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,           
    create_narration_script_prompt_enhanced, 
    create_scene_regeneration_prompt,   
    create_visual_regeneration_prompt   
)
import os
import logging # For better logging

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

# --- Global State Variables & API Key Setup ---
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. 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")
    
    if not st.session_state.GEMINI_API_KEY: 
        st.error("CRITICAL: Gemini API Key is essential and missing! Application cannot proceed."); logger.critical("Gemini API Key missing. Halting."); st.stop()
    
    try:
        st.session_state.gemini_handler = GeminiHandler(api_key=st.session_state.GEMINI_API_KEY)
        logger.info("GeminiHandler initialized successfully.")
    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:
        st.session_state.visual_engine = VisualEngine(output_dir="temp_cinegen_media")
        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)
        st.session_state.visual_engine.set_pexels_api_key(st.session_state.PEXELS_API_KEY)
        logger.info("VisualEngine initialized and API keys set (or attempted).")
    except Exception as e:
        st.error(f"Failed to init VisualEngine or set its API keys: {e}"); logger.critical(f"VisualEngine init/key setting failed: {e}", exc_info=True)
        st.warning("VisualEngine critical setup issue. Some features will be disabled.")
    st.session_state.services_initialized = True; logger.info("Service initialization sequence complete.")

for key, default_val in [
    ('story_treatment_scenes', []), ('scene_dalle_prompts', []), ('generated_visual_paths', []),
    ('video_path', None), ('character_definitions', {}), ('global_style_additions', ""),
    ('overall_narration_audio_path', None), ('narration_script_display', "")
]:
    if key not in st.session_state: st.session_state[key] = default_val

# --- Helper Functions ---
def initialize_new_project(): # Same
    st.session_state.story_treatment_scenes, st.session_state.scene_dalle_prompts, st.session_state.generated_visual_paths = [], [], []
    st.session_state.video_path, st.session_state.overall_narration_audio_path, st.session_state.narration_script_display = None, None, ""
    logger.info("New project initialized (session state cleared).")

def generate_visual_for_scene_core(scene_index, scene_data, version=1): # Same
    dalle_prompt = construct_dalle_prompt(scene_data, st.session_state.character_definitions, st.session_state.global_style_additions)
    if not dalle_prompt: logger.error(f"DALL-E prompt construction failed for scene {scene_data.get('scene_number', scene_index+1)}"); return False
    while len(st.session_state.scene_dalle_prompts) <= scene_index: st.session_state.scene_dalle_prompts.append("")
    while len(st.session_state.generated_visual_paths) <= scene_index: st.session_state.generated_visual_paths.append(None)
    st.session_state.scene_dalle_prompts[scene_index] = dalle_prompt
    filename = f"scene_{scene_data.get('scene_number', scene_index+1)}_visual_v{version}.png"
    img_path = st.session_state.visual_engine.generate_image_visual(dalle_prompt, scene_data, filename) 
    if img_path and os.path.exists(img_path):
        st.session_state.generated_visual_paths[scene_index] = img_path; logger.info(f"Visual generated for Scene {scene_data.get('scene_number', scene_index+1)}: {os.path.basename(img_path)}"); return True
    else:
        st.session_state.generated_visual_paths[scene_index] = None; logger.warning(f"Visual generation FAILED for Scene {scene_data.get('scene_number', scene_index+1)}. img_path was: {img_path}"); return False

# --- UI Sidebar ---
with st.sidebar:
    st.title("🎬 CineGen AI Ultra+")
    st.markdown("### Creative Seed")
    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=120, key="user_idea_main")
    genre = st.selectbox("Primary Genre:", ["Cyberpunk", "Sci-Fi", "Fantasy", "Noir", "Thriller", "Western", "Post-Apocalyptic", "Historical Drama", "Surreal"], index=6, key="genre_main")
    mood = st.selectbox("Overall Mood:", ["Hopeful yet Desperate", "Mysterious & Eerie", "Gritty & Tense", "Epic & Awe-Inspiring", "Melancholy & Reflective", "Whimsical & Lighthearted"], index=0, key="mood_main")
    num_scenes = st.slider("Number of Key Scenes:", 1, 3, 1, key="num_scenes_main")
    creative_guidance_options = {"Standard Director": "standard", "Artistic Visionary": "more_artistic", "Experimental Storyteller": "experimental_narrative"}
    selected_creative_guidance_key = st.selectbox("AI Creative Director Style:", options=list(creative_guidance_options.keys()), key="creative_guidance_select")
    actual_creative_guidance = creative_guidance_options[selected_creative_guidance_key]

