deepvoice_client/lib/modules/translation/views/translation_view.dart

import 'dart:ui';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import '../controllers/translation_controller.dart';
import '../models/translation_models.dart';
import '../views/translation_history_view.dart';
import '../bindings/translation_history_binding.dart';
import '../../../core/theme/app_colors.dart';
import '../../../routes/app_routes.dart';

// 导入拆分后的组件
import 'widgets/face_to_face_layout.dart'; // 面对面翻译布局
import 'widgets/draggable_floating_button.dart'; // 可拖拽的悬浮按钮
import 'dialogs/language_selection_dialog.dart'; // 语言选择对话框
import 'dialogs/translation_mode_selector.dart'; // 翻译模式选择器

// import 'package:intl/intl.dart';

//主页面
class TranslationView extends GetView<TranslationController> {
  const TranslationView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    final isDarkMode = Theme.of(context).brightness == Brightness.dark;

    return Obx(() {
      // 面对面翻译模式使用特殊布局
      if (controller.currentMode.value == 'faceToFace') {
        return _buildFaceToFaceScaffold(isDarkMode);
      }

      // 其他模式使用原有布局
      return Scaffold(
        backgroundColor:
            isDarkMode ? AppColors.darkBackground : Colors.grey[50],
        appBar: _buildAppBar(isDarkMode),
        body: Stack(
          children: [
            _buildBody(isDarkMode),
            // 可拖拽的悬浮按钮
            DraggableFloatingButton(
              isDarkMode: isDarkMode,
              controller: controller,
            ),
          ],
        ),
      );
    });
  }

  // 构建面对面翻译模式的专用Scaffold
  Widget _buildFaceToFaceScaffold(bool isDarkMode) {
    return Scaffold(
      backgroundColor: isDarkMode ? AppColors.darkBackground : Colors.grey[50],
      body: Stack(
        children: [
          // 主要内容区域
          FaceToFaceLayout(
            isDarkMode: isDarkMode,
            controller: controller,
          ),

          // 顶部按钮（倒过来）
          Positioned(
            top: 50.h,
            left: 0,
            right: 0,
            child: Transform.rotate(
              angle: 3.14159, // 180度旋转
              child: _buildFaceToFaceTopButton(isDarkMode),
            ),
          ),

          // 底部按钮
          Positioned(
            bottom: 40.h,
            left: 0,
            right: 0,
            child: _buildFaceToFaceBottomButton(isDarkMode),
          ),

          // 可拖拽的悬浮按钮 - 在所有模式下都显示
          DraggableFloatingButton(
            isDarkMode: isDarkMode,
            controller: controller,
          ),
        ],
      ),
    );
  }

  // 构建面对面翻译顶部按钮（原右边按钮，现在移到顶部并旋转）
  Widget _buildFaceToFaceTopButton(bool isDarkMode) {
    return Center(
      child: Transform.rotate(
        angle: 0, // 180度旋转
        child: _buildHoldToTalkButton(
          isDarkMode: isDarkMode,
          speakerId: 2, // 说话者2（原右边按钮）
          activeSpeaker: controller.activeSpeaker.value,
          icon: Icons.mic_none,
          label: controller.targetLanguage.value.split(' ')[0].tr, // 目标语言名称
        ),
      ),
    );
  }

  // 构建面对面翻译底部按钮（原左边按钮，保留在底部）
  Widget _buildFaceToFaceBottomButton(bool isDarkMode) {
    return Center(
      child: _buildHoldToTalkButton(
        isDarkMode: isDarkMode,
        speakerId: 1, // 说话者1（原左边按钮）
        activeSpeaker: controller.activeSpeaker.value,
        icon: Icons.mic_none,
        label: controller.sourceLanguage.value.split(' ')[0].tr, // 源语言名称
      ),
    );
  }

