app.py

# app.py
import streamlit as st
from core.gemini_handler import GeminiHandler
from core.visual_engine import VisualEngine
from core.prompt_engineering import (
    create_cinematic_treatment_prompt,
    construct_dalle_prompt,
    construct_text_to_video_prompt_for_gen4,
    create_narration_script_prompt_enhanced,
    create_scene_regeneration_prompt,
    create_visual_regeneration_prompt
)
import os
import logging

# --- Mitigate Streamlit PermissionError on Hugging Face Spaces ---
# Streamlit tries to write to ~/.streamlit or /.streamlit.
# By setting global. τότεSIMIT_CONFIG_DIR or specific telemetry flags,
# we can sometimes avoid this. A common fix is to disable telemetry.
# However, the error specifically mentions '/.streamlit', which is root.
# Setting STREAMLIT_HOME in Dockerfile is a more robust fix for this specific path.
# If that's not enough, disabling usage stats collection is a good fallback.
if "STREAMLIT_CLIENT_GATHER_USAGE_STATS" not in os.environ:
    os.environ["STREAMLIT_CLIENT_GATHER_USAGE_STATS"] = "false"
# Also, ensure Streamlit doesn't try to create a global config dir if HOME is weird
if "STREAMLIT_HOME" not in os.environ and os.getcwd().startswith("/app"): # Common for HF
    os.environ["STREAMLIT_HOME"] = "/app/.streamlit_config" # Use a writable path within the app dir

# --- Configuration & Initialization ---
st.set_page_config(page_title="CineGen AI Ultra+", layout="wide", initial_sidebar_state="expanded")
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
logger = logging.getLogger(__name__)

# --- Global Definitions ---
SHOT_TYPES_OPTIONS = [ "Director's Choice", "Establishing Shot", "Long Shot", "Full Shot", "Medium Long Shot (Cowboy)", "Medium Shot", "Medium Close-up", "Close-up", "Extreme Close-up", "Point of View (POV)", "Over the Shoulder", "Tracking Shot", "Dolly Zoom", "Crane Shot", "Aerial Shot", "Static Shot", "Dutch Angle", "Whip Pan"]
DEFAULT_SCENE_DURATION_SECS = 5
DEFAULT_SHOT_TYPE = "Director's Choice"
ASSET_TYPE_OPTIONS = ["Auto (Director's Choice)", "Image", "Video Clip"]

def load_api_key(key_name_streamlit, key_name_env, service_name):
    key = None; secrets_available = hasattr(st, 'secrets')
    try:
        if secrets_available and key_name_streamlit in st.secrets:
            key = st.secrets[key_name_streamlit]
            if key: logger.info(f"{service_name} API Key found in Streamlit secrets.")
    except Exception as e: logger.warning(f"Could not access st.secrets for {key_name_streamlit}: {e}")
    if not key and key_name_env in os.environ:
        key = os.environ[key_name_env]
        if key: logger.info(f"{service_name} API Key found in environment variable.")
    if not key: logger.warning(f"{service_name} API Key NOT FOUND for {service_name}. Related features may be disabled or use fallbacks.")
    return key

if 'services_initialized' not in st.session_state:
    logger.info("Initializing services and API keys for the first time this session...")
    st.session_state.GEMINI_API_KEY = load_api_key("GEMINI_API_KEY", "GEMINI_API_KEY", "Gemini")
    st.session_state.OPENAI_API_KEY = load_api_key("OPENAI_API_KEY", "OPENAI_API_KEY", "OpenAI/DALL-E")
    st.session_state.ELEVENLABS_API_KEY = load_api_key("ELEVENLABS_API_KEY", "ELEVENLABS_API_KEY", "ElevenLabs")
    st.session_state.PEXELS_API_KEY = load_api_key("PEXELS_API_KEY", "PEXELS_API_KEY", "Pexels")
    st.session_state.ELEVENLABS_VOICE_ID_CONFIG = load_api_key("ELEVENLABS_VOICE_ID", "ELEVENLABS_VOICE_ID", "ElevenLabs Voice ID")
    st.session_state.RUNWAY_API_KEY = load_api_key("RUNWAY_API_KEY", "RUNWAY_API_KEY", "RunwayML")

