app.py

# storyverse_weaver/app.py
import gradio as gr
import os
import time
import json 
from PIL import Image, ImageDraw, ImageFont 
import random
import traceback 

# --- Core Logic Imports ---
from core.llm_services import initialize_text_llms, is_gemini_text_ready, is_hf_text_ready, generate_text_gemini, generate_text_hf
from core.image_services import initialize_image_llms, STABILITY_API_CONFIGURED, OPENAI_DALLE_CONFIGURED, HF_IMAGE_API_CONFIGURED, generate_image_stabilityai, generate_image_dalle, generate_image_hf_model, ImageGenResponse
from core.story_engine import Story, Scene
from prompts.narrative_prompts import get_narrative_system_prompt, format_narrative_user_prompt
from prompts.image_style_prompts import STYLE_PRESETS, COMMON_NEGATIVE_PROMPTS, format_image_generation_prompt
from core.utils import basic_text_cleanup

# --- Initialize Services ---
initialize_text_llms()
initialize_image_llms()

# --- Get API Readiness Status ---
GEMINI_TEXT_IS_READY = is_gemini_text_ready()
HF_TEXT_IS_READY = is_hf_text_ready() # For text models
STABILITY_API_IS_READY = STABILITY_API_CONFIGURED
OPENAI_DALLE_IS_READY = OPENAI_DALLE_CONFIGURED
HF_IMAGE_IS_READY = HF_IMAGE_API_CONFIGURED # For image models via HF API

# --- Application Configuration (Models, Defaults) ---
TEXT_MODELS = {}
UI_DEFAULT_TEXT_MODEL_KEY = None
if GEMINI_TEXT_IS_READY:
    TEXT_MODELS["✨ Gemini 1.5 Flash (Narrate)"] = {"id": "gemini-1.5-flash-latest", "type": "gemini"}
    TEXT_MODELS["Legacy Gemini 1.0 Pro (Narrate)"] = {"id": "gemini-1.0-pro-latest", "type": "gemini"}
if HF_TEXT_IS_READY:
    TEXT_MODELS["Mistral 7B (Narrate via HF)"] = {"id": "mistralai/Mistral-7B-Instruct-v0.2", "type": "hf_text"}
    TEXT_MODELS["Gemma 2B (Narrate via HF)"] = {"id": "google/gemma-2b-it", "type": "hf_text"}

if TEXT_MODELS:
    if GEMINI_TEXT_IS_READY and "✨ Gemini 1.5 Flash (Narrate)" in TEXT_MODELS: UI_DEFAULT_TEXT_MODEL_KEY = "✨ Gemini 1.5 Flash (Narrate)"
    elif HF_TEXT_IS_READY and "Mistral 7B (Narrate via HF)" in TEXT_MODELS: UI_DEFAULT_TEXT_MODEL_KEY = "Mistral 7B (Narrate via HF)"
    elif TEXT_MODELS: UI_DEFAULT_TEXT_MODEL_KEY = list(TEXT_MODELS.keys())[0]
else:
    TEXT_MODELS["No Text Models Configured"] = {"id": "dummy_text_error", "type": "none"}
    UI_DEFAULT_TEXT_MODEL_KEY = "No Text Models Configured"


IMAGE_PROVIDERS = {}
UI_DEFAULT_IMAGE_PROVIDER_KEY = None
# Order of preference for default: Stability, then HF, then DALL-E (simulated)
if STABILITY_API_IS_READY: IMAGE_PROVIDERS["🎨 Stability AI (SDXL)"] = "stability_ai"
if HF_IMAGE_IS_READY: 
    IMAGE_PROVIDERS["🎡 HF Model (SDXL Base)"] = "hf_image_sdxl_base" # Key for SDXL via HF
    IMAGE_PROVIDERS["🎠 HF Model (OpenJourney)"] = "hf_image_openjourney" # Key for OpenJourney via HF
if OPENAI_DALLE_IS_READY: IMAGE_PROVIDERS["🖼️ DALL-E 3 (Sim.)"] = "dalle"

