app.py

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

# --- Streamlit PermissionError Mitigation Attempts (Python level) ---
# These are fallbacks; Dockerfile ENV STREAMLIT_HOME is the primary fix for '/.streamlit'
if "STREAMLIT_CLIENT_GATHER_USAGE_STATS" not in os.environ:
    os.environ["STREAMLIT_CLIENT_GATHER_USAGE_STATS"] = "false"
    print("INFO: app.py - Disabled Streamlit client usage stats gathering via env var.")

if "STREAMLIT_BROWSER_GATHERUSAGESTATS" not in os.environ: # Another potential flag
    os.environ["STREAMLIT_BROWSER_GATHERUSAGESTATS"] = "false"
    print("INFO: app.py - Set STREAMLIT_BROWSER_GATHERUSAGESTATS to false.")

# If running in /app and STREAMLIT_HOME isn't set, try to define a writable one.
# The Dockerfile's ENV STREAMLIT_HOME should ideally handle this.
streamlit_home_path_app = "/app/.streamlit_cai_config" # Using a unique name
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)
        # In Docker, this path should already be writable by the app user if Dockerfile is set up correctly.
        print(f"INFO: app.py - Set STREAMLIT_HOME to: {streamlit_home_path_app}")
    except Exception as e_mkdir_sh:
        print(f"WARNING: app.py - Could not create STREAMLIT_HOME '{streamlit_home_path_app}': {e_mkdir_sh}")


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
)

# --- Page Config & Logging ---
st.set_page_config(page_title="CineGen AI Ultra+", layout="wide", initial_sidebar_state="expanded")
# Configure logging (level can be adjusted for production vs. development)
logging.basicConfig(
    level=logging.DEBUG, # DEBUG for development, INFO for production
    format='%(asctime)s - %(name)s [%(levelname)s] - %(message)s (%(module)s.%(funcName)s:%(lineno)d)'
)
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"]

# --- API Key Loading ---
def load_api_key(key_name_streamlit, key_name_env, service_name):
    key_value = None
    secrets_available = hasattr(st, 'secrets')
    try:
        if secrets_available and key_name_streamlit in st.secrets:
            key_value = st.secrets.get(key_name_streamlit) # Use .get for safety
            if key_value: logger.info(f"API Key for {service_name} found in Streamlit secrets.")
    except Exception as e_secrets: logger.warning(f"Could not access st.secrets for {key_name_streamlit} ({service_name}): {e_secrets}")
    if not key_value and key_name_env in os.environ:
        key_value = os.environ.get(key_name_env) # Use .get for safety
        if key_value: logger.info(f"API Key for {service_name} found in env var '{key_name_env}'.")
    if not key_value: logger.warning(f"API Key for {service_name} (Key: {key_name_streamlit}/{key_name_env}) NOT FOUND. Service may be disabled.")
    return key_value

# --- Service Initialization (Singleton Pattern using Session State) ---
if 'services_initialized_flag' not in st.session_state: # Renamed flag for clarity
    logger.info("APP_INIT: Initializing services and API keys...")
    # Load all keys first
    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")

    # Critical services check
    if not st.session_state.API_KEY_GEMINI:
        st.error("CRITICAL FAILURE: Gemini API Key is missing! Application cannot function without it."); logger.critical("Gemini API Key missing."); st.stop()
    
    # Initialize Gemini Handler
    try:
        st.session_state.gemini_service_handler = GeminiHandler(api_key=st.session_state.API_KEY_GEMINI) # Renamed
        logger.info("APP_INIT: GeminiHandler component initialized successfully.")
    except Exception as e_gem_init:
        st.error(f"CRITICAL FAILURE: Failed to initialize GeminiHandler: {e_gem_init}"); logger.critical(f"GeminiHandler init failed: {e_gem_init}", exc_info=True); st.stop()
    
    # Initialize Visual Engine
    try:
        el_default_voice = "Rachel" # Hardcoded fallback default
        el_resolved_voice_id = st.session_state.CONFIG_ELEVENLABS_VOICE_ID or el_default_voice
        
