app.py

# app.py
import streamlit as st
import os
import logging

# --- Streamlit PermissionError Mitigation Attempts ---
if "STREAMLIT_CLIENT_GATHER_USAGE_STATS" not in os.environ:
    os.environ["STREAMLIT_CLIENT_GATHER_USAGE_STATS"] = "false"
if "STREAMLIT_BROWSER_GATHERUSAGESTATS" not in os.environ:
    os.environ["STREAMLIT_BROWSER_GATHERUSAGESTATS"] = "false"
streamlit_home_path_app = "/app/.streamlit_cai_config_v2"
if "STREAMLIT_HOME" not in os.environ and os.getcwd().startswith("/app"):
    os.environ["STREAMLIT_HOME"] = streamlit_home_path_app
    try: os.makedirs(streamlit_home_path_app, exist_ok=True)
    except Exception: pass # Ignore if fails, Dockerfile ENV is primary

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
)

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 (%(module)s.%(funcName)s:%(lineno)d)')
logger = logging.getLogger(__name__)

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_st, key_name_e, service_n):
    key_val = None; secrets_avail = hasattr(st, 'secrets')
    try:
        if secrets_avail and key_name_st in st.secrets: key_val = st.secrets.get(key_name_st);
        if key_val: logger.info(f"API Key for {service_n} found in St secrets.")
    except Exception as e: logger.warning(f"No st.secrets for {key_name_st} ({service_n}): {e}")
    if not key_val and key_name_e in os.environ: key_val = os.environ.get(key_name_e);
    if key_val: logger.info(f"API Key for {service_n} found in env var '{key_name_e}'.")
    if not key_val: logger.warning(f"API Key for {service_n} (Key: {key_name_st}/{key_name_e}) NOT FOUND.")
    return key_val

if 'services_initialized_flag' not in st.session_state:
    logger.info("APP_INIT: Initializing services and API keys...")
    # (API Key Loading as before)
    st.session_state.API_KEY_GEMINI = load_api_key("GEMINI_API_KEY", "GEMINI_API_KEY", "Gemini")
    st.session_state.API_KEY_OPENAI = load_api_key("OPENAI_API_KEY", "OPENAI_API_KEY", "OpenAI/DALL-E")
    st.session_state.API_KEY_ELEVENLABS = load_api_key("ELEVENLABS_API_KEY", "ELEVENLABS_API_KEY", "ElevenLabs")
    st.session_state.API_KEY_PEXELS = load_api_key("PEXELS_API_KEY", "PEXELS_API_KEY", "Pexels")
    st.session_state.CONFIG_ELEVENLABS_VOICE_ID = load_api_key("ELEVENLABS_VOICE_ID", "ELEVENLABS_VOICE_ID", "ElevenLabs Voice ID")
    st.session_state.API_KEY_RUNWAYML = load_api_key("RUNWAY_API_KEY", "RUNWAY_API_KEY", "RunwayML")

    if not st.session_state.API_KEY_GEMINI: st.error("CRITICAL: Gemini API Key missing!"); logger.critical("Gemini API Key missing."); st.stop()
    try: st.session_state.gemini_service_handler = GeminiHandler(api_key=st.session_state.API_KEY_GEMINI); logger.info("GeminiHandler initialized.")
    except Exception as e: st.error(f"CRITICAL: GeminiHandler init fail: {e}"); logger.critical(f"GeminiHandler init fail: {e}", exc_info=True); st.stop()
    try:
        el_def_voice = "Rachel"; el_res_voice_id = st.session_state.CONFIG_ELEVENLABS_VOICE_ID or el_def_voice
        st.session_state.visual_content_engine = VisualEngine(output_dir="temp_cinegen_media", default_elevenlabs_voice_id=el_res_voice_id)
        st.session_state.visual_content_engine.set_openai_api_key(st.session_state.API_KEY_OPENAI)
        st.session_state.visual_content_engine.set_elevenlabs_api_key(st.session_state.API_KEY_ELEVENLABS, voice_id_from_secret=st.session_state.CONFIG_ELEVENLABS_VOICE_ID)
        st.session_state.visual_content_engine.set_pexels_api_key(st.session_state.API_KEY_PEXELS)
        st.session_state.visual_content_engine.set_runway_api_key(st.session_state.API_KEY_RUNWAYML)
        logger.info("VisualEngine initialized and keys set.")
    except Exception as e: st.error(f"CRITICAL: VisualEngine init fail: {e}"); logger.critical(f"VisualEngine init fail: {e}", exc_info=True); st.warning("VisualEngine critical setup issue."); st.stop()
    st.session_state.services_initialized_flag = True; logger.info("APP_INIT: Service initialization complete.")

