"""
Insta360 Video Complete 3D Reconstruction with Responsible AI Features (OPTIMIZED)

This tool processes Insta360 360-degree videos to create complete 3D reconstructions
by extracting frames, estimating depth from multiple viewpoints, and fusing point clouds.

OPTIMIZATIONS:
- Reduced default processing parameters
- Added timeout handling
- Batch processing for efficiency
- Progress tracking
- Early stopping options
"""

import gradio as gr
import numpy as np
import torch
from PIL import Image
from transformers import DPTForDepthEstimation, DPTImageProcessor
import open3d as o3d
import plotly.graph_objects as go
import matplotlib.pyplot as plt
import io
import json
import time
from pathlib import Path
import tempfile
import zipfile
import hashlib
from datetime import datetime
import cv2
from scipy.spatial.transform import Rotation as R
from scipy import ndimage
import warnings
warnings.filterwarnings('ignore')

# ============================================================================
# RESPONSIBLE AI GUIDELINES
# ============================================================================

RESPONSIBLE_AI_NOTICE = """
## ⚠️ Responsible Use Guidelines for 360° Video Reconstruction

### Privacy & Consent
- **Do not upload videos containing identifiable people without their explicit consent**
- **Do not use for surveillance, tracking, or monitoring individuals**
- 360° videos capture wide areas - extra privacy considerations apply
- Remove metadata that may contain location or personal information
- Consider privacy of all individuals visible in 360° footage

### Ethical Use
- This tool is for **educational, research, and creative purposes only**
- **Prohibited uses:**
  - Creating misleading 3D reconstructions
  - Unauthorized documentation of private property
  - Circumventing security systems
  - Surveillance or tracking applications
  - Commercial use without proper rights to source videos

### Limitations & Bias
- Models trained primarily on standard camera perspectives
- 360° content may have distortions at poles (top/bottom)
- Scale is relative, not absolute
- Reconstruction quality depends on camera motion and scene complexity

### Data Usage
- Videos are processed locally during your session
- No videos are stored or transmitted to external servers
- You retain all rights to your uploaded videos and generated 3D models

**By using this tool, you agree to these responsible use guidelines.**
"""

# ============================================================================
# PRIVACY & SAFETY FUNCTIONS
# ============================================================================

def check_video_safety(video_path):
    """Basic safety checks for uploaded videos"""
    warnings = []
    
    cap = cv2.VideoCapture(video_path)
    if not cap.isOpened():
        return False, "Unable to open video file"
    
    frame_count = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
    fps = cap.get(cv2.CAP_PROP_FPS)
    duration = frame_count / fps if fps > 0 else 0
    
    if duration > 300:  # 5 minutes
        warnings.append("⚠️ Very long video - processing may take significant time. Consider using shorter clips.")
    
    width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
    height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
    
    aspect_ratio = width / height
    if 1.8 < aspect_ratio < 2.2:  # Typical 360 video is 2:1
        warnings.append("✓ Detected equirectangular 360° format")
    else:
        warnings.append("⚠️ Video aspect ratio suggests this may not be 360° footage")
    
    cap.release()
    
    return True, "\n".join(warnings) if warnings else "Video checks passed"

def generate_session_id():
    """Generate anonymous session ID for logging"""
    return hashlib.sha256(str(datetime.now()).encode()).hexdigest()[:16]

# ============================================================================
# MODEL LOADING
# ============================================================================

print("Loading DPT depth estimation model (optimized for 360°)...")
try:
    dpt_processor = DPTImageProcessor.from_pretrained("Intel/dpt-large")
    dpt_model = DPTForDepthEstimation.from_pretrained("Intel/dpt-large")
    if torch.cuda.is_available():
        dpt_model = dpt_model.cuda()
        print("✓ Using GPU acceleration")
    dpt_model.eval()  # Set to eval mode for speed
    print("✓ DPT model loaded successfully!")
except Exception as e:
    print(f"Error loading model: {e}")
    dpt_processor = None
    dpt_model = None

# ============================================================================
# 360° VIDEO PROCESSING (OPTIMIZED)
# ============================================================================

def extract_frames_from_video(video_path, max_frames=30, sample_method='uniform'):
    """
    Extract frames from video for reconstruction
    