        # <<< THIS IS WHERE VisualEngine IS INSTANTIATED >>>
        st.session_state.visual_content_engine = VisualEngine( # Renamed
            output_dir="temp_cinegen_media",
            default_elevenlabs_voice_id=el_resolved_voice_id
        )
        # Set keys for individual services within VisualEngine
        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("APP_INIT: VisualEngine component initialized and all sub-service API keys configured.")
    except Exception as e_vis_eng_init:
        st.error(f"CRITICAL FAILURE: Failed to initialize VisualEngine: {e_vis_eng_init}"); logger.critical(f"VisualEngine init or key setting failed: {e_vis_eng_init}", exc_info=True); st.warning("VisualEngine encountered a critical setup issue. Many features will be disabled or will fail."); st.stop()
    
    st.session_state.services_initialized_flag = True
    logger.info("APP_INIT: All services initialized successfully.")

# Initialize project-specific session state variables
for project_ss_key, project_ss_default_val in [
    ('project_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_narration_audio_filepath', None),
    ('project_narration_script_text', "")
]:
    if project_ss_key not in st.session_state: st.session_state[project_ss_key] = project_ss_default_val

def initialize_new_project_data_in_session():
    st.session_state.project_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 # Corrected key
    st.session_state.project_narration_script_text = ""
    logger.info("PROJECT_DATA: New project data initialized (treatment, assets, narration). Character defs and global styles persist.")

# --- Asset Generation Wrapper ---
def generate_asset_for_scene_in_app(scene_idx_num, scene_data_obj, asset_ver_num=1, user_asset_type_choice_ui="Auto (Director's Choice)"):
    logger.debug(f"APP: generate_asset_for_scene_in_app called for scene index {scene_idx_num}, version {asset_ver_num}, user type: {user_asset_type_choice_ui}")
    
    final_decision_generate_as_video = False
    gemini_suggested_type = scene_data_obj.get('suggested_asset_type_감독', 'image').lower()

    if user_asset_type_choice_ui == "Image": final_decision_generate_as_video = False
    elif user_asset_type_choice_ui == "Video Clip": final_decision_generate_as_video = True
    elif user_asset_type_choice_ui == "Auto (Director's Choice)": final_decision_generate_as_video = (gemini_suggested_type == "video_clip")
    logger.debug(f"APP: Final decision for asset type: {'Video' if final_decision_generate_as_video else 'Image'}")

    prompt_for_base_img_gen = construct_dalle_prompt(scene_data_obj, st.session_state.project_character_definitions_map, st.session_state.project_global_style_keywords_str)
    prompt_for_runway_motion = ""
    if final_decision_generate_as_video:
        prompt_for_runway_motion = construct_text_to_video_prompt_for_gen4(scene_data_obj, st.session_state.project_global_style_keywords_str)
        if not prompt_for_runway_motion: prompt_for_runway_motion = scene_data_obj.get('video_clip_motion_description_감독', "subtle ambient cinematic motion"); logger.warning(f"S{scene_data_obj.get('scene_number', scene_idx_num+1)}: Empty motion prompt, using default for Runway.")

    if not prompt_for_base_img_gen: logger.error(f"Base image prompt construction failed for S{scene_data_obj.get('scene_number', scene_idx_num+1)}"); return False
    
    # Ensure session state lists are long enough
    while len(st.session_state.project_scene_generation_prompts_list) <= scene_idx_num: st.session_state.project_scene_generation_prompts_list.append("")
    while len(st.session_state.project_generated_assets_info_list) <= scene_idx_num: st.session_state.project_generated_assets_info_list.append(None)

    st.session_state.project_scene_generation_prompts_list[scene_idx_num] = prompt_for_runway_motion if final_decision_generate_as_video else prompt_for_base_img_gen
    
    filename_base_for_output_asset = f"scene_{scene_data_obj.get('scene_number', scene_idx_num+1)}_asset_v{asset_ver_num}"
    duration_for_rwy_vid = scene_data_obj.get('video_clip_duration_estimate_secs_감독', scene_data_obj.get('user_scene_duration_secs', DEFAULT_SCENE_DURATION_SECS))
    if duration_for_rwy_vid <= 0 : duration_for_rwy_vid = DEFAULT_SCENE_DURATION_SECS

