import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import '../controllers/translation_controller.dart';
import '../controllers/translation_history_controller.dart';
import '../controllers/translation_detail_controller.dart';
import 'package:intl/intl.dart';
import 'package:flutter/services.dart';
import 'package:share_plus/share_plus.dart';
import '../../../core/theme/app_colors.dart';

class TranslationDetailView extends GetView<TranslationDetailController> {
  TranslationDetailView({Key? key}) : super(key: key);

  // 缓存文本，避免重复计算
  final _sourceTextCache = Rx<String?>(null);
  final _translatedTextCache = Rx<String?>(null);

  // 获取源文本（带缓存）
  String _getCombinedSourceText() {
    if (_sourceTextCache.value == null) {
      _sourceTextCache.value = controller.getCombinedSourceText();
    }
    return _sourceTextCache.value!;
  }

  // 获取翻译文本（带缓存）
  String _getCombinedTranslatedText() {
    if (_translatedTextCache.value == null) {
      _translatedTextCache.value = controller.getCombinedTranslatedText();
    }
    return _translatedTextCache.value!;
  }

  @override
  Widget build(BuildContext context) {
    final isDarkMode = Theme.of(context).brightness == Brightness.dark;
    
    return Scaffold(
      backgroundColor: isDarkMode ? AppColors.darkBackground : Color(0xFFF5F5F8),
      appBar: _buildAppBar(isDarkMode),
      body: Obx(() {
        // 显示加载状态
        if (controller.isLoading.value) {
          return Center(
            child: CircularProgressIndicator(
              color: isDarkMode ? AppColors.primary : Colors.blue,
            ),
          );
        }
        
        return Column(
          children: [
            _buildTabButtons(isDarkMode),
            _buildContentArea(isDarkMode),
          ],
        );
      }),
    );
  }
  
  // 构建应用栏
  PreferredSizeWidget _buildAppBar(bool isDarkMode) {
    return AppBar(
      backgroundColor: isDarkMode ? AppColors.cardBackground : Color(0xFFF5F5F8),
      elevation: 0,
      leading: IconButton(
        icon: Icon(
          Icons.arrow_back_ios,
          color: isDarkMode ? Colors.white : Colors.black,
          size: 20.sp,
        ),
        onPressed: () => Get.back(),
      ),
      title: Text(
        'Detail',
        style: TextStyle(
          color: isDarkMode ? Colors.white : Colors.black,
          fontSize: 24.sp,
          fontWeight: FontWeight.bold,
        ),
      ),
      centerTitle: true,
      actions: [
        IconButton(
          icon: Icon(
            Icons.share,
            color: isDarkMode ? Colors.white : Colors.black,
            size: 22.sp,
          ),
          onPressed: _shareContent,
        ),
      ],
    );
  }
  
  // 构建选项卡按钮
  Widget _buildTabButtons(bool isDarkMode) {
    return Padding(
      padding: EdgeInsets.symmetric(horizontal: 16.w, vertical: 12.h),
      child: Row(
        children: [
          Expanded(
            child: Obx(() => _buildTabButton(
              title: '原始记录',
              isSelected: controller.selectedTabIndex.value == 0,
              onTap: () => controller.switchTab(0),
              isDarkMode: isDarkMode,
            )),
          ),
          SizedBox(width: 12.w),
          Expanded(
            child: Obx(() => _buildTabButton(
              title: '记录摘要',
              isSelected: controller.selectedTabIndex.value == 1,
              onTap: () => controller.switchTab(1),
              isDarkMode: isDarkMode,
            )),
          ),
        ],
      ),
    );
  }
  
  // 构建内容区域
  Widget _buildContentArea(bool isDarkMode) {
    return Expanded(
      child: SingleChildScrollView(
        padding: EdgeInsets.symmetric(horizontal: 16.w),
        child: Obx(() {
          return Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              _buildTimestamp(isDarkMode),
              SizedBox(height: 8.h),
              
              // 根据选中的选项卡显示不同内容
              if (controller.selectedTabIndex.value == 0)
                ..._buildOriginalRecords(isDarkMode)
              else
                _buildSummaryWidget(isDarkMode),
                
              SizedBox(height: 24.h),
            ],
          );
        }),
      ),
    );
  }
  