PROJECT_SS_DEFAULTS = {'project_story_treatment_scenes_list':[],'project_scene_generation_prompts_list':[],'project_generated_assets_info_list':[],'project_final_video_path':None,'project_character_definitions_map':{},'project_global_style_keywords_str':"",'project_overall_narration_audio_path':None,'project_narration_script_text':""}
for k_ss, def_v_ss in PROJECT_SS_DEFAULTS.items():
    if k_ss not in st.session_state: st.session_state[k_ss] = def_v_ss

def initialize_new_project_data_in_session():
    st.session_state.project_story_treatment_scenes_list = []; st.session_state.project_scene_generation_prompts_list = []; st.session_state.project_generated_assets_info_list = []
    st.session_state.project_final_video_path = None; st.session_state.project_overall_narration_audio_path = None; st.session_state.project_narration_script_text = ""
    logger.info("PROJECT_DATA: New project data re-initialized.")

def generate_asset_for_scene_in_app(sc_idx, sc_data, asset_v=1, user_asset_type_ui="Auto (Director's Choice)"):
    # (Logic as in previous app.py, ensuring it uses scene_data_dict for visual_engine call)
    logger.debug(f"APP: generate_asset_for_scene_in_app for S_idx {sc_idx}, ver {asset_v}, user_type: {user_asset_type_ui}")
    gen_as_vid_final = False; gemini_sugg_type = sc_data.get('suggested_asset_type_감독', 'image').lower()
    if user_asset_type_ui=="Image": gen_as_vid_final=False
    elif user_asset_type_ui=="Video Clip": gen_as_vid_final=True
    elif user_asset_type_ui=="Auto (Director's Choice)": gen_as_vid_final=(gemini_sugg_type=="video_clip")
    logger.debug(f"APP: Final asset type: {'Video' if gen_as_vid_final else 'Image'}")
    prompt_base_img = construct_dalle_prompt(sc_data,st.session_state.project_character_definitions_map,st.session_state.project_global_style_keywords_str)
    prompt_motion_vid = ""
    if gen_as_vid_final: prompt_motion_vid=construct_text_to_video_prompt_for_gen4(sc_data,st.session_state.project_global_style_keywords_str) or sc_data.get('video_clip_motion_description_감독',"subtle motion")
    if not prompt_base_img: logger.error(f"Base image prompt construction failed for S{sc_data.get('scene_number',sc_idx+1)}"); return False
    while len(st.session_state.project_scene_generation_prompts_list)<=sc_idx:st.session_state.project_scene_generation_prompts_list.append("")
    while len(st.session_state.project_generated_assets_info_list)<=sc_idx:st.session_state.project_generated_assets_info_list.append(None)
    st.session_state.project_scene_generation_prompts_list[sc_idx]=prompt_motion_vid if gen_as_vid_final else prompt_base_img
    fn_base_asset=f"scene_{sc_data.get('scene_number',sc_idx+1)}_asset_v{asset_v}"
    rwy_dur=sc_data.get('video_clip_duration_estimate_secs_감독',sc_data.get('user_scene_duration_secs',DEFAULT_SCENE_DURATION_SECS));rwy_dur=max(1,rwy_dur)
    asset_res_dict=st.session_state.visual_content_engine.generate_scene_asset(image_generation_prompt_text=prompt_base_img,motion_prompt_text_for_video=prompt_motion_vid,scene_data_dict=sc_data,scene_identifier_fn_base=fn_base_asset,generate_as_video_clip_flag=gen_as_vid_final,runway_target_dur_val=rwy_dur) # Uses scene_data_dict
    st.session_state.project_generated_assets_info_list[sc_idx]=asset_res_dict
    if asset_res_dict and asset_res_dict.get('prompt_used')and st.session_state.project_scene_generation_prompts_list[sc_idx]!=asset_res_dict['prompt_used']:st.session_state.project_scene_generation_prompts_list[sc_idx]=asset_res_dict['prompt_used']
    if asset_res_dict and not asset_res_dict['error']and asset_res_dict.get('path')and os.path.exists(asset_res_dict['path']):logger.info(f"APP: Asset ({asset_res_dict.get('type')}) OK S{sc_data.get('scene_number',sc_idx+1)}:{os.path.basename(asset_res_dict['path'])}");return True
    else:err_msg=asset_res_dict.get('error_message','Unk err')if asset_res_dict else 'Asset res None';logger.warning(f"APP: Asset gen FAIL S{sc_data.get('scene_number',sc_idx+1)}. Type:{'Vid'if gen_as_vid_final else 'Img'}. Err:{err_msg}");curr_p=st.session_state.project_scene_generation_prompts_list[sc_idx];st.session_state.project_generated_assets_info_list[sc_idx]={'path':None,'type':'none','error':True,'error_message':err_msg,'prompt_used':curr_p};return False

