInput extends StatefulWidget {
  final String? atTextContent;

  const RoomMsgInput({super.key, this.atTextContent});

  @override
  State<RoomMsgInput> createState() => _RoomMsgInputState();
}

class _RoomMsgInputState extends State<RoomMsgInput> {
  bool showSend = false;
  bool showEmoji = false;

  final FocusNode msgNode = FocusNode();
  final TextEditingController controller = TextEditingController();

  BusinessLogicStrategy get _strategy => SCGlobalConfig.businessLogicStrategy;
  Color get _panelBackgroundColor => Colors.white24;

  @override
  void initState() {
    super.initState();
    if (widget.atTextContent != null) {
      controller.value = TextEditingValue(text: widget.atTextContent ?? "");
      showSend = controller.text.trim().isNotEmpty;
    }
  }

  @override
  void dispose() {
    controller.dispose();
    msgNode.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final keyboardHeight = MediaQuery.of(context).viewInsets.bottom;
    return Scaffold(
      backgroundColor: Colors.transparent,
      resizeToAvoidBottomInset: false,
      body: Column(
        children: <Widget>[
          Expanded(
            child: GestureDetector(
              behavior: HitTestBehavior.opaque,
              onTap: () {
                Navigator.pop(context);
              },
            ),
          ),
          AnimatedPadding(
            duration: const Duration(milliseconds: 220),
            curve: Curves.easeOut,
            padding: EdgeInsets.only(bottom: keyboardHeight),
            child: _buildBottomPanel(context),
          ),
        ],
      ),
    );
  }

  Widget _buildBottomPanel(BuildContext context) {
    return Container(
      color: Colors.black,
      child: SafeArea(
        top: false,
        child: Padding(
          padding: EdgeInsets.fromLTRB(25.w, 12.w, 25.w, 12.w),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              Row(
                crossAxisAlignment: CrossAxisAlignment.center,
                children: [
                  GestureDetector(
                    behavior: HitTestBehavior.opaque,
                    onTap: _toggleEmojiPanel,
                    child: SizedBox(
                      width: 24.w,
                      height: 24.w,
                      child: Image.asset(
                        showEmoji
                            ? _strategy.getSCMessageChatPageChatKeyboardIcon()
                            : _strategy.getSCMessageChatPageEmojiIcon(),
                        color: Colors.white,
                        fit: BoxFit.contain,
                      ),
                    ),
                  ),
                  SizedBox(width: 15.w),
                  Expanded(child: _buildInputBar(context)),
                ],
              ),
              if (showEmoji) SizedBox(height: 12.w),
              if (showEmoji) _buildEmojiPanel(),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildInputBar(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
        color: _panelBackgroundColor,
        borderRadius: BorderRadius.circular(height(5)),
      ),
      child: Row(
        children: [
          Expanded(
            child: ExtendedTextField(
              controller: controller,
              textDirection:
                  widget.atTextContent != null ? TextDirection.ltr : null,
              specialTextSpanBuilder: AtTextSpanBuilder(),
              focusNode: msgNode,
              autofocus: true,
              textInputAction: TextInputAction.send,
              onTap: () {
                if (showEmoji) {
                  setState(() {
                    showEmoji = false;
                  });
                }
              },
              onSubmitted: (_) {
                _sendMessage();
              },
              onChanged: (s) {
                setState(() {
                  showSend = controller.text.trim().isNotEmpty;
                });
              },
              decoration: InputDecoration(
                hintText: SCAppLocalizations.of(context)!.pleaseChatFfriendly,
                fillColor: Colors.transparent,
                hintStyle: TextStyle(color: Colors.white60, fontSize: sp(14)),
                contentPadding: EdgeInsets.symmetric(horizontal: 15.w),
                counterText: '',
                isDense: true,
                filled: false,
                focusColor: Colors.transparent,
                hoverColor: Colors.transparent,
                border: InputBorder.none,
                enabledBorder: InputBorder.none,
                focusedBorder: InputBorder.none,
                disabledBorder: InputBorder.none,
                errorBorder: InputBorder.none,
                focusedErrorBorder: InputBorder.none,
              ),
              style: TextStyle(
                fontSize: ScreenUtil().setSp(14),
                color: Colors.white,
              ),
            ),
          ),
          GestureDetector(
            behavior: HitTestBehavior.opaque,
            onTap: _sendMessage,
            child: Opacity(
              opacity: showSend ? 1 : 0.5,
              child: Container(
                padding: EdgeInsets.all(4.w),
                width: 30.w,
                height: 30.w,
                child: Image.asset(
                  "sc_images/room/sc_icon_room_message_send.png",
                ),
              ),
            ),
          ),
          SizedBox(width: 3.w),
        ],
      ),
    );
  }

