app.py

import gradio as gr
from huggingface_hub import InferenceClient
import random

# Initialize the inference client
client = InferenceClient("HuggingFaceH4/zephyr-7b-beta")

# Story genres with genre-specific example prompts
GENRE_EXAMPLES = {
    "fantasy": [
        "I enter the ancient forest seeking the wizard's tower",
        "I approach the dragon cautiously with my shield raised",
        "I examine the mysterious runes carved into the stone altar",
        "I try to bargain with the elven council for safe passage"
    ],
    "sci-fi": [
        "I hack into the space station's mainframe",
        "I investigate the strange signal coming from the abandoned planet",
        "I negotiate with the alien ambassador about the peace treaty",
        "I try to repair my damaged spacecraft before oxygen runs out"
    ],
    "mystery": [
        "I examine the crime scene for overlooked evidence",
        "I question the nervous butler about the night of the murder",
        "I follow the suspicious figure through the foggy streets",
        "I check the victim's diary for hidden clues"
    ],
    "horror": [
        "I slowly open the creaking door to the basement",
        "I read the forbidden text while the candles flicker",
        "I hide under the bed as footsteps approach",
        "I investigate the strange noises coming from the attic"
    ],
    "western": [
        "I challenge the outlaw to a duel at high noon",
        "I track the bandits through the desert canyon",
        "I enter the saloon looking for information",
        "I defend the stagecoach from the approaching raiders"
    ],
    "cyberpunk": [
        "I jack into the corporate mainframe to steal data",
        "I negotiate with the street gang for cybernetic upgrades",
        "I hide in the neon-lit alleyway from corporate security",
        "I meet my mysterious client in the underground bar"
    ],
    "historical": [
        "I attend the royal ball hoping to meet the mysterious count",
        "I join the resistance against the occupying forces",
        "I navigate the dangerous politics of the royal court",
        "I set sail on a voyage to discover new lands"
    ],
    "post-apocalyptic": [
        "I scavenge the abandoned shopping mall for supplies",
        "I approach the fortified settlement seeking shelter",
        "I navigate through the radioactive zone using my old map",
        "I hide from the approaching group of raiders"
    ],
    "steampunk": [
        "I pilot my airship through the lightning storm",
        "I present my new invention to the Royal Academy",
        "I investigate the mysterious clockwork automaton",
        "I sneak aboard the emperor's armored train"
    ]
}

def get_examples_for_genre(genre):
    """Get example prompts specific to the selected genre"""
    if genre in GENRE_EXAMPLES:
        return GENRE_EXAMPLES[genre]
    else:
        return GENRE_EXAMPLES["fantasy"]  # Default to fantasy

def get_enhanced_system_prompt(genre=None):
    """Generate a detailed system prompt with optional genre specification"""
    selected_genre = genre or "fantasy"
    
    system_message = f"""You are an interactive storyteller creating an immersive {selected_genre} choose-your-own-adventure story.

For each response:
1. Provide vivid sensory descriptions of the scene, environment, and characters
2. Include meaningful dialogue or internal monologue that reveals character motivations
3. End with exactly 3 different possible actions or decisions, each offering a distinct path
4. Maintain consistent world-building and character development
5. Incorporate appropriate atmosphere and tone for a {selected_genre} setting
6. Remember previous choices to create a coherent narrative arc

Format your three options as:
- Option 1: [Complete sentence describing a possible action]
- Option 2: [Complete sentence describing a possible action]
- Option 3: [Complete sentence describing a possible action]

Keep responses engaging but concise (200-300 words maximum). If the user's input doesn't clearly indicate a choice, interpret their intent and move the story forward in the most logical direction."""
    
    return system_message

def respond(message, history, genre=None):
    """Generate a response based on the current message and conversation history"""
    # Use a more detailed system prompt
    system_message = get_enhanced_system_prompt(genre)
    
    # Format history correctly for the API
    formatted_history = []
    for h in history:
        if isinstance(h, list) and len(h) == 2:
            # Handle old tuple format if it exists
            formatted_history.append({"role": "user", "content": h[0]})
            formatted_history.append({"role": "assistant", "content": h[1]})
        elif isinstance(h, dict) and "role" in h and "content" in h:
            # Handle new dictionary format
            formatted_history.append(h)
    
    # Create proper API messages
    api_messages = [{"role": "system", "content": system_message}]
    
    # Add limited history to prevent token overflow (only use recent exchanges)
    # Limit to last 5 exchanges
    memory_length = 5
    if formatted_history:
        for msg in formatted_history[-memory_length*2:]:
            api_messages.append(msg)
    
    # Add current message
    api_messages.append({"role": "user", "content": message})
    
    # Special handling for story initialization
    if not history or message.lower() in ["start", "begin", "begin my adventure"]:
        # Add a specific instruction for starting a new story
        api_messages.append({
            "role": "system", 
            "content": f"Begin a new {genre or 'fantasy'} adventure with an intriguing opening scene. Introduce the protagonist without assuming too much about them, allowing the user to shape the character."
        })
    
    # Generate and stream response
    bot_message = ""
    try:
        for response in client.chat_completion(
            api_messages,
            max_tokens=512,
            stream=True,
            temperature=0.7,
            top_p=0.95,
        ):
            delta = response.choices[0].delta.content
            if delta:
                bot_message += delta
                yield history + [[message, bot_message]]
    except Exception as e:
        error_message = f"Story magic temporarily interrupted. Please try again. (Error: {str(e)})"
        yield history + [[message, error_message]]

def update_examples(genre):
    """Update the example prompts based on the selected genre"""
    examples = get_examples_for_genre(genre)
    examples.insert(0, "Begin my adventure")  # Always include this option
    return gr.Examples(
        examples=[[ex] for ex in examples],
        inputs=msg
    )

# Create interface with additional customization options
with gr.Blocks(theme=gr.themes.Soft()) as demo:
    gr.Markdown("# 🔮 Interactive Story Adventure")
    gr.Markdown("Immerse yourself in an interactive story where your choices shape the narrative.")
    
    with gr.Row():
        with gr.Column(scale=3):
            chatbot = gr.Chatbot(
                height=500,
                bubble_full_width=False,
                show_copy_button=True,
                avatar_images=(None, "🧙"),
            )
            msg = gr.Textbox(
                placeholder="Describe what you want to do next in the story...",
                container=False,
                scale=4,
            )
            
            with gr.Row():
                submit = gr.Button("Continue Story", variant="primary")
                clear = gr.Button("Start New Adventure")
                
        with gr.Column(scale=1):
            gr.Markdown("## Adventure Settings")
            genre = gr.Dropdown(
                choices=list(GENRE_EXAMPLES.keys()),
                label="Story Genre",
                info="Select a genre for your next adventure",
                value="fantasy"
            )
            
            # Initialize with fantasy examples
            examples_box = gr.Examples(
                examples=[[ex] for ex in get_examples_for_genre("fantasy")],
                inputs=msg,
                label="Examples"
            )
    
    # Update examples when genre changes
    genre.change(
        fn=update_examples,
        inputs=[genre],
        outputs=[examples_box]
    )
    
    # Set up event handlers for the chatbot
    msg.submit(respond, [msg, chatbot, genre], [chatbot])
    submit.click(respond, [msg, chatbot, genre], [chatbot])
    
    # Clear the chatbot for a new adventure
    clear.click(lambda: [], None, chatbot, queue=False)
    clear.click(lambda: "", None, msg, queue=False)

if __name__ == "__main__":
    demo.launch(server_name="0.0.0.0", server_port=7860)