    if not st.session_state.GEMINI_API_KEY: st.error("CRITICAL: Gemini API Key missing!"); logger.critical("Gemini API Key missing."); st.stop()
    try: st.session_state.gemini_handler = GeminiHandler(api_key=st.session_state.GEMINI_API_KEY); logger.info("GeminiHandler initialized.")
    except Exception as e: st.error(f"Failed to init GeminiHandler: {e}"); logger.critical(f"GeminiHandler init failed: {e}", exc_info=True); st.stop()
    try:
        default_voice_id_el = "Rachel"; configured_voice_id_el = st.session_state.ELEVENLABS_VOICE_ID_CONFIG or default_voice_id_el
        st.session_state.visual_engine = VisualEngine(output_dir="temp_cinegen_media", default_elevenlabs_voice_id=configured_voice_id_el)
        st.session_state.visual_engine.set_openai_api_key(st.session_state.OPENAI_API_KEY)
        st.session_state.visual_engine.set_elevenlabs_api_key(st.session_state.ELEVENLABS_API_KEY, voice_id_from_secret=st.session_state.ELEVENLABS_VOICE_ID_CONFIG)
        st.session_state.visual_engine.set_pexels_api_key(st.session_state.PEXELS_API_KEY)
        st.session_state.visual_engine.set_runway_api_key(st.session_state.RUNWAY_API_KEY)
        logger.info("VisualEngine initialized and API keys set.")
    except Exception as e: st.error(f"Failed to init VisualEngine: {e}"); logger.critical(f"VisualEngine init/key setting failed: {e}", exc_info=True); st.warning("VisualEngine critical setup issue.")
    st.session_state.services_initialized = True; logger.info("Service initialization complete.")

for key_ss, default_val_ss in [ ('story_treatment_scenes', []), ('scene_generation_prompts', []), ('generated_scene_assets_info', []), ('video_path', None), ('character_definitions', {}), ('global_style_additions', ""), ('overall_narration_audio_path', None), ('narration_script_display', "")]:
    if key_ss not in st.session_state: st.session_state[key_ss] = default_val_ss

def initialize_new_project_state():
    st.session_state.story_treatment_scenes = []; st.session_state.scene_generation_prompts = []; st.session_state.generated_scene_assets_info = []
    st.session_state.video_path, st.session_state.overall_narration_audio_path, st.session_state.narration_script_display = None, None, ""
    logger.info("New project state initialized.")

def generate_asset_for_scene_wrapper(scene_idx, scene_data_item_for_asset, version_num=1, user_selected_asset_type_override="Auto (Director's Choice)"): # Renamed scene_data
    generate_as_video_clip_final = False
    gemini_suggested_asset_type = scene_data_item_for_asset.get('suggested_asset_type_감독', 'image').lower()
    if user_selected_asset_type_override == "Image": generate_as_video_clip_final = False
    elif user_selected_asset_type_override == "Video Clip": generate_as_video_clip_final = True
    elif user_selected_asset_type_override == "Auto (Director's Choice)": generate_as_video_clip_final = (gemini_suggested_asset_type == "video_clip")
    
    image_gen_prompt_text = construct_dalle_prompt(scene_data_item_for_asset, st.session_state.character_definitions, st.session_state.global_style_additions)
    motion_gen_prompt_text = ""
    if generate_as_video_clip_final:
        motion_gen_prompt_text = construct_text_to_video_prompt_for_gen4(scene_data_item_for_asset, st.session_state.global_style_additions)
        if not motion_gen_prompt_text: motion_gen_prompt_text = scene_data_item_for_asset.get('video_clip_motion_description_감독', "subtle ambient motion"); logger.warning(f"S{scene_data_item_for_asset.get('scene_number', scene_idx+1)}: Empty motion prompt, using default.")

    if not image_gen_prompt_text: logger.error(f"Base image prompt construction failed for S{scene_data_item_for_asset.get('scene_number', scene_idx+1)}"); return False
    while len(st.session_state.scene_generation_prompts) <= scene_idx: st.session_state.scene_generation_prompts.append("")
    while len(st.session_state.generated_scene_assets_info) <= scene_idx: st.session_state.generated_scene_assets_info.append(None)
    st.session_state.scene_generation_prompts[scene_idx] = motion_gen_prompt_text if generate_as_video_clip_final else image_gen_prompt_text
    
    filename_base_for_asset = f"scene_{scene_data_item_for_asset.get('scene_number', scene_idx+1)}_asset_v{version_num}"
    runway_dur_for_scene = scene_data_item_for_asset.get('video_clip_duration_estimate_secs_감독', scene_data_item_for_asset.get('user_scene_duration_secs', DEFAULT_SCENE_DURATION_SECS))
    if runway_dur_for_scene <= 0 : runway_dur_for_scene = DEFAULT_SCENE_DURATION_SECS

    asset_result_dict = st.session_state.visual_engine.generate_scene_asset(
        image_generation_prompt_text=image_gen_prompt_text,
        motion_prompt_text_for_video=motion_gen_prompt_text,
        scene_data_dict=scene_data_item_for_asset,  # <<< CHANGED 'scene_data' TO 'scene_data_dict'
        scene_identifier_fn_base=filename_base_for_asset,
        generate_as_video_clip_flag=generate_as_video_clip_final, # Renamed for clarity
        runway_target_dur_val=runway_dur_for_scene # Renamed for clarity
    )
    st.session_state.generated_scene_assets_info[scene_idx] = asset_result_dict
    if asset_result_dict and asset_result_dict.get('prompt_used'): st.session_state.scene_generation_prompts[scene_idx] = asset_result_dict['prompt_used']

