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

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 Scaffold(
      backgroundColor: isDarkMode ? AppColors.darkBackground : Colors.grey[50],
      appBar: _buildAppBar(isDarkMode),
      body: _buildBody(isDarkMode),
    );
  }

  PreferredSizeWidget _buildAppBar(bool isDarkMode) {
    return AppBar(
      backgroundColor: isDarkMode ? AppColors.cardBackground : Colors.white,
      elevation: 0,
      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: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          // 源语言选择
          Flexible(
            child: GestureDetector(
              onTap: () => _showLanguageSelectionDialog(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], // Just show the Chinese part
                      style: TextStyle(
                        fontSize: 16.sp,
                        fontWeight: FontWeight.w600,
                        color: isDarkMode ? Colors.white : Colors.black,
                      ),
                      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
          Flexible(
            child: GestureDetector(
              onTap: () => _showLanguageSelectionDialog(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(() => Text(
                      controller.targetLanguage.value
                          .split(' ')[0], // Just show the English part
                      style: TextStyle(
                        fontSize: 16.sp,
                        fontWeight: FontWeight.w600,
                        color: isDarkMode ? Colors.white : Colors.black,
                      ),
                      overflow: TextOverflow.ellipsis,
                    )),
              ),
            ),
          ),
        ],
      ),
      centerTitle: true,
      actions: [
        // TTS toggle button
        Obx(() => IconButton(
              icon: Icon(
                controller.isTtsEnabled.value
                    ? Icons.volume_up
                    : Icons.volume_off,
                color: isDarkMode ? Colors.white : Colors.black,
                size: 24.sp,
              ),
              onPressed: controller.toggleTts,
              tooltip: '自动播放翻译结果',
            )),

        // 历史记录按钮
        IconButton(
          icon: Icon(
            Icons.history,
            color: isDarkMode ? Colors.white : Colors.black,
            size: 24.sp,
          ),
          onPressed: () async {
            // 停止语音识别和TTS，释放资源
            await controller.stopAll();
            await Get.to(
              () => const TranslationHistoryView(),
              binding: TranslationHistoryBinding(),
            );

            // 返回时不自动开始翻译，只需重新设置滚动监听器
            controller.setupScrollListener();
          },
          tooltip: '查看历史记录',
        ),
      ],
    );
  }

  Widget _buildBody(bool isDarkMode) {
    return Column(
      children: [
        Expanded(
          child: _buildTranslationContent(isDarkMode),
        ),
        _buildControlBar(isDarkMode),
      ],
    );
  }

  Widget _buildTranslationContent(bool isDarkMode) {
    return Obx(() {
      final itemCount = controller.translationHistory.length;

      // 使用 currentItem 来判断是否显示当前项
      final hasCurrentItem = controller.currentItem.value != null &&
          controller
              .currentItem.value!.sourceText.isNotEmpty; // 只有当有实际内容时才显示当前项

      // 计算底部内边距，确保内容不会被底部框遮住
      final bottomPadding = controller.bottomBarHeight + 20.h; // 使用控制栏高度加上额外间距

      return ListView.builder(
        controller: controller.scrollController,
        padding: EdgeInsets.only(
            left: 16.w, right: 16.w, top: 16.h, bottom: bottomPadding),
        itemCount: itemCount + (hasCurrentItem ? 1 : 0),
        itemBuilder: (context, index) {
          // Current item (being translated)
          if (hasCurrentItem && index == itemCount) {
            return _buildTranslationItemWidget(
              controller.currentItem.value!.sourceText,
              controller.currentItem.value!.translatedText,
              true,
              isIntermediate: controller.currentItem.value!.isIntermediate,
              isDarkMode: isDarkMode,
            );
          }

          // History items
          final historyItem = controller.translationHistory[index];
          return _buildTranslationItemWidget(
            historyItem.sourceText,
            historyItem.translatedText,
            false,
            item: historyItem,
            isIntermediate: false, // 历史项总是显示为最终结果
            isDarkMode: isDarkMode,
          );
        },
      );
    });
  }

