import sys, os
import xml.etree.ElementTree as ET
from assethelpers import getAssetRelativePath

def processTileset(assetPath):
  # Process the tileset file
  print(f"Processing tileset: {assetPath}")

  # Load the tileset XML
  tree = ET.parse(assetPath)
  root = tree.getroot()

  # Needs tilewidth, tileheight, tilecount and columns attributes
  if not all(attr in root.attrib for attr in ['tilewidth', 'tileheight', 'tilecount', 'columns']):
    print(f"Error: Tileset {assetPath} is missing required attributes.")
    return
  
  tilewidth = int(root.attrib.get('tilewidth', 0))
  tileheight = int(root.attrib.get('tileheight', 0))
  tilecount = int(root.attrib.get('tilecount', 0))
  columns = int(root.attrib.get('columns', 0))
  
  if tilewidth <= 0 or tileheight <= 0 or tilecount <= 0 or columns <= 0:
    print(f"Error: Tileset {assetPath} has invalid attribute values.")
    return

  # Exactly one image element is required
  images = root.findall('image')
  if len(images) != 1:
    print(f"Error: Tileset {assetPath} must have exactly one image element.")
    return

  image = images[0]
  if 'source' not in image.attrib:
    print(f"Error: Tileset {assetPath} is missing image source.")
    return
  
  imageSource = image.attrib['source']

  # Build 
  relative = getAssetRelativePath(assetPath)
  print(f"Relative path: {relative}")