import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'dart:async';
import 'package:flutter/foundation.dart';
import '../../../data/services/volcano_tts_service.dart';
import '../../../core/utils/logger.dart';

class VolcanoTtsTestController extends GetxController {
  // 使用 VolcanoTtsService 替代 VolcanoTtsApiService
  final VolcanoTtsService _ttsService = Get.put(VolcanoTtsService());
  
  // 可观察状态
  final isSpeaking = false.obs;
  final errorMessage = ''.obs;
  final isLoading = false.obs;
  final statusMessage = '未连接'.obs;
  
  // 添加实际音频播放状态
  final isAudioPlaying = false.obs;
  
  // 播放状态检查定时器
  Timer? _playbackCheckTimer;
  
  // 当前播放的索引
  final currentPlayingIndex = RxInt(-1);
  
  // 当前使用的语音 - 使用预定义的值
  final currentVoice = 'zh_female_meilinvyou_moon_bigtts'.obs;
  
  // 可用的语音列表
  final List<Map<String, String>> availableVoices = [
    {'id': 'zh_female_meilinvyou_moon_bigtts', 'name': '魅力女友'},
    {'id': 'zh_male_shaonianzixin_moon_bigtts', 'name': '少年梓辛/Brayan'},
    {'id': 'zh_male_beijingxiaoye_moon_bigtts', 'name': '北京小爷'},
    {'id': 'zh_female_daimengchuanmei_moon_bigtts', 'name': '呆萌川妹'},
    {'id': 'zh_female_wanqudashu_moon_bigtts', 'name': '湾区大叔'},
    {'id': 'zh_female_sajiaonvyou_moon_bigtts', 'name': '撒娇女友'},
    {'id': 'zh_male_shenyeboke_moon_bigtts', 'name': '深夜播客'},
  ];
  
  // 固定的播报内容
  final RxList<String> speechTexts = <String>[
    '这是第一条播报测试，请听取合成效果。',
    '这是第二条播报测试，火山语音合成支持连续多条播报。',
    '这是第三条播报测试，可以测试语音合成的流畅度和连贯性。',
    '这是第四条播报测试，感谢您的使用。',
  ].obs;
  
  @override
  void onInit() {
    super.onInit();
    
    // 初始化UI状态
    isSpeaking.value = false;
    isAudioPlaying.value = false;
    errorMessage.value = '';
    isLoading.value = false;
    
    // 监听TTS播放状态
    ever(_ttsService.isPlaying, (bool playing) {
      isAudioPlaying.value = playing;
      if (!playing && currentPlayingIndex.value >= 0) {
        // 如果播放结束，重置当前播放索引
        currentPlayingIndex.value = -1;
      }
    });
    
    // 启动播放状态检查定时器
    _startPlaybackCheckTimer();
  }
  
  /// 更新UI状态
  void updateUIState() {
    // 强制更新UI
    update();
  }
  
  /// 播放单条文本
  Future<void> playSingle(int index) async {
    if (index < 0 || index >= speechTexts.length) {
      return;
    }
    
    try {
      isSpeaking.value = true;
      isAudioPlaying.value = true;
      errorMessage.value = '';
      currentPlayingIndex.value = index;
      statusMessage.value = '正在合成...';
      
      final text = speechTexts[index];
      
      // 播放文本
      await _ttsService.speak(text);
      
      statusMessage.value = '合成完成';
      
    } catch (e) {
      errorMessage.value = '播放出错';
      statusMessage.value = '错误';
      Logger.error('播放出错: $e');
    } finally {
      isSpeaking.value = false;
      if (!_ttsService.isPlaying.value) {
        isAudioPlaying.value = false;
        currentPlayingIndex.value = -1;
      }
    }
  }
  
  // 启动播放状态检查定时器
  void _startPlaybackCheckTimer() {
    _playbackCheckTimer?.cancel();
    _playbackCheckTimer = Timer.periodic(const Duration(milliseconds: 200), (timer) {
      // 更新实际播放状态
      final actuallyPlaying = _ttsService.isPlaying.value;
      isAudioPlaying.value = actuallyPlaying;
      
      // 如果不再播放，确保重置状态
      if (!actuallyPlaying && isSpeaking.value) {
        // 播放已完成，重置状态
        isSpeaking.value = false;
        currentPlayingIndex.value = -1;
        // 更新UI
        update();
      }
    });
  }
  
  /// 连续播放所有文本
  Future<void> speakContinuousTexts() async {
    if (isAudioPlaying.value || isLoading.value) {
      return;
    }
    
    try {
      isSpeaking.value = true;
      errorMessage.value = '';
      statusMessage.value = '开始连续播放';
      
      // 连接所有文本
      final allText = speechTexts.join('');
      
      // 播放所有文本
      await _ttsService.speak(allText);
      
      statusMessage.value = '连续播放完成';
      
    } catch (e) {
      errorMessage.value = '连续播放出错';
      statusMessage.value = '错误';
      Logger.error('连续播放出错: $e');
    } finally {
      isSpeaking.value = false;
    }
  }
  
  /// 停止播放
  Future<void> stopSpeaking() async {
    try {
      await _ttsService.stop();
      isSpeaking.value = false;
      isAudioPlaying.value = false;
      currentPlayingIndex.value = -1;
      statusMessage.value = '已停止';
    } catch (e) {
      errorMessage.value = '停止播放出错';
      Logger.error('停止播放出错: $e');
    }
  }
  
  /// 切换语音
  void changeVoice(String voiceId) {
    currentVoice.value = voiceId;
    // VolcanoTtsService 不需要显式设置发音人，在 speak 时会使用环境变量中的默认发音人
  }
  
  /// 切换启用状态
  void toggleEnabled() {
    _ttsService.isEnabled.toggle();
    statusMessage.value = _ttsService.isEnabled.value ? '已启用' : '已禁用';
  }
  
  @override
  void onClose() {
    // 取消定时器
    _playbackCheckTimer?.cancel();
    
    // 停止播放
    _ttsService.stop();
    
    super.onClose();
  }
}