    if asset_result_dict and not asset_result_dict['error'] and asset_result_dict.get('path') and os.path.exists(asset_result_dict['path']):
        logger.info(f"Asset ({asset_result_dict.get('type')}) generated for S{scene_data_item_for_asset.get('scene_number', scene_idx+1)}: {os.path.basename(asset_result_dict['path'])}")
        return True
    else:
        err_msg_asset = asset_result_dict.get('error_message', 'Unknown error') if asset_result_dict else 'Asset result is None'
        logger.warning(f"Asset gen FAILED for S{scene_data_item_for_asset.get('scene_number', scene_idx+1)}. Type: {'Video' if generate_as_video_clip_final else 'Image'}. Err: {err_msg_asset}")
        if not st.session_state.generated_scene_assets_info[scene_idx] or not st.session_state.generated_scene_assets_info[scene_idx]['error']:
             st.session_state.generated_scene_assets_info[scene_idx] = {'path': None, 'type': 'none', 'error': True, 'error_message': err_msg_asset, 'prompt_used': st.session_state.scene_generation_prompts[scene_idx]}
        return False

# --- UI Sidebar ---
with st.sidebar:
    st.title("🎬 CineGen AI Ultra+")
    st.markdown("### Creative Seed")
    user_idea_input = st.text_area("Core Story Idea / Theme:", "A lone wanderer searches for a mythical oasis in a vast, post-apocalyptic desert, haunted by mirages and mechanical scavengers.", height=120, key="user_idea_main_v5_sb_unique")
    genre_selection = st.selectbox("Primary Genre:", ["Cyberpunk", "Sci-Fi", "Fantasy", "Noir", "Thriller", "Western", "Post-Apocalyptic", "Historical Drama", "Surreal"], index=6, key="genre_main_v5_sb_unique")
    mood_selection = st.selectbox("Overall Mood:", ["Hopeful yet Desperate", "Mysterious & Eerie", "Gritty & Tense", "Epic & Awe-Inspiring", "Melancholy & Reflective", "Whimsical & Lighthearted"], index=0, key="mood_main_v5_sb_unique")
    num_scenes_slider = st.slider("Number of Key Scenes:", 1, 10, 1, key="num_scenes_main_v5_sb_unique") # Default to 1 for faster testing
    creative_guidance_options_map = {"Standard Director": "standard", "Artistic Visionary": "more_artistic", "Experimental Storyteller": "experimental_narrative"}
    selected_creative_guidance_key_sb = st.selectbox("AI Creative Director Style:", options=list(creative_guidance_options_map.keys()), key="creative_guidance_select_v5_sb_unique")
    actual_creative_guidance_val = creative_guidance_options_map[selected_creative_guidance_key_sb]

    if st.button("🌌 Generate Cinematic Treatment", type="primary", key="generate_treatment_btn_v5_sb_unique", use_container_width=True):
        initialize_new_project_state()
        if not user_idea_input.strip(): st.warning("Please provide a story idea.")
        else:
            with st.status("AI Director is envisioning your masterpiece...", expanded=True) as status_op_main:
                try:
                    status_op_main.write("Phase 1: Gemini crafting cinematic treatment... 📜"); logger.info("Phase 1: Cinematic Treatment Gen.")
                    treatment_gen_prompt_gemini = create_cinematic_treatment_prompt(user_idea_input, genre_selection, mood_selection, num_scenes_slider, actual_creative_guidance_val)
                    raw_treatment_result_list = st.session_state.gemini_handler.generate_story_breakdown(treatment_gen_prompt_gemini)
                    if not isinstance(raw_treatment_result_list, list) or not raw_treatment_result_list: raise ValueError("Gemini returned invalid scene list format.")
                    processed_scene_list_init = []
                    for scene_from_gemini_init in raw_treatment_result_list:
                        scene_from_gemini_init['user_shot_type'] = scene_from_gemini_init.get('PROACTIVE_camera_work_감독', DEFAULT_SHOT_TYPE)
                        gemini_dur_est_init = scene_from_gemini_init.get('video_clip_duration_estimate_secs_감독', 0)
                        scene_from_gemini_init['user_scene_duration_secs'] = gemini_dur_est_init if gemini_dur_est_init > 0 else DEFAULT_SCENE_DURATION_SECS
                        scene_from_gemini_init['user_selected_asset_type'] = "Auto (Director's Choice)"
                        processed_scene_list_init.append(scene_from_gemini_init)
                    st.session_state.story_treatment_scenes = processed_scene_list_init
                    num_generated_scenes_val = len(st.session_state.story_treatment_scenes)
                    st.session_state.scene_generation_prompts = [""]*num_generated_scenes_val; st.session_state.generated_scene_assets_info = [None]*num_generated_scenes_val
                    logger.info(f"Phase 1 complete. {num_generated_scenes_val} scenes."); status_op_main.update(label="Treatment complete! ✅ Generating visuals...", state="running")

