app.py

import gradio as gr
import os
import tempfile
import logging
from podcastfy.client import generate_podcast
from dotenv import load_dotenv

# Configure logging
logging.basicConfig(level=logging.DEBUG)
logger = logging.getLogger(__name__)

# Load environment variables
load_dotenv()

def get_api_key(key_name, ui_value):
    return ui_value if ui_value else os.getenv(key_name)

def process_inputs(

    text_input, 

    urls_input,

    pdf_files,

    image_files,

    gemini_key,

    openai_key,

    openai_base_url,  # 新增参数

    elevenlabs_key,

    word_count,

    conversation_style,

    roles_person1,

    roles_person2,

    dialogue_structure,

    podcast_name,

    podcast_tagline,

    output_language,

    tts_model,

    creativity_level,

    user_instructions,

    api_key_label,

    llm_model_name,

    longform,

):
    try:
        logger.info("Starting podcast generation process")
        
        # API key handling
        logger.debug("Setting API keys")
        os.environ["GEMINI_API_KEY"] = get_api_key("GEMINI_API_KEY", gemini_key)
        
        if tts_model == "openai":
            logger.debug("Setting OpenAI API key")
            if not openai_key and not os.getenv("OPENAI_API_KEY"):
                raise ValueError("OpenAI API key is required when using OpenAI TTS model")
            os.environ["OPENAI_API_KEY"] = get_api_key("OPENAI_API_KEY", openai_key)
            if openai_base_url:
                os.environ["OPENAI_API_BASE"] = openai_base_url

        if tts_model == "elevenlabs":
            logger.debug("Setting ElevenLabs API key")
            if not elevenlabs_key and not os.getenv("ELEVENLABS_API_KEY"):
                raise ValueError("ElevenLabs API key is required when using ElevenLabs TTS model")
            os.environ["ELEVENLABS_API_KEY"] = get_api_key("ELEVENLABS_API_KEY", elevenlabs_key)
        
        # Process URLs
        urls = [url.strip() for url in urls_input.split('\n') if url.strip()]
        logger.debug(f"Processed URLs: {urls}")
        
        temp_files = []
        temp_dirs = []
        
        # Handle PDF files
        if pdf_files is not None and len(pdf_files) > 0:
            logger.info(f"Processing {len(pdf_files)} PDF files")
            pdf_temp_dir = tempfile.mkdtemp()
            temp_dirs.append(pdf_temp_dir)
            
            for i, pdf_file in enumerate(pdf_files):
                pdf_path = os.path.join(pdf_temp_dir, f"input_pdf_{i}.pdf")
                temp_files.append(pdf_path)
                
                with open(pdf_path, 'wb') as f:
                    f.write(pdf_file)
                urls.append(pdf_path)
                logger.debug(f"Saved PDF {i} to {pdf_path}")
        
        # Handle image files
        image_paths = []
        if image_files is not None and len(image_files) > 0:
            logger.info(f"Processing {len(image_files)} image files")
            img_temp_dir = tempfile.mkdtemp()
            temp_dirs.append(img_temp_dir)
            
            for i, img_file in enumerate(image_files):
                # Get file extension from the original name in the file tuple
                original_name = img_file.orig_name if hasattr(img_file, 'orig_name') else f"image_{i}.jpg"
                extension = original_name.split('.')[-1]
                
                logger.debug(f"Processing image file {i}: {original_name}")
                img_path = os.path.join(img_temp_dir, f"input_image_{i}.{extension}")
                temp_files.append(img_path)
                
                try:
                    # Write the bytes directly to the file
                    with open(img_path, 'wb') as f:
                        if isinstance(img_file, (tuple, list)):
                            f.write(img_file[1])  # Write the bytes content
                        else:
                            f.write(img_file)     # Write the bytes directly
                    image_paths.append(img_path)
                    logger.debug(f"Saved image {i} to {img_path}")
                except Exception as e:
                    logger.error(f"Error saving image {i}: {str(e)}")
                    raise
        
        # Prepare conversation config
        logger.debug("Preparing conversation config")
        conversation_config = {
            "word_count": word_count,
            "conversation_style": conversation_style.split(','),
            "roles_person1": roles_person1,
            "roles_person2": roles_person2,
            "dialogue_structure": dialogue_structure.split(','),
            "podcast_name": podcast_name,
            "podcast_tagline": podcast_tagline,
            "output_language": output_language,
            "creativity": creativity_level,
            "user_instructions": user_instructions,
            "api_key_label": api_key_label,
            "llm_model_name": llm_model_name,
            "longform": longform,
        }
        