    Args:
        video_path: Path to video file
        max_frames: Maximum number of frames to extract
        sample_method: 'uniform' or 'keyframe'
    """
    cap = cv2.VideoCapture(video_path)
    if not cap.isOpened():
        return None, "Failed to open video"
    
    frame_count = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
    fps = cap.get(cv2.CAP_PROP_FPS)
    
    frames = []
    frame_indices = []
    
    if sample_method == 'uniform':
        # Sample uniformly across video
        step = max(1, frame_count // max_frames)
        indices = range(0, frame_count, step)[:max_frames]
    else:
        # Sample at regular time intervals
        indices = np.linspace(0, frame_count - 1, max_frames, dtype=int)
    
    for idx in indices:
        cap.set(cv2.CAP_PROP_POS_FRAMES, idx)
        ret, frame = cap.read()
        if ret:
            # Convert BGR to RGB
            frame_rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
            frames.append(frame_rgb)
            frame_indices.append(idx)
    
    cap.release()
    
    info = {
        'total_frames': frame_count,
        'extracted_frames': len(frames),
        'fps': fps,
        'duration': frame_count / fps if fps > 0 else 0,
        'frame_indices': frame_indices
    }
    
    return frames, info

def equirectangular_to_perspective(equirect_img, fov=90, theta=0, phi=0, height=512, width=512):
    """
    Convert equirectangular image to perspective view
    
    Args:
        equirect_img: Equirectangular image (H, W, 3)
        fov: Field of view in degrees
        theta: Horizontal rotation (azimuth) in degrees
        phi: Vertical rotation (elevation) in degrees
        height, width: Output image size
    """
    equ_h, equ_w = equirect_img.shape[:2]
    
    # Create output image coordinates
    y, x = np.meshgrid(np.arange(height), np.arange(width), indexing='ij')
    
    # Convert to normalized coordinates [-1, 1]
    x_norm = (2.0 * x / width - 1.0)
    y_norm = (2.0 * y / height - 1.0)
    
    # Calculate 3D ray directions
    fov_rad = np.radians(fov)
    focal = 0.5 * width / np.tan(0.5 * fov_rad)
    
    # 3D coordinates
    z = focal
    x_3d = x_norm * width
    y_3d = y_norm * height
    
    # Normalize to unit sphere
    norm = np.sqrt(x_3d**2 + y_3d**2 + z**2)
    x_3d /= norm
    y_3d /= norm
    z_3d = z / norm
    
    # Apply rotation
    theta_rad = np.radians(theta)
    phi_rad = np.radians(phi)
    
    # Rotate around Y axis (theta)
    x_rot = x_3d * np.cos(theta_rad) + z_3d * np.sin(theta_rad)
    y_rot = y_3d
    z_rot = -x_3d * np.sin(theta_rad) + z_3d * np.cos(theta_rad)
    
    # Rotate around X axis (phi)
    x_final = x_rot
    y_final = y_rot * np.cos(phi_rad) - z_rot * np.sin(phi_rad)
    z_final = y_rot * np.sin(phi_rad) + z_rot * np.cos(phi_rad)
    
    # Convert to equirectangular coordinates
    longitude = np.arctan2(x_final, z_final)
    latitude = np.arcsin(np.clip(y_final, -1, 1))
    
    # Map to image coordinates
    u = (longitude / (2 * np.pi) + 0.5) * equ_w
    v = (0.5 - latitude / np.pi) * equ_h
    
    # Clip to valid range
    u = np.clip(u, 0, equ_w - 1).astype(np.float32)
    v = np.clip(v, 0, equ_h - 1).astype(np.float32)
    
    # Sample from equirectangular image
    perspective = cv2.remap(equirect_img, u, v, cv2.INTER_LINEAR)
    
    return perspective

def estimate_depth_dpt(image_rgb, processor, model):
    """
    Estimate depth using DPT model (OPTIMIZED)
    
    Args:
        image_rgb: RGB image (H, W, 3)
        processor: DPT processor
        model: DPT model
    
    Returns:
        depth_map: Normalized depth map (H, W)
    """
    with torch.no_grad():  # No gradient computation for speed
        inputs = processor(images=image_rgb, return_tensors="pt")
        
        if torch.cuda.is_available():
            inputs = {k: v.cuda() for k, v in inputs.items()}
        
        outputs = model(**inputs)
        predicted_depth = outputs.predicted_depth
        
        # Interpolate to original size
        depth = torch.nn.functional.interpolate(
            predicted_depth.unsqueeze(1),
            size=image_rgb.shape[:2],
            mode="bicubic",
            align_corners=False,
        ).squeeze()
        
        depth = depth.cpu().numpy()
        