    if st.button("🌌 Generate Cinematic Treatment", type="primary", key="generate_treatment_btn", use_container_width=True):
        initialize_new_project()
        if not user_idea.strip(): st.warning("Please provide a story idea.")
        else:
            with st.status("AI Director is envisioning your masterpiece...", expanded=True) as status:
                try:
                    status.write("Phase 1: Gemini crafting cinematic treatment... 📜"); logger.info("Phase 1: Cinematic Treatment Gen.")
                    treatment_prompt = create_cinematic_treatment_prompt(user_idea, genre, mood, num_scenes, actual_creative_guidance)
                    treatment_result_json = st.session_state.gemini_handler.generate_story_breakdown(treatment_prompt)
                    if not isinstance(treatment_result_json, list) or not treatment_result_json: raise ValueError("Gemini returned invalid scene list.")
                    st.session_state.story_treatment_scenes = treatment_result_json; num_gen_scenes = len(st.session_state.story_treatment_scenes)
                    st.session_state.scene_dalle_prompts = [""]*num_gen_scenes; st.session_state.generated_visual_paths = [None]*num_gen_scenes
                    logger.info(f"Phase 1 complete. {num_gen_scenes} scenes.")
                    status.update(label="Treatment complete! ✅ Generating visuals...", state="running")

                    status.write("Phase 2: Creating visuals (DALL-E/Pexels)... 🖼️"); logger.info("Phase 2: Visual Gen.")
                    visual_successes = 0
                    for i, sc_data in enumerate(st.session_state.story_treatment_scenes):
                        sc_num_log = sc_data.get('scene_number', i+1)
                        status.write(f"  Visual for Scene {sc_num_log}: {sc_data.get('scene_title','Untitled')}..."); logger.info(f"  Processing visual for Scene {sc_num_log}.")
                        if generate_visual_for_scene_core(i, sc_data, version=1): visual_successes += 1
                    
                    current_status_label_ph2 = "Visuals ready! "
                    next_step_state = "running"
                    if visual_successes == 0 and num_gen_scenes > 0: 
                        logger.error("Visual gen failed all scenes."); current_status_label_ph2 = "Visual gen FAILED for all scenes."; next_step_state="error"; 
                        status.update(label=current_status_label_ph2, state=next_step_state, expanded=True); st.stop()
                    elif visual_successes < num_gen_scenes: 
                        logger.warning(f"Visuals partial ({visual_successes}/{num_gen_scenes})."); current_status_label_ph2 = f"Visuals partially generated ({visual_successes}/{num_gen_scenes}). "
                    else: logger.info("All visuals OK.")
                    status.update(label=f"{current_status_label_ph2}Generating narration script...", state="running")
                    
                    status.write("Phase 3: Generating narration script... 🎤"); logger.info("Phase 3: Narration Script Gen.")
                    voice_style = st.session_state.get("selected_voice_style_for_generation", "cinematic_trailer")
                    narr_prompt = create_narration_script_prompt_enhanced(st.session_state.story_treatment_scenes, mood, genre, voice_style)
                    st.session_state.narration_script_display = st.session_state.gemini_handler.generate_image_prompt(narr_prompt)
                    logger.info("Narration script generated."); status.update(label="Narration script ready! Synthesizing voice...", state="running")
                    
                    status.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_label = "All components ready! Storyboard below. 🚀"
                    final_state_val = "complete"
                    if not st.session_state.overall_narration_audio_path:
                        final_label = f"{current_status_label_ph2}Storyboard ready (Voiceover skipped/failed)."
                        logger.warning("Voiceover was skipped or failed.")
                    else: logger.info("Voiceover generated successfully.")
                    status.update(label=final_label, state=final_state_val, expanded=False)