        # Generate podcast
        logger.info("Calling generate_podcast function")
        logger.debug(f"URLs: {urls}")
        logger.debug(f"Image paths: {image_paths}")
        logger.debug(f"Text input present: {'Yes' if text_input else 'No'}")
        
        audio_file = generate_podcast(
            urls=urls if urls else None,
            text=text_input if text_input else None,
            image_paths=image_paths if image_paths else None,
            tts_model=tts_model,
            conversation_config=conversation_config
        )
        
        logger.info("Podcast generation completed")
        
        # Cleanup
        logger.debug("Cleaning up temporary files")
        for file_path in temp_files:
            if os.path.exists(file_path):
                os.unlink(file_path)
                logger.debug(f"Removed temp file: {file_path}")
        for dir_path in temp_dirs:
            if os.path.exists(dir_path):
                os.rmdir(dir_path)
                logger.debug(f"Removed temp directory: {dir_path}")
        
        return audio_file
        
    except Exception as e:
        logger.error(f"Error in process_inputs: {str(e)}", exc_info=True)
        # Cleanup on error
        for file_path in temp_files:
            if os.path.exists(file_path):
                os.unlink(file_path)
        for dir_path in temp_dirs:
            if os.path.exists(dir_path):
                os.rmdir(dir_path)
        return str(e)

# Create Gradio interface with updated theme
with gr.Blocks(
    title="AI播客plus",
    theme=gr.themes.Base(
        primary_hue="blue",
        secondary_hue="slate",
        neutral_hue="slate"
    ),
    css="""

        /* Move toggle arrow to left side */

        .gr-accordion {

            --accordion-arrow-size: 1.5em;

        }

        .gr-accordion > .label-wrap {

            flex-direction: row !important;

            justify-content: flex-start !important;

            gap: 1em;

        }

        .gr-accordion > .label-wrap > .icon {

            order: -1;

        }

    """
) as demo:
    with gr.Tab("默认环境变量已设置 Gemini、OpenAI API Key "):
        # API Keys Section
        with gr.Row():
            gr.Markdown(
                """

                <h2 style='color: #2196F3; margin-bottom: 10px; padding: 10px 0;'>

                    🔑 API Keys

                </h2>

                """,
                elem_classes=["section-header"]
            )
            theme_btn = gr.Button("🌓", scale=0, min_width=0)
        with gr.Accordion("配置 API Keys", open=False):
            gemini_key = gr.Textbox(
                label="Gemini API Key", 
                type="password", 
                value="",
                info="必须的"
            )
            openai_key = gr.Textbox(
                label="OpenAI API Key", 
                type="password", 
                value="",
                info="只有在使用OpenAI文本转语音模型的情况下才需要此项"
            )
            openai_base_url = gr.Textbox(
                label="OpenAI Base URL",
                value="",
                info="可选，留空使用默认URL：https://api.openai.com/v1"
            )
            elevenlabs_key = gr.Textbox(
                label="ElevenLabs API Key",
                type="password",
                value="",
                info="建议使用ElevenLabs TTS模型，仅在使用该模型时才需要此项"
            )

        # Content Input Section
        gr.Markdown(
            """

            <h2 style='color: #2196F3; margin-bottom: 10px; padding: 10px 0;'>

                📝 输入内容

            </h2>

            """,
            elem_classes=["section-header"]
        )
        with gr.Accordion("设置输入内容", open=False):
            with gr.Group():
                text_input = gr.Textbox(
                    label="文本输入", 
                    placeholder="在此输入或粘贴文字...", 
                    lines=3
                )
                urls_input = gr.Textbox(
                    label="URLs", 
                    placeholder="请逐行输入网址，支持网站和YouTube视频链接.", 
                    lines=3
                )
                
                # Place PDF and Image uploads side by side
                with gr.Row():
                    with gr.Column():
                        pdf_files = gr.Files(  # Changed from gr.File to gr.Files
                            label="上传 PDFs",  # Updated label
                            file_types=[".pdf"],
                            type="binary"
                        )
                        gr.Markdown("*上传一个或多个PDF文件来创建播客*", elem_classes=["file-info"])
                    
                    with gr.Column():
                        image_files = gr.Files(
                            label="上传图片",
                            file_types=["image"],
                            type="binary"
                        )
                        gr.Markdown("*上传一个或多个图片文件来创建播客*", elem_classes=["file-info"])
        
        # Customization Section
        gr.Markdown(
            """

            <h2 style='color: #2196F3; margin-bottom: 10px; padding: 10px 0;'>

                ⚙️ 自定义选项

            </h2>

            """,
            elem_classes=["section-header"]
        )
        with gr.Accordion("自定义选项", open=False):
            # Basic Settings
            gr.Markdown(
                """

                <h3 style='color: #1976D2; margin: 15px 0 10px 0;'>

                    📊 基本设置

                </h3>

                """,
            )
            word_count = gr.Slider(
                minimum=500, 
                maximum=5000, 
                value=2000, 
                step=100, 
                label="字数统计",
                info="目标字数（用于生成内容）"
            )
            
            conversation_style = gr.Textbox(
                label="对话风格", 
                value="生动活泼,节奏明快,热情洋溢",
                info="用于对话的风格列表（以逗号分隔）"
            )
            