    generated_asset_info_dict = st.session_state.visual_content_engine.generate_scene_asset(
        image_generation_prompt_text=prompt_for_base_img_gen,
        motion_prompt_text_for_video=prompt_for_runway_motion,
        scene_data_dict=scene_data_obj,  # <<< CORRECTED KEYWORD ARGUMENT NAME
        scene_identifier_fn_base=filename_base_for_output_asset,
        generate_as_video_clip_flag=final_decision_generate_as_video,
        runway_target_dur_val=duration_for_rwy_vid
    )
    st.session_state.project_generated_assets_info_list[scene_idx_num] = generated_asset_info_dict
    if generated_asset_info_dict and generated_asset_info_dict.get('prompt_used') and \
       st.session_state.project_scene_generation_prompts_list[scene_idx_num] != generated_asset_info_dict['prompt_used']:
        st.session_state.project_scene_generation_prompts_list[scene_idx_num] = generated_asset_info_dict['prompt_used']

    if generated_asset_info_dict and not generated_asset_info_dict['error'] and generated_asset_info_dict.get('path') and os.path.exists(generated_asset_info_dict['path']):
        logger.info(f"APP: Asset ({generated_asset_info_dict.get('type')}) generated for S{scene_data_obj.get('scene_number', scene_idx_num+1)}: {os.path.basename(generated_asset_info_dict['path'])}")
        return True
    else:
        error_msg_from_asset_gen = generated_asset_info_dict.get('error_message', 'Unknown error') if generated_asset_info_dict else 'Asset result dictionary is None'
        logger.warning(f"APP: Asset gen FAILED for S{scene_data_obj.get('scene_number', scene_idx_num+1)}. Type: {'Video' if final_decision_generate_as_video else 'Image'}. Err: {error_msg_from_asset_gen}")
        current_prompt = st.session_state.project_scene_generation_prompts_list[scene_idx_num]
        st.session_state.project_generated_assets_info_list[scene_idx_num] = {'path': None, 'type': 'none', 'error': True, 'error_message': error_msg_from_asset_gen, 'prompt_used': current_prompt}
        return False

# --- Sidebar UI ---
with st.sidebar:
    st.image("assets/logo.png", width=150) # Display logo
    st.title("CineGen AI Ultra+")
    st.markdown("### Creative Seed")
    ui_user_idea = 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=100, key="ui_user_idea")
    ui_genre = st.selectbox("Primary Genre:", ["Cyberpunk", "Sci-Fi", "Fantasy", "Noir", "Thriller", "Western", "Post-Apocalyptic", "Historical Drama", "Surreal"], index=6, key="ui_genre")
    ui_mood = st.selectbox("Overall Mood:", ["Hopeful yet Desperate", "Mysterious & Eerie", "Gritty & Tense", "Epic & Awe-Inspiring", "Melancholy & Reflective", "Whimsical & Lighthearted"], index=0, key="ui_mood")
    ui_num_scenes = st.slider("Number of Key Scenes:", 1, 10, 1, key="ui_num_scenes")
    ui_creative_guidance_map = {"Standard Director": "standard", "Artistic Visionary": "more_artistic", "Experimental Storyteller": "experimental_narrative"}
    ui_selected_guidance_key = st.selectbox("AI Creative Director Style:", options=list(ui_creative_guidance_map.keys()), key="ui_creative_guidance")
    ui_actual_guidance = ui_creative_guidance_map[ui_selected_guidance_key]

    if st.button("🌌 Generate Cinematic Treatment", type="primary", key="btn_generate_treatment", use_container_width=True):
        initialize_new_project_data_in_session()
        if not ui_user_idea.strip(): st.warning("Please provide a story idea.")
        else:
            with st.status("AI Director is envisioning your masterpiece...", expanded=True) as status_operation:
                try:
                    status_operation.write("Phase 1: Gemini crafting cinematic treatment... 📜"); logger.info("APP_MAIN_FLOW: Phase 1 - Treatment Gen.")
                    prompt_for_treatment = create_cinematic_treatment_prompt(ui_user_idea, ui_genre, ui_mood, ui_num_scenes, ui_actual_guidance)
                    list_of_raw_treatment_scenes = st.session_state.gemini_service_handler.generate_story_breakdown(prompt_for_treatment)
                    if not isinstance(list_of_raw_treatment_scenes, list) or not list_of_raw_treatment_scenes: raise ValueError("Gemini returned invalid scene list format.")
                    