  // 构建时间戳
  Widget _buildTimestamp(bool isDarkMode) {
    return Padding(
      padding: EdgeInsets.symmetric(horizontal: 8.w, vertical: 8.h),
      child: Text(
        DateFormat('yyyy-MM-dd HH:mm').format(controller.currentItem.timestamp),
        style: TextStyle(
          fontSize: 14.sp,
          fontWeight: FontWeight.w600,
          color: isDarkMode ? Colors.grey[400] : Colors.grey[600],
          letterSpacing: 1.0,
        ),
      ),
    );
  }
  
  // 构建原始记录列表
  List<Widget> _buildOriginalRecords(bool isDarkMode) {
    return controller.sessionItems.map((sessionItem) => _buildSessionItemWidget(sessionItem, isDarkMode)).toList();
  }
  
  // 构建选项卡按钮
  Widget _buildTabButton({
    required String title,
    required bool isSelected,
    required VoidCallback onTap,
    required bool isDarkMode,
  }) {
    return GestureDetector(
      onTap: onTap,
      child: Container(
        height: 40.h,
        decoration: BoxDecoration(
          color: isSelected 
              ? (isDarkMode ? AppColors.primary : Colors.blue) 
              : (isDarkMode ? AppColors.cardBackground : Colors.white),
          borderRadius: BorderRadius.circular(20.r),
          boxShadow: [
            BoxShadow(
              color: Colors.black.withAlpha(isDarkMode ? 30 : 8),
              blurRadius: 4,
              offset: Offset(0, 1),
            ),
          ],
        ),
        alignment: Alignment.center,
        child: Text(
          title,
          style: TextStyle(
            fontSize: 15.sp,
            fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
            color: isSelected 
                ? Colors.white 
                : (isDarkMode ? Colors.white : Colors.black87),
          ),
        ),
      ),
    );
  }
  
  // 构建会话详情中的翻译项
  Widget _buildSessionItemWidget(TranslationItem item, bool isDarkMode) {
    return Container(
      width: double.infinity,
      margin: EdgeInsets.only(bottom: 16.h),
      decoration: BoxDecoration(
        color: isDarkMode ? AppColors.cardBackground : Colors.white,
        borderRadius: BorderRadius.circular(16.r),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withAlpha(isDarkMode ? 30 : 8),
            blurRadius: 8,
            offset: Offset(0, 2),
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // 源文本部分
          Padding(
            padding: EdgeInsets.fromLTRB(20.r, 20.r, 20.r, 10.r),
            child: Text(
              item.sourceText,
              style: TextStyle(
                fontSize: 15.sp,
                color: isDarkMode ? Colors.white : Colors.black,
                fontWeight: FontWeight.w500,
              ),
            ),
          ),
          // 翻译文本部分
          Padding(
            padding: EdgeInsets.fromLTRB(20.r, 10.r, 20.r, 16.r),
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.end,
              children: [
                Expanded(
                  child: Text(
                    item.translatedText,
                    style: TextStyle(
                      fontSize: 14.sp,
                      color: isDarkMode ? Colors.grey[400] : Colors.grey[700],
                      fontWeight: FontWeight.normal,
                    ),
                  ),
                ),
                SizedBox(width: 12.w),
                _buildPlayButton(() => controller.playTranslationItem(item), isDarkMode),
              ],
            ),
          ),
        ],
      ),
    );
  }
  
  // 构建播放按钮
  Widget _buildPlayButton(VoidCallback onTap, bool isDarkMode) {
    return Material(
      color: Colors.transparent,
      child: InkWell(
        onTap: onTap,
        borderRadius: BorderRadius.circular(20.r),
        splashColor: isDarkMode ? AppColors.primary.withOpacity(0.2) : Colors.blue.withOpacity(0.2),
        child: Container(
          width: 28.w,
          height: 28.h,
          decoration: BoxDecoration(
            color: isDarkMode ? AppColors.primary.withAlpha(10) : Colors.blue.withAlpha(10),
            shape: BoxShape.circle,
          ),
          child: Icon(
            Icons.volume_up,
            color: Colors.white,
            size: 16.sp,
          ),
        ),
      ),
    );
  }
  
  // 构建总结视图
  Widget _buildSummaryWidget(bool isDarkMode) {
    final String combinedSourceText = _getCombinedSourceText();
    
    return Column(
      children: [
        // 摘要内容容器
        _buildSummaryContainer(isDarkMode),
        
        // 提取摘要按钮
        Obx(() => _buildExtractSummaryButton(combinedSourceText, isDarkMode)),
        
        // 重新生成按钮
        Obx(() => _buildRegenerateSummaryButton(combinedSourceText, isDarkMode)),
      ],
    );
  }
  