            # Roles and Structure
            gr.Markdown(
                """

                <h3 style='color: #1976D2; margin: 15px 0 10px 0;'>

                    👥 角色设定与结构安排

                </h3>

                """,
            )
            roles_person1 = gr.Textbox(
                label="第一位发言者的角色",
                value="主要负责总结的人",
                info="在对话中，第一个说话人扮演的角色"
            )
            
            roles_person2 = gr.Textbox(
                label="第二位发言者的角色",
                value="提问者/释疑者",
                info="在对话中，第二个说话人所扮演的角色或承担的任务"
            )
            
            dialogue_structure = gr.Textbox(
                label="对话结构",
                value="引言,主要内容的概括,总结",
                info="对话结构的各个部分（用逗号隔开）"
            )
            
            # Podcast Identity
            gr.Markdown(
                """

                <h3 style='color: #1976D2; margin: 15px 0 10px 0;'>

                    🎙️ 播客特色

                </h3>

                """,
            )
            podcast_name = gr.Textbox(
                label="播客名",
                value="猛然间",
                info="播客的名字"
            )
            
            podcast_tagline = gr.Textbox(
                label="播客宣传语",
                value="猛然回首，太匆匆",
                info="播客的宣传语或副标题"
            )

            output_language = gr.Textbox(
                label="输出语言",
                value="Chinese",
                info="播客使用的语言"
            )

            api_key_label = gr.Textbox(
                label="自定义基于云的 LLM",
                value="GEMINI_API_KEY",
                info="可选，默认使用 Gemini，如使用 OPENAI，上面填入 'OPENAI_API_KEY' 并保证设置好环境变量且设置好下面的模型"
            )

            llm_model_name = gr.Textbox(
                label="设置好对应自定义基于云的 LLM 模型",
                value="gemini-1.5-pro-latest",
                info="可选，配合上面的参数，默认是 Gemini 的 gemini-1.5-pro-latest，默认 OPENAI 可支持模型 api.168369.xyz/v1/models 获取"
            )

            longform = gr.Checkbox(
                label="长篇模式",
                value=False,
                info="启用长篇内容生成模式"
            )
            
            # Voice Settings
            gr.Markdown(
                """

                <h3 style='color: #1976D2; margin: 15px 0 10px 0;'>

                    🗣️ 语音设置

                </h3>

                """,
            )
            tts_model = gr.Radio(
                choices=["openai", "elevenlabs", "edge"],
                value="openai",
                label="文本转语音模型",
                info="选择语音合成模型 (edge 免费但音质较差, 其他模型音质更好但需申请 API keys)"
            )
            
            # Advanced Settings
            gr.Markdown(
                """

                <h3 style='color: #1976D2; margin: 15px 0 10px 0;'>

                    🔧 高级选项

                </h3>

                """,
            )
            creativity_level = gr.Slider(
                minimum=0, 
                maximum=1, 
                value=0.7, 
                step=0.1, 
                label="创意等级",
                info="调节生成对话的创意程度（0 为注重事实，1 为更具创意）"
            )
            
            user_instructions = gr.Textbox(
                label="个性化指令",
                value="",
                lines=2,
                placeholder="在此处添加你希望AI遵循的具体指令，以控制对话的走向和内容...",
                info="一些额外的指令，用来帮助AI更好地理解你想要聊天的内容和方向"
            )
    
    # Output Section
    gr.Markdown(
        """

        <h2 style='color: #2196F3; margin-bottom: 10px; padding: 10px 0;'>

            🎵 生成结果

        </h2>

        """,
        elem_classes=["section-header"]
    )
    with gr.Group():
        generate_btn = gr.Button("🎙️ 生成播客", variant="primary")
        audio_output = gr.Audio(
            type="filepath", 
            label="生成的播客"
        )
    
    # Handle generation
    generate_btn.click(
        process_inputs,
        inputs=[
            text_input, urls_input, pdf_files, image_files,
            gemini_key, openai_key, openai_base_url,
            elevenlabs_key,
            word_count, conversation_style,
            roles_person1, roles_person2,
            dialogue_structure, podcast_name,
            podcast_tagline, output_language, tts_model,
            creativity_level, user_instructions,
            api_key_label, llm_model_name, longform
        ],
        outputs=audio_output
    )

    # Add theme toggle functionality
    theme_btn.click(
        None,
        None,
        None,
        js="""

        function() {

            document.querySelector('body').classList.toggle('dark');

            return [];

        }

        """
    )

if __name__ == "__main__":
    demo.queue().launch(share=True)