                    temp_processed_scenes = []
                    for scene_data_gemini in list_of_raw_treatment_scenes:
                        gemini_dur_est = scene_data_gemini.get('video_clip_duration_estimate_secs_감독', 0)
                        scene_data_gemini['user_scene_duration_secs'] = gemini_dur_est if gemini_dur_est > 0 else DEFAULT_SCENE_DURATION_SECS
                        scene_data_gemini['user_shot_type'] = scene_data_gemini.get('PROACTIVE_camera_work_감독', DEFAULT_SHOT_TYPE)
                        scene_data_gemini['user_selected_asset_type'] = "Auto (Director's Choice)"
                        temp_processed_scenes.append(scene_data_gemini)
                    st.session_state.project_story_treatment_scenes = temp_processed_scenes
                    
                    num_scenes_generated = len(st.session_state.project_story_treatment_scenes)
                    st.session_state.project_scene_generation_prompts_list = [""]*num_scenes_generated
                    st.session_state.project_generated_assets_info_list = [None]*num_scenes_generated
                    logger.info(f"APP_MAIN_FLOW: Phase 1 complete. {num_scenes_generated} scenes."); status_operation.update(label="Treatment complete! ✅ Generating visual assets...", state="running")

                    status_operation.write("Phase 2: Creating visual assets..."); logger.info("APP_MAIN_FLOW: Phase 2 - Asset Gen.")
                    num_successful_assets = 0
                    for idx, scene_item_data in enumerate(st.session_state.project_story_treatment_scenes):
                        scene_num_log = scene_item_data.get('scene_number', idx+1)
                        status_operation.write(f"  Processing asset for Scene {scene_num_log}..."); logger.info(f"  APP_MAIN_FLOW: Processing asset for Scene {scene_num_log}.")
                        if generate_asset_for_scene_in_app(idx, scene_item_data, asset_ver_num=1): num_successful_assets += 1
                        
                    status_label_p2 = "Visual assets generated! "; next_state_p2 = "running"
                    if num_successful_assets == 0 and num_scenes_generated > 0: logger.error("APP_MAIN_FLOW: Asset gen FAILED for all scenes."); status_label_p2 = "Asset gen FAILED for all scenes."; next_state_p2="error"; status_operation.update(label=status_label_p2, state=next_state_p2, expanded=True); st.stop()
                    elif num_successful_assets < num_scenes_generated: logger.warning(f"APP_MAIN_FLOW: Assets partially generated ({num_successful_assets}/{num_scenes_generated})."); status_label_p2 = f"Assets partially done ({num_successful_assets}/{num_scenes_generated}). "
                    status_operation.update(label=f"{status_label_p2}Generating narration...", state=next_state_p2)
                    if next_state_p2 == "error": st.stop()

                    status_operation.write("Phase 3: Generating narration script..."); logger.info("APP_MAIN_FLOW: Phase 3 - Narration Script.")
                    voice_style_narr = st.session_state.get("selected_voice_style_for_generation", "cinematic_trailer")
                    prompt_narr_script = create_narration_script_prompt_enhanced(st.session_state.project_story_treatment_scenes, ui_mood, ui_genre, voice_style_narr)
                    st.session_state.project_narration_script_text = st.session_state.gemini_service_handler.generate_image_prompt(prompt_narr_script) # generate_image_prompt for general text
                    logger.info("APP_MAIN_FLOW: Narration script generated."); status_operation.update(label="Narration script ready! Synthesizing voice...", state="running")
                    