with st.sidebar: # Sidebar UI
    if os.path.exists("assets/logo.png"): st.image("assets/logo.png", width=150)
    else: st.sidebar.markdown("## 🎬 CineGen AI Ultra+"); logger.warning("assets/logo.png not found.")
    st.markdown("### Creative Seed")
    sb_user_idea = st.text_area("Core Idea:", "Lone wanderer, mythical oasis, post-apocalyptic desert, mirages, mechanical scavengers.", height=100, key="sb_user_idea_unique")
    sb_genre = st.selectbox("Genre:", ["Cyberpunk", "Sci-Fi", "Fantasy", "Noir", "Thriller", "Western", "Post-Apocalyptic", "Historical Drama", "Surreal"], index=6, key="sb_genre_unique")
    sb_mood = st.selectbox("Mood:", ["Hopeful yet Desperate", "Mysterious & Eerie", "Gritty & Tense", "Epic & Awe-Inspiring", "Melancholy & Reflective", "Whimsical"], index=0, key="sb_mood_unique")
    sb_num_scenes = st.slider("Key Scenes:", 1, 10, 1, key="sb_num_scenes_unique")
    sb_guidance_opts = {"Standard": "standard", "Artistic": "more_artistic", "Experimental": "experimental_narrative"}
    sb_guidance_key = st.selectbox("AI Director Style:", list(sb_guidance_opts.keys()), key="sb_guidance_unique")
    sb_actual_guidance = sb_guidance_opts[sb_guidance_key]

    if st.button("🌌 Generate Cinematic Treatment", type="primary", key="sb_btn_gen_treat_unique", use_container_width=True):
        initialize_new_project_data_in_session()
        if not sb_user_idea.strip(): st.warning("Please provide a story idea.")
        else:
            with st.status("AI Director is envisioning your masterpiece...", expanded=True) as main_status_op: # Renamed this for clarity
                try:
                    main_status_op.write("Phase 1: Crafting treatment... 📜"); logger.info("APP: P1 - Treatment Gen.")
                    prompt_treat = create_cinematic_treatment_prompt(sb_user_idea, sb_genre, sb_mood, sb_num_scenes, sb_actual_guidance)
                    raw_treat_list = st.session_state.gemini_service_handler.generate_story_breakdown(prompt_treat)
                    if not isinstance(raw_treat_list, list) or not raw_treat_list: raise ValueError("Gemini invalid scene list.")
                    init_scenes = []
                    for scene_gemini in raw_treat_list:
                        gem_dur = scene_gemini.get('video_clip_duration_estimate_secs_감독', 0); scene_gemini['user_scene_duration_secs'] = gem_dur if gem_dur > 0 else DEFAULT_SCENE_DURATION_SECS
                        scene_gemini['user_shot_type'] = scene_gemini.get('PROACTIVE_camera_work_감독', DEFAULT_SHOT_TYPE); scene_gemini['user_selected_asset_type'] = "Auto (Director's Choice)"; init_scenes.append(scene_gemini)
                    st.session_state.project_story_treatment_scenes_list = init_scenes
                    num_gen_sc = len(init_scenes); st.session_state.project_scene_generation_prompts_list = [""]*num_gen_sc; st.session_state.project_generated_assets_info_list = [None]*num_gen_sc
                    logger.info(f"APP: P1 done. {num_gen_sc} scenes."); main_status_op.update(label="Treatment complete! ✅ Generating assets...", state="running")
                    main_status_op.write("Phase 2: Creating assets..."); logger.info("APP: P2 - Asset Gen.")
                    success_assets = 0
                    for i, scene_item in enumerate(st.session_state.project_story_treatment_scenes_list):
                        sc_num_log = scene_item.get('scene_number', i+1); main_status_op.write(f"  Asset for Scene {sc_num_log}..."); logger.info(f"  APP: Asset S{sc_num_log}.")
                        if generate_asset_for_scene_in_app(i, scene_item, asset_v=1): success_assets += 1
                    lbl_p2 = "Assets generated! "; next_state = "running"
                    if success_assets == 0 and num_gen_sc > 0: logger.error("APP: Asset gen FAIL all."); lbl_p2 = "Asset gen FAIL all."; next_state="error"; main_status_op.update(label=lbl_p2, state=next_state, expanded=True); st.stop()
                    elif success_assets < num_gen_sc: logger.warning(f"APP: Assets partial ({success_assets}/{num_gen_sc})."); lbl_p2 = f"Assets partial ({success_assets}/{num_gen_sc}). "
                    main_status_op.update(label=f"{lbl_p2}Generating narration...", state=next_state)
                    if next_state == "error": st.stop()
                    main_status_op.write("Phase 3: Narration script..."); logger.info("APP: P3 - Narration Script.")
                    voice_style = st.session_state.get("selected_voice_style_for_generation", "cinematic_trailer")
                    prompt_narr = create_narration_script_prompt_enhanced(st.session_state.project_story_treatment_scenes_list, sb_mood, sb_genre, voice_style)
                    st.session_state.project_narration_script_text = st.session_state.gemini_service_handler.generate_image_prompt(prompt_narr)
                    logger.info("APP: Narration script OK."); main_status_op.update(label="Narration ready! Synthesizing voice...", state="running")
                    main_status_op.write("Phase 4: Synthesizing voice..."); logger.info("APP: P4 - Voice Synth.")
                    st.session_state.project_overall_narration_audio_path = st.session_state.visual_content_engine.generate_narration_audio(st.session_state.project_narration_script_text)
                    final_lbl = "All components ready! Review storyboard. 🚀"; final_state = "complete"
                    if not st.session_state.project_overall_narration_audio_path: final_lbl = f"{lbl_p2}Storyboard ready (Voiceover failed)."; logger.warning("APP: Narration audio fail.")
                    else: logger.info("APP: Narration audio OK.")
                    main_status_op.update(label=final_lbl, state=final_state, expanded=False)
                except ValueError as e_val_main: logger.error(f"APP: ValueError: {e_val_main}", exc_info=True); main_status_op.update(label=f"Data/Response Error: {e_val_main}", state="error", expanded=True);
                except TypeError as e_type_main: logger.error(f"APP: TypeError: {e_type_main}", exc_info=True); main_status_op.update(label=f"Type Error: {e_type_main}", state="error", expanded=True);
                except Exception as e_unhandled_main_flow: logger.error(f"APP_MAIN_FLOW: Unhandled Exception: {e_unhandled_main_flow}", exc_info=True); main_status_op.update(label=f"Unexpected Error: {e_unhandled_main_flow}", state="error", expanded=True);
    