if IMAGE_PROVIDERS:
    if STABILITY_API_IS_READY and "🎨 Stability AI (SDXL)" in IMAGE_PROVIDERS: UI_DEFAULT_IMAGE_PROVIDER_KEY = "🎨 Stability AI (SDXL)"
    elif HF_IMAGE_IS_READY and "🎡 HF Model (SDXL Base)" in IMAGE_PROVIDERS: UI_DEFAULT_IMAGE_PROVIDER_KEY = "🎡 HF Model (SDXL Base)"
    elif OPENAI_DALLE_IS_READY and "🖼️ DALL-E 3 (Sim.)" in IMAGE_PROVIDERS: UI_DEFAULT_IMAGE_PROVIDER_KEY = "🖼️ DALL-E 3 (Sim.)"
    else: UI_DEFAULT_IMAGE_PROVIDER_KEY = list(IMAGE_PROVIDERS.keys())[0]
else:
    IMAGE_PROVIDERS["No Image Providers Configured"] = "none"
    UI_DEFAULT_IMAGE_PROVIDER_KEY = "No Image Providers Configured"


# --- Gradio UI Theme and CSS ---
omega_theme = gr.themes.Base(
    font=[gr.themes.GoogleFont("Lexend Deca"), "ui-sans-serif", "system-ui", "sans-serif"],
    primary_hue=gr.themes.colors.purple, secondary_hue=gr.themes.colors.pink, neutral_hue=gr.themes.colors.slate
).set(
    body_background_fill="#0F0F1A", block_background_fill="#1A1A2E", block_border_width="1px",
    block_border_color="#2A2A4A", block_label_background_fill="#2A2A4A", input_background_fill="#2A2A4A",
    input_border_color="#4A4A6A", button_primary_background_fill="linear-gradient(135deg, #7F00FF 0%, #E100FF 100%)",
    button_primary_text_color="white", button_secondary_background_fill="#4A4A6A",
    button_secondary_text_color="#E0E0FF", slider_color="#A020F0"
)
omega_css = """
body, .gradio-container { background-color: #0F0F1A !important; color: #D0D0E0 !important; }
.gradio-container { max-width: 1400px !important; margin: auto !important; border-radius: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.2); padding: 25px !important; border: 1px solid #2A2A4A;}
.gr-panel, .gr-box, .gr-accordion { background-color: #1A1A2E !important; border: 1px solid #2A2A4A !important; border-radius: 12px !important; box-shadow: 0 4px 15px rgba(0,0,0,0.1);}
.gr-markdown h1 { font-size: 2.8em !important; text-align: center; color: transparent; background: linear-gradient(135deg, #A020F0 0%, #E040FB 100%); -webkit-background-clip: text; background-clip: text; margin-bottom: 5px !important; letter-spacing: -1px;}
.gr-markdown h3 { color: #C080F0 !important; text-align: center; font-weight: 400; margin-bottom: 25px !important;}
.input-section-header { font-size: 1.6em; font-weight: 600; color: #D0D0FF; margin-top: 15px; margin-bottom: 8px; border-bottom: 2px solid #7F00FF; padding-bottom: 5px;}
.output-section-header { font-size: 1.8em; font-weight: 600; color: #D0D0FF; margin-top: 15px; margin-bottom: 12px;}
.gr-input input, .gr-input textarea, .gr-dropdown select, .gr-textbox textarea { background-color: #2A2A4A !important; color: #E0E0FF !important; border: 1px solid #4A4A6A !important; border-radius: 8px !important; padding: 10px !important;}
.gr-button { border-radius: 8px !important; font-weight: 500 !important; transition: all 0.2s ease-in-out !important;}
.gr-button-primary { padding-top: 10px !important; padding-bottom: 10px !important; } /* Ensure enough padding for icons/text */
.gr-button-primary:hover { transform: scale(1.03) translateY(-1px) !important; box-shadow: 0 8px 16px rgba(127,0,255,0.3) !important; }
.panel_image { border-radius: 12px !important; overflow: hidden; box-shadow: 0 6px 15px rgba(0,0,0,0.25) !important; background-color: #23233A;}
.panel_image img { max-height: 600px !important; }
.gallery_output { background-color: transparent !important; border: none !important; }
.gallery_output .thumbnail-item { border-radius: 8px !important; box-shadow: 0 3px 8px rgba(0,0,0,0.2) !important; margin: 6px !important; transition: transform 0.2s ease; height: 180px !important; width: 180px !important;}
.gallery_output .thumbnail-item:hover { transform: scale(1.05); }
.status_text { font-weight: 500; padding: 12px 18px; text-align: center; border-radius: 8px; margin-top:12px; border: 1px solid transparent; font-size: 1.05em;}
.error_text { background-color: #401010 !important; color: #FFB0B0 !important; border-color: #802020 !important; }
.success_text { background-color: #104010 !important; color: #B0FFB0 !important; border-color: #208020 !important;}
.processing_text { background-color: #102040 !important; color: #B0D0FF !important; border-color: #204080 !important;}
.important-note { background-color: rgba(127,0,255,0.1); border-left: 5px solid #7F00FF; padding: 15px; margin-bottom:20px; color: #E0E0FF; border-radius: 6px;}
.gr-tabitem { background-color: #1A1A2E !important; border-radius: 0 0 12px 12px !important; padding: 15px !important;}
.gr-tab-button.selected { background-color: #2A2A4A !important; color: white !important; border-bottom: 3px solid #A020F0 !important; border-radius: 8px 8px 0 0 !important; font-weight: 600 !important;}
.gr-tab-button { color: #A0A0C0 !important; border-radius: 8px 8px 0 0 !important;}
.gr-accordion > .gr-block { border-top: 1px solid #2A2A4A !important; }
.gr-markdown code { background-color: #2A2A4A !important; color: #C0C0E0 !important; padding: 0.2em 0.5em; border-radius: 4px; }
.gr-markdown pre { background-color: #23233A !important; padding: 1em !important; border-radius: 6px !important; border: 1px solid #2A2A4A !important;}
.gr-markdown pre > code { padding: 0 !important; background-color: transparent !important; }
#surprise_button { background: linear-gradient(135deg, #ff7e5f 0%, #feb47b 100%) !important; font-weight:600 !important;}
#surprise_button:hover { transform: scale(1.03) translateY(-1px) !important; box-shadow: 0 8px 16px rgba(255,126,95,0.3) !important; }
"""