  PreferredSizeWidget _buildAppBar(bool isDarkMode) {
    return AppBar(
      backgroundColor: isDarkMode ? AppColors.cardBackground : Colors.white,
      elevation: 1,
      leading: IconButton(
        icon: Icon(
          Icons.arrow_back_ios,
          color: isDarkMode ? Colors.white : Colors.black,
          size: 20.sp,
        ),
        onPressed: () {
          // Stop recognition and TTS before navigating back
          controller.stopAll();
          Get.back();
        },
      ),
      title: Obx(() => GestureDetector(
            onTap: () {
              // 点击标题时弹出翻译模式选择器
              TranslationModeSelector.show(isDarkMode);
            },
            child: Text(
              controller.currentModeTitle.value.tr,
              style: TextStyle(
                fontSize: 18.sp,
                fontWeight: FontWeight.w600,
                color: isDarkMode ? Colors.white : Colors.black,
              ),
              overflow: TextOverflow.ellipsis,
              maxLines: 1,
            ),
          )),
      centerTitle: true,
      actions: [
        Obx(() {
          if (controller.isRecording.value) {
            // 录音中：显示红色计时器样式，点击可停止录音
            return Padding(
              padding: EdgeInsets.only(right: 16.w),
              child: GestureDetector(
                onTap: controller.toggleisRecord, // 点击结束录音
                child: Container(
                  padding: EdgeInsets.symmetric(horizontal: 8.w, vertical: 4.h),
                  decoration: BoxDecoration(
                    color: Colors.red,
                    borderRadius: BorderRadius.circular(20.r),
                  ),
                  child: Row(
                    children: [
                      Icon(
                        Icons.fiber_manual_record,
                        color: Colors.white,
                        size: 18.sp,
                      ),
                      SizedBox(width: 4.w),
                      Text(
                        controller.recordDurationText.value,
                        style: TextStyle(
                          color: Colors.white,
                          fontSize: 14.sp,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            );
          } else {
            // 未录音：显示红色录音按钮 + 文件夹按钮
            return Row(
              children: [
                IconButton(
                  icon: Icon(
                    Icons.radio_button_checked,
                    color: Colors.red,
                    size: 24.sp,
                  ),
                  onPressed: controller.toggleisRecord,
                  tooltip: 'enableRecording'.tr, // 是否开启录音
                ),
                IconButton(
                  icon: Icon(
                    Icons.folder,
                    color: isDarkMode ? Colors.white : Colors.black,
                    size: 24.sp,
                  ),
                  onPressed: () async {
                    await controller.stopAll();
                    Get.toNamed(Routes.translationList);
                    controller.setupScrollListener();
                  },
                  tooltip: 'viewAudioFiles'.tr, // 查看录音文件
                ),
                // 历史记录按钮
                // IconButton(
                //   icon: Icon(
                //     Icons.history,
                //     color: isDarkMode ? Colors.white : Colors.black,
                //     size: 24.sp,
                //   ),
                //   onPressed: () async {
                //     await controller.stopAll();
                //     Get.toNamed(Routes.translationHistory);
                //   },
                //   tooltip: 'translationHistory'.tr, // 翻译历史
                // ),
              ],
            );
          }
        }),
      ],
      bottom: PreferredSize(
        preferredSize: Size.fromHeight(50.h),
        child: Padding(
          padding: EdgeInsets.symmetric(horizontal: 16.w, vertical: 8.h),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              // 源语言选择
              Expanded(
                child: GestureDetector(
                  onTap: () => LanguageSelectionDialog.show(true, isDarkMode),
                  child: Container(
                    padding:
                        EdgeInsets.symmetric(horizontal: 8.w, vertical: 4.h),
                    decoration: BoxDecoration(
                      color: isDarkMode
                          ? Colors.white.withOpacity(0.1)
                          : Colors.grey[100],
                      borderRadius: BorderRadius.circular(16.r),
                    ),
                    child: Obx(() => Text(
                          '${controller.sourceLanguage.value.split(' ')[0]}'
                              .tr, // Just show the Chinese part
                          style: TextStyle(
                            fontSize: 16.sp,
                            fontWeight: FontWeight.w600,
                            color: isDarkMode ? Colors.white : Colors.black,
                          ),
                          textAlign: TextAlign.center,
                          overflow: TextOverflow.ellipsis,
                        )),
                  ),
                ),
              ),