                    status_op_main.write("Phase 2: Creating visual assets (Image/Video)... 🖼️🎬"); logger.info("Phase 2: Visual Asset Gen.")
                    successful_asset_count_val = 0
                    for i_scene_init, scene_data_item_init in enumerate(st.session_state.story_treatment_scenes):
                        scene_num_display_init = scene_data_item_init.get('scene_number', i_scene_init+1)
                        status_op_main.write(f"  Asset for Scene {scene_num_display_init}..."); logger.info(f"  Processing asset for Scene {scene_num_display_init}.")
                        if generate_asset_for_scene_wrapper(i_scene_init, scene_data_item_init, version_num=1): successful_asset_count_val += 1
                        
                    status_label_phase2_val = "Visual assets ready! "; next_op_state_val = "running"
                    if successful_asset_count_val == 0 and num_generated_scenes_val > 0:
                        logger.error("Asset gen failed for all scenes."); status_label_phase2_val = "Asset gen FAILED for all scenes."; next_op_state_val="error";
                        status_op_main.update(label=status_label_phase2_val, state=next_op_state_val, expanded=True); st.stop()
                    elif successful_asset_count_val < num_generated_scenes_val: logger.warning(f"Assets partially generated ({successful_asset_count_val}/{num_generated_scenes_val})."); status_label_phase2_val = f"Assets partially generated ({successful_asset_count_val}/{num_generated_scenes_val}). "
                    status_op_main.update(label=f"{status_label_phase2_val}Generating narration script...", state=next_op_state_val)
                    if next_op_state_val == "error": st.stop()

                    status_op_main.write("Phase 3: Generating narration script..."); logger.info("Phase 3: Narration Script Gen.")
                    voice_style_for_narration_prompt_val = st.session_state.get("selected_voice_style_for_generation", "cinematic_trailer")
                    narration_gen_prompt_val = create_narration_script_prompt_enhanced(st.session_state.story_treatment_scenes, mood_selection, genre_selection, voice_style_for_narration_prompt_val)
                    st.session_state.narration_script_display = st.session_state.gemini_handler.generate_image_prompt(narration_gen_prompt_val)
                    logger.info("Narration script generated."); status_op_main.update(label="Narration script ready! Synthesizing voice...", state="running")
                    status_op_main.write("Phase 4: Synthesizing voice (ElevenLabs)... 🔊"); logger.info("Phase 4: Voice Synthesis.")
                    st.session_state.overall_narration_audio_path = st.session_state.visual_engine.generate_narration_audio(st.session_state.narration_script_display)
                    final_status_label_val = "All components ready! Storyboard below. 🚀"; final_op_state_val = "complete"
                    if not st.session_state.overall_narration_audio_path: final_status_label_val = f"{status_label_phase2_val}Storyboard ready (Voiceover skipped or failed)."; logger.warning("Voiceover generation skipped/failed.")
                    else: logger.info("Voiceover generated successfully.")
                    status_op_main.update(label=final_status_label_val, state=final_op_state_val, expanded=False)
                except ValueError as ve_err_main: logger.error(f"ValueError in main gen: {ve_err_main}", exc_info=True); status_op_main.update(label=f"Input/Gemini response error: {ve_err_main}", state="error", expanded=True);
                except Exception as e_unhandled_main: logger.error(f"Unhandled Exception in main gen: {e_unhandled_main}", exc_info=True); status_op_main.update(label=f"Unexpected error: {e_unhandled_main}", state="error", expanded=True);
    