# --- Helper: Placeholder Image Creation ---
def create_placeholder_image(text="Processing...", size=(512, 512), color="#23233A", text_color="#E0E0FF"):
    # ... (Full implementation as before) ...
    img = Image.new('RGB', size, color=color); draw = ImageDraw.Draw(img)
    try: font_path = "arial.ttf" if os.path.exists("arial.ttf") else None 
    except: font_path = None 
    try: font = ImageFont.truetype(font_path, 40) if font_path else ImageFont.load_default()
    except IOError: font = ImageFont.load_default()
    if hasattr(draw, 'textbbox'): bbox = draw.textbbox((0,0), text, font=font); tw, th = bbox[2]-bbox[0], bbox[3]-bbox[1]
    else: tw, th = draw.textsize(text, font=font) 
    draw.text(((size[0]-tw)/2, (size[1]-th)/2), text, font=font, fill=text_color); return img


# --- StoryVerse Weaver Orchestrator ---
def add_scene_to_story_orchestrator(
    current_story_obj: Story, scene_prompt_text: str, image_style_dropdown: str, artist_style_text: str,
    negative_prompt_text: str, text_model_key: str, image_provider_key: str,
    narrative_length: str, image_quality: str,
    progress=gr.Progress(track_tqdm=True)
):
    start_time = time.time() 
    if not current_story_obj: current_story_obj = Story() 
    
    log_accumulator = [f"**🚀 Scene {current_story_obj.current_scene_number + 1} - {time.strftime('%H:%M:%S')}**"]
    
    # Placeholders for the final return tuple
    ret_story_state = current_story_obj
    ret_gallery = current_story_obj.get_all_scenes_for_gallery_display()
    ret_latest_image = create_placeholder_image("🎨 Conjuring visuals...") # Initial placeholder for image component
    ret_latest_narrative_md_obj = gr.Markdown(value=" Musing narrative...")
    ret_status_bar_html_obj = gr.HTML(value=f"<p class='processing_text status_text'>🌌 Weaving Scene {current_story_obj.current_scene_number + 1}...</p>")
    # Log is built up