                except ValueError as ve: logger.error(f"ValueError: {ve}", exc_info=True); status.update(label=f"Input/Gemini response error: {ve}", state="error", expanded=True); 
                except Exception as e: logger.error(f"Unhandled Exception: {e}", exc_info=True); status.update(label=f"An unexpected error occurred: {e}", state="error", expanded=True);
    
    st.markdown("---"); st.markdown("### Fine-Tuning Options")
    with st.expander("Define Characters", expanded=False):
        char_name = st.text_input("Character Name", key="char_name_adv_ultra_v3"); char_desc = st.text_area("Visual Description", key="char_desc_adv_ultra_v3", height=100, placeholder="e.g., Jax: rugged male astronaut...")
        if st.button("Save Character", key="add_char_adv_ultra_v3"):
            if char_name and char_desc: st.session_state.character_definitions[char_name.strip().lower()] = char_desc.strip(); st.success(f"Char '{char_name.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):
        presets = { "Default (Director's Choice)": "", "Hyper-Realistic Gritty Noir": "hyper-realistic gritty neo-noir...", "Surreal Dreamscape Fantasy": "surreal dreamscape...", "Vintage Analog Sci-Fi": "70s analog sci-fi..."}
        sel_preset = st.selectbox("Base Style Preset:", options=list(presets.keys()), key="style_preset_adv_ultra_v3")
        custom_kw = st.text_area("Additional Custom Style Keywords:", key="custom_style_adv_ultra_v3", height=80, placeholder="e.g., 'Dutch angle'")
        cur_style = st.session_state.global_style_additions
        if st.button("Apply Global Styles", key="apply_styles_adv_ultra_v3"):
            final_s = presets[sel_preset]; 
            if custom_kw.strip(): final_s = f"{final_s}, {custom_kw.strip()}" if final_s else custom_kw.strip()
            st.session_state.global_style_additions = final_s.strip(); cur_style = final_s.strip()
            if cur_style: st.success("Global styles applied!")
            else: st.info("Global style additions cleared.")
        if cur_style: st.caption(f"Active global styles: \"{cur_style}\"")

    with st.expander("Voice Customization (ElevenLabs)", expanded=False):
        el_voices = ["Rachel", "Adam", "Bella", "Antoni", "Elli", "Josh", "Arnold", "Domi"] 
        engine_v_id = "Rachel"; 
        if hasattr(st.session_state, 'visual_engine') and st.session_state.visual_engine: engine_v_id = st.session_state.visual_engine.elevenlabs_voice_id
        try: cur_v_idx = el_voices.index(engine_v_id)
        except ValueError: cur_v_idx = 0 
        sel_el_voice = st.selectbox("Narrator Voice:", el_voices, index=cur_v_idx, key="el_voice_sel_ultra_v3")
        prompt_v_styles = {"Cinematic Trailer": "cinematic_trailer", "Neutral Documentary": "documentary_neutral", "Character Introspection": "introspective_character"}
        sel_prompt_v_style_key = st.selectbox("Narration Script Style:", list(prompt_v_styles.keys()), key="narr_style_sel_v3")
        if st.button("Set Narrator Voice & Style", key="set_voice_btn_ultra_v3"):
            if hasattr(st.session_state, 'visual_engine'): st.session_state.visual_engine.elevenlabs_voice_id = sel_el_voice
            st.session_state.selected_voice_style_for_generation = prompt_v_styles[sel_prompt_v_style_key]
            st.success(f"Narrator: {sel_el_voice}. Script Style: {sel_prompt_v_style_key}")