                    status_operation.write("Phase 4: Synthesizing voice (ElevenLabs)..."); logger.info("APP_MAIN_FLOW: Phase 4 - Voice Synthesis.")
                    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_status_msg = "All initial components ready! Review storyboard. 🚀"; final_op_status_val = "complete"
                    if not st.session_state.project_overall_narration_audio_path: final_status_msg = f"{status_label_p2}Storyboard ready (Voiceover failed/skipped)."; logger.warning("APP_MAIN_FLOW: Narration audio failed/skipped.")
                    else: logger.info("APP_MAIN_FLOW: Narration audio generated.")
                    status_operation.update(label=final_status_msg, state=final_op_status_val, expanded=False)
                except ValueError as e_val: logger.error(f"APP_MAIN_FLOW: ValueError: {e_val}", exc_info=True); status_operation.update(label=f"Data/Response Error: {e_val}", state="error", expanded=True);
                except TypeError as e_type: logger.error(f"APP_MAIN_FLOW: TypeError: {e_type}", exc_info=True); status_operation.update(label=f"Type Error: {e_type}", state="error", expanded=True);
                except Exception as e_gen: logger.error(f"APP_MAIN_FLOW: Unhandled Exception: {e_gen}", exc_info=True); status_operation.update(label=f"Unexpected Error: {e_gen}", state="error", expanded=True);
    
    with st.expander("Define Characters", expanded=False):
        # (Keep as before - unique keys for inputs)
        sb_char_name_input = st.text_input("Character Name", key="sb_char_name_unique_2"); sb_char_desc_input = st.text_area("Visual Description", key="sb_char_desc_unique_2", height=100, placeholder="e.g., Jax: rugged astronaut...")
        if st.button("Save Character", key="sb_add_char_unique_2"):
            if sb_char_name_input and sb_char_desc_input: st.session_state.project_character_definitions_map[sb_char_name_input.strip().lower()] = sb_char_desc_input.strip(); st.success(f"Character '{sb_char_name_input.strip()}' saved.")
            else: st.warning("Both character name and description are required.")
        if st.session_state.project_character_definitions_map: st.caption("Defined Characters:"); [st.markdown(f"**{char_key.title()}:** _{char_val}_") for char_key,char_val in st.session_state.project_character_definitions_map.items()]
    
    with st.expander("Global Style Overrides", expanded=False):
        # (Keep as before - unique keys for inputs)
        sb_style_presets_map = { "Default (Director's Choice)": "", "Hyper-Realistic Gritty Noir": "hyper-realistic gritty neo-noir, extreme detail...", "Surreal Dreamscape Fantasy": "surreal dreamscape, epic fantasy elements...", "Vintage Analog Sci-Fi": "70s/80s analog sci-fi film aesthetic..."}
        sb_selected_preset_key_style = st.selectbox("Base Style Preset:", options=list(sb_style_presets_map.keys()), key="sb_style_preset_unique_2")
        sb_custom_keywords_style = st.text_area("Additional Custom Style Keywords:", key="sb_custom_style_unique_2", height=80, placeholder="e.g., 'Dutch angle', 'lens flare'")
        sb_current_global_style_display = st.session_state.project_global_style_keywords_str
        if st.button("Apply Global Styles", key="sb_apply_styles_unique_2"):
            final_style_str_global = sb_style_presets_map[sb_selected_preset_key_style]; 
            if sb_custom_keywords_style.strip(): final_style_str_global = f"{final_style_str_global}, {sb_custom_keywords_style.strip()}" if final_style_str_global else sb_custom_keywords_style.strip()
            st.session_state.project_global_style_keywords_str = final_style_str_global.strip(); sb_current_global_style_display = final_style_str_global.strip()
            if sb_current_global_style_display: st.success("Global visual styles applied!")
            else: st.info("Global visual style additions cleared.")
        if sb_current_global_style_display: st.caption(f"Active global styles: \"{sb_current_global_style_display}\"")