    # Initial yield for UI updates handled by the .then() chain for buttons
    # This first yield is for immediate feedback on other components
    yield {
        output_status_bar: ret_status_bar_html_obj,
        output_latest_scene_image: gr.Image(value=ret_latest_image), # Show placeholder
        output_latest_scene_narrative: ret_latest_narrative_md_obj,
        output_interaction_log_markdown: gr.Markdown(value="\n".join(log_accumulator))
    }

    try:
        if not scene_prompt_text.strip():
            raise ValueError("Scene prompt cannot be empty!")

        # --- 1. Generate Narrative Text ---
        progress(0.1, desc="✍️ Crafting narrative...")
        narrative_text_generated = f"Narrative Error: Init failed."
        text_model_info = TEXT_MODELS.get(text_model_key)
        if text_model_info and text_model_info["type"] != "none":
            system_p = get_narrative_system_prompt("default")
            prev_narrative = current_story_obj.get_last_scene_narrative()
            user_p = format_narrative_user_prompt(scene_prompt_text, prev_narrative)
            log_accumulator.append(f"  Narrative: Using {text_model_key} ({text_model_info['id']}). Length: {narrative_length}")
            text_response = None
            if text_model_info["type"] == "gemini": text_response = generate_text_gemini(user_p, model_id=text_model_info["id"], system_prompt=system_p, max_tokens=768 if narrative_length.startswith("Detailed") else 400)
            elif text_model_info["type"] == "hf_text": text_response = generate_text_hf(user_p, model_id=text_model_info["id"], system_prompt=system_p, max_tokens=768 if narrative_length.startswith("Detailed") else 400)
            
            if text_response and text_response.success:
                narrative_text_generated = basic_text_cleanup(text_response.text)
                log_accumulator.append(f"  Narrative: Success. (Snippet: {narrative_text_generated[:50]}...)")
            elif text_response:
                narrative_text_generated = f"**Narrative Error ({text_model_key}):** {text_response.error}"
                log_accumulator.append(f"  Narrative: FAILED - {text_response.error}")
            else:
                 log_accumulator.append(f"  Narrative: FAILED - No response object from {text_model_key}.")
        else:
            narrative_text_generated = "**Narrative Error:** Selected text model not available or misconfigured."
            log_accumulator.append(f"  Narrative: FAILED - Model '{text_model_key}' not available.")
        
        ret_latest_narrative_str_content = f"## Scene Idea: {scene_prompt_text}\n\n{narrative_text_generated}"
        ret_latest_narrative_md_obj = gr.Markdown(value=ret_latest_narrative_str_content)
        yield { output_latest_scene_narrative: ret_latest_narrative_md_obj,
                output_interaction_log_markdown: gr.Markdown(value="\n".join(log_accumulator)) }

        # --- 2. Generate Image ---
        progress(0.5, desc="🎨 Conjuring visuals...")
        image_generated_pil = None
        image_generation_error_message = None
        selected_image_provider_type = IMAGE_PROVIDERS.get(image_provider_key)
        image_content_prompt_for_gen = narrative_text_generated if narrative_text_generated and "Error" not in narrative_text_generated else scene_prompt_text
        quality_keyword = "ultra detailed, intricate, masterpiece, " if image_quality == "High Detail" else ("concept sketch, line art, " if image_quality == "Sketch Concept" else "")
        full_image_prompt = format_image_generation_prompt(quality_keyword + image_content_prompt_for_gen[:350], image_style_dropdown, artist_style_text)
        log_accumulator.append(f"  Image: Using {image_provider_key}. Style: {image_style_dropdown}. Artist: {artist_style_text or 'N/A'}.")

