import 'package:flutter/cupertino.dart';
import 'package:get/get.dart';
import 'package:injectable/injectable.dart';
import 'package:keyboard/resource/string.gen.dart';

import '../../base/base_controller.dart';
import '../../data/bean/keyboard_guide_msg.dart';
import '../../utils/toast_util.dart';

/// 键盘引导页面Controller
@injectable
class KeyboardGuidePageController extends BaseController {
  /// TextField操作控制器
  final TextEditingController editingController = TextEditingController();

  /// ListView的滚动控制器
  final ScrollController scrollController = ScrollController();

  /// 输入框焦点
  final FocusNode inputFocusNode = FocusNode();

  /// 消息列表
  final RxList<KeyboardGuideMsg> msgList = <KeyboardGuideMsg>[].obs;

  @override
  void onInit() {
    super.onInit();
    inputFocusNode.addListener(_handleTextFieldFocusChange);
    // 初始化消息列表
    _initMsgList();
    // 进入页面，就获取输入框焦点
    // inputFocusNode.requestFocus();
  }

  @override
  void onClose() {
    // 取消监听
    inputFocusNode.removeListener(_handleTextFieldFocusChange);
    inputFocusNode.dispose();
    editingController.dispose();
    scrollController.dispose();
    super.onClose();
  }

  /// 关闭页面
  clickBack() {
    Get.back();
  }

  /// 发送消息
  void sendMsg(String msg) {
    if (msg.isEmpty) {
      ToastUtil.show("请输入要发送的消息内容");
      return;
    }
    //添加消息到列表中
    _addMsg2List(msg, true);
    // 延迟生成对方的回复消息
    // Future.delayed(const Duration(milliseconds: 150), () {
    //   //添加消息到列表中
    //   _addMsg2List(_replyMessage2Client(msg), false);
    // });
    //清除输入框的内容
    editingController.clear();
  }

  // /// 测试，生成回复消息
  // String _replyMessage2Client(String clientMsg) {
  //   return clientMsg
  //       .replaceAll("我", "你")
  //       .replaceAll("吗", "")
  //       .replaceAll("?", "!")
  //       .replaceAll("？", "！");
  // }

  /// 初始化消息列表
  void _initMsgList() {
    // 添加一些默认消息
    msgList.add(
      KeyboardGuideMsg(
        isMe: false,
        content: StringName.keyboardGuideTaReply1,
        createTime: DateTime.now().millisecond,
      ),
    );
    msgList.add(
      KeyboardGuideMsg(
        isMe: false,
        content: StringName.keyboardGuideTaReply2,
        createTime: DateTime.now().millisecond,
      ),
    );
    msgList.add(
      KeyboardGuideMsg(
        isMe: false,
        content: StringName.keyboardGuideTaReply3,
        createTime: DateTime.now().millisecond,
      ),
    );
  }

  /// 添加消息到消息列表中
  void _addMsg2List(String msg, bool isMe) {
    msgList.add(
      KeyboardGuideMsg(
        isMe: isMe,
        content: msg,
        createTime: DateTime.now().millisecond,
      ),
    );
    update();
    _scrollToBottom();
  }

  /// 滚动列表到底部
  void _scrollToBottom() {
    if (scrollController.hasClients) {
      scrollController.jumpTo(scrollController.position.maxScrollExtent);
    }
  }

  /// 处理输入框的焦点变化
  void _handleTextFieldFocusChange() {
    // 输入框获取焦点，滚动列表到底部
    if (inputFocusNode.hasFocus) {
      Future.delayed(const Duration(milliseconds: 350), () {
        _scrollToBottom();
      });
    }
  }
}