    with st.expander("Voice & Narration Style", expanded=False):
        # (Keep as before - unique keys for inputs)
        sb_engine_default_voice_val_narr = "Rachel"
        if hasattr(st.session_state, 'visual_content_engine') and st.session_state.visual_content_engine: sb_engine_default_voice_val_narr = st.session_state.visual_content_engine.elevenlabs_voice_id
        sb_user_voice_id_input_narr = st.text_input("ElevenLabs Voice ID (override):", value=sb_engine_default_voice_val_narr, key="sb_el_voice_id_override_unique_2", help=f"Defaulting to '{sb_engine_default_voice_val_narr}'.")
        sb_narration_styles_map_narr = {"Cinematic Trailer": "cinematic_trailer", "Neutral Documentary": "documentary_neutral", "Character Introspection": "introspective_character"}
        sb_selected_narration_style_key_narr = st.selectbox("Narration Script Style:", list(sb_narration_styles_map_narr.keys()), key="sb_narr_style_sel_unique_2", index=0)
        if st.button("Set Narrator Voice & Style", key="sb_set_voice_btn_unique_2"):
            final_voice_id_to_use_el_narr = sb_user_voice_id_input_narr.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_voice_id_to_use_el_narr
            st.session_state.selected_voice_style_for_generation = sb_narration_styles_map_narr[sb_selected_narration_style_key_narr]
            st.success(f"Narrator Voice ID set to: {final_voice_id_to_use_el_narr}. Script Style: {sb_selected_narration_style_key_narr}")
            logger.info(f"User updated 11L Voice ID: {final_voice_id_to_use_el_narr}, Narration Script Style: {sb_selected_narration_style_key_narr}")

# --- Main Content Area ---
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: st.info("Use the sidebar to generate your cinematic treatment.")
else:
    for i_loop_main_display, scene_item_for_display in enumerate(st.session_state.project_story_treatment_scenes):
        scene_num_for_display = scene_item_for_display.get('scene_number', i_loop_main_display + 1)
        scene_title_for_display_main = scene_item_for_display.get('scene_title', 'Untitled Scene')
        key_base_main_area_widgets = f"s{scene_num_for_display}_main_widgets_{i_loop_main_display}"

        if "director_note" in scene_item_for_display and scene_item_for_display['director_note']: st.info(f"🎬 Director Note S{scene_num_for_display}: {scene_item_for_display['director_note']}")
        st.subheader(f"SCENE {scene_num_for_display}: {scene_title_for_display_main.upper()}"); main_col_treatment_area, main_col_visual_area = st.columns([0.45, 0.55])

        with main_col_treatment_area:
            with st.expander("📝 Scene Treatment & Controls", expanded=True):
                # (Display textual scene details - as before)
                st.markdown(f"**Beat:** {scene_item_for_display.get('emotional_beat', 'N/A')}"); st.markdown(f"**Setting:** {scene_item_for_display.get('setting_description', 'N/A')}"); st.markdown(f"**Chars:** {', '.join(scene_item_for_display.get('characters_involved', ['N/A']))}"); st.markdown(f"**Focus Moment:** _{scene_item_for_display.get('character_focus_moment', 'N/A')}_"); st.markdown(f"**Plot Beat:** {scene_item_for_display.get('key_plot_beat', 'N/A')}"); st.markdown(f"**Dialogue Hook:** `\"{scene_item_for_display.get('suggested_dialogue_hook', '...')}\"`"); st.markdown("---"); st.markdown(f"**Dir. Visual Style:** _{scene_item_for_display.get('PROACTIVE_visual_style_감독', 'N/A')}_"); st.markdown(f"**Dir. Camera:** _{scene_item_for_display.get('PROACTIVE_camera_work_감독', 'N/A')}_"); st.markdown(f"**Dir. Sound:** _{scene_item_for_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, using unique keys)
                ui_shot_type_current = st.session_state.project_story_treatment_scenes[i_loop_main_display].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[i_loop_main_display]['user_shot_type'] = ui_shot_type_new
                ui_duration_current = st.session_state.project_story_treatment_scenes[i_loop_main_display].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[i_loop_main_display]['user_scene_duration_secs'] = ui_duration_new
                ui_asset_type_override_current = st.session_state.project_story_treatment_scenes[i_loop_main_display].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[i_loop_main_display]['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_loop_main_display] if i_loop_main_display < 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_item_for_display.get('pexels_search_query_감독', None)
                if pexels_query_to_display: st.caption(f"Pexels Fallback: `{pexels_query_to_display}`")