        if selected_image_provider_type and selected_image_provider_type != "none":
            image_response = None
            if selected_image_provider_type == "stability_ai": image_response = generate_image_stabilityai(full_image_prompt, negative_prompt=negative_prompt_text or COMMON_NEGATIVE_PROMPTS, steps=40 if image_quality=="High Detail" else 25)
            elif selected_image_provider_type == "dalle": image_response = generate_image_dalle(full_image_prompt, quality="hd" if image_quality=="High Detail" else "standard")
            elif selected_image_provider_type == "hf_image_sdxl_base": image_response = generate_image_hf_model(full_image_prompt, model_id="stabilityai/stable-diffusion-xl-base-1.0", negative_prompt=negative_prompt_text or COMMON_NEGATIVE_PROMPTS)
            elif selected_image_provider_type == "hf_image_openjourney": image_response = generate_image_hf_model(full_image_prompt, model_id="prompthero/openjourney", negative_prompt=negative_prompt_text or COMMON_NEGATIVE_PROMPTS, width=512, height=512)
            
            if image_response and image_response.success:
                image_generated_pil = image_response.image
                log_accumulator.append(f"  Image: Success from {image_response.provider}.")
            elif image_response:
                image_generation_error_message = f"**Image Error ({image_response.provider}):** {image_response.error}"
                log_accumulator.append(f"  Image: FAILED - {image_response.error}")
            else:
                image_generation_error_message = f"**Image Error:** No response object from {image_provider_key} service."
                log_accumulator.append(f"  Image: FAILED - No response object from {image_provider_key}.")
        else:
            image_generation_error_message = "**Image Error:** Selected image provider not available or misconfigured."
            log_accumulator.append(f"  Image: FAILED - Provider '{image_provider_key}' unavailable.")

        ret_latest_image = image_generated_pil if image_generated_pil else create_placeholder_image("Image Gen Failed", color="#401010")
        yield { output_latest_scene_image: gr.Image(value=ret_latest_image),
                output_interaction_log_markdown: gr.Markdown(value="\n".join(log_accumulator)) }

        # --- 3. Add Scene to Story Object ---
        final_scene_error = None
        if image_generation_error_message and "**Narrative Error**" in narrative_text_generated : final_scene_error = f"{narrative_text_generated}\n{image_generation_error_message}"
        elif "**Narrative Error**" in narrative_text_generated: final_scene_error = narrative_text_generated
        elif image_generation_error_message: final_scene_error = image_generation_error_message
        
        current_story_obj.add_scene_from_elements(
            user_prompt=scene_prompt_text,
            narrative_text=narrative_text_generated if "**Narrative Error**" not in narrative_text_generated else "(Narrative gen failed)",
            image=image_generated_pil,
            image_style_prompt=f"{image_style_dropdown}{f', by {artist_style_text}' if artist_style_text and artist_style_text.strip() else ''}",
            image_provider=image_provider_key if selected_image_provider_type != "none" else "N/A",
            error_message=final_scene_error
        )
        ret_story_state = current_story_obj 
        log_accumulator.append(f"  Scene {current_story_obj.current_scene_number} processed and added.")
        
        # --- 4. Prepare Final Values for Return Tuple ---
        ret_gallery = current_story_obj.get_all_scenes_for_gallery_display()
        _ , latest_narr_for_display_final_str_temp = current_story_obj.get_latest_scene_details_for_display()
        ret_latest_narrative_md_obj = gr.Markdown(value=latest_narr_for_display_final_str_temp)
        
        status_html_str_temp = f"<p class='error_text status_text'>Scene {current_story_obj.current_scene_number} added with errors.</p>" if final_scene_error else f"<p class='success_text status_text'>🌌 Scene {current_story_obj.current_scene_number} woven!</p>"
        ret_status_bar_html_obj = gr.HTML(value=status_html_str_temp)
        
        progress(1.0, desc="Scene Complete!")

