import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import '../../controllers/translation_controller.dart';

/// 语言选择对话框
class LanguageSelectionDialog {
  /// 显示语言选择对话框（通用，支持文本/图片/语音翻译）
  /// [isSource] 是否为源语言选择
  /// [isDarkMode] 深色模式标记
  /// [languages] 可选，自定义语言列表（中文名称列表）；若为空则使用语音翻译模块的列表
  /// [currentLanguage] 当前选中的语言中文名称
  /// [includeAutoDetect] 是否在源语言首项加入“自动检测”选项（仅文本翻译需要）
  /// [translateLanguageNames] 是否将语言名称作为翻译键进行翻译（语音翻译保持原逻辑）
  /// [excludeLanguage] 需排除的语言中文名称（防止原语言与目标语言相同）
  /// [onSelected] 选中项回调，参数为中文名称
  static void show(
    bool isSource,
    bool isDarkMode, {
    List<String>? languages,
    String? currentLanguage,
    String? excludeLanguage,
    bool includeAutoDetect = false,
    bool translateLanguageNames = true,
    ValueChanged<String>? onSelected,
  }) {
    // 若未提供自定义列表，则在已注册时回退到语音翻译控制器的列表
    final hasTranslationController = Get.isRegistered<TranslationController>();
    final TranslationController? controller =
        hasTranslationController ? Get.find<TranslationController>() : null;
    final fallbackLanguages =
        controller?.supportedLanguages.keys.toList() ?? <String>[]; // 中文名称列表

    final displayLanguages = List<String>.from(languages ?? fallbackLanguages);

    // 过滤掉对侧已选语言，防止原语言与目标语言相同
    if (excludeLanguage != null && excludeLanguage.isNotEmpty) {
      displayLanguages.remove(excludeLanguage);
    }

    // 源语言是否展示“自动检测”选项（仅列表显示，值为中文“自动检测”）
    final hasAutoDetect = includeAutoDetect && isSource;

    // 计算当前选中项（优先传入值，其次回退到语音翻译控制器，最后列表首项或自动检测）
    final selectedLanguage = currentLanguage ??
        (controller != null
            ? (isSource
                ? controller.sourceLanguage.value
                : controller.targetLanguage.value)
            : (hasAutoDetect
                ? 'autoDetect'
                : (displayLanguages.isNotEmpty ? displayLanguages.first : '')));

    Get.dialog(Dialog(
      backgroundColor: isDarkMode ? Colors.grey[900] : Colors.white,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(16.r), // 统一圆角尺寸为16
      ),
      alignment: isSource ? Alignment.centerLeft : Alignment.centerRight,
      insetPadding: EdgeInsets.symmetric(horizontal: 10.w),
      child: SizedBox(
        width: 0.4.sw,
        child: Padding(
          // 使用Padding替代Container的padding
          padding: EdgeInsets.all(12.w), // 统一内边距
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              // 标题区域
              Padding(
                padding: EdgeInsets.symmetric(horizontal: 8.w),
                child: Text(
                  isSource
                      ? 'selectSourceLanguage'.tr // 选择源语言
                      : 'selectTargetLanguage'.tr, // 选择目标语言
                  style: TextStyle(
                    fontSize: 18.sp, // 调整字号
                    fontWeight: FontWeight.w600, // 使用数字字重
                    color: isDarkMode ? Colors.white : Colors.black87, // 优化文本颜色
                  ),
                ),
              ),
              SizedBox(height: 16.h),

              // 语言列表区域
              Container(
                constraints: BoxConstraints(maxHeight: 0.5.sh),
                child: SingleChildScrollView(
                  child: Column(
                    mainAxisSize: MainAxisSize.min,
                    children: List.generate(
                      hasAutoDetect
                          ? (displayLanguages.length + 1)
                          : displayLanguages.length,
                      (index) {
                        // 构造展示与实际值
                        final isAutoDetectItem = hasAutoDetect && index == 0;
                        final valueText = isAutoDetectItem
                            ? 'autoDetect'.tr
                            : displayLanguages[
                                hasAutoDetect ? index - 1 : index];
                        final displayText = isAutoDetectItem
                            ? 'autoDetect'.tr // 自动检测
                            : (translateLanguageNames
                                ? valueText.tr
                                : valueText);

                        final isSelected = selectedLanguage == valueText;

                        return GestureDetector(
                          // 改用手势检测器实现点击
                          onTap: () {
                            if (onSelected != null) {
                              onSelected(valueText);
                            } else {
                              // 默认行为：语音翻译控制器设置语言
                              if (isSource) {
                                controller?.setSourceLanguage(valueText);
                              } else {
                                controller?.setTargetLanguage(valueText);
                              }
                            }
                            Get.back();
                          },
                          child: Container(
                            margin: EdgeInsets.only(bottom: 10.h), // 添加项间距
                            padding: EdgeInsets.all(10.w), // 统一内边距
                            decoration: BoxDecoration(
                              color: isSelected // 选中状态背景色
                                  ? (isDarkMode
                                      ? const Color(0xFF6200EE).withOpacity(0.2)
                                      : Colors.blue.withOpacity(0.1))
                                  : (isDarkMode // 未选中状态背景色
                                      ? Colors.white.withOpacity(0.05)
                                      : Colors.grey[200]!),
                              borderRadius: BorderRadius.circular(12.r), // 项圆角
                              border: Border.all(
                                // 选中状态边框
                                color: isSelected
                                    ? (isDarkMode
                                        ? const Color(0xFF6200EE)
                                        : Colors.blue)
                                    : (isDarkMode // 未选中状态背景色
                                        ? Colors.white.withOpacity(0.05)
                                        : Colors.grey[200]!),
                                width: 1,
                              ),
                            ),
                            child: Row(
                              children: [
                                // 语言名称
                                Expanded(
                                  child: Text(
                                    displayText,
                                    style: TextStyle(
                                      fontSize: 16.sp,
                                      fontWeight: FontWeight.w500,
                                      color: isDarkMode
                                          ? Colors.white
                                          : Colors.black87,
                                      overflow: TextOverflow.ellipsis,
                                    ),
                                  ),
                                ),
                                // 选中指示器
                                Container(
                                  width: 24.w,
                                  height: 24.w,
                                  decoration: BoxDecoration(
                                    color: isSelected // 动态颜色
                                        ? (isDarkMode
                                            ? const Color(0xFF6200EE)
                                            : Colors.blue)
                                        : (isDarkMode
                                            ? Colors.white.withOpacity(0.1)
                                            : Colors.grey[300]),
                                    shape: BoxShape.circle, // 圆形样式
                                  ),
                                  child: isSelected
                                      ? Icon(
                                          // 选中时显示对勾
                                          Icons.check,
                                          size: 16.w,
                                          color: Colors.white,
                                        )
                                      : null,
                                ),
                              ],
                            ),
                          ),
                        );
                      },
                    ),
                  ),
                ),
              ),
              SizedBox(height: 16.h),

              // 取消按钮
              Align(
                alignment: Alignment.centerRight,
                child: TextButton(
                  onPressed: () => Get.back(),
                  child: Text(
                    'cancel'.tr, // 取消
                    style: TextStyle(
                      color: isDarkMode ? const Color(0xFF6200EE) : Colors.blue,
                    ),
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    ));
  }
}