    with st.expander("Define Characters", expanded=False):
        # ... (Keep as before)
        char_name_input_sidebar = st.text_input("Character Name", key="char_name_sidebar_unique"); char_desc_input_sidebar = st.text_area("Visual Description", key="char_desc_sidebar_unique", height=100)
        if st.button("Save Character", key="add_char_sidebar_unique"):
            if char_name_input_sidebar and char_desc_input_sidebar: st.session_state.character_definitions[char_name_input_sidebar.strip().lower()] = char_desc_input_sidebar.strip(); st.success(f"Char '{char_name_input_sidebar.strip()}' saved.")
            else: st.warning("Name and description needed.")
        if st.session_state.character_definitions: st.caption("Current Characters:"); [st.markdown(f"**{k.title()}:** _{v}_") for k,v in st.session_state.character_definitions.items()]
    with st.expander("Global Style Overrides", expanded=False):
        # ... (Keep as before)
        style_presets_dict_sidebar = { "Default (Director's Choice)": "", "Hyper-Realistic Gritty Noir": "hyper-realistic gritty neo-noir...", "Surreal Dreamscape Fantasy": "surreal dreamscape...", "Vintage Analog Sci-Fi": "70s/80s analog sci-fi..."}
        selected_style_key_sidebar = st.selectbox("Base Style Preset:", options=list(style_presets_dict_sidebar.keys()), key="style_preset_sidebar_unique")
        custom_kw_input_sidebar = st.text_area("Additional Custom Style Keywords:", key="custom_style_sidebar_unique", height=80)
        current_global_style_val_sidebar = st.session_state.global_style_additions
        if st.button("Apply Global Styles", key="apply_styles_sidebar_unique"):
            final_style_str_sidebar = style_presets_dict_sidebar[selected_style_key_sidebar]; 
            if custom_kw_input_sidebar.strip(): final_style_str_sidebar = f"{final_style_str_sidebar}, {custom_kw_input_sidebar.strip()}" if final_style_str_sidebar else custom_kw_input_sidebar.strip()
            st.session_state.global_style_additions = final_style_str_sidebar.strip(); current_global_style_val_sidebar = final_style_str_sidebar.strip()
            if current_global_style_val_sidebar: st.success("Global styles applied!")
            else: st.info("Global style additions cleared.")
        if current_global_style_val_sidebar: st.caption(f"Active: \"{current_global_style_val_sidebar}\"")
    with st.expander("Voice & Narration Style", expanded=False):
        # ... (Keep as before)
        engine_default_voice_val = "Rachel"
        if hasattr(st.session_state, 'visual_engine') and st.session_state.visual_engine: engine_default_voice_val = st.session_state.visual_engine.elevenlabs_voice_id
        user_voice_id_override_input = st.text_input("ElevenLabs Voice ID (override):", value=engine_default_voice_val, key="el_voice_id_sidebar_unique")
        narration_styles_map_sidebar = {"Cinematic Trailer": "cinematic_trailer", "Neutral Documentary": "documentary_neutral", "Character Introspection": "introspective_character"}
        selected_narration_style_key_sidebar = st.selectbox("Narration Script Style:", list(narration_styles_map_sidebar.keys()), key="narr_style_sidebar_unique", index=0)
        if st.button("Set Narrator Voice & Style", key="set_voice_btn_sidebar_unique"):
            final_voice_id_el_sidebar = user_voice_id_override_input.strip() or st.session_state.get("ELEVENLABS_VOICE_ID_CONFIG", "Rachel")
            if hasattr(st.session_state, 'visual_engine'): st.session_state.visual_engine.elevenlabs_voice_id = final_voice_id_el_sidebar
            st.session_state.selected_voice_style_for_generation = narration_styles_map_sidebar[selected_narration_style_key_sidebar]
            st.success(f"Narrator Voice ID: {final_voice_id_el_sidebar}. Script Style: {selected_narration_style_key_sidebar}")
            logger.info(f"User updated 11L Voice ID: {final_voice_id_el_sidebar}, Script Style: {selected_narration_style_key_sidebar}")

# --- Main Content Area ---
st.header("🎬 Cinematic Storyboard & Treatment")
if st.session_state.narration_script_display:
    with st.expander("📜 View Full Narration Script", expanded=False): st.markdown(f"> _{st.session_state.narration_script_display}_")

if not st.session_state.story_treatment_scenes: st.info("Use the sidebar to generate your cinematic treatment.")
else:
    for i_main_loop_content, scene_content_item_display in enumerate(st.session_state.story_treatment_scenes): # Renamed loop variables
        scene_num_display_val = scene_content_item_display.get('scene_number', i_main_loop_content + 1)
        scene_title_display_val = scene_content_item_display.get('scene_title', 'Untitled Scene')
        key_base_for_widgets_main = f"s{scene_num_display_val}_{''.join(filter(str.isalnum, scene_title_display_val[:10]))}_main_content_{i_main_loop_content}" # Renamed for uniqueness

        if "director_note" in scene_content_item_display and scene_content_item_display['director_note']: st.info(f"🎬 Director Note S{scene_num_display_val}: {scene_content_item_display['director_note']}")
        st.subheader(f"SCENE {scene_num_display_val}: {scene_title_display_val.upper()}"); col_treatment_main, col_visual_main = st.columns([0.45, 0.55])