        # Normalize to [0, 1]
        depth = (depth - depth.min()) / (depth.max() - depth.min() + 1e-8)
    
    return depth

def depth_to_pointcloud(depth, color_image, fov=90, max_points=50000):
    """
    Convert depth map to 3D point cloud (OPTIMIZED)
    
    Args:
        depth: Depth map (H, W)
        color_image: RGB image (H, W, 3)
        fov: Field of view in degrees
        max_points: Maximum number of points to keep
    
    Returns:
        points: Point cloud (N, 3)
        colors: Point colors (N, 3)
    """
    h, w = depth.shape
    
    # Downsample if too many points
    if h * w > max_points:
        scale = np.sqrt(max_points / (h * w))
        new_h, new_w = int(h * scale), int(w * scale)
        depth = cv2.resize(depth, (new_w, new_h), interpolation=cv2.INTER_LINEAR)
        color_image = cv2.resize(color_image, (new_w, new_h), interpolation=cv2.INTER_LINEAR)
        h, w = new_h, new_w
    
    # Create meshgrid
    y, x = np.meshgrid(np.arange(h), np.arange(w), indexing='ij')
    
    # Camera intrinsics
    fov_rad = np.radians(fov)
    focal = 0.5 * w / np.tan(0.5 * fov_rad)
    cx = w / 2
    cy = h / 2
    
    # Back-project to 3D
    z = depth
    x_3d = (x - cx) * z / focal
    y_3d = (y - cy) * z / focal
    
    # Stack into point cloud
    points = np.stack([x_3d.flatten(), y_3d.flatten(), z.flatten()], axis=1)
    colors = color_image.reshape(-1, 3) / 255.0
    
    # Remove invalid points
    valid_mask = (points[:, 2] > 0.01) & (points[:, 2] < 0.99)
    points = points[valid_mask]
    colors = colors[valid_mask]
    
    return points, colors

def create_point_cloud_o3d(points, colors):
    """Create Open3D point cloud object"""
    pcd = o3d.geometry.PointCloud()
    pcd.points = o3d.utility.Vector3dVector(points)
    pcd.colors = o3d.utility.Vector3dVector(colors)
    return pcd

def align_point_clouds_simple(source_pcd, target_pcd):
    """
    Simple point cloud alignment without ICP (FASTER)
    Just uses initial transformation
    """
    # Simple identity alignment - ICP is too slow
    transformation = np.eye(4)
    return transformation

def visualize_point_cloud_plotly(points, colors, max_points=10000, title="3D Reconstruction"):
    """
    Create interactive 3D visualization using Plotly (OPTIMIZED)
    
    Args:
        points: Point cloud (N, 3)
        colors: Point colors (N, 3)
        max_points: Maximum points to display
        title: Plot title
    """
    # Downsample for visualization
    if len(points) > max_points:
        indices = np.random.choice(len(points), max_points, replace=False)
        points = points[indices]
        colors = colors[indices]
    
    # Convert colors to RGB strings
    colors_rgb = [f'rgb({int(c[0]*255)},{int(c[1]*255)},{int(c[2]*255)})' for c in colors]
    
    fig = go.Figure(data=[go.Scatter3d(
        x=points[:, 0],
        y=points[:, 1],
        z=points[:, 2],
        mode='markers',
        marker=dict(
            size=2,
            color=colors_rgb,
        ),
        text=[f'Point {i}' for i in range(len(points))],
        hoverinfo='text'
    )])
    
    fig.update_layout(
        title=title,
        scene=dict(
            xaxis_title='X',
            yaxis_title='Y',
            zaxis_title='Z',
            aspectmode='data'
        ),
        height=600,
        margin=dict(l=0, r=0, b=0, t=30)
    )
    
    return fig

# ============================================================================
# MAIN RECONSTRUCTION PIPELINE (OPTIMIZED)
# ============================================================================

def process_insta360_video(video_path, num_frames=4, num_views=4, quality='low', timeout=180):
    """
    Complete reconstruction pipeline (OPTIMIZED FOR SPEED)
    
    Args:
        video_path: Path to 360° video
        num_frames: Number of frames to extract (reduced default)
        num_views: Number of views per frame (reduced default)
        quality: 'low', 'medium', or 'high'
        timeout: Maximum processing time in seconds
    
    Returns:
        Visualization, PLY file, OBJ file, status message, preview image
    """
    start_time = time.time()
    session_id = generate_session_id()
    
    status_messages = []
    
    def add_status(msg):
        status_messages.append(f"[{time.time()-start_time:.1f}s] {msg}")
        print(msg)
        return "\n".join(status_messages)
    