    except ValueError as ve:
        log_accumulator.append(f"\n**INPUT/CONFIG ERROR:** {ve}")
        ret_status_bar_html_obj = gr.HTML(value=f"<p class='error_text status_text'>❌ CONFIGURATION ERROR: {ve}</p>")
        ret_latest_narrative_md_obj = gr.Markdown(value=f"## Error\n{ve}")
    except Exception as e:
        log_accumulator.append(f"\n**UNEXPECTED RUNTIME ERROR:** {type(e).__name__} - {e}\n{traceback.format_exc()}")
        ret_status_bar_html_obj = gr.HTML(value=f"<p class='error_text status_text'>❌ UNEXPECTED ERROR: {type(e).__name__}. Check logs.</p>")
        ret_latest_narrative_md_obj = gr.Markdown(value=f"## Unexpected Error\n{type(e).__name__}: {e}\nSee log for details.")
    # `finally` block is removed from here; button re-enabling is handled by .then()

    current_total_time = time.time() - start_time
    log_accumulator.append(f"  Cycle ended at {time.strftime('%H:%M:%S')}. Total time: {current_total_time:.2f}s")
    ret_log_md = gr.Markdown(value="\n".join(log_accumulator))
    
    return (
        ret_story_state, ret_gallery, ret_latest_image, 
        ret_latest_narrative_md_obj, ret_status_bar_html_obj, ret_log_md
    )

def clear_story_state_ui_wrapper():
    new_story = Story()
    placeholder_img = create_placeholder_image("Your StoryVerse is a blank canvas...", color="#1A1A2E", text_color="#A0A0C0")
    cleared_gallery = [(placeholder_img, "Your StoryVerse is new and untold...")]
    initial_narrative = "## ✨ A New Story Begins ✨\nDescribe your first scene idea..."
    status_msg = "<p class='processing_text status_text'>📜 Story Cleared.</p>"
    return (new_story, cleared_gallery, None, gr.Markdown(initial_narrative), gr.HTML(status_msg), "Log Cleared.", "")

def surprise_me_func():
    themes = ["Cosmic Horror", "Solarpunk Utopia", "Mythic Fantasy", "Noir Detective"]; actions = ["unearths an artifact", "negotiates"]; settings = ["on a rogue planet", "in a city in a tree"]; prompt = f"A protagonist {random.choice(actions)} {random.choice(settings)}. Theme: {random.choice(themes)}."; style = random.choice(list(STYLE_PRESETS.keys())); artist = random.choice(["H.R. Giger", "Moebius", ""]*2); return prompt, style, artist

def disable_buttons_for_processing():
    return gr.Button(interactive=False), gr.Button(interactive=False)

def enable_buttons_after_processing():
    return gr.Button(interactive=True), gr.Button(interactive=True)

# --- Gradio UI Definition ---
with gr.Blocks(theme=omega_theme, css=omega_css, title="✨ StoryVerse Omega ✨") as story_weaver_demo:
    # Define Python variables for UI components that will be inputs or outputs
    story_state_output = gr.State(Story()) 
    # Input Column Components
    scene_prompt_input = gr.Textbox()      
    image_style_input = gr.Dropdown()      
    artist_style_input = gr.Textbox()      
    negative_prompt_input = gr.Textbox()   
    text_model_dropdown = gr.Dropdown()    
    image_provider_dropdown = gr.Dropdown()
    narrative_length_dropdown = gr.Dropdown() 
    image_quality_dropdown = gr.Dropdown()    
    # Output Column Components
    output_gallery = gr.Gallery()
    output_latest_scene_image = gr.Image()
    output_latest_scene_narrative = gr.Markdown()
    output_status_bar = gr.HTML()
    output_interaction_log_markdown = gr.Markdown()
    # Button components (updated via chained .then() events)
    engage_button = gr.Button()
    surprise_button = gr.Button()
    clear_story_button = gr.Button()

    # --- Layout the UI ---
    gr.Markdown("<div align='center'><h1>✨ StoryVerse Omega ✨</h1>\n<h3>Craft Immersive Multimodal Worlds with AI</h3></div>")
    gr.HTML("<div class='important-note'><strong>Welcome, Worldsmith!</strong> Describe your vision, choose your style, and let Omega help you weave captivating scenes with narrative and imagery. Ensure API keys (<code>STORYVERSE_...</code>) are correctly set in Space Secrets!</div>")