        with col_treatment_main:
            with st.expander("📝 Scene Treatment & Controls", expanded=True):
                # (Display textual scene details - as before)
                st.markdown(f"**Beat:** {scene_content_item_display.get('emotional_beat', 'N/A')}"); st.markdown(f"**Setting:** {scene_content_item_display.get('setting_description', 'N/A')}"); st.markdown(f"**Chars:** {', '.join(scene_content_item_display.get('characters_involved', ['N/A']))}"); st.markdown(f"**Focus Moment:** _{scene_content_item_display.get('character_focus_moment', 'N/A')}_"); st.markdown(f"**Plot Beat:** {scene_content_item_display.get('key_plot_beat', 'N/A')}"); st.markdown(f"**Dialogue Hook:** `\"{scene_content_item_display.get('suggested_dialogue_hook', '...')}\"`"); st.markdown("---"); st.markdown(f"**Dir. Visual Style:** _{scene_content_item_display.get('PROACTIVE_visual_style_감독', 'N/A')}_"); st.markdown(f"**Dir. Camera:** _{scene_content_item_display.get('PROACTIVE_camera_work_감독', 'N/A')}_"); st.markdown(f"**Dir. Sound:** _{scene_content_item_display.get('PROACTIVE_sound_design_감독', 'N/A')}_"); st.markdown("---")
                st.markdown("##### Shot, Pacing & Asset Controls")
                # (Shot Type, Scene Duration, Asset Type Override selectboxes - as before)
                current_user_shot_type_widget = st.session_state.story_treatment_scenes[i_main_loop_content].get('user_shot_type', DEFAULT_SHOT_TYPE)
                try: shot_type_idx_widget = SHOT_TYPES_OPTIONS.index(current_user_shot_type_widget)
                except ValueError: shot_type_idx_widget = SHOT_TYPES_OPTIONS.index(DEFAULT_SHOT_TYPE)
                new_user_shot_type_widget = st.selectbox("Dominant Shot Type:", options=SHOT_TYPES_OPTIONS, index=shot_type_idx_widget, key=f"shot_type_widget_{key_base_for_widgets_main}")
                if new_user_shot_type_widget != current_user_shot_type_widget: st.session_state.story_treatment_scenes[i_main_loop_content]['user_shot_type'] = new_user_shot_type_widget
                current_user_duration_widget = st.session_state.story_treatment_scenes[i_main_loop_content].get('user_scene_duration_secs', DEFAULT_SCENE_DURATION_SECS)
                new_user_duration_widget = st.number_input("Scene Duration (seconds):", min_value=1, max_value=300, value=current_user_duration_widget, step=1, key=f"duration_widget_{key_base_for_widgets_main}")
                if new_user_duration_widget != current_user_duration_widget: st.session_state.story_treatment_scenes[i_main_loop_content]['user_scene_duration_secs'] = new_user_duration_widget
                current_user_asset_type_widget = st.session_state.story_treatment_scenes[i_main_loop_content].get('user_selected_asset_type', "Auto (Director's Choice)")
                try: asset_type_idx_widget = ASSET_TYPE_OPTIONS.index(current_user_asset_type_widget)
                except ValueError: asset_type_idx_widget = 0
                new_user_asset_type_widget = st.selectbox("Asset Type Override:", ASSET_TYPE_OPTIONS, index=asset_type_idx_widget, key=f"asset_type_sel_{key_base_for_widgets_main}", help="Choose asset type. 'Auto' uses AI suggestion.")
                if new_user_asset_type_widget != current_user_asset_type_widget: st.session_state.story_treatment_scenes[i_main_loop_content]['user_selected_asset_type'] = new_user_asset_type_widget
                st.markdown("---")
                prompt_for_current_asset_display = st.session_state.scene_generation_prompts[i_main_loop_content] if i_main_loop_content < len(st.session_state.scene_generation_prompts) else None
                if prompt_for_current_asset_display:
                     with st.popover("👁️ View Asset Generation Prompt"): st.markdown(f"**Prompt used:**"); st.code(prompt_for_current_asset_display, language='text')
                pexels_query_display_val = scene_content_item_display.get('pexels_search_query_감독', None)
                if pexels_query_display_val: st.caption(f"Pexels Fallback: `{pexels_query_display_val}`")

        with col_visual_main:
            # (Display logic for different asset types - as before)
            asset_info_for_display = st.session_state.generated_scene_assets_info[i_main_loop_content] if i_main_loop_content < len(st.session_state.generated_scene_assets_info) else None
            if asset_info_for_display and not asset_info_for_display.get('error') and asset_info_for_display.get('path') and os.path.exists(asset_info_for_display['path']):
                path_to_asset_display = asset_info_for_display['path']; type_of_asset_display = asset_info_for_display.get('type', 'image')
                if type_of_asset_display == 'image': st.image(path_to_asset_display, caption=f"S{scene_num_display_val} ({type_of_asset_display}): {scene_title_display_val}")
                elif type_of_asset_display == 'video':
                    try:
                        with open(path_to_asset_display, 'rb') as vf_read_main: video_bytes_content_main = vf_read_main.read()
                        st.video(video_bytes_content_main, format="video/mp4", start_time=0); st.caption(f"S{scene_num_display_val} ({type_of_asset_display}): {scene_title_display_val}")
                    except Exception as e_vid_disp_main: st.error(f"Error displaying video {path_to_asset_display}: {e_vid_disp_main}"); logger.error(f"Error displaying video: {e_vid_disp_main}", exc_info=True)
                else: st.warning(f"Unknown asset type '{type_of_asset_display}' for S{scene_num_display_val}.")
            else:
                if st.session_state.story_treatment_scenes:
                    error_msg_display_main = asset_info_for_display.get('error_message', 'Visual pending/failed.') if asset_info_for_display else 'Visual pending/failed.'
                    st.caption(error_msg_display_main)
            
