import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:get/get.dart';
import 'package:keyboard/module/keyboard_guide/keyboard_guide_controller.dart';
import 'package:keyboard/router/app_pages.dart';
import 'package:keyboard/utils/default_keyboard_helper.dart';
import 'package:keyboard/utils/keyboard_guide_record_util.dart' show KeyboardGuideRecordUtil;
import 'package:keyboard/utils/method_chanel_ios_util.dart';
import 'package:keyboard/utils/toast_util.dart';
import 'package:keyboard/widget/platform_util.dart';
import 'package:lottie/lottie.dart';

import '../../base/base_page.dart';
import '../../data/bean/keyboard_guide_msg.dart';
import '../../data/consts/event_report.dart';
import '../../handler/event_handler.dart';
import '../../resource/assets.gen.dart';
import '../../resource/colors.gen.dart';
import '../../resource/string.gen.dart';
import '../../utils/clipboard_util.dart';
import '../../utils/url_launcher_util.dart';
import '../../widget/ai/ai_generate_tip_widget.dart';
import '../../widget/app_lifecycle_widget.dart';
import '../intimacy_scale/intimacy_scale_page.dart';
import 'enums/keyboard_guide_msg_type.dart';

/// 键盘引导页面
class KeyboardGuidePage extends BasePage<KeyboardGuidePageController> {
  const KeyboardGuidePage({super.key});

  /// 跳转到键盘引导页
  static void start() {
    Get.toNamed(RoutePath.keyboardGuide);
  }

  /// 跳转并关闭当前页
  static void startAndOffMe() {
    Get.offNamed(RoutePath.keyboardGuide);
  }

  @override
  immersive() {
    return false;
  }

  @override
  Widget buildBody(BuildContext context) {
    return Scaffold(
      backgroundColor: backgroundColor(),
      body: AppLifecycleWidget(
        onAppLifecycleCallback: (isForeground) {
          // 完成教程
          controller.setNotFirstShowKeyboardTutorial();
          if (isForeground) {
            // 切换到前台时，重新检查设置，更新按钮状态
            controller.checkSetting();
            // 如果选择为默认键盘了，则尝试显示引导弹窗
            if (controller.isDefaultKeyboard.value && KeyboardGuideRecordUtil.isFirstShowKeyboardGuide()) {
              controller.showGuideOverlayDialog();
            }
          }
        },
        child: Column(
          children: [
            // 使用 Obx 监听 isDefaultKeyboard 的变化
            Obx(() {
              // 当 isDefaultKeyboard 变为 true 时，显示引导对话框
              if (controller.isDefaultKeyboard.value) {
                // 使用 Future.microtask 确保在构建完成后调用
                Future.microtask(() => controller.showGuideOverlayDialog());
              }
              // 返回一个空的 SizedBox，不影响 UI
              return SizedBox.shrink();
            }),
            // 标题栏
            _buildTitleBar(),
            // 消息列表
            Expanded(flex: 1, child: _buildContent()),
            // 底部输入栏
            _buildBottomInput(),
          ],
        ),
      ),
    );
  }

  // 标题栏
  Widget _buildTitleBar() {
    return Container(
      color: backgroundColor(),
      height: kToolbarHeight,
      padding: EdgeInsets.symmetric(horizontal: 16.0),
      child: Row(
        children: [
          // 返回按钮
          GestureDetector(
            onTap: controller.clickBack,
            child: Assets.images.iconMineBackArrow.image(
              width: 24.w,
              height: 24.h,
            ),
          ),
          // 标题
          Expanded(
            child: Container(
              alignment: Alignment.center,
              child: Text("", style: const TextStyle(fontSize: 18)),
            ),
          ),
          // 右侧按钮
          GestureDetector(
            onTap: () async {
              bool result = await UrlLauncherUtil.openWeChat();
              EventHandler.report(EventId.event_03007);
              if (!result) {
                ToastUtil.show(StringName.keyboardGuideWechatNotInstall);
              }
            },
            child: Container(
              padding: EdgeInsets.only(
                left: 12.w,
                right: 14.w,
                top: 10.w,
                bottom: 10.w,
              ),
              decoration: BoxDecoration(
                image: DecorationImage(
                  image: Assets.images.bgGoApp.provider(),
                  fit: BoxFit.fill,
                ),
              ),
              child: Row(
                children: [
                  Assets.images.iconWechat.image(height: 22.w, width: 22.w),
                  SizedBox(width: 1.0),
                  Text(
                    StringName.keyboardGuideGoWechat,
                    style: TextStyle(
                      color: ColorName.black80,
                      fontSize: 12,
                      fontWeight: FontWeight.w400,
                    ),
                  ),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }

  /// 内容
  Widget _buildContent() {
    return Obx(() {
      // 选择了默认键盘，显示聊天列表
      if (controller.isDefaultKeyboard.value) {
        return _buildChatList();
      } else {
        // 未选择，显示引导动画
        return _buildGuideAnimation();
      }
    });
  }

  /// 引导动画
  Widget _buildGuideAnimation() {
    Widget animationWidget;
    if (PlatformUtil.isIOS) {
      animationWidget = Lottie.asset(
        Assets.anim.animKeyboardFloatingWindowChooseKeyboardIos,
        repeat: true,
      );
    } else if (PlatformUtil.isAndroid) {
      animationWidget = Lottie.asset(
        Assets.anim.animKeyboardFloatingWindowChooseKeyboardAndroid,
        repeat: true,
      );
    } else {
      animationWidget = SizedBox.shrink();
    }
    return Container(child: animationWidget);
  }

  /// 聊天列表
  Widget _buildChatList() {
    return Obx(() {
      return ListView.builder(
        controller: controller.scrollController,
        itemCount: controller.msgList.length + 1,
        itemBuilder: (BuildContext context, int index) {
          if (index == controller.msgList.length) {

            return (controller.msgList.length > 5)
                ? Container(

                  child: _buildAiGenerateTip(),
                )
                : SizedBox();
          }
          KeyboardGuideMsg msg = controller.msgList[index];
          return _buildMsgItem(msg, index);
        },
      );
    });
  }

  Widget _buildAiGenerateTip() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        AiGenerateTipWidget.normalTip(textColor: Colors.black.withAlpha(92)),
      ],
    );
  }

  /// 构建底部输入框
  Widget _buildBottomInput() {
    return Center(
      child: Column(
        children: [
          Container(
            color: ColorName.msgInputBar,
            padding: const EdgeInsets.symmetric(
              vertical: 11.0,
              horizontal: 12.0,
            ),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.start,
              children: [
                Expanded(
                  flex: 1,
                  // 输入框的圆角边框
                  child: Container(
                    decoration: BoxDecoration(
                      color: ColorName.white,
                      borderRadius: BorderRadius.circular(10.0),
                    ),
                    child: Obx(() {
                      return TextField(
                        // 是否可用，选择了默认键盘时，才可用
                        enabled:
                            controller.isIOS.value
                                ? true
                                : controller.isDefaultKeyboard.value,
                        // 是否自动获取焦点
                        autofocus: false,
                        style: TextStyle(
                          color: ColorName.black80,
                          fontSize: 14.0,
                          fontWeight: FontWeight.w500,
                        ),
                        // 设置光标颜色
                        cursorColor: ColorName.inputCursor,
                        // 光标宽度
                        cursorWidth: 2.0,
                        // 光标圆角
                        cursorRadius: Radius.circular(2),
                        // 设置按钮显示为发送
                        textInputAction: TextInputAction.send,
                        // 用户点击软键盘的发送按钮时，触发回调
                        onSubmitted: (value) {
                          var msg = controller.editingController.text;
                          controller.sendMsg(msg);
                          // 保持输入框焦点获取，不降下键盘
                          controller.requestInputFocus();
                        },
                        // 输入框焦点
                        focusNode: controller.inputFocusNode,
                        // 点击外部区域，关闭软键盘
                        onTapUpOutside: (event) {
                          // if (PlatformUtil.isIOS)  {
                          //   controller.clearInputFocus();
                          // }
                        },
                        // 输入框控制器
                        controller: controller.editingController,
                        decoration: InputDecoration(
                          // 提示文字
                          hintText: StringName.keyboardGuideInputHint,
                          hintStyle: TextStyle(
                            fontSize: 14.0,
                            fontWeight: FontWeight.w400,
                            color: ColorName.black40,
                          ),
                          // 去掉默认的边框
                          border: InputBorder.none,
                          // 设置输入框的内边距
                          contentPadding: EdgeInsets.symmetric(
                            horizontal: 9.0,
                            vertical: 13.0,
                          ),
                        ),
                      );
                    }),
                  ),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  /// 构建聊天气泡
  Widget _buildMsgBubble(KeyboardGuideMsg msg) {
    // 设置气泡的外边距，让气泡不易过长
    double marginValue = 35.0;
    EdgeInsets marginEdgeInsets;
    if (msg.isMe) {
      marginEdgeInsets = EdgeInsets.only(left: marginValue);
    } else {
      marginEdgeInsets = EdgeInsets.only(right: marginValue);
    }