    with gr.Accordion("🔧 AI Services Status & Info", open=False):
        status_text_list = []; text_llm_ok, image_gen_ok = (GEMINI_TEXT_IS_READY or HF_TEXT_IS_READY), (STABILITY_API_IS_READY or OPENAI_DALLE_IS_READY or HF_IMAGE_IS_READY) # Added HF_IMAGE_IS_READY
        if not text_llm_ok and not image_gen_ok: status_text_list.append("<p style='color:#FCA5A5;font-weight:bold;'>⚠️ CRITICAL: NO AI SERVICES CONFIGURED.</p>")
        else:
            if text_llm_ok: status_text_list.append("<p style='color:#A7F3D0;'>✅ Text Generation Service(s) Ready.</p>")
            else: status_text_list.append("<p style='color:#FCD34D;'>⚠️ Text Generation Service(s) NOT Ready.</p>")
            if image_gen_ok: status_text_list.append("<p style='color:#A7F3D0;'>✅ Image Generation Service(s) Ready.</p>")
            else: status_text_list.append("<p style='color:#FCD34D;'>⚠️ Image Generation Service(s) NOT Ready.</p>")
        gr.HTML("".join(status_text_list))

    with gr.Row(equal_height=False, variant="panel"):
        with gr.Column(scale=7, min_width=450): 
            gr.Markdown("### 💡 **Craft Your Scene**", elem_classes="input-section-header")
            with gr.Group():
                scene_prompt_input = gr.Textbox(lines=7, label="Scene Vision (Description, Dialogue, Action):", placeholder="e.g., Amidst swirling cosmic dust...")
            with gr.Row(elem_classes=["compact-row"]):
                with gr.Column(scale=2):
                    image_style_input = gr.Dropdown(choices=["Default (Cinematic Realism)"] + sorted(list(STYLE_PRESETS.keys())), value="Default (Cinematic Realism)", label="Visual Style Preset", allow_custom_value=True) # allow_custom_value for examples
                with gr.Column(scale=2):
                    artist_style_input = gr.Textbox(label="Artistic Inspiration (Optional):", placeholder="e.g., Moebius...")
            negative_prompt_input = gr.Textbox(lines=2, label="Exclude from Image (Negative Prompt):", value=COMMON_NEGATIVE_PROMPTS)
            with gr.Accordion("⚙️ Advanced AI Configuration", open=False):
                 with gr.Group():
                    text_model_dropdown = gr.Dropdown(choices=list(TEXT_MODELS.keys()), value=UI_DEFAULT_TEXT_MODEL_KEY, label="Narrative AI Engine")
                    image_provider_dropdown = gr.Dropdown(choices=list(IMAGE_PROVIDERS.keys()), value=UI_DEFAULT_IMAGE_PROVIDER_KEY, label="Visual AI Engine")
                    with gr.Row():
                        narrative_length_dropdown = gr.Dropdown(["Short (1 paragraph)", "Medium (2-3 paragraphs)", "Detailed (4+ paragraphs)"], value="Medium (2-3 paragraphs)", label="Narrative Detail")
                        image_quality_dropdown = gr.Dropdown(["Standard", "High Detail", "Sketch Concept"], value="Standard", label="Image Detail/Style")
            with gr.Row(elem_classes=["compact-row"], equal_height=True):
                engage_button = gr.Button("🌌 Weave This Scene!", variant="primary", scale=3, icon="✨")
                surprise_button = gr.Button("🎲 Surprise Me!", variant="secondary", scale=1, icon="🎁")
                clear_story_button = gr.Button("🗑️ New Story", variant="stop", scale=1, icon="♻️")
            output_status_bar = gr.HTML(value="<p class='processing_text status_text'>Ready to weave your first masterpiece!</p>")

        with gr.Column(scale=10, min_width=700): 
            gr.Markdown("### 🖼️ **Your Evolving StoryVerse**", elem_classes="output-section-header")
            with gr.Tabs():
                with gr.TabItem("🌠 Latest Scene", id="latest_scene_tab"):
                    output_latest_scene_image = gr.Image(label="Latest Scene Image", type="pil", interactive=False, show_download_button=True, height=512, show_label=False, elem_classes=["panel_image"])
                    output_latest_scene_narrative = gr.Markdown() 
                with gr.TabItem("📚 Story Scroll", id="story_scroll_tab"):
                    output_gallery = gr.Gallery(label="Story Scroll", show_label=False, columns=4, object_fit="cover", height=700, preview=True, allow_preview=True, elem_classes=["gallery_output"])
                with gr.TabItem("⚙️ Interaction Log", id="log_tab"):
                    with gr.Accordion(label="Developer Interaction Log", open=False): 
                        output_interaction_log_markdown = gr.Markdown("Log will appear here...")