# --- 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, scene_content_display in enumerate(st.session_state.story_treatment_scenes):
        scene_n = scene_content_display.get('scene_number', i_main + 1); scene_t = scene_content_display.get('scene_title', 'Untitled')
        key_base = f"s{scene_n}_{''.join(filter(str.isalnum, scene_t[:10]))}_v3" # Added version to key_base for uniqueness
        if "director_note" in scene_content_display and scene_content_display['director_note']: st.info(f"🎬 Director Note S{scene_n}: {scene_content_display['director_note']}")
        st.subheader(f"SCENE {scene_n}: {scene_t.upper()}"); col_d, col_v = st.columns([0.45, 0.55])
        with col_d:
            with st.expander("📝 Scene Treatment", expanded=True):
                # ... (markdown display of scene details, same as before) ...
                st.markdown(f"**Beat:** {scene_content_display.get('emotional_beat', 'N/A')}"); st.markdown(f"**Setting:** {scene_content_display.get('setting_description', 'N/A')}"); st.markdown(f"**Chars:** {', '.join(scene_content_display.get('characters_involved', ['N/A']))}"); st.markdown(f"**Focus Moment:** _{scene_content_display.get('character_focus_moment', 'N/A')}_"); st.markdown(f"**Plot Beat:** {scene_content_display.get('key_plot_beat', 'N/A')}"); st.markdown(f"**Dialogue Hook:** `\"{scene_content_display.get('suggested_dialogue_hook', '...')}\"`"); st.markdown("---"); st.markdown(f"**Dir. Visual Style:** _{scene_content_display.get('PROACTIVE_visual_style_감독', 'N/A')}_"); st.markdown(f"**Dir. Camera:** _{scene_content_display.get('PROACTIVE_camera_work_감독', 'N/A')}_"); st.markdown(f"**Dir. Sound:** _{scene_content_display.get('PROACTIVE_sound_design_감독', 'N/A')}_")
                cur_d_prompt = st.session_state.scene_dalle_prompts[i_main] if i_main < len(st.session_state.scene_dalle_prompts) else None
                if cur_d_prompt:
                     with st.popover("👁️ DALL-E Prompt"): st.markdown(f"**DALL-E Prompt:**"); st.code(cur_d_prompt, language='text')
                pexels_q = scene_content_display.get('pexels_search_query_감독', None)
                if pexels_q: st.caption(f"Pexels Fallback Query: `{pexels_q}`")
        with col_v:
            cur_img_p = st.session_state.generated_visual_paths[i_main] if i_main < len(st.session_state.generated_visual_paths) else None
            if cur_img_p and os.path.exists(cur_img_p): st.image(cur_img_p, caption=f"Scene {scene_n}: {scene_t}", use_column_width='always') 
            else:
                if st.session_state.story_treatment_scenes: st.caption("Visual pending/failed.")
            
            with st.popover(f"✏️ Edit Scene {scene_n} Treatment"): 
                fb_script = st.text_area("Changes to treatment:", key=f"treat_fb_{key_base}", height=150) 
                if st.button(f"🔄 Update Scene {scene_n} Treatment", key=f"regen_treat_btn_{key_base}"): 
                    if fb_script:
                        with st.status(f"Updating Scene {scene_n}...", expanded=True) as s_treat_regen:
                            prompt_text = create_scene_regeneration_prompt(scene_content_display, fb_script, st.session_state.story_treatment_scenes)
                            try:
                                updated_sc_data = st.session_state.gemini_handler.regenerate_scene_script_details(prompt_text)
                                st.session_state.story_treatment_scenes[i_main] = updated_sc_data 
                                s_treat_regen.update(label="Treatment updated! Regenerating visual...", state="running")
                                v_num = 1
                                if cur_img_p and os.path.exists(cur_img_p): 
                                    try: b,_=os.path.splitext(os.path.basename(cur_img_p)); v_num = int(b.split('_v')[-1])+1 if '_v' in b else 2
                                    except: v_num = 2 
                                else: v_num = 1 
                                if generate_visual_for_scene_core(i_main, updated_sc_data, version=v_num): s_treat_regen.update(label="Treatment & Visual Updated! 🎉", state="complete", expanded=False)
                                else: s_treat_regen.update(label="Treatment updated, visual failed.", state="complete", expanded=False) 
                                st.rerun()
                            except Exception as e_regen: s_treat_regen.update(label=f"Error: {e_regen}", state="error"); logger.error(f"Scene treatment regen error: {e_regen}", exc_info=True)
                    else: st.warning("Please provide feedback.")