    // 圆角大小
    double radiusSize = 14.0;
    // 背景圆角
    BorderRadius bgBorderRadius;
    if (msg.isMe) {
      bgBorderRadius = BorderRadius.only(
        topLeft: Radius.circular(radiusSize),
        topRight: Radius.circular(0),
        bottomLeft: Radius.circular(radiusSize),
        bottomRight: Radius.circular(radiusSize),
      );
    } else {
      bgBorderRadius = BorderRadius.only(
        topLeft: Radius.circular(0),
        topRight: Radius.circular(radiusSize),
        bottomLeft: Radius.circular(radiusSize),
        bottomRight: Radius.circular(0),
      );
    }

    // Flexible，文本超过一行时，自动换行，并且不超过最大宽度，不超过一行时，则自动包裹内容
    return Flexible(
      child: Container(
        padding: EdgeInsets.symmetric(vertical: 12.0, horizontal: 10.0),
        margin: marginEdgeInsets,
        decoration: BoxDecoration(
          color: msg.isMe ? ColorName.msgBubbleMe : ColorName.msgBubbleTa,
          borderRadius: bgBorderRadius,
        ),
        child: GestureDetector(
          onTap: () {
            // 复制内容到剪切板
            if (msg.type == KeyboardGuideMsgType.copy.type) {
              ClipboardUtil.copyToClipboard(msg.content);
              ToastUtil.show(StringName.copySuccess);
            } else if (msg.type == KeyboardGuideMsgType.intimacySetting.type) {
              // 跳转到亲密度设置页
              IntimacyScalePage.start();
            }
          },
          child: Row(
            // 宽高包裹内容
            mainAxisSize: MainAxisSize.min,
            // 图标和文本，垂直居中
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              Flexible(
                // 消息文本
                child: Text(
                  msg.content,
                  style: TextStyle(
                    fontSize: 14.0,
                    color: ColorName.black80,
                    fontWeight: FontWeight.w500,
                    height: 1.5,
                  ),
                  softWrap: true,
                ),
              ),
              // 只有对方发送的，才有操作按钮
              if (!msg.isMe)
                Visibility(
                  visible: msg.type != KeyboardGuideMsgType.normal.type,
                  child: Padding(
                    padding: EdgeInsets.only(left: 8.0),
                    child: _buildMsgActionBtn(msg),
                  ),
                ),
            ],
          ),
        ),
      ),
    );
  }

  /// 消息操作按钮
  Widget _buildMsgActionBtn(KeyboardGuideMsg msg) {
    if (msg.type == KeyboardGuideMsgType.copy.type) {
      return Assets.images.iconCopy.image(width: 18.w, height: 18.w);
    } else if (msg.type == KeyboardGuideMsgType.intimacySetting.type) {
      return Assets.images.iconSetting.image(width: 18.w, height: 18.w);
    } else {
      return SizedBox.shrink();
    }
  }

  /// 构建聊天消息列表项
  Widget _buildMsgItem(KeyboardGuideMsg msg, int index) {
    return Obx(() {
      Widget content;
      // 自己发的
      if (msg.isMe) {
        content = Row(
          // 如果是自己发的，则在右边
          mainAxisAlignment: MainAxisAlignment.end,
          // 顶部对齐
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            // 聊天气泡
            _buildMsgBubble(msg),
            SizedBox(width: 9.w),
            // 头像
            _buildAvatar(msg),
          ],
        );
      } else {
        // 对方发的
        content = Row(
          // 如果是自己发的，则在右边
          mainAxisAlignment: MainAxisAlignment.start,
          // 顶部对齐
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            // 头像
            _buildAvatar(msg),
            SizedBox(width: 9.w),
            // 聊天气泡
            _buildMsgBubble(msg),
          ],
        );
      }

      bool isTargetGuildMsg = controller.guideMsgIndex.value == index;

      return Container(
        margin: EdgeInsets.symmetric(horizontal: 16.w, vertical: 8.0.h),
        child:
            isTargetGuildMsg
                ? Container(key: controller.guideMsgGlobalKey, child: content)
                : content,
      );
    });
  }

  /// 构建头像
  Widget _buildAvatar(KeyboardGuideMsg msg) {
    double avatarSize = 36.0;
    return CircleAvatar(
      radius: 20,
      child:
          msg.isMe
              ? Assets.images.iconDefaultAvatar.image(
                height: avatarSize,
                width: avatarSize,
              )
              : Assets.images.iconTaAvatar.image(
                height: avatarSize,
                width: avatarSize,
              ),
    );
  }
}