import 'dart:async';
import 'package:get/get.dart';
import '../../../data/services/azure_asr_service.dart';
import '../../../core/utils/logger.dart';

class AzureAsrTestController extends GetxController {
  final AzureAsrService _azureService = Get.find<AzureAsrService>();
  
  // 可观察状态
  final isListening = false.obs;
  final errorMessage = ''.obs;
  final isContinuous = true.obs;
  final recognitionResults = <String>[].obs;
  
  // 连续识别相关
  StreamSubscription? _recognitionSubscription;
  
  @override
  void onInit() {
    super.onInit();
    
    // 由于 AzureAsrService 没有公开的 isListening 属性，我们需要自己管理状态
  }
  
  /// 开始录音
  void startListening() async {
    try {
      errorMessage.value = '';
      
      if (isContinuous.value) {
        // 连续识别模式
        final success = await _azureService.startContinuousRecognition();
        if (!success) {
          errorMessage.value = '无法启动语音识别';
          return;
        }
        
        isListening.value = true;
        
        _recognitionSubscription = _azureService.recognitionStream?.listen(
          (event) {
            switch (event.type) {
              case RecognitionEventType.finalResult:
                if (event.text.isNotEmpty) {
                  recognitionResults.add(event.text);
                }
                break;
              case RecognitionEventType.error:
                errorMessage.value = event.error ?? '未知错误';
                isListening.value = false;
                break;
              case RecognitionEventType.canceled:
                errorMessage.value = '识别已取消: ${event.reason ?? "未知原因"}';
                isListening.value = false;
                break;
              case RecognitionEventType.sessionStopped:
                isListening.value = false;
                break;
              default:
                break;
            }
          },
          onError: (error) {
            errorMessage.value = error.toString();
            isListening.value = false;
          },
        );
      } else {
        // 一次性识别模式
        isListening.value = true;
        try {
          final result = await _azureService.recognizeOnce();
          if (result.isNotEmpty) {
            recognitionResults.add(result);
          }
        } catch (e) {
          errorMessage.value = '识别失败: $e';
        } finally {
          isListening.value = false;
        }
      }
    } catch (e) {
      Logger.error('启动语音识别失败', e);
      errorMessage.value = e.toString();
      isListening.value = false;
    }
  }
  
  /// 停止录音
  void stopListening() async {
    try {
      if (isContinuous.value) {
        final success = await _azureService.stopContinuousRecognition();
        if (!success) {
          errorMessage.value = '停止识别失败';
        }
        await _recognitionSubscription?.cancel();
        _recognitionSubscription = null;
        isListening.value = false;
      }
    } catch (e) {
      Logger.error('停止语音识别失败', e);
      errorMessage.value = e.toString();
      isListening.value = false;
    }
  }
  
  /// 清空结果
  void clearResults() {
    recognitionResults.clear();
  }
  
  @override
  void onClose() {
    _recognitionSubscription?.cancel();
    super.onClose();
  }
}