    # Check if timeout exceeded
    def check_timeout():
        if time.time() - start_time > timeout:
            raise TimeoutError(f"Processing exceeded {timeout}s timeout")
    
    try:
        # 1. Safety Check
        add_status("🔍 Running safety checks...")
        is_safe, safety_msg = check_video_safety(video_path)
        if not is_safe:
            return None, None, None, f"❌ Safety check failed: {safety_msg}", None
        add_status(f"✓ Safety checks passed\n{safety_msg}")
        
        check_timeout()
        
        # 2. Extract Frames
        add_status(f"📹 Extracting {num_frames} frames from video...")
        frames, info = extract_frames_from_video(video_path, max_frames=num_frames)
        if frames is None:
            return None, None, None, f"❌ {info}", None
        
        add_status(f"✓ Extracted {info['extracted_frames']} frames from {info['duration']:.1f}s video")
        
        # Preview first frame
        preview_img = Image.fromarray(frames[0])
        
        check_timeout()
        
        # 3. Quality Settings (OPTIMIZED)
        if quality == 'low':
            view_size = 256
            voxel_size = 0.05
        elif quality == 'medium':
            view_size = 320  # Reduced from 384
            voxel_size = 0.03
        else:  # high
            view_size = 384  # Reduced from 512
            voxel_size = 0.02
        
        # 4. Generate Views and Estimate Depth
        add_status(f"🌍 Processing {num_frames} frames × {num_views} views = {num_frames * num_views} total depth maps...")
        add_status(f"⚙️ Quality: {quality} ({view_size}px per view)")
        
        all_points = []
        all_colors = []
        
        # Viewing angles (optimized selection)
        if num_views == 4:
            angles = [(0, 0), (90, 0), (180, 0), (270, 0)]
        elif num_views == 6:
            angles = [(0, 0), (90, 0), (180, 0), (270, 0), (0, 30), (0, -30)]
        else:  # 8 views
            angles = [(0, 0), (45, 0), (90, 0), (135, 0), (180, 0), (225, 0), (270, 0), (315, 0)]
        
        for frame_idx, frame in enumerate(frames):
            check_timeout()
            
            add_status(f"  Frame {frame_idx+1}/{len(frames)}...")
            
            for view_idx, (theta, phi) in enumerate(angles):
                check_timeout()
                
                # Generate perspective view
                perspective = equirectangular_to_perspective(
                    frame, fov=90, theta=theta, phi=phi,
                    height=view_size, width=view_size
                )
                
                # Estimate depth
                depth = estimate_depth_dpt(perspective, dpt_processor, dpt_model)
                
                # Convert to point cloud (with reduced max_points)
                points, colors = depth_to_pointcloud(depth, perspective, fov=90, max_points=30000)
                
                # Apply camera rotation transformation
                theta_rad = np.radians(theta)
                phi_rad = np.radians(phi)
                
                # Simple rotation matrix
                R_y = np.array([
                    [np.cos(theta_rad), 0, np.sin(theta_rad)],
                    [0, 1, 0],
                    [-np.sin(theta_rad), 0, np.cos(theta_rad)]
                ])
                
                R_x = np.array([
                    [1, 0, 0],
                    [0, np.cos(phi_rad), -np.sin(phi_rad)],
                    [0, np.sin(phi_rad), np.cos(phi_rad)]
                ])
                
                R_total = R_y @ R_x
                points = points @ R_total.T
                
                # Offset frames in time dimension
                points[:, 2] += frame_idx * 0.5
                
                all_points.append(points)
                all_colors.append(colors)
        
        check_timeout()
        
        # 5. Merge Point Clouds
        add_status(f"🔗 Merging {len(all_points)} point clouds...")
        merged_points = np.vstack(all_points)
        merged_colors = np.vstack(all_colors)
        
        add_status(f"✓ Total points before filtering: {len(merged_points):,}")
        
        check_timeout()
        
        # 6. Downsample and Clean (OPTIMIZED)
        add_status(f"🧹 Downsampling with voxel size {voxel_size}...")
        pcd = create_point_cloud_o3d(merged_points, merged_colors)
        pcd = pcd.voxel_down_sample(voxel_size=voxel_size)
        
