app.py

from tts_voice import tts_order_voice
import edge_tts
import gradio as gr
import tempfile
import anyio
import asyncio

from edge_tts.exceptions import NoAudioReceived # Import the specific exception

# --- Voice Data ---
# Uses the dictionary loaded from your tts_voice.py file
language_dict = tts_order_voice
DEFAULT_LANGUAGE = list(language_dict.keys())[0]

# --- Core TTS Function (Asynchronous) ---
async def text_to_speech_edge(text, language_code):
    voice = language_dict[language_code]
    
    # Try block to catch the failure
    try:
        communicate = edge_tts.Communicate(text, voice)
        with tempfile.NamedTemporaryFile(delete=False, suffix=".mp3") as tmp_file:
            tmp_path = tmp_file.name
        
        await communicate.save(tmp_path)
        
        return "语音合成完成：{}".format(text), tmp_path
        
    except NoAudioReceived as e:
        error_msg = f"ERROR: Failed to generate audio for voice '{voice}'. The Edge TTS service did not return any audio data. Please try a different voice, use shorter text, or upgrade the 'edge-tts' library. Details: {str(e)}"
        print(error_msg)
        
        # Return the error message and None for audio
        return error_msg, None
        
    except Exception as e:
        error_msg = f"An unexpected error occurred: {str(e)}"
        print(error_msg)
        return error_msg, None


# --- Gradio UI Definition ---
input_text = gr.Textbox(lines=5, label="输入文本") 
output_text = gr.Textbox(label="输出文本") 
output_audio = gr.Audio(type="filepath", label="导出文件") 

language = gr.Dropdown(
    choices=list(language_dict.keys()), 
    value=DEFAULT_LANGUAGE, 
    label="语言"
) 


# --- Gradio Interface Definition and Launch ---
# Note: Since the core function is async, we use asyncio for launch
interface = gr.Interface(
    fn=text_to_speech_edge,
    inputs=[input_text, language],
    outputs=[output_text, output_audio],
    title="Edge TTS 文字转语音 (Cloud API)",
    description="使用微软 Edge TTS 提供的云服务，稳定且无需本地模型加载。"
)

if __name__ == "__main__":
    # Ensure anyio is used to run the async Gradio app
    anyio.run(interface.launch, backend="asyncio")