  Widget _buildEmojiPanel() {
    return Container(
      height: 150.w,
      decoration: BoxDecoration(
        color: _panelBackgroundColor,
        borderRadius: BorderRadius.circular(height(5)),
      ),
      child: GridView.builder(
        padding: EdgeInsets.symmetric(horizontal: 15.w, vertical: 10.w),
        gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: 8,
          crossAxisSpacing: 8.w,
          mainAxisSpacing: 8.w,
        ),
        itemCount: SCEmojiDatas.smileys.length,
        itemBuilder: (context, index) {
          final emoji = SCEmojiDatas.smileys[index];
          return GestureDetector(
            behavior: HitTestBehavior.opaque,
            onTap: () {
              _insertEmoji(emoji);
            },
            child: Center(
              child: ExtendedText(emoji, style: TextStyle(fontSize: sp(15))),
            ),
          );
        },
      ),
    );
  }

  void _toggleEmojiPanel() {
    if (showEmoji) {
      setState(() {
        showEmoji = false;
      });
      FocusScope.of(context).requestFocus(msgNode);
      return;
    }

    SCKeybordUtil.hide(context);
    setState(() {
      showEmoji = true;
    });
  }

  void _insertEmoji(String emoji) {
    final value = controller.value;
    final selection = value.selection;
    final fallbackOffset = value.text.length;
    final start = selection.isValid ? selection.start : fallbackOffset;
    final end = selection.isValid ? selection.end : fallbackOffset;
    final safeStart = start < 0 ? fallbackOffset : start;
    final safeEnd = end < 0 ? fallbackOffset : end;
    final nextText = value.text.replaceRange(safeStart, safeEnd, emoji);

    controller.value = value.copyWith(
      text: nextText,
      selection: TextSelection.collapsed(offset: safeStart + emoji.length),
      composing: TextRange.empty,
    );

    setState(() {
      showSend = controller.text.trim().isNotEmpty;
    });
  }

  void _sendMessage() {
    if (controller.text.trim().isEmpty) {
      return;
    }

    final rtcProvider = Provider.of<RtcProvider>(context, listen: false);
    final currenRoom = rtcProvider.currenRoom;
    if (currenRoom == null) {
      return;
    }

    Provider.of<RtmProvider>(context, listen: false).dispatchMessage(
      Msg(
        groupId: currenRoom.roomProfile?.roomProfile?.roomAccount ?? "",
        role: rtcProvider.currenRoom?.entrants?.roles ?? "",
        msg: controller.text,
        type: SCRoomMsgType.text,
        user: AccountStorage().getCurrentUser()?.userProfile,
      ),
    );
    Navigator.pop(context);
  }
}

class PopRoute extends PopupRoute {
  final Duration _duration = Duration(milliseconds: 350);
  Widget child;

  PopRoute({required this.child});

  @override
  Color? get barrierColor => null;

  @override
  bool get barrierDismissible => true;

  @override
  String? get barrierLabel => null;

  @override
  Widget buildPage(
    BuildContext context,
    Animation<double> animation,
    Animation<double> secondaryAnimation,
  ) {
    return child;
  }

  @override
  Duration get transitionDuration => _duration;
}