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/toast_util.dart';

import '../../base/base_page.dart';
import '../../data/model/keyboard_guide_msg.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';

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

  static void start() {
    Get.toNamed(RoutePath.keyboardGuide);
  }

  @override
  immersive() {
    return false;
  }

  @override
  Widget buildBody(BuildContext context) {
    return Scaffold(
      backgroundColor: backgroundColor(),
      body: Column(
        children: [
          // 标题栏
          _buildTitleBar(),
          // 消息列表
          Expanded(
            flex: 1,
            child: Obx(() {
              return ListView.builder(
                controller: controller.scrollController,
                itemCount: controller.msgList.length,
                itemBuilder: (BuildContext context, int index) {
                  return _buildMsgItem(controller.msgList[index]);
                },
              );
            }),
          ),
          // 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();
              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,
                    ),
                  ),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }

  /// 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: TextField(
                      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);
                      },
                      // 输入框焦点
                      focusNode: controller.inputFocusNode,
                      // 点击外部区域，关闭软键盘
                      onTapUpOutside: (event) {
                        controller.inputFocusNode.unfocus();
                      },
                      // 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 = 59.0;
    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: Row(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          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，才有复制按钮
            if (!msg.isMe)
              Padding(
                padding: EdgeInsets.only(left: 8.0),
                child: GestureDetector(
                  onTap: () {
                    // 复制内容到剪切板
                    ClipboardUtil.copyToClipboard(msg.content);
                  },
                  child: Assets.images.iconCopy.image(
                    width: 18.w,
                    height: 18.w,
                  ),
                ),
              ),
          ],
        ),
      ),
    );
  }

  /// 构建聊天消息列表项
  Widget _buildMsgItem(KeyboardGuideMsg msg) {
    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),
          // 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),
          // 聊天气泡
          _buildMsgBubble(msg),
        ],
      );
    }
    return Container(padding: const EdgeInsets.all(8.0), child: content);
  }

  /// 构建头像
  Widget _buildAvatar(KeyboardGuideMsg msg) {
    double avatarSize = 36.0;
    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 9.0),
      child: CircleAvatar(
        radius: 20,
        child:
            msg.isMe
                ? Assets.images.iconDefaultAvatar.image(
                  height: avatarSize,
                  width: avatarSize,
                )
                : Assets.images.iconTaAvatar.image(
                  height: avatarSize,
                  width: avatarSize,
                ),
      ),
    );
  }
}