  Widget _buildTranslationItemWidget(
    String sourceText,
    String translatedText,
    bool isCurrent, {
    TranslationItem? item,
    bool isIntermediate = false,
    required bool isDarkMode,
  }) {
    // 使用AnimatedContainer实现平滑过渡，但恢复原来的视觉样式
    return AnimatedContainer(
      duration: const Duration(milliseconds: 300),
      curve: Curves.easeInOut,
      margin: EdgeInsets.only(bottom: 24.h),
      decoration: BoxDecoration(
        color: isDarkMode ? AppColors.cardBackground : Colors.grey[100],
        borderRadius: BorderRadius.circular(12.r),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // Source text
          AnimatedContainer(
            duration: const Duration(milliseconds: 300),
            width: double.infinity,
            padding: EdgeInsets.all(16.r),
            child: Text(
              sourceText.isEmpty && isCurrent ? '等待语音输入...' : sourceText,
              style: TextStyle(
                fontSize: 16.sp,
                color: sourceText.isEmpty && isCurrent
                    ? (isDarkMode ? Colors.grey[400] : Colors.grey)
                    : (isDarkMode ? Colors.white : Colors.black),
                fontWeight: FontWeight.normal,
              ),
            ),
          ),

          // Divider
          Divider(
              height: 1,
              thickness: 1,
              color: isDarkMode ? Colors.grey[800] : Colors.grey[200]),

          // Translated text
          AnimatedContainer(
            duration: const Duration(milliseconds: 300),
            width: double.infinity,
            padding: EdgeInsets.all(16.r),
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Expanded(
                  child: Text(
                    translatedText.isEmpty && isCurrent
                        ? '翻译结果将显示在这里...'
                        : translatedText,
                    style: TextStyle(
                      fontSize: 16.sp,
                      color: translatedText.isEmpty && isCurrent
                          ? (isDarkMode ? Colors.grey[400] : Colors.grey)
                          : (isDarkMode ? Colors.white : Colors.black),
                      fontStyle: FontStyle.normal,
                    ),
                  ),
                ),
                if (translatedText.isNotEmpty)
                  IconButton(
                    icon: Icon(
                      Icons.volume_up,
                      color: isDarkMode ? AppColors.primary : Colors.blue,
                      size: 20.sp,
                    ),
                    onPressed: () {
                      if (isCurrent) {
                        controller.playTranslatedText(translatedText);
                      } else if (item != null) {
                        controller.playTranslationItem(item);
                      }
                    },
                  ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  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: 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 {
                  controller.startRecognition();
                }
              },
              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,
                ),
              ),
            );
          }),
        ],
      ),
    );
  }

  // 显示语言选择对话框
  void _showLanguageSelectionDialog(bool isSource, bool isDarkMode) {
    Get.dialog(
      Dialog(
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(24.r),
        ),
        insetPadding: EdgeInsets.symmetric(horizontal: 20.w),
        backgroundColor: isDarkMode ? AppColors.cardBackground : Colors.white,
        child: Container(
          width: 0.9.sw,
          padding: EdgeInsets.only(top: 32.h, bottom: 16.h),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Padding(
                padding: EdgeInsets.symmetric(horizontal: 24.w),
                child: Text(
                  isSource
                      ? 'selectSourceLanguage'.tr // 选择源语言
                      : 'selectTargetLanguage'.tr, // 选择目标语言
                  style: TextStyle(
                    fontSize: 20.sp,
                    fontWeight: FontWeight.bold,
                    color: isDarkMode ? Colors.white : Colors.black,
                  ),
                ),
              ),
              SizedBox(height: 16.h),
              Container(
                constraints: BoxConstraints(maxHeight: 0.5.sh),
                child: SingleChildScrollView(
                  child: Column(
                    mainAxisSize: MainAxisSize.min,
                    children:
                        controller.supportedLanguages.keys.map((language) {
                      return ListTile(
                        title: Text(
                          language,
                          style: TextStyle(
                            color: isDarkMode ? Colors.white : Colors.black,
                          ),
                        ),
                        trailing: Obx(() {
                          final currentLanguage = isSource
                              ? controller.sourceLanguage.value
                              : controller.targetLanguage.value;
                          return currentLanguage == language
                              ? Icon(
                                  Icons.check_circle,
                                  color: isDarkMode
                                      ? AppColors.primary
                                      : Colors.blue,
                                )
                              : const SizedBox.shrink();
                        }),
                        onTap: () {
                          if (isSource) {
                            controller.setSourceLanguage(language);
                          } else {
                            controller.setTargetLanguage(language);
                          }
                          Get.back();
                        },
                      );
                    }).toList(),
                  ),
                ),
              ),
              SizedBox(height: 16.h),
              Align(
                alignment: Alignment.centerRight,
                child: Padding(
                  padding: EdgeInsets.only(right: 24.w),
                  child: TextButton(
                    onPressed: () => Get.back(),
                    child: Text(
                      'cancel'.tr, // 取消
                      style: TextStyle(
                        color: isDarkMode ? AppColors.primary : Colors.blue,
                        fontSize: 16.sp,
                      ),
                    ),
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}