    with st.expander("Define Characters", expanded=False):
        sb_char_name = st.text_input("Character Name", key="sb_char_name_unique_char_main"); sb_char_desc = st.text_area("Visual Description", key="sb_char_desc_unique_char_main", height=100)
        if st.button("Save Character", key="sb_add_char_unique_char_main"):
            if sb_char_name and sb_char_desc: st.session_state.project_character_definitions_map[sb_char_name.strip().lower()] = sb_char_desc.strip(); st.success(f"Char '{sb_char_name.strip()}' saved.")
            else: st.warning("Name and description needed.")
        if st.session_state.project_character_definitions_map: st.caption("Defined Characters:"); [st.markdown(f"**{k.title()}:** _{v}_") for k,v in st.session_state.project_character_definitions_map.items()]
    with st.expander("Global Style Overrides", expanded=False):
        sb_style_presets = { "Default": "", "Noir": "gritty neo-noir...", "Fantasy": "epic fantasy...", "Sci-Fi": "analog sci-fi..."}
        sb_selected_preset = st.selectbox("Base Style Preset:", list(sb_style_presets.keys()), key="sb_style_preset_unique_global_main")
        sb_custom_keywords = st.text_area("Additional Custom Keywords:", key="sb_custom_style_unique_global_main", height=80)
        sb_current_global_style = st.session_state.project_global_style_keywords_str
        if st.button("Apply Global Styles", key="sb_apply_styles_unique_global_main"):
            final_style = sb_style_presets[sb_selected_preset]; 
            if sb_custom_keywords.strip(): final_style = f"{final_style}, {sb_custom_keywords.strip()}" if final_style else sb_custom_keywords.strip()
            st.session_state.project_global_style_keywords_str = final_style.strip(); sb_current_global_style = final_style.strip()
            if sb_current_global_style: st.success("Global styles applied!")
            else: st.info("Global styles cleared.")
        if sb_current_global_style: st.caption(f"Active: \"{sb_current_global_style}\"")
    with st.expander("Voice & Narration Style", expanded=False):
        sb_engine_default_voice = "Rachel"
        if hasattr(st.session_state, 'visual_content_engine'): sb_engine_default_voice = st.session_state.visual_content_engine.elevenlabs_voice_id
        sb_user_voice_id = st.text_input("11L Voice ID (override):", value=sb_engine_default_voice, key="sb_el_voice_id_override_unique_global_main")
        sb_narration_styles = {"Cinematic Trailer": "cinematic_trailer", "Neutral Documentary": "documentary_neutral", "Character Introspection": "introspective_character"}
        sb_selected_narr_style = st.selectbox("Narration Script Style:", list(sb_narration_styles.keys()), key="sb_narr_style_sel_unique_global_main", index=0)
        if st.button("Set Narrator Voice & Style", key="sb_set_voice_btn_unique_global_main"):
            final_el_voice_id = sb_user_voice_id.strip() or st.session_state.get("CONFIG_ELEVENLABS_VOICE_ID", "Rachel")
            if hasattr(st.session_state, 'visual_content_engine'): st.session_state.visual_content_engine.elevenlabs_voice_id = final_el_voice_id
            st.session_state.selected_voice_style_for_generation = sb_narration_styles[sb_selected_narr_style]
            st.success(f"Narrator Voice: {final_el_voice_id}. Script Style: {sb_selected_narr_style}")
            logger.info(f"User updated 11L Voice ID: {final_el_voice_id}, Narr Style: {sb_selected_narr_style}")