              // 语言互换按钮
              GestureDetector(
                onTap: controller.swapLanguages,
                child: Container(
                  margin: EdgeInsets.symmetric(horizontal: 8.w),
                  padding: EdgeInsets.all(4.r),
                  decoration: BoxDecoration(
                    color: isDarkMode
                        ? AppColors.primary.withOpacity(0.2)
                        : Colors.blue[50],
                    shape: BoxShape.circle,
                  ),
                  child: Icon(
                    Icons.swap_horiz,
                    color: isDarkMode ? AppColors.primary : Colors.blue,
                    size: 20.sp,
                  ),
                ),
              ),

              // 目标语言选择
              Expanded(
                child: GestureDetector(
                  onTap: () => LanguageSelectionDialog.show(false, isDarkMode),
                  child: Container(
                    padding:
                        EdgeInsets.symmetric(horizontal: 8.w, vertical: 4.h),
                    decoration: BoxDecoration(
                      color: isDarkMode
                          ? Colors.white.withOpacity(0.1)
                          : Colors.grey[100],
                      borderRadius: BorderRadius.circular(16.r),
                    ),
                    child: Obx(() => Row(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: [
                            Flexible(
                              child: Text(
                                '${controller.targetLanguage.value.split(' ')[0]}'
                                    .tr,
                                style: TextStyle(
                                  fontSize: 16.sp,
                                  fontWeight: FontWeight.w600,
                                  color:
                                      isDarkMode ? Colors.white : Colors.black,
                                ),
                                textAlign: TextAlign.center,
                                overflow: TextOverflow.ellipsis,
                              ),
                            ),
                            //只在通话翻译模式下显示电话图标
                            if (controller.currentMode.value == 'call') ...[
                              SizedBox(width: 4.w),
                              Icon(
                                Icons.phone_in_talk,
                                size: 20.sp,
                                color: isDarkMode
                                    ? Colors.white70
                                    : Colors.grey[600],
                              ),
                            ],
                          ],
                        )),
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildBody(bool isDarkMode) {
    return GestureDetector(
      onPanUpdate: (details) {
        // 检测左滑手势
        if (details.delta.dx < -10) {
          // 左滑距离超过10像素时触发
          _handleSwipeLeft();
        }
      },
      child: Column(
        children: [
          Expanded(
            child: _buildTranslationContent(isDarkMode),
          ),
          _buildControlBar(isDarkMode),
        ],
      ),
    );
  }

  // 处理左滑手势
  void _handleSwipeLeft() async {
    await controller.stopAll();
    Get.toNamed(Routes.translationHistory);
  }

  Widget _buildTranslationContent(bool isDarkMode) {
    return Obx(() {
      // 其他模式使用原有的列表布局
      final itemCount = controller.translationHistory.length +
          (controller.hasMoreHistory.value ? 1 : 0);

      return ListView.builder(
        controller: controller.scrollController,
        reverse: true, // 🔑 关键优化：采用reverse模式，参考Agent模块
        padding: EdgeInsets.only(
          left: 16.w,
          right: 16.w,
          top: 16.h,
          bottom: 16.h,
        ),
        itemCount: itemCount,
        itemBuilder: (context, index) {
          // 如果是最后一项且有更多历史记录，显示加载指示器（reverse模式下）
          if (index == controller.translationHistory.length &&
              controller.hasMoreHistory.value) {
            return _buildLoadMoreIndicator();
          }

          // reverse模式下需要反转索引来获取正确的历史记录
          final historyIndex = controller.translationHistory.length - 1 - index;

          // 检查索引是否有效（reverse模式下的索引验证）
          if (historyIndex < 0 ||
              historyIndex >= controller.translationHistory.length) {
            return const SizedBox.shrink();
          }

          // 获取当前项
          final historyItem = controller.translationHistory[historyIndex];

          // 构建项目widget
          return _buildTranslationItemWidget(context, historyItem);
        },
      );
    });
  }