            with st.popover(f"✏️ Edit S{scene_num_display_val} Treatment"):
                feedback_for_treatment_input = st.text_area("Changes to treatment:", key=f"treat_fb_{key_base_for_widgets_main}", height=150)
                if st.button(f"🔄 Update S{scene_num_display_val} Treatment", key=f"regen_treat_btn_{key_base_for_widgets_main}"):
                    if feedback_for_treatment_input:
                        with st.status(f"Updating S{scene_num_display_val} Treatment & Asset...", expanded=True) as status_treat_regen_main:
                            user_shot_type_pref_treat = st.session_state.story_treatment_scenes[i_main_loop_content]['user_shot_type']
                            user_duration_pref_treat = st.session_state.story_treatment_scenes[i_main_loop_content]['user_scene_duration_secs']
                            user_asset_type_pref_treat = st.session_state.story_treatment_scenes[i_main_loop_content]['user_selected_asset_type']
                            regen_prompt_gemini_treat = create_scene_regeneration_prompt(scene_content_item_display, feedback_for_treatment_input, st.session_state.story_treatment_scenes)
                            try:
                                updated_scene_data_from_gemini_treat = st.session_state.gemini_handler.regenerate_scene_script_details(regen_prompt_gemini_treat)
                                final_updated_scene_data_treat = {**updated_scene_data_from_gemini_treat}
                                final_updated_scene_data_treat['user_shot_type'] = user_shot_type_pref_treat; final_updated_scene_data_treat['user_scene_duration_secs'] = user_duration_pref_treat; final_updated_scene_data_treat['user_selected_asset_type'] = user_asset_type_pref_treat
                                st.session_state.story_treatment_scenes[i_main_loop_content] = final_updated_scene_data_treat
                                status_treat_regen_main.update(label="Treatment updated! Regenerating asset...", state="running")
                                version_num_asset_treat = 1
                                if asset_info_for_display and asset_info_for_display.get('path') and os.path.exists(asset_info_for_display['path']):
                                    try: base_fn_treat,_=os.path.splitext(os.path.basename(asset_info_for_display['path'])); version_num_asset_treat = int(base_fn_treat.split('_v')[-1])+1 if '_v' in base_fn_treat else 2
                                    except: version_num_asset_treat = 2 
                                if generate_asset_for_scene_wrapper(i_main_loop_content, final_updated_scene_data_treat, version_num=version_num_asset_treat, user_selected_asset_type_override=user_asset_type_pref_treat): status_treat_regen_main.update(label="Treatment & Asset Updated! 🎉", state="complete", expanded=False)
                                else: status_treat_regen_main.update(label="Treatment updated, asset failed.", state="complete", expanded=False)
                                st.rerun()
                            except Exception as e_treat_regen_loop: status_treat_regen_main.update(label=f"Error: {e_treat_regen_loop}", state="error"); logger.error(f"Scene treatment regen error: {e_treat_regen_loop}", exc_info=True)
                    else: st.warning("Please provide feedback for treatment.")

            with st.popover(f"🎨 Edit S{scene_num_display_val} Visual Prompt/Asset"):
                current_gen_prompt_edit_display = st.session_state.scene_generation_prompts[i_main_loop_content] if i_main_loop_content < len(st.session_state.scene_generation_prompts) else "No prompt."
                st.caption("Current Asset Generation Prompt:"); st.code(current_gen_prompt_edit_display, language='text')
                feedback_for_visual_input = st.text_area("Describe changes for the visual asset:", key=f"visual_fb_{key_base_for_widgets_main}", height=150)
                if st.button(f"🔄 Update S{scene_num_display_val} Asset", key=f"regen_visual_btn_{key_base_for_widgets_main}"):
                    if feedback_for_visual_input:
                        with st.status(f"Refining prompt & asset for S{scene_num_display_val}...", expanded=True) as status_visual_regen_main:
                            user_asset_type_choice_viz = st.session_state.story_treatment_scenes[i_main_loop_content]['user_selected_asset_type']
                            is_video_type_for_regen = (user_asset_type_choice_viz == "Video Clip") or (user_asset_type_choice_viz == "Auto (Director's Choice)" and scene_content_item_display.get('suggested_asset_type_감독') == 'video_clip')
                            newly_constructed_asset_prompt_regen = ""
                            if not is_video_type_for_regen:
                                gemini_refinement_prompt_viz = create_visual_regeneration_prompt(current_gen_prompt_edit_display, feedback_for_visual_input, scene_content_item_display, st.session_state.character_definitions, st.session_state.global_style_additions)
                                try: newly_constructed_asset_prompt_regen = st.session_state.gemini_handler.refine_image_prompt_from_feedback(gemini_refinement_prompt_viz); st.session_state.scene_generation_prompts[i_main_loop_content] = newly_constructed_asset_prompt_regen; status_visual_regen_main.update(label="Image prompt refined! Regenerating asset...", state="running")
                                except Exception as e_gemini_refine_viz: status_visual_regen_main.update(label=f"Error refining prompt: {e_gemini_refine_viz}", state="error"); logger.error(f"Visual prompt refinement error: {e_gemini_refine_viz}", exc_info=True); continue
                            else: 
                                logger.info(f"Reconstructing video motion prompt for S{scene_num_display_val}. Feedback (indirect): {feedback_for_visual_input}")
                                newly_constructed_asset_prompt_regen = construct_text_to_video_prompt_for_gen4(scene_content_item_display, st.session_state.global_style_additions); st.session_state.scene_generation_prompts[i_main_loop_content] = newly_constructed_asset_prompt_regen; status_visual_regen_main.update(label="Video prompt reconstructed! Regenerating asset...", state="running")
                            if not newly_constructed_asset_prompt_regen: status_visual_regen_main.update(label="Prompt construction failed.", state="error"); continue
                            version_num_viz_asset_regen = 1
                            if asset_info_for_display and asset_info_for_display.get('path') and os.path.exists(asset_info_for_display['path']):
                                try: base_fn_viz_regen,_=os.path.splitext(os.path.basename(asset_info_for_display['path'])); version_num_viz_asset_regen = int(base_fn_viz_regen.split('_v')[-1])+1 if '_v' in base_fn_viz_regen else 2
                                except: version_num_viz_asset_regen = 2
                            if generate_asset_for_scene_wrapper(i_main_loop_content, st.session_state.story_treatment_scenes[i_main_loop_content], version_num=version_num_viz_asset_regen, user_selected_asset_type_override=user_asset_type_choice_viz): status_visual_regen_main.update(label="Asset Updated! 🎉", state="complete", expanded=False)
                            else: status_visual_regen_main.update(label="Prompt updated, asset regen failed.", state="complete", expanded=False)
                            st.rerun()
                    else: st.warning("Please provide feedback for visual asset.")
        st.markdown("---")
    