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

if not st.session_state.project_story_treatment_scenes_list: 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.project_story_treatment_scenes_list):
        scene_num_for_display = scene_content_item_display.get('scene_number', i_main_loop_content + 1)
        scene_title_for_display_main = scene_content_item_display.get('scene_title', 'Untitled Scene')
        key_base_main_area_widgets = f"s{scene_num_for_display}_main_widgets_loop_v2_{i_main_loop_content}" # Ensure unique keys

        if "director_note" in scene_content_item_display and scene_content_item_display['director_note']: st.info(f"🎬 Director Note S{scene_num_for_display}: {scene_content_item_display['director_note']}")
        st.subheader(f"SCENE {scene_num_for_display}: {scene_title_for_display_main.upper()}")
        
        # <<< CORRECTED COLUMN VARIABLE NAMES >>>
        treatment_display_col, visual_display_col = st.columns([0.45, 0.55]) 

        with treatment_display_col: # Use the correctly defined variable
            with st.expander("📝 Scene Treatment & Controls", expanded=True):
                # (Display textual scene details)
                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")
                ui_shot_type_current = st.session_state.project_story_treatment_scenes_list[i_main_loop_content].get('user_shot_type', DEFAULT_SHOT_TYPE)
                try: ui_shot_type_idx_val = SHOT_TYPES_OPTIONS.index(ui_shot_type_current)
                except ValueError: ui_shot_type_idx_val = SHOT_TYPES_OPTIONS.index(DEFAULT_SHOT_TYPE)
                ui_shot_type_new = st.selectbox("Dominant Shot Type:", options=SHOT_TYPES_OPTIONS, index=ui_shot_type_idx_val, key=f"shot_type_{key_base_main_area_widgets}")
                if ui_shot_type_new != ui_shot_type_current: st.session_state.project_story_treatment_scenes_list[i_main_loop_content]['user_shot_type'] = ui_shot_type_new
                ui_duration_current = st.session_state.project_story_treatment_scenes_list[i_main_loop_content].get('user_scene_duration_secs', DEFAULT_SCENE_DURATION_SECS)
                ui_duration_new = st.number_input("Scene Duration (seconds):", min_value=1, max_value=300, value=ui_duration_current, step=1, key=f"duration_{key_base_main_area_widgets}")
                if ui_duration_new != ui_duration_current: st.session_state.project_story_treatment_scenes_list[i_main_loop_content]['user_scene_duration_secs'] = ui_duration_new
                ui_asset_type_override_current = st.session_state.project_story_treatment_scenes_list[i_main_loop_content].get('user_selected_asset_type', "Auto (Director's Choice)")
                try: ui_asset_type_idx_val = ASSET_TYPE_OPTIONS.index(ui_asset_type_override_current)
                except ValueError: ui_asset_type_idx_val = 0
                ui_asset_type_override_new = st.selectbox("Asset Type Override:", ASSET_TYPE_OPTIONS, index=ui_asset_type_idx_val, key=f"asset_type_{key_base_main_area_widgets}", help="Choose asset type. 'Auto' uses AI suggestion.")
                if ui_asset_type_override_new != ui_asset_type_override_current: st.session_state.project_story_treatment_scenes_list[i_main_loop_content]['user_selected_asset_type'] = ui_asset_type_override_new
                st.markdown("---")
                prompt_for_asset_to_display = st.session_state.project_scene_generation_prompts_list[i_main_loop_content] if i_main_loop_content < len(st.session_state.project_scene_generation_prompts_list) else None
                if prompt_for_asset_to_display:
                     with st.popover("👁️ View Asset Generation Prompt"): st.markdown(f"**Prompt used for current asset:**"); st.code(prompt_for_asset_to_display, language='text')
                pexels_query_to_display = scene_content_item_display.get('pexels_search_query_감독', None)
                if pexels_query_to_display: st.caption(f"Pexels Fallback: `{pexels_query_to_display}`")