            with st.popover(f"🎨 Edit Scene {scene_n} Visual Prompt"): 
                d_prompt_edit = st.session_state.scene_dalle_prompts[i_main] if i_main < len(st.session_state.scene_dalle_prompts) else "No DALL-E prompt."
                st.caption("Current DALL-E Prompt:"); st.code(d_prompt_edit, language='text')
                fb_visual = st.text_area("Changes for DALL-E prompt:", key=f"visual_fb_{key_base}", height=150) 
                if st.button(f"🔄 Update Scene {scene_n} Visual", key=f"regen_visual_btn_{key_base}"): 
                    if fb_visual:
                        with st.status(f"Refining prompt & visual for Scene {scene_n}...", expanded=True) as s_visual_regen:
                            ref_req_prompt = create_visual_regeneration_prompt(d_prompt_edit, fb_visual, scene_content_display, 
                                st.session_state.character_definitions, st.session_state.global_style_additions)
                            try:
                                refined_d_prompt = st.session_state.gemini_handler.generate_image_prompt(ref_req_prompt)
                                st.session_state.scene_dalle_prompts[i_main] = refined_d_prompt 
                                s_visual_regen.update(label="DALL-E prompt refined! Regenerating visual...", state="running")
                                v_num = 1
                                if cur_img_p and os.path.exists(cur_img_p): 
                                    try: b,_=os.path.splitext(os.path.basename(cur_img_p)); v_num = int(b.split('_v')[-1])+1 if '_v' in b else 2
                                    except: v_num=2
                                else: v_num = 1
                                if generate_visual_for_scene_core(i_main, scene_content_display, version=v_num): s_visual_regen.update(label="Visual Updated! 🎉", state="complete", expanded=False)
                                else: s_visual_regen.update(label="Prompt refined, visual failed.", state="complete", expanded=False)
                                st.rerun()
                            except Exception as e_regen_vis: s_visual_regen.update(label=f"Error: {e_regen_vis}", state="error"); logger.error(f"Visual prompt regen error: {e_regen_vis}", exc_info=True)
                    else: st.warning("Please provide feedback.")
        st.markdown("---")
    
    # Video Generation Button & Display (same as previous)
    if st.session_state.story_treatment_scenes and any(p for p in st.session_state.generated_visual_paths if p is not None):
        if st.button("🎬 Assemble Narrated Cinematic Animatic", key="assemble_ultra_video_btn_v3", type="primary", use_container_width=True):
            with st.status("Assembling Ultra Animatic...", expanded=True) as status_vid:
                img_data_vid = []
                for i_v, sc_c in enumerate(st.session_state.story_treatment_scenes):
                    img_p_v = st.session_state.generated_visual_paths[i_v] if i_v < len(st.session_state.generated_visual_paths) else None
                    if img_p_v and os.path.exists(img_p_v):
                        img_data_vid.append({'path':img_p_v, 'scene_num':sc_c.get('scene_number',i_v+1), 'key_action':sc_c.get('key_plot_beat','')}); status_vid.write(f"Adding Scene {sc_c.get('scene_number', i_v + 1)} to video.")
                if img_data_vid:
                    status_vid.write("Calling video engine..."); st.session_state.video_path = st.session_state.visual_engine.create_video_from_images(
                        img_data_vid, overall_narration_path=st.session_state.overall_narration_audio_path,
                        output_filename="cinegen_ultra_animatic.mp4", duration_per_image=5, fps=24)
                    if st.session_state.video_path and os.path.exists(st.session_state.video_path): status_vid.update(label="Ultra animatic assembled! 🎉", state="complete", expanded=False); st.balloons()
                    else: status_vid.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.update(label="No valid images for video.", state="error", expanded=False); logger.warning("No valid images found for video assembly.")
    elif st.session_state.story_treatment_scenes: st.info("Generate visuals before assembling video.")

    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: video_bytes = vf_obj.read()
            st.video(video_bytes, format="video/mp4") 
            with open(st.session_state.video_path, "rb") as fp_dl:
                st.download_button(label="Download Ultra Animatic", data=fp_dl, file_name=os.path.basename(st.session_state.video_path), mime="video/mp4", use_container_width=True, key="download_ultra_video_btn_v3" )
        except Exception as e: st.error(f"Error displaying video: {e}"); logger.error(f"Error displaying video: {e}", exc_info=True)

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