        with main_col_visual_area:
            # (Display logic for different asset types - as before)
            current_asset_info_to_display = st.session_state.project_generated_assets_info_list[i_loop_main_display] if i_loop_main_display < 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:
                    error_message_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_message_for_asset_display)
            
            with st.popover(f"✏️ Edit S{scene_num_for_display} Treatment"):
                # (Treatment Regeneration Popover - using corrected generate_asset_for_scene_in_app call)
                feedback_for_treatment_regen_input = st.text_area("Changes to treatment:", key=f"treat_fb_input_pop_{widget_key_base_main_area}", height=150)
                if st.button(f"🔄 Update S{scene_num_for_display} Treatment", key=f"regen_treat_btn_pop_{widget_key_base_main_area}"):
                    if feedback_for_treatment_regen_input:
                        with st.status(f"Updating S{scene_num_for_display} Treatment & Asset...", expanded=True) as status_treatment_update_op_pop:
                            preserved_user_shot_type_pop = st.session_state.project_story_treatment_scenes[i_loop_main_display]['user_shot_type']
                            preserved_user_duration_pop = st.session_state.project_story_treatment_scenes[i_loop_main_display]['user_scene_duration_secs']
                            preserved_user_asset_type_pop = st.session_state.project_story_treatment_scenes[i_loop_main_display]['user_selected_asset_type']
                            prompt_for_gemini_scene_regen_pop = create_scene_regeneration_prompt(scene_item_for_display, feedback_for_treatment_regen_input, st.session_state.project_story_treatment_scenes)
                            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_pop; final_merged_updated_scene_data_pop['user_scene_duration_secs'] = preserved_user_duration_pop; final_merged_updated_scene_data_pop['user_selected_asset_type'] = preserved_user_asset_type_pop
                                st.session_state.project_story_treatment_scenes[i_loop_main_display] = 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_loop_main_display, final_merged_updated_scene_data_pop, asset_ver_num=version_for_regenerated_asset_pop, user_selected_asset_type_override=preserved_user_asset_type_pop): 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"):
                # (Visual Asset Regeneration Popover - using corrected generate_asset_for_scene_in_app call)
                prompt_to_edit_display_pop = st.session_state.project_scene_generation_prompts_list[i_loop_main_display] if i_loop_main_display < len(st.session_state.project_scene_generation_prompts_list) else "No prompt available."
                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 the visual asset:", key=f"visual_fb_input_pop_{widget_key_base_main_area}", height=150)
                if st.button(f"🔄 Update S{scene_num_for_display} Asset", key=f"regen_visual_btn_pop_{widget_key_base_main_area}"):
                    if feedback_for_visual_asset_regen_input:
                        with st.status(f"Refining prompt & regenerating 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[i_loop_main_display]['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: # IMAGE
                                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_loop_main_display] = 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 (Gemini) error: {e_gemini_refine_viz_pop}", exc_info=True); continue
                            else: # VIDEO
                                logger.info(f"Reconstructing video motion prompt for S{scene_num_for_display}. Feedback (indirect): {feedback_for_visual_asset_regen_input}")
                                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_loop_main_display] = 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/refinement 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_loop_main_display, st.session_state.project_story_treatment_scenes[i_loop_main_display], asset_ver_num=version_for_regenerated_visual_asset_pop, user_selected_asset_type_override=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("---")
    
    # Video Assembly Button Logic
    if st.session_state.project_story_treatment_scenes 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", type="primary", use_container_width=True): # Unique key
            with st.status("Assembling Ultra Animatic (this may take a few minutes)...", expanded=True) as status_video_assembly_final_op:
                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):
                    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.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.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.update(label="Ultra animatic assembled! 🎉", state="complete", expanded=False); st.balloons()
                    else: status_video_assembly_final_op.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.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: 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: final_video_bytes_for_display = final_video_file_obj_display.read()
            st.video(final_video_bytes_for_display, format="video/mp4") 
            st.download_button(label="Download Ultra Animatic", data=final_video_bytes_for_display, 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" )
        except Exception as e_final_video_display_op_main: st.error(f"Error displaying final animatic video: {e_final_video_display_op_main}"); logger.error(f"Error displaying final animatic video: {e_final_video_display_op_main}", exc_info=True)

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