    if st.session_state.story_treatment_scenes and any(asset_info_item_loop and not asset_info_item_loop.get('error') and asset_info_item_loop.get('path') for asset_info_item_loop in st.session_state.generated_scene_assets_info if asset_info_item_loop is not None):
        if st.button("🎬 Assemble Narrated Cinematic Animatic", key="assemble_video_main_btn_unique", type="primary", use_container_width=True):
            with st.status("Assembling Ultra Animatic...", expanded=True) as status_vid_assembly_main:
                assets_for_final_vid_assembly = []
                for i_vid_assembly_loop, scene_data_for_vid_loop in enumerate(st.session_state.story_treatment_scenes):
                    asset_info_curr_scene_vid = st.session_state.generated_scene_assets_info[i_vid_assembly_loop] if i_vid_assembly_loop < len(st.session_state.generated_scene_assets_info) else None
                    if asset_info_curr_scene_vid and not asset_info_curr_scene_vid.get('error') and asset_info_curr_scene_vid.get('path') and os.path.exists(asset_info_curr_scene_vid['path']):
                        assets_for_final_vid_assembly.append({'path': asset_info_curr_scene_vid['path'], 'type': asset_info_curr_scene_vid.get('type', 'image'), 'scene_num': scene_data_for_vid_loop.get('scene_number', i_vid_assembly_loop + 1), 'key_action': scene_data_for_vid_loop.get('key_plot_beat', ''), 'duration': scene_data_for_vid_loop.get('user_scene_duration_secs', DEFAULT_SCENE_DURATION_SECS)})
                        status_vid_assembly_main.write(f"Adding S{scene_data_for_vid_loop.get('scene_number', i_vid_assembly_loop + 1)} ({asset_info_curr_scene_vid.get('type')}).")
                    else: logger.warning(f"Skipping S{scene_data_for_vid_loop.get('scene_number', i_vid_assembly_loop+1)} for video: No valid asset.")
                if assets_for_final_vid_assembly:
                    status_vid_assembly_main.write("Calling video engine...");
                    st.session_state.video_path = st.session_state.visual_engine.assemble_animatic_from_assets(asset_data_list=assets_for_final_vid_assembly, overall_narration_path=st.session_state.overall_narration_audio_path, output_filename="cinegen_ultra_animatic.mp4", fps=24)
                    if st.session_state.video_path and os.path.exists(st.session_state.video_path): status_vid_assembly_main.update(label="Ultra animatic assembled! 🎉", state="complete", expanded=False); st.balloons()
                    else: status_vid_assembly_main.update(label="Video assembly failed. Check logs.", state="error", expanded=False); logger.error("Video assembly returned None or file does not exist.")
                else: status_vid_assembly_main.update(label="No valid assets for video assembly.", state="error", expanded=False); logger.warning("No valid assets found for video assembly.")
    elif st.session_state.story_treatment_scenes: st.info("Generate visual assets before assembling the animatic.")

    if st.session_state.video_path and os.path.exists(st.session_state.video_path):
        st.header("🎬 Generated Cinematic Animatic"); 
        try:
            with open(st.session_state.video_path, 'rb') as vf_obj_read_final: video_bytes_final_content = vf_obj_read_final.read()
            st.video(video_bytes_final_content, format="video/mp4") 
            st.download_button(label="Download Ultra Animatic", data=video_bytes_final_content, file_name=os.path.basename(st.session_state.video_path), mime="video/mp4", use_container_width=True, key="download_video_main_btn_unique" )
        except Exception as e_vid_final_disp_main: st.error(f"Error displaying final video: {e_vid_final_disp_main}"); logger.error(f"Error displaying final video: {e_vid_final_disp_main}", exc_info=True)

st.sidebar.markdown("---"); st.sidebar.caption("CineGen AI Ultra+ | Visionary Cinematic Pre-Production")