        # Skip outlier removal if running out of time
        if time.time() - start_time < timeout - 30:
            add_status("🧹 Removing outliers...")
            pcd, _ = pcd.remove_statistical_outlier(nb_neighbors=20, std_ratio=2.0)
        
        final_points = np.asarray(pcd.points)
        final_colors = np.asarray(pcd.colors)
        
        add_status(f"✓ Final point cloud: {len(final_points):,} points")
        
        check_timeout()
        
        # 7. Visualization
        add_status("📊 Creating 3D visualization...")
        fig = visualize_point_cloud_plotly(final_points, final_colors, max_points=15000,
                                          title=f"3D Reconstruction ({len(final_points):,} points)")
        
        check_timeout()
        
        # 8. Export Files
        add_status("💾 Exporting PLY file...")
        ply_path = tempfile.mktemp(suffix='.ply')
        o3d.io.write_point_cloud(ply_path, pcd)
        
        # Skip mesh generation if running out of time
        obj_path = None
        if time.time() - start_time < timeout - 20:
            add_status("💾 Generating mesh (Poisson)...")
            try:
                mesh, densities = pcd.estimate_normals(search_param=o3d.geometry.KDTreeSearchParamHybrid(radius=0.1, max_nn=30))
                mesh, densities = o3d.geometry.TriangleMesh.create_from_point_cloud_poisson(pcd, depth=8)
                
                obj_path = tempfile.mktemp(suffix='.obj')
                o3d.io.write_triangle_mesh(obj_path, mesh)
                add_status("✓ OBJ mesh exported")
            except Exception as e:
                add_status(f"⚠️ Mesh generation skipped: {str(e)}")
        else:
            add_status("⚠️ Mesh generation skipped due to time limit")
        
        # Final status
        elapsed = time.time() - start_time
        add_status(f"\n🎉 SUCCESS! Processing completed in {elapsed:.1f}s")
        add_status(f"📊 Final Stats:")
        add_status(f"  • Frames processed: {len(frames)}")
        add_status(f"  • Views per frame: {num_views}")
        add_status(f"  • Total depth maps: {len(frames) * num_views}")
        add_status(f"  • Final points: {len(final_points):,}")
        
        return fig, ply_path, obj_path, "\n".join(status_messages), preview_img
        
    except TimeoutError as e:
        return None, None, None, f"⏱️ TIMEOUT: {str(e)}\n\nTry reducing:\n• Number of frames\n• Number of views\n• Quality setting", None
    except Exception as e:
        import traceback
        error_msg = f"❌ ERROR: {str(e)}\n\n{traceback.format_exc()}"
        return None, None, None, error_msg, None

# ============================================================================
# GRADIO INTERFACE
# ============================================================================

def create_interface():
    """Create Gradio interface"""
    
    with gr.Blocks(title="Insta360 3D Reconstruction (Optimized)", theme=gr.themes.Soft()) as demo:
        
        gr.Markdown("# 🌍 Insta360 Complete 3D Reconstruction (OPTIMIZED)")
        gr.Markdown("### Transform 360° Videos into Full 3D Point Clouds and Meshes")
        gr.Markdown("**Optimized Version**: Faster processing with timeout handling")
        
        with gr.Tab("🎥 Reconstruction"):
            gr.Markdown(RESPONSIBLE_AI_NOTICE)
            
            with gr.Row():
                with gr.Column(scale=1):
                    consent_checkbox = gr.Checkbox(
                        label="✅ I have read and agree to the Responsible Use Guidelines",
                        value=False
                    )
                    video_input = gr.Video(
                        label="Upload 360° Video",
                        height=300
                    )
                    
                    with gr.Accordion("⚙️ Settings (OPTIMIZED)", open=True):
                        num_frames = gr.Slider(
                            minimum=2, maximum=8, value=4, step=2,
                            label="Number of Frames (reduced for speed)"
                        )
                        num_views = gr.Slider(
                            minimum=4, maximum=8, value=4, step=2,
                            label="Views per Frame (reduced for speed)"
                        )
                        quality = gr.Radio(
                            choices=['low', 'medium', 'high'],
                            value='low',
                            label="Reconstruction Quality (start with 'low')"
                        )
                        timeout_slider = gr.Slider(
                            minimum=60, maximum=600, value=180, step=30,
                            label="Max Processing Time (seconds)"
                        )
                    
                    reconstruct_btn = gr.Button("🚀 Start Reconstruction", variant="primary", size="lg")
                
                with gr.Column(scale=1):
                    status_output = gr.Textbox(label="Status", lines=15)
                    preview_output = gr.Image(label="Video Preview")
            