    # Chained event handling for engage_button
    engage_button.click(
        fn=disable_buttons_for_processing,
        inputs=None,
        outputs=[engage_button, surprise_button],
        queue=False 
    ).then(
        fn=add_scene_to_story_orchestrator,
        inputs=[
            story_state_output, scene_prompt_input, 
            image_style_input, artist_style_input, negative_prompt_input,
            text_model_dropdown, image_provider_dropdown,
            narrative_length_dropdown, image_quality_dropdown
        ],
        outputs=[ 
            story_state_output, output_gallery, output_latest_scene_image, 
            output_latest_scene_narrative, output_status_bar, output_interaction_log_markdown
        ]
    ).then( 
        fn=enable_buttons_after_processing,
        inputs=None,
        outputs=[engage_button, surprise_button],
        queue=False 
    )
    
    clear_story_button.click(
        fn=clear_story_state_ui_wrapper,
        inputs=[],
        outputs=[ 
            story_state_output, output_gallery, output_latest_scene_image, 
            output_latest_scene_narrative, output_status_bar, output_interaction_log_markdown,
            scene_prompt_input 
        ]
    )
    surprise_button.click(
        fn=surprise_me_func,
        inputs=[],
        outputs=[scene_prompt_input, image_style_input, artist_style_input]
    )
    gr.Examples(
        examples=[ # Ensure these styles are in your STYLE_PRESETS in image_style_prompts.py
            ["A lone, weary traveler on a mechanical steed crosses a vast, crimson desert under twin suns. Dust devils dance in the distance.", "Sci-Fi Western", "Moebius", "greenery, water, modern city"],
            ["Deep within an ancient, bioluminescent forest, a hidden civilization of sentient fungi perform a mystical ritual around a pulsating crystal.", "Psychedelic Fantasy", "Alex Grey", "technology, buildings, roads"],
            ["A child sits on a crescent moon, fishing for stars in a swirling nebula. A friendly space whale swims nearby.", "Whimsical Cosmic", "James Jean", "realistic, dark, scary"],
            ["A grand, baroque library where the books fly freely and whisper forgotten lore to those who listen closely.", "Magical Realism", "Remedios Varo", "minimalist, simple, technology"]
        ],
        inputs=[scene_prompt_input, image_style_input, artist_style_input, negative_prompt_input], 
        label="🌌 Example Universes to Weave 🌌",
    )
    gr.HTML("<div style='text-align:center; margin-top:30px; padding-bottom:20px;'><p style='font-size:0.9em; color:#8080A0;'>✨ StoryVerse Omega™ - Weaving Worlds with Words and Pixels ✨</p></div>")

# --- Entry Point ---
if __name__ == "__main__":
    print("="*80); print("✨ StoryVerse Omega™ Launching... ✨")
    print(f"  Gemini Text Ready: {GEMINI_TEXT_IS_READY}"); print(f"  HF Text Ready: {HF_TEXT_IS_READY}")
    print(f"  Stability AI Ready: {STABILITY_API_IS_READY}"); print(f"  DALL-E Ready: {OPENAI_DALLE_IS_READY}"); print(f"  HF Image Ready: {HF_IMAGE_IS_READY}")
    if not (GEMINI_TEXT_IS_READY or HF_TEXT_IS_READY) or not (STABILITY_API_IS_READY or OPENAI_DALLE_IS_READY or HF_IMAGE_IS_READY): print("  🔴 WARNING: Not all services configured.")
    print(f"  Default Text Model: {UI_DEFAULT_TEXT_MODEL_KEY}"); print(f"  Default Image Provider: {UI_DEFAULT_IMAGE_PROVIDER_KEY}")
    print("="*80)
    story_weaver_demo.launch(debug=True, server_name="0.0.0.0", share=False)