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

class TtsTestView extends GetView<TtsTestController> {
  const TtsTestView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    // 强制更新控制器状态
    WidgetsBinding.instance.addPostFrameCallback((_) {
      // 在下一帧渲染完成后调用
      controller.updateUIState();
    });
    
    return Scaffold(
      appBar: AppBar(
        title: const Text('语音合成测试'),
        centerTitle: true,
      ),
      body: SingleChildScrollView(
        child: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              // 播放控制
              Card(
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      const Text(
                        '播放控制',
                        style: TextStyle(
                          fontSize: 16,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      const SizedBox(height: 16),
                      Row(
                        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                        children: [
                          Obx(() {
                            return ElevatedButton.icon(
                              onPressed: controller.isAudioPlaying.value || controller.isLoading.value
                                  ? null 
                                  : () => controller.speakContinuousTexts(),
                              icon: controller.isAudioPlaying.value 
                                  ? const SizedBox(
                                      width: 20, 
                                      height: 20, 
                                      child: CircularProgressIndicator(strokeWidth: 2)
                                    )
                                  : const Icon(Icons.playlist_play),
                              label: Text(controller.isAudioPlaying.value ? '播放中...' : '全部播放'),
                              style: ElevatedButton.styleFrom(
                                backgroundColor: Colors.blue,
                                foregroundColor: Colors.white,
                              ),
                            );
                          }),
                          Obx(() => ElevatedButton.icon(
                            onPressed: controller.isAudioPlaying.value
                                ? () => controller.stopSpeaking()
                                : null,
                            icon: const Icon(Icons.stop),
                            label: const Text('停止'),
                            style: ElevatedButton.styleFrom(
                              backgroundColor: Colors.red,
                              foregroundColor: Colors.white,
                            ),
                          )),
                        ],
                      ),
                    ],
                  ),
                ),
              ),
              
              const SizedBox(height: 16),
              
              // 播报内容列表
              Card(
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      const Text(
                        '播报内容列表',
                        style: TextStyle(
                          fontSize: 16,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      const SizedBox(height: 16),
                      // 生成5条可点击的播报内容
                      Obx(() => ListView.separated(
                        shrinkWrap: true,
                        physics: const NeverScrollableScrollPhysics(),
                        itemCount: controller.speechTexts.length,
                        separatorBuilder: (context, index) => const Divider(height: 1),
                        itemBuilder: (context, index) {
                          final isPlaying = controller.isAudioPlaying.value && 
                                          controller.currentPlayingIndex.value == index;
                          
                          return ListTile(
                            title: Text(
                              controller.speechTexts[index],
                              style: TextStyle(
                                fontWeight: isPlaying ? FontWeight.bold : FontWeight.normal,
                                color: isPlaying ? Colors.blue : null,
                              ),
                            ),
                            leading: CircleAvatar(
                              backgroundColor: isPlaying ? Colors.blue : Colors.grey.shade200,
                              radius: 18,
                              child: Icon(
                                isPlaying ? Icons.volume_up : Icons.play_arrow,
                                color: isPlaying ? Colors.white : Colors.black,
                                size: 20,
                              ),
                            ),
                            trailing: isPlaying
                                ? const SizedBox(
                                    width: 20,
                                    height: 20,
                                    child: CircularProgressIndicator(strokeWidth: 2),
                                  )
                                : null,
                            onTap: controller.isAudioPlaying.value || controller.isLoading.value
                                ? null
                                : () => controller.playSingle(index),
                            enabled: !(controller.isAudioPlaying.value || controller.isLoading.value),
                            tileColor: isPlaying ? Colors.blue.withOpacity(0.1) : null,
                            shape: RoundedRectangleBorder(
                              borderRadius: BorderRadius.circular(8),
                              side: isPlaying
                                  ? const BorderSide(color: Colors.blue, width: 1)
                                  : BorderSide.none,
                            ),
                          );
                        },
                      )),
                    ],
                  ),
                ),
              ),
              
              const SizedBox(height: 16),
              
              // 状态显示
              Card(
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      const Text(
                        '状态',
                        style: TextStyle(
                          fontSize: 16,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      const SizedBox(height: 8),
                      Obx(() => Text(
                        controller.statusMessage.value,
                        style: TextStyle(
                          color: controller.isLoading.value
                              ? Colors.orange
                              : controller.isAudioPlaying.value
                                  ? Colors.green 
                                  : Colors.grey,
                          fontWeight: FontWeight.bold,
                        ),
                      )),
                      const SizedBox(height: 8),
                      Obx(() => controller.errorMessage.value.isNotEmpty
                          ? Container(
                              padding: const EdgeInsets.all(8),
                              decoration: BoxDecoration(
                                color: Colors.red.shade50,
                                borderRadius: BorderRadius.circular(4),
                                border: Border.all(color: Colors.red.shade200),
                              ),
                              child: Column(
                                crossAxisAlignment: CrossAxisAlignment.start,
                                children: [
                                  Row(
                                    children: [
                                      Icon(Icons.error_outline, color: Colors.red, size: 16),
                                      SizedBox(width: 8),
                                      Text(
                                        '错误',
                                        style: TextStyle(
                                          color: Colors.red,
                                          fontWeight: FontWeight.bold,
                                        ),
                                      ),
                                    ],
                                  ),
                                  SizedBox(height: 4),
                                  Text(
                                    controller.errorMessage.value,
                                    style: TextStyle(color: Colors.red.shade800),
                                  ),
                                ],
                              ),
                            )
                          : const SizedBox.shrink()),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}