  Widget _buildTranslationItemWidget(
      BuildContext context, TranslationItem item) {
    return Container(
      margin: const EdgeInsets.only(bottom: 8),
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: item.isIntermediate
            ? Colors.grey.withOpacity(0.1) // 中间结果使用浅灰色底色
            : (item.sourceLanguageCode == controller.sourceLanguageCode.value
                ? Theme.of(context)
                    .colorScheme
                    .primary
                    .withOpacity(0.08) // 源语言匹配时使用主题色底色
                : Theme.of(context)
                    .colorScheme
                    .secondary
                    .withOpacity(0.08)), // 否则使用次要色底色
        borderRadius: BorderRadius.circular(12),
        border: Border.all(
          color: item.isIntermediate
              ? Colors.grey.withOpacity(0.2)
              : Colors.transparent,
          width: 1,
        ),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // 源文本和删除按钮行
          Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              // 源文本
              Expanded(
                child: Text(
                  item.sourceText,
                  style: TextStyle(
                    fontSize: 16,
                    color: Theme.of(context).textTheme.bodyLarge?.color,
                  ),
                ),
              ),
              // 删除按钮 - 只对完成态记录显示，与源文本平齐
              if (!item.isIntermediate)
                GestureDetector(
                  onTap: () => _showDeleteItemConfirmDialog(item),
                  child: Container(
                    padding: EdgeInsets.all(4.w),
                    child: Icon(
                      Icons.delete_outline,
                      size: 18.sp,
                      color: Colors.grey[500],
                    ),
                  ),
                ),
            ],
          ),
          if (item.translatedText.isNotEmpty) ...[
            const SizedBox(height: 8),
            // 翻译文本
            Text(
              item.translatedText,
              style: TextStyle(
                fontSize: 16,
                color: Theme.of(context).textTheme.bodyMedium?.color,
                fontWeight: FontWeight.w500,
              ),
            ),
          ],
          // 语言信息和时间戳
          const SizedBox(height: 4),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Expanded(
                child: Text(
                  '${item.sourceLanguageName.tr} → ${item.targetLanguageName.tr}',
                  style: TextStyle(
                    fontSize: 12,
                    color: Theme.of(context).textTheme.bodySmall?.color,
                  ),
                ),
              ),
              // 播放按钮
              if (!item.isIntermediate)
                GestureDetector(
                  onTap: () => controller.playTranslationItem(item),
                  child: Container(
                    padding: EdgeInsets.all(4.w),
                    child: Icon(
                      Icons.volume_up,
                      size: 20.sp,
                      color: Theme.of(context).colorScheme.primary,
                    ),
                  ),
                ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildControlBar(bool isDarkMode) {
    // 使用GlobalKey来获取控制栏的高度
    final controlBarKey = GlobalKey();

    // 在构建完成后获取控制栏的高度并设置到控制器中
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (controlBarKey.currentContext != null) {
        final RenderBox renderBox =
            controlBarKey.currentContext!.findRenderObject() as RenderBox;
        final height = renderBox.size.height;
        controller.setBottomBarHeight(height);
      }
    });

