"""
Text Texture Generation Engine
Core functionality for generating texture images with text overlays.
"""

import bpy

def generate_texture_image(props, width, height):
    """
    Generate the actual texture image with overlays.
    
    Args:
        props: Text texture properties object
        width: Target image width in pixels
        height: Target image height in pixels
        
    Returns:
        tuple: (diffuse_image, normal_map_image) or (diffuse_image, None) if normal map disabled
        Returns (None, None) on error
    """
    try:
        print(f"[TTG DEBUG] Generating texture image at {width}x{height}px")
        
        # TODO: Implement actual texture generation logic
        # This is a minimal stub to resolve the import error
        # The full implementation should include:
        # - Background color/image handling
        # - Text overlay processing and rendering
        # - Normal map generation if enabled
        # - Image composition and final output
        
        # For now, create a basic placeholder image
        import numpy as np
        
        # Create a basic colored image as placeholder
        image_data = np.ones((height, width, 4), dtype=np.float32)
        image_data[:, :, 0] = props.background_color[0]  # R
        image_data[:, :, 1] = props.background_color[1]  # G
        image_data[:, :, 2] = props.background_color[2]  # B
        image_data[:, :, 3] = 1.0  # A
        
        # Create Blender image
        img_name = f"TextTexture_{width}x{height}"
        if img_name in bpy.data.images:
            bpy.data.images.remove(bpy.data.images[img_name])
        
        blender_img = bpy.data.images.new(img_name, width, height, alpha=True)
        blender_img.pixels[:] = image_data.flatten()
        blender_img.pack()
        
        # Generate normal map if enabled
        normal_map_img = None
        if props.enable_normal_map:
            from ..core.normal_maps import generate_normal_map_from_alpha
            normal_map_img = generate_normal_map_from_alpha(
                blender_img, 
                props.normal_map_strength,
                props.normal_map_blur_radius,
                props.invert_normal_map
            )
        
        print(f"[TTG DEBUG] Texture generation completed successfully")
        return blender_img, normal_map_img
        
    except Exception as e:
        print(f"[TTG ERROR] Failed to generate texture image: {e}")
        import traceback
        traceback.print_exc()
        return None, None

def generate_preview(props, preview_width=512, preview_height=512):
    """
    Generate a preview version of the texture at lower resolution.
    
    Args:
        props: Text texture properties object
        preview_width: Preview image width (default: 512)
        preview_height: Preview image height (default: 512)
        
    Returns:
        Blender image object or None on error
    """
    try:
        print(f"[TTG DEBUG] Generating preview at {preview_width}x{preview_height}px")
        
        # Generate at preview resolution
        result = generate_texture_image(props, preview_width, preview_height)
        if result and result[0]:
            preview_img = result[0]
            print(f"[TTG DEBUG] Preview generation completed successfully")
            return preview_img
        else:
            print(f"[TTG ERROR] Preview generation failed")
            return None
            
    except Exception as e:
        print(f"[TTG ERROR] Failed to generate preview: {e}")
        import traceback
        traceback.print_exc()
        return None