  // 构建摘要容器
  Widget _buildSummaryContainer(bool isDarkMode) {
    return Container(
      width: double.infinity,
      margin: EdgeInsets.only(bottom: 16.h),
      decoration: BoxDecoration(
        color: isDarkMode ? AppColors.cardBackground : Colors.white,
        borderRadius: BorderRadius.circular(16.r),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withAlpha(isDarkMode ? 30 : 8),
            blurRadius: 8,
            offset: Offset(0, 2),
          ),
        ],
      ),
      child: Obx(() {
        if (controller.summaryResult.value.isEmpty) {
          return _buildEmptySummaryPrompt(isDarkMode);
        } else {
          return _buildSummaryContent(isDarkMode);
        }
      }),
    );
  }
  
  // 构建空摘要提示
  Widget _buildEmptySummaryPrompt(bool isDarkMode) {
    return Padding(
      padding: EdgeInsets.all(24.r),
      child: Center(
        child: Text(
          '点击下方按钮生成会话摘要',
          style: TextStyle(
            fontSize: 15.sp,
            color: isDarkMode ? Colors.grey[400] : Colors.grey[600],
            fontStyle: FontStyle.italic,
          ),
          textAlign: TextAlign.center,
        ),
      ),
    );
  }
  
  // 构建摘要内容
  Widget _buildSummaryContent(bool isDarkMode) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Padding(
          padding: EdgeInsets.all(20.r),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text(
                '摘要内容',
                style: TextStyle(
                  fontSize: 16.sp,
                  fontWeight: FontWeight.bold,
                  color: isDarkMode ? Colors.white : Colors.black,
                ),
              ),
              SizedBox(height: 12.h),
              Text(
                controller.summaryResult.value,
                style: TextStyle(
                  fontSize: 15.sp,
                  color: isDarkMode ? Colors.grey[400] : Colors.grey[800],
                  height: 1.5,
                ),
              ),
            ],
          ),
        ),
        Divider(
          height: 1,
          thickness: 0.5,
          color: isDarkMode ? Colors.grey[700] : Colors.grey[200],
        ),
        Padding(
          padding: EdgeInsets.symmetric(horizontal: 12.r, vertical: 8.r),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.end,
            children: [
              // 播放按钮
              Material(
                color: Colors.transparent,
                child: InkWell(
                  onTap: () => controller.playText(controller.summaryResult.value),
                  borderRadius: BorderRadius.circular(20.r),
                  splashColor: isDarkMode ? AppColors.primary.withOpacity(0.2) : Colors.blue.withOpacity(0.2),
                  child: Padding(
                    padding: EdgeInsets.all(8.r),
                    child: Icon(
                      Icons.volume_up,
                      color: isDarkMode ? Colors.white : Colors.blue,
                      size: 18.sp,
                    ),
                  ),
                ),
              ),
              SizedBox(width: 12.w),
              // 复制按钮
              Material(
                color: Colors.transparent,
                child: InkWell(
                  onTap: _copySummaryToClipboard,
                  borderRadius: BorderRadius.circular(20.r),
                  splashColor: isDarkMode ? AppColors.primary.withOpacity(0.2) : Colors.blue.withOpacity(0.2),
                  child: Padding(
                    padding: EdgeInsets.all(8.r),
                    child: Icon(
                      Icons.copy,
                      color: isDarkMode ? Colors.white : Colors.blue,
                      size: 18.sp,
                    ),
                  ),
                ),
              ),
            ],
          ),
        ),
      ],
    );
  }
  
  // 复制摘要到剪贴板
  void _copySummaryToClipboard() {
    Clipboard.setData(ClipboardData(text: controller.summaryResult.value));
    Get.snackbar(
      '已复制',
      '摘要已复制到剪贴板',
      snackPosition: SnackPosition.BOTTOM,
      duration: Duration(seconds: 2),
    );
  }
  