    return Container(
      key: controlBarKey,
      padding: EdgeInsets.symmetric(horizontal: 16.w, vertical: 16.h),
      decoration: BoxDecoration(
        color: isDarkMode ? AppColors.cardBackground : Colors.white,
        boxShadow: [
          BoxShadow(
            color: Colors.black.withAlpha(isDarkMode ? 30 : 13),
            blurRadius: 4,
            offset: const Offset(0, -2),
          ),
        ],
      ),
      child: Obx(() {
        return Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            // 原有的按钮区域
            if (controller.currentMode.value == 'faceToFace')
              Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  // 耳机图标按钮 (说话者1)-显示源语言
                  Obx(() => _buildHoldToTalkButton(
                        isDarkMode: isDarkMode,
                        speakerId: 1,
                        activeSpeaker: controller.activeSpeaker.value,
                        icon: Icons.mic_none,
                        label: controller.sourceLanguage.value
                            .split(' ')[0]
                            .tr, // 源语言名称
                      )),
                  SizedBox(width: 16.w),
                  // 手机图标按钮 (说话者2)-显示目标语言
                  Obx(() => _buildHoldToTalkButton(
                        isDarkMode: isDarkMode,
                        speakerId: 2,
                        activeSpeaker: controller.activeSpeaker.value,
                        icon: Icons.mic_none,
                        label: controller.targetLanguage.value
                            .split(' ')[0]
                            .tr, // 目标语言名称
                      )),
                ],
              )
            else
              Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  // 主要控制按钮 - 开始/暂停语音识别
                  Obx(() {
                    final isRecognizing = controller.isRecognizing.value;
                    return GestureDetector(
                      onTap: () {
                        if (isRecognizing) {
                          controller.stopAll();
                        } else {
                          // 弹出翻译模式选择器
                          TranslationModeSelector.show(isDarkMode);
                        }
                      },
                      child: Container(
                        width: 60.w,
                        height: 60.w,
                        decoration: BoxDecoration(
                          color: isRecognizing
                              ? (isDarkMode ? Colors.red[700] : Colors.red)
                              : (isDarkMode ? AppColors.primary : Colors.blue),
                          shape: BoxShape.circle,
                        ),
                        child: Icon(
                          isRecognizing ? Icons.pause : Icons.play_arrow,
                          color: Colors.white,
                          size: 30.sp,
                        ),
                      ),
                    );
                  }),
                ],
              ),

            // 添加间距
            //SizedBox(height: 16.h),

            // 语音识别结果显示框
            // Container(
            //   width: double.infinity,
            //   padding: EdgeInsets.all(12.w),
            //   decoration: BoxDecoration(
            //     color: isDarkMode ? Colors.grey[800] : Colors.grey[100],
            //     borderRadius: BorderRadius.circular(8.r),
            //     border: Border.all(
            //       color: isDarkMode ? Colors.grey[600]! : Colors.grey[300]!,
            //       width: 1,
            //     ),
            //   ),
            //   child: Obx(() {
            //     // 显示最新的语音识别结果
            //     final recognitionText = controller.latestRecognitionText.value;
            //     final detectedLanguage = controller.detectedLanguageCode1.value;

            //     return Column(
            //       crossAxisAlignment: CrossAxisAlignment.start,
            //       children: [
            //         // 标题
            //         Text(
            //           '麦头语音识别结果',
            //           style: TextStyle(
            //             fontSize: 12.sp,
            //             color: isDarkMode ? Colors.grey[400] : Colors.grey[600],
            //             fontWeight: FontWeight.w500,
            //           ),
            //         ),
            //         SizedBox(height: 4.h),
            //         // 识别文本 - 这里显示 finalResult1 的内容
            //         Text(
            //           recognitionText.isEmpty ? '等待语音输入...' : recognitionText,
            //           style: TextStyle(
            //             fontSize: 14.sp,
            //             color: isDarkMode ? Colors.white : Colors.black87,
            //             height: 1.3,
            //           ),
            //         ),
            //         // 检测到的语言（如果有）
            //         if (detectedLanguage.isNotEmpty) ...[
            //           SizedBox(height: 4.h),
            //           Text(
            //             '检测语言: $detectedLanguage',
            //             style: TextStyle(
            //               fontSize: 10.sp,
            //               color:
            //                   isDarkMode ? Colors.grey[500] : Colors.grey[500],
            //             ),
            //           ),
            //         ],
            //       ],
            //     );
            //   }),
            // ),
          ],
        );
      }),
    );
  }

// 按住说话按钮组件
  Widget _buildHoldToTalkButton({
    required bool isDarkMode,
    required int speakerId,
    required int activeSpeaker,
    required IconData icon,
    required String label,
  }) {
    bool isActive = activeSpeaker == speakerId;
    bool isDisabled = activeSpeaker != 0 && activeSpeaker != speakerId;

    return Listener(
      onPointerDown: (_) async {
        // 检查权限
        if (!controller.hasRecordPermission.value) {
          Get.snackbar('权限提示', '需要麦克风权限才能使用录音功能');
          return;
        }