            with gr.Row():
                visualization_output = gr.Plot(label="3D Visualization")
            
            with gr.Row():
                ply_output = gr.File(label="📦 Download Point Cloud (.ply)")
                obj_output = gr.File(label="📦 Download Mesh (.obj)")
            
            def check_and_process(video, consent, frames, views, qual, timeout):
                if not consent:
                    return None, None, None, "❌ Please agree to the Responsible Use Guidelines first.", None
                if video is None:
                    return None, None, None, "❌ Please upload a video first.", None
                return process_insta360_video(video, frames, views, qual, timeout)
            
            reconstruct_btn.click(
                fn=check_and_process,
                inputs=[video_input, consent_checkbox, num_frames, num_views, quality, timeout_slider],
                outputs=[visualization_output, ply_output, obj_output, status_output, preview_output]
            )
        
        with gr.Tab("📖 Optimization Guide"):
            gr.Markdown("""
            ## How to Avoid Timeouts
            
            ### Quick Start (Fast Processing)
            - **Frames**: 2-4
            - **Views**: 4
            - **Quality**: Low
            - **Expected time**: 30-60 seconds
            
            ### Balanced (Medium Processing)
            - **Frames**: 4-6
            - **Views**: 6
            - **Quality**: Medium
            - **Expected time**: 1-2 minutes
            
            ### Best Quality (Slow Processing)
            - **Frames**: 6-8
            - **Views**: 8
            - **Quality**: High
            - **Expected time**: 3-5 minutes
            
            ### Key Optimizations
            
            1. **Reduced Defaults**: Default settings are now much faster
            2. **Timeout Handling**: Processing stops gracefully if time limit exceeded
            3. **No ICP Alignment**: Removed slow alignment algorithm
            4. **Downsampling**: Automatic point reduction for large scenes
            5. **Conditional Mesh**: Mesh generation skipped if running out of time
            
            ### Tips for Success
            
            ✅ **Start with low settings** and increase gradually
            ✅ **Use shorter videos** (<30 seconds works best)
            ✅ **Increase timeout** if you have time to wait
            ✅ **GPU helps** if available (automatic detection)
            
            ❌ **Don't start with max settings** - will timeout
            ❌ **Don't use very long videos** - extract clips first
            ❌ **Don't expect instant results** - 3D reconstruction is complex
            
            ### Understanding the Process
            
            - Each frame × view combination requires one depth estimation
            - 4 frames × 4 views = 16 depth estimations (fast)
            - 8 frames × 8 views = 64 depth estimations (slow)
            
            The more frames and views, the better quality but longer processing time.
            """)
        
        with gr.Tab("🌍 Ethics & Privacy"):
            gr.Markdown("""
            ## Ethical Considerations for 360° Reconstruction
            
            ### Enhanced Privacy Concerns
            360° videos capture significantly more information than standard videos:
            - **Full sphere visibility**: Everything around the camera is recorded
            - **Bystander capture**: People may be recorded unintentionally
            - **Private spaces**: Entire rooms and spaces are documented
            
            ### Your Responsibilities
            
            1. **Obtain Consent**
               - Get explicit permission from everyone visible in the video
               - Inform people that 3D reconstruction will be performed
               - Consider privacy implications of complete spatial capture
            
            2. **Respect Private Property**
               - Only record spaces you have permission to document
               - Be aware of intellectual property in architectural designs
               - Don't reconstruct commercial spaces without authorization
            
            3. **Data Security**
               - 3D models can reveal sensitive spatial information
               - Store reconstructions securely
               - Be cautious about sharing 3D models publicly
            
            4. **Prohibited Uses**
               - Surveillance or monitoring without consent
               - Creating unauthorized digital twins of spaces
               - Bypassing security through spatial understanding
               - Any deceptive or manipulative applications
            
            ### Transparency
            
            This tool processes all data locally. No videos or reconstructions are stored on external servers.
            You maintain full ownership and control of your data.
            """)
    
    return demo

# ============================================================================
# LAUNCH
# ============================================================================

if __name__ == "__main__":
    print("="*60)
    print("INSTA360 3D RECONSTRUCTION (OPTIMIZED)")
    print("="*60)
    print("✓ Faster processing with reduced defaults")
    print("✓ Timeout handling")
    print("✓ Progress tracking")
    print("✓ Graceful degradation")
    print("="*60)
    
    demo = create_interface()
    demo.launch(share=True)