  // 构建提取摘要按钮
  Widget _buildExtractSummaryButton(String combinedSourceText, bool isDarkMode) {
    final bool isDisabled = controller.isGeneratingSummary.value || controller.summaryResult.value.isNotEmpty;
    
    return Container(
      width: double.infinity,
      margin: EdgeInsets.only(bottom: 16.h),
      child: ElevatedButton(
        onPressed: isDisabled ? null : () => _extractSummary(combinedSourceText),
        style: ElevatedButton.styleFrom(
          backgroundColor: isDarkMode ? AppColors.primary : Colors.blue,
          foregroundColor: Colors.white,
          padding: EdgeInsets.symmetric(vertical: 12.h),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(16.r),
          ),
          elevation: 0,
          disabledBackgroundColor: controller.isGeneratingSummary.value 
              ? isDarkMode ? AppColors.primary.withAlpha(128) : Colors.blue.withAlpha(128)
              : Colors.grey.withAlpha(128),
        ),
        child: controller.isGeneratingSummary.value
            ? _buildGeneratingIndicator(isDarkMode)
            : Text(
                controller.summaryResult.value.isEmpty ? '提取摘要' : '已生成摘要',
                style: TextStyle(
                  fontSize: 16.sp,
                  fontWeight: FontWeight.w600,
                ),
              ),
      ),
    );
  }
  
  // 构建生成中指示器
  Widget _buildGeneratingIndicator(bool isDarkMode) {
    return Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        SizedBox(
          width: 20.w,
          height: 20.h,
          child: CircularProgressIndicator(
            color: Colors.white,
            strokeWidth: 2.0,
          ),
        ),
        SizedBox(width: 12.w),
        Text(
          '生成中...',
          style: TextStyle(
            fontSize: 16.sp,
            fontWeight: FontWeight.w600,
          ),
        ),
      ],
    );
  }
  
  // 构建重新生成按钮
  Widget _buildRegenerateSummaryButton(String combinedSourceText, bool isDarkMode) {
    if (controller.summaryResult.value.isEmpty || controller.isGeneratingSummary.value) {
      return SizedBox.shrink();
    }
    
    return Container(
      width: double.infinity,
      margin: EdgeInsets.only(bottom: 16.h),
      child: OutlinedButton(
        onPressed: () => _extractSummary(combinedSourceText),
        style: OutlinedButton.styleFrom(
          foregroundColor: isDarkMode ? AppColors.primary : Colors.blue,
          side: BorderSide(color: isDarkMode ? AppColors.primary : Colors.blue),
          padding: EdgeInsets.symmetric(vertical: 12.h),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(16.r),
          ),
        ),
        child: Text(
          '重新生成',
          style: TextStyle(
            fontSize: 16.sp,
            fontWeight: FontWeight.w600,
          ),
        ),
      ),
    );
  }
  
  // 提取摘要方法
  void _extractSummary(String text) async {
    final result = await controller.extractSummary(text);
    
    // 检查是否超时，如果超时则显示重试选项
    if (result.contains('超时')) {
      _showTimeoutDialog(text);
    }
  }
  
  // 显示超时对话框
  void _showTimeoutDialog(String text) {
    Get.dialog(
      AlertDialog(
        title: Text(
          '请求超时',
          style: TextStyle(
            fontSize: 18.sp,
            fontWeight: FontWeight.bold,
          ),
        ),
        content: Text(
          '生成摘要请求超时，可能是网络问题或服务器繁忙。',
          style: TextStyle(
            fontSize: 16.sp,
          ),
        ),
        actions: [
          TextButton(
            onPressed: () => Get.back(),
            child: Text(
              '取消',
              style: TextStyle(
                fontSize: 16.sp,
                color: Colors.grey[700],
              ),
            ),
          ),
          TextButton(
            onPressed: () {
              Get.back();
              // 使用延长的超时时间重试
              controller.retryExtractSummaryWithExtendedTimeout(text);
            },
            child: Text(
              '重试',
              style: TextStyle(
                fontSize: 16.sp,
                color: Colors.blue,
                fontWeight: FontWeight.bold,
              ),
            ),
          ),
        ],
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(12.r),
        ),
      ),
    );
  }

  // 分享内容方法
  void _shareContent() {
    String shareText = '';
    
    if (controller.selectedTabIndex.value == 0) {
      // 分享原始记录
      final String sourceText = _getCombinedSourceText();
      final String translatedText = _getCombinedTranslatedText();
      shareText = '原文：\n$sourceText\n\n译文：\n$translatedText';
    } else {
      // 分享摘要
      if (controller.summaryResult.value.isNotEmpty) {
        shareText = '会话摘要：\n${controller.summaryResult.value}';
      } else {
        Get.snackbar(
          '无法分享',
          '请先生成摘要',
          snackPosition: SnackPosition.BOTTOM,
          duration: Duration(seconds: 2),
        );
        return;
      }
    }
    
    // 调用系统分享
    Share.share(
      shareText,
      subject: '翻译会话记录 - ${DateFormat('yyyy-MM-dd HH:mm').format(controller.currentItem.timestamp)}',
    );
  }
}