        // 只有在没有其他按钮激活时才能激活当前按钮
        if (activeSpeaker == 0) {
          await controller.setActiveSpeaker(speakerId);
        }
      },
      onPointerUp: (_) async {
        // 松开按钮时，如果当前按钮是激活状态，则停止
        if (isActive) {
          await controller.setActiveSpeaker(0);
        }
      },
      child: AnimatedContainer(
        duration: const Duration(milliseconds: 200),
        width: 160.w, // 长条形宽度
        height: 54.h, // 长条形高度
        decoration: BoxDecoration(
          color: isActive
              ? (isDarkMode ? Colors.green[700] : Colors.green)
              : (isDisabled
                  ? (isDarkMode ? Colors.grey[800] : Colors.grey[300])
                  : (isDarkMode ? AppColors.primary : Colors.blue)),
          borderRadius: BorderRadius.circular(25.r), // 圆角长条形
          boxShadow: isActive
              ? [
                  BoxShadow(
                    color: Colors.green.withOpacity(0.5),
                    blurRadius: 10,
                    spreadRadius: 3,
                  )
                ]
              : [
                  BoxShadow(
                    color: (isDarkMode ? Colors.black : Colors.grey)
                        .withOpacity(0.2),
                    blurRadius: 8,
                    spreadRadius: 1,
                    offset: Offset(0, 2),
                  )
                ],
        ),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            // 左边图标
            Icon(
              icon,
              color: isActive
                  ? Colors.white
                  : Colors.white.withOpacity(isDisabled ? 0.3 : 0.9),
              size: 20.sp,
            ),
            SizedBox(width: 8.w), // 图标和文字间距
            // 右边语言名称
            Flexible(
              child: Text(
                label,
                style: TextStyle(
                  fontSize: 12.sp,
                  fontWeight: FontWeight.w500,
                  color: isActive
                      ? Colors.white
                      : Colors.white.withOpacity(isDisabled ? 0.3 : 0.9),
                ),
                textAlign: TextAlign.center,
                maxLines: 1,
                overflow: TextOverflow.ellipsis, // 防止文本溢出
              ),
            ),
          ],
        ),
      ),
    );
  }

  // 构建加载更多指示器
  Widget _buildLoadMoreIndicator() {
    return Obx(() {
      if (controller.isLoadingMore.value) {
        // 正在加载状态 - 增强视觉效果
        return Container(
          padding: const EdgeInsets.symmetric(vertical: 20),
          child: Center(
            child: Column(
              mainAxisSize: MainAxisSize.min,
              children: [
                SizedBox(
                  width: 24,
                  height: 24,
                  child: CircularProgressIndicator(
                    strokeWidth: 2.5,
                    valueColor: const AlwaysStoppedAnimation<Color>(
                      AppColors.primary,
                    ),
                  ),
                ),
                const SizedBox(height: 12),
                Text(
                  '正在加载历史记录...',
                  style: TextStyle(
                    fontSize: 14.sp,
                    color: Colors.grey[600],
                    fontWeight: FontWeight.w500,
                  ),
                ),
              ],
            ),
          ),
        );
      } else if (controller.isLoadingMoreError.value) {
        // 加载失败状态 - 增强视觉效果
        return Container(
          padding: const EdgeInsets.symmetric(vertical: 18),
          child: Center(
            child: GestureDetector(
              onTap: () => controller.loadMoreHistory(),
              child: Container(
                padding:
                    const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
                decoration: BoxDecoration(
                  color: Colors.red[50],
                  borderRadius: BorderRadius.circular(20),
                  border: Border.all(color: Colors.red[200]!, width: 1),
                ),
                child: Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Icon(
                      Icons.refresh,
                      size: 18.sp,
                      color: Colors.red[600],
                    ),
                    SizedBox(width: 8.w),
                    Text(
                      '加载失败，点击重试',
                      style: TextStyle(
                        fontSize: 14.sp,
                        color: Colors.red[600],
                        fontWeight: FontWeight.w500,
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),
        );
      } else {
        // 默认状态（有更多记录但未加载）- 增强视觉效果
        return Container(
          padding: const EdgeInsets.symmetric(vertical: 12),
          child: Center(
            child: Container(
              padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
              decoration: BoxDecoration(
                color: Colors.grey[100],
                borderRadius: BorderRadius.circular(16),
              ),
              child: Row(
                mainAxisSize: MainAxisSize.min,
                children: [
                  Icon(
                    Icons.keyboard_arrow_up,
                    size: 16.sp,
                    color: Colors.grey[500],
                  ),
                  SizedBox(width: 4.w),
                  Text(
                    '向上滑动查看更多历史',
                    style: TextStyle(
                      fontSize: 12.sp,
                      color: Colors.grey[600],
                    ),
                  ),
                ],
              ),
            ),
          ),
        );
      }
    });
  }

