import xml.etree.ElementTree as ET

from PIL import Image, ImageDraw, ImageFont

from typing import Tuple

def find_leaf_nodes(xlm_file_str):
    if not xlm_file_str:
        return []

    root = ET.fromstring(xlm_file_str)

    # Recursive function to traverse the XML tree and collect leaf nodes
    def collect_leaf_nodes(node, leaf_nodes):
        # If the node has no children, it is a leaf node, add it to the list
        if not list(node):
            leaf_nodes.append(node)
        # If the node has children, recurse on each child
        for child in node:
            collect_leaf_nodes(child, leaf_nodes)

    # List to hold all leaf nodes
    leaf_nodes = []
    collect_leaf_nodes(root, leaf_nodes)
    return leaf_nodes


def filter_nodes(nodes):
    filtered_nodes = []

    for node in nodes:
        if not node.get('{uri:deskat:state.at-spi.gnome.org}visible', None) == 'true':
            # Not visible
            continue
        # Check if the node is a 'panel'
        if node.tag == 'panel':
            # Check if the 'panel' represents an interactive element
            # or if it has certain attributes that are of interest.
            # Add your conditions here...
            if node.get('{uri:deskat:state.at-spi.gnome.org}focusable', 'false') == 'true':
                filtered_nodes.append(node)
        elif node.tag == 'text':
            continue
        elif node.get("name") == "" and node.text is None:
            continue
        else:
            coords = tuple(
                map(int, node.attrib.get('{uri:deskat:component.at-spi.gnome.org}screencoord').strip('()').split(', ')))
            if coords[0] < 0 or coords[1] < 0:
                continue
            size = tuple(
                map(int, node.attrib.get('{uri:deskat:component.at-spi.gnome.org}size').strip('()').split(', ')))
            if size[0] <= 0 or size[1] <= 0:
                continue
            # Node is not a 'panel', add to the list.
            filtered_nodes.append(node)

    return filtered_nodes


def draw_bounding_boxes(nodes, image_file_path, output_image_file_path):
    # Load the screenshot image
    image = Image.open(image_file_path)
    draw = ImageDraw.Draw(image)
    marks = []
    drew_nodes = []

    try:
        # Adjust the path to the font file you have or use a default one
        font = ImageFont.truetype("arial.ttf", 15)
    except IOError:
        # Fallback to a basic font if the specified font can't be loaded
        font = ImageFont.load_default()

    index = 1

    # Loop over all the visible nodes and draw their bounding boxes
    for _node in nodes:
        coords_str = _node.attrib.get('{uri:deskat:component.at-spi.gnome.org}screencoord')
        size_str = _node.attrib.get('{uri:deskat:component.at-spi.gnome.org}size')

        if coords_str and size_str:
            try:
                # Parse the coordinates and size from the strings
                coords = tuple(map(int, coords_str.strip('()').split(', ')))
                size = tuple(map(int, size_str.strip('()').split(', ')))

                # Check for negative sizes
                if size[0] <= 0 or size[1] <= 0:
                    raise ValueError(f"Size must be positive, got: {size}")

                # Calculate the bottom-right corner of the bounding box
                bottom_right = (coords[0] + size[0], coords[1] + size[1])

                # Check that bottom_right > coords (x1 >= x0, y1 >= y0)
                if bottom_right[0] < coords[0] or bottom_right[1] < coords[1]:
                    raise ValueError(f"Invalid coordinates or size, coords: {coords}, size: {size}")

                # Check if the area only contains one color
                cropped_image = image.crop((*coords, *bottom_right))
                if len(set(list(cropped_image.getdata()))) == 1:
                    continue

                # Draw rectangle on image
                draw.rectangle([coords, bottom_right], outline="red", width=1)

                # Draw index number at the bottom left of the bounding box with black background
                text_position = (coords[0], bottom_right[1])  # Adjust Y to be above the bottom right
                text_bbox: Tuple[int, int ,int ,int] = draw.textbbox(text_position, str(index), font=font, anchor="lb")
                #offset: int = bottom_right[1]-text_bbox[3]
                #text_bbox = (text_bbox[0], text_bbox[1]+offset, text_bbox[2], text_bbox[3]+offset)

                #draw.rectangle([text_position, (text_position[0] + 25, text_position[1] + 18)], fill='black')
                draw.rectangle(text_bbox, fill='black')
                draw.text(text_position, str(index), font=font, anchor="lb", fill="white")
                index += 1

                # each mark is an x, y, w, h tuple
                marks.append([coords[0], coords[1], size[0], size[1]])
                drew_nodes.append(_node)

            except ValueError:
                pass

    # Save the result
    image.save(output_image_file_path)
    return marks, drew_nodes


def print_nodes_with_indent(nodes, indent=0):
    for node in nodes:
        print(' ' * indent, node.tag, node.attrib)
        print_nodes_with_indent(node, indent + 2)


if __name__ == '__main__':
    with open('chrome_desktop_example_1.xml', 'r', encoding='utf-8') as f:
        xml_file_str = f.read()
    filtered_nodes = filter_nodes(find_leaf_nodes(xml_file_str))
    print(len(filtered_nodes))
    masks = draw_bounding_boxes(filtered_nodes, 'screenshot.png',
                                'chrome_desktop_example_1_tagged_remove.png', )

    # print(masks)
    print(len(masks))