        with visual_display_col: # <<< CORRECTED: Use the correctly defined variable name >>>
            current_asset_info_to_display = st.session_state.project_generated_assets_info_list[i_main_loop_content] if i_main_loop_content < len(st.session_state.project_generated_assets_info_list) else None
            if current_asset_info_to_display and not current_asset_info_to_display.get('error') and current_asset_info_to_display.get('path') and os.path.exists(current_asset_info_to_display['path']):
                path_of_asset_for_display = current_asset_info_to_display['path']; type_of_asset_for_display = current_asset_info_to_display.get('type', 'image')
                if type_of_asset_for_display == 'image': st.image(path_of_asset_for_display, caption=f"S{scene_num_for_display} ({type_of_asset_for_display}): {scene_title_for_display_main}")
                elif type_of_asset_for_display == 'video':
                    try:
                        with open(path_of_asset_for_display, 'rb') as vid_file_obj_read: video_bytes_for_st_video = vid_file_obj_read.read()
                        st.video(video_bytes_for_st_video, format="video/mp4", start_time=0); st.caption(f"S{scene_num_for_display} ({type_of_asset_for_display}): {scene_title_for_display_main}")
                    except Exception as e_vid_display_main_loop: st.error(f"Error displaying video {path_of_asset_for_display}: {e_vid_display_main_loop}"); logger.error(f"Error displaying video: {e_vid_display_main_loop}", exc_info=True)
                else: st.warning(f"Unknown asset type '{type_of_asset_for_display}' for S{scene_num_for_display}.")
            else:
                if st.session_state.project_story_treatment_scenes_list:
                    error_msg_for_asset_display = current_asset_info_to_display.get('error_message', 'Visual pending or failed.') if current_asset_info_to_display else 'Visual pending or failed.'
                    st.caption(error_msg_for_asset_display)
            
            with st.popover(f"✏️ Edit S{scene_num_for_display} Treatment"):
                feedback_input_for_treatment_regen = st.text_area("Changes to treatment:", key=f"treat_fb_input_pop_{key_base_main_area_widgets}", height=150)
                if st.button(f"🔄 Update S{scene_num_for_display} Treatment", key=f"regen_treat_btn_pop_{key_base_main_area_widgets}"):
                    if feedback_input_for_treatment_regen:
                        with st.status(f"Updating S{scene_num_for_display} Treatment & Asset...", expanded=True) as status_treatment_update_op_pop:
                            preserved_user_shot_type = st.session_state.project_story_treatment_scenes_list[i_main_loop_content]['user_shot_type']
                            preserved_user_duration = st.session_state.project_story_treatment_scenes_list[i_main_loop_content]['user_scene_duration_secs']
                            preserved_user_asset_type = st.session_state.project_story_treatment_scenes_list[i_main_loop_content]['user_selected_asset_type']
                            prompt_for_gemini_scene_regen_pop = create_scene_regeneration_prompt(scene_item_for_display, feedback_input_for_treatment_regen, st.session_state.project_story_treatment_scenes_list)
                            try:
                                updated_scene_data_from_gemini_pop = st.session_state.gemini_service_handler.regenerate_scene_script_details(prompt_for_gemini_scene_regen_pop)
                                final_merged_updated_scene_data_pop = {**updated_scene_data_from_gemini_pop}
                                final_merged_updated_scene_data_pop['user_shot_type'] = preserved_user_shot_type; final_merged_updated_scene_data_pop['user_scene_duration_secs'] = preserved_user_duration; final_merged_updated_scene_data_pop['user_selected_asset_type'] = preserved_user_asset_type
                                st.session_state.project_story_treatment_scenes_list[i_main_loop_content] = final_merged_updated_scene_data_pop
                                status_treatment_update_op_pop.update(label="Treatment updated! Regenerating asset...", state="running")
                                version_for_regenerated_asset_pop = 1
                                if current_asset_info_to_display and current_asset_info_to_display.get('path') and os.path.exists(current_asset_info_to_display['path']):
                                    try: base_fn_asset_regen_pop,_=os.path.splitext(os.path.basename(current_asset_info_to_display['path'])); version_for_regenerated_asset_pop = int(base_fn_asset_regen_pop.split('_v')[-1])+1 if '_v' in base_fn_asset_regen_pop else 2
                                    except: version_for_regenerated_asset_pop = 2 
                                if generate_asset_for_scene_in_app(i_main_loop_content, final_merged_updated_scene_data_pop, asset_ver_num=version_for_regenerated_asset_pop, user_asset_type_ui=preserved_user_asset_type): status_treatment_update_op_pop.update(label="Treatment & Asset Updated! 🎉", state="complete", expanded=False)
                                else: status_treatment_update_op_pop.update(label="Treatment updated, but asset regeneration failed.", state="complete", expanded=False)
                                st.rerun()
                            except Exception as e_treatment_regen_op_pop: status_treatment_update_op_pop.update(label=f"Error during treatment regen: {e_treatment_regen_op_pop}", state="error"); logger.error(f"Scene treatment regeneration error: {e_treatment_regen_op_pop}", exc_info=True)
                    else: st.warning("Please provide feedback to update the treatment.")