  // 显示删除单条记录确认对话框
  void _showDeleteItemConfirmDialog(TranslationItem item) {
    final isDarkMode = Theme.of(Get.context!).brightness == Brightness.dark;

    Get.dialog(
      AlertDialog(
        backgroundColor: isDarkMode ? AppColors.cardBackground : Colors.white,
        title: Text(
          'deleteTranslationRecord'.tr, // 删除翻译记录
          style: TextStyle(
            fontSize: 18.sp,
            fontWeight: FontWeight.bold,
            color: isDarkMode ? Colors.white : Colors.black,
          ),
        ),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(
              'deleteTranslationConfirm'.tr, // 确定要删除这条翻译记录吗？此操作无法撤销。
              style: TextStyle(
                fontSize: 16.sp,
                color: isDarkMode ? Colors.grey[300] : Colors.black87,
              ),
            ),
            SizedBox(height: 12.h),
            // 显示要删除的记录预览
            Container(
              padding: EdgeInsets.all(12.w),
              decoration: BoxDecoration(
                color: isDarkMode
                    ? Colors.grey[800]?.withOpacity(0.5)
                    : Colors.grey[100],
                borderRadius: BorderRadius.circular(8.r),
                border: Border.all(
                  color: isDarkMode ? Colors.grey[700]! : Colors.grey[300]!,
                  width: 1,
                ),
              ),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    item.sourceText,
                    style: TextStyle(
                      fontSize: 14.sp,
                      color: isDarkMode ? Colors.white : Colors.black,
                      fontWeight: FontWeight.w500,
                    ),
                    maxLines: 2,
                    overflow: TextOverflow.ellipsis,
                  ),
                  if (item.translatedText.isNotEmpty) ...[
                    SizedBox(height: 4.h),
                    Text(
                      item.translatedText,
                      style: TextStyle(
                        fontSize: 14.sp,
                        color: isDarkMode ? Colors.grey[300] : Colors.grey[700],
                      ),
                      maxLines: 2,
                      overflow: TextOverflow.ellipsis,
                    ),
                  ],
                ],
              ),
            ),
          ],
        ),
        actions: [
          TextButton(
            onPressed: () => Get.back(),
            child: Text(
              'cancel'.tr,
              style: TextStyle(
                fontSize: 16.sp,
                color: isDarkMode ? Colors.grey[400] : Colors.grey[700],
              ),
            ),
          ),
          TextButton(
            onPressed: () {
              Get.back();
              // 删除指定的翻译记录
              _deleteTranslationItem(item);
            },
            child: Text(
              'confirm'.tr,
              style: TextStyle(
                fontSize: 16.sp,
                color: Colors.red,
                fontWeight: FontWeight.bold,
              ),
            ),
          ),
        ],
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(12.r),
        ),
      ),
    );
  }

  // 删除翻译记录的具体实现
  void _deleteTranslationItem(TranslationItem item) {
    try {
      // 调用控制器的删除方法
      controller.deleteTranslationItem(item.sessionId, item.timestamp);