            with st.popover(f"🎨 Edit S{scene_num_for_display} Visual Prompt/Asset"):
                prompt_to_edit_display_pop = st.session_state.project_scene_generation_prompts_list[i_main_loop_content] if i_main_loop_content < len(st.session_state.project_scene_generation_prompts_list) else "No prompt."
                st.caption("Current Asset Generation Prompt:"); st.code(prompt_to_edit_display_pop, language='text')
                feedback_for_visual_asset_regen_input = st.text_area("Describe changes for visual asset:", key=f"visual_fb_input_pop_{key_base_main_area_widgets}", height=150)
                if st.button(f"🔄 Update S{scene_num_for_display} Asset", key=f"regen_visual_btn_pop_{key_base_main_area_widgets}"):
                    if feedback_for_visual_asset_regen_input:
                        with st.status(f"Refining prompt & asset for S{scene_num_for_display}...", expanded=True) as status_visual_asset_regen_op_pop:
                            user_selected_asset_type_for_regen_pop = st.session_state.project_story_treatment_scenes_list[i_main_loop_content]['user_selected_asset_type']
                            is_video_type_for_regen_pop = (user_selected_asset_type_for_regen_pop == "Video Clip") or (user_selected_asset_type_for_regen_pop == "Auto (Director's Choice)" and scene_item_for_display.get('suggested_asset_type_감독') == 'video_clip')
                            newly_constructed_asset_prompt_regen_pop = ""
                            if not is_video_type_for_regen_pop:
                                gemini_refinement_prompt_viz_pop = create_visual_regeneration_prompt(prompt_to_edit_display_pop, feedback_for_visual_asset_regen_input, scene_item_for_display, st.session_state.project_character_definitions_map, st.session_state.project_global_style_keywords_str)
                                try: newly_constructed_asset_prompt_regen_pop = st.session_state.gemini_service_handler.refine_image_prompt_from_feedback(gemini_refinement_prompt_viz_pop); st.session_state.project_scene_generation_prompts_list[i_main_loop_content] = newly_constructed_asset_prompt_regen_pop; status_visual_asset_regen_op_pop.update(label="Image prompt refined! Regenerating asset...", state="running")
                                except Exception as e_gemini_refine_viz_pop: status_visual_asset_regen_op_pop.update(label=f"Error refining prompt: {e_gemini_refine_viz_pop}", state="error"); logger.error(f"Visual prompt refinement error: {e_gemini_refine_viz_pop}", exc_info=True); continue
                            else: 
                                newly_constructed_asset_prompt_regen_pop = construct_text_to_video_prompt_for_gen4(scene_item_for_display, st.session_state.project_global_style_keywords_str); st.session_state.project_scene_generation_prompts_list[i_main_loop_content] = newly_constructed_asset_prompt_regen_pop; status_visual_asset_regen_op_pop.update(label="Video prompt reconstructed! Regenerating asset...", state="running")
                            if not newly_constructed_asset_prompt_regen_pop: status_visual_asset_regen_op_pop.update(label="Prompt construction failed.", state="error"); continue
                            version_for_regenerated_visual_asset_pop = 1
                            if current_asset_info_to_display and current_asset_info_to_display.get('path') and os.path.exists(current_asset_info_to_display['path']):
                                try: base_fn_viz_regen_pop,_=os.path.splitext(os.path.basename(current_asset_info_to_display['path'])); version_for_regenerated_visual_asset_pop = int(base_fn_viz_regen_pop.split('_v')[-1])+1 if '_v' in base_fn_viz_regen_pop else 2
                                except: version_for_regenerated_visual_asset_pop = 2
                            if generate_asset_for_scene_in_app(i_main_loop_content, st.session_state.project_story_treatment_scenes_list[i_main_loop_content], asset_ver_num=version_for_regenerated_visual_asset_pop, user_asset_type_ui=user_selected_asset_type_for_regen_pop): status_visual_asset_regen_op_pop.update(label="Asset Updated! 🎉", state="complete", expanded=False)
                            else: status_visual_asset_regen_op_pop.update(label="Prompt updated, asset regen failed.", state="complete", expanded=False)
                            st.rerun()
                    else: st.warning("Please provide feedback for visual asset regeneration.")
        st.markdown("---")
    