      // 显示删除成功提示
      // Get.snackbar(
      //   'success'.tr, // deleteSuccess
      //   '已删除该翻译记录', // deleteTranslationSuccess
      //   snackPosition: SnackPosition.BOTTOM,
      //   backgroundColor: Get.isDarkMode ? Colors.grey[800] : Colors.grey[200],
      //   colorText: Get.isDarkMode ? Colors.white : Colors.black,
      //   duration: const Duration(milliseconds: 800),
      // );
    } catch (e) {
      // 显示删除失败提示
      Get.snackbar(
        'error'.tr, // deleteFailed
        '删除翻译记录时发生错误: ${e.toString()}', // deleteTranslationError
        snackPosition: SnackPosition.BOTTOM,
        backgroundColor: Colors.red[400],
        colorText: Colors.white,
        duration: const Duration(milliseconds: 1500),
      );
    }
  }

  // 构建语言选择栏
  Widget _buildLanguageSelectionBar(bool isDarkMode) {
    return Container(
      height: 44.h,
      padding: EdgeInsets.symmetric(horizontal: 16.w, vertical: 6.h),
      decoration: BoxDecoration(
        color: isDarkMode ? AppColors.cardBackground : Colors.white,
        boxShadow: [
          BoxShadow(
            color: Colors.black.withOpacity(0.1),
            blurRadius: 4,
            offset: const Offset(0, 2),
          ),
          BoxShadow(
            color: Colors.black.withOpacity(0.1),
            blurRadius: 4,
            offset: const Offset(0, -2),
          ),
        ],
      ),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          // 源语言选择
          Expanded(
            child: GestureDetector(
              onTap: () => LanguageSelectionDialog.show(true, isDarkMode),
              child: Container(
                padding: EdgeInsets.symmetric(horizontal: 8.w, vertical: 4.h),
                decoration: BoxDecoration(
                  color: isDarkMode
                      ? Colors.white.withOpacity(0.1)
                      : Colors.grey[100],
                  borderRadius: BorderRadius.circular(16.r),
                ),
                child: Text(
                  '${controller.sourceLanguage.value.split(' ')[0]}'.tr,
                  style: TextStyle(
                    fontSize: 15.sp,
                    fontWeight: FontWeight.w600,
                    color: isDarkMode ? Colors.white : Colors.black,
                  ),
                  textAlign: TextAlign.center,
                  overflow: TextOverflow.ellipsis,
                ),
              ),
            ),
          ),

          // 语言互换按钮
          GestureDetector(
            onTap: controller.swapLanguages,
            child: Container(
              margin: EdgeInsets.symmetric(horizontal: 8.w),
              padding: EdgeInsets.all(4.r),
              decoration: BoxDecoration(
                color: isDarkMode
                    ? AppColors.primary.withOpacity(0.2)
                    : Colors.blue[50],
                shape: BoxShape.circle,
              ),
              child: Icon(
                Icons.swap_horiz,
                color: isDarkMode ? AppColors.primary : Colors.blue,
                size: 20.sp,
              ),
            ),
          ),

          // 目标语言选择
          Expanded(
            child: GestureDetector(
              onTap: () => LanguageSelectionDialog.show(false, isDarkMode),
              child: Container(
                padding: EdgeInsets.symmetric(horizontal: 8.w, vertical: 4.h),
                decoration: BoxDecoration(
                  color: isDarkMode
                      ? Colors.white.withOpacity(0.1)
                      : Colors.grey[100],
                  borderRadius: BorderRadius.circular(16.r),
                ),
                child: Transform.rotate(
                  angle: 3.14159, // 旋转180度
                  child: Text(
                    '${controller.targetLanguage.value.split(' ')[0]}'.tr,
                    style: TextStyle(
                      fontSize: 15.sp,
                      fontWeight: FontWeight.w600,
                      color: isDarkMode ? Colors.white : Colors.black,
                    ),
                    textAlign: TextAlign.center,
                    overflow: TextOverflow.ellipsis,
                  ),
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }
}