    if st.session_state.project_story_treatment_scenes_list and any(asset_info_item_vid_assembly and not asset_info_item_vid_assembly.get('error') and asset_info_item_vid_assembly.get('path') for asset_info_item_vid_assembly in st.session_state.project_generated_assets_info_list if asset_info_item_vid_assembly is not None):
        if st.button("🎬 Assemble Narrated Cinematic Animatic", key="assemble_video_main_area_btn_final_unique_3", type="primary", use_container_width=True):
            with st.status("Assembling Ultra Animatic...", expanded=True) as status_video_assembly_final_op_main:
                assets_for_final_video_assembly_list_main = []
                for i_vid_assembly_main_loop, scene_data_for_vid_assembly_main in enumerate(st.session_state.project_story_treatment_scenes_list):
                    asset_info_current_scene_for_vid_main = st.session_state.project_generated_assets_info_list[i_vid_assembly_main_loop] if i_vid_assembly_main_loop < len(st.session_state.project_generated_assets_info_list) else None
                    if asset_info_current_scene_for_vid_main and not asset_info_current_scene_for_vid_main.get('error') and asset_info_current_scene_for_vid_main.get('path') and os.path.exists(asset_info_current_scene_for_vid_main['path']):
                        assets_for_final_video_assembly_list_main.append({'path': asset_info_current_scene_for_vid_main['path'], 'type': asset_info_current_scene_for_vid_main.get('type', 'image'), 'scene_num': scene_data_for_vid_assembly_main.get('scene_number', i_vid_assembly_main_loop + 1), 'key_action': scene_data_for_vid_assembly_main.get('key_plot_beat', ''), 'duration': scene_data_for_vid_assembly_main.get('user_scene_duration_secs', DEFAULT_SCENE_DURATION_SECS)})
                        status_video_assembly_final_op_main.write(f"Adding S{scene_data_for_vid_assembly_main.get('scene_number', i_vid_assembly_main_loop + 1)} ({asset_info_current_scene_for_vid_main.get('type')}).")
                    else: logger.warning(f"Skipping S{scene_data_for_vid_assembly_main.get('scene_number', i_vid_assembly_main_loop+1)} for video: No valid asset.")
                if assets_for_final_video_assembly_list_main:
                    status_video_assembly_final_op_main.write("Calling video engine..."); logger.info("APP: Calling visual_engine.assemble_animatic_from_assets")
                    st.session_state.project_final_video_path = st.session_state.visual_content_engine.assemble_animatic_from_assets(asset_data_list=assets_for_final_video_assembly_list_main, overall_narration_path=st.session_state.project_overall_narration_audio_path, output_filename="cinegen_ultra_animatic.mp4", fps=24)
                    if st.session_state.project_final_video_path and os.path.exists(st.session_state.project_final_video_path): status_video_assembly_final_op_main.update(label="Ultra animatic assembled! 🎉", state="complete", expanded=False); st.balloons()
                    else: status_video_assembly_final_op_main.update(label="Video assembly failed. Check logs.", state="error", expanded=True); logger.error("APP: Video assembly returned None or file does not exist.")
                else: status_video_assembly_final_op_main.update(label="No valid assets for video assembly.", state="error", expanded=True); logger.warning("APP: No valid assets found for video assembly.")
    elif st.session_state.project_story_treatment_scenes_list: st.info("Generate visual assets for your scenes before attempting to assemble the animatic.")

    if st.session_state.project_final_video_path and os.path.exists(st.session_state.project_final_video_path):
        st.header("🎬 Generated Cinematic Animatic"); 
        try:
            with open(st.session_state.project_final_video_path, 'rb') as final_video_file_obj_display_main: final_video_bytes_for_display_main = final_video_file_obj_display_main.read()
            st.video(final_video_bytes_for_display_main, format="video/mp4") 
            st.download_button(label="Download Ultra Animatic", data=final_video_bytes_for_display_main, file_name=os.path.basename(st.session_state.project_final_video_path), mime="video/mp4", use_container_width=True, key="download_video_main_area_btn_final_unique_3" )
        except Exception as e_final_video_display_op_main_area: st.error(f"Error displaying final animatic video: {e_final_video_display_op_main_area}"); logger.error(f"Error displaying final animatic video: {e_final_video_display_op_main_area}", exc_info=True)

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