import yaml
import os

def check_dir(directory):
    for root, dirs, files in os.walk(directory):
        for file in files:
            if file.endswith(".yaml"):
                path = os.path.join(root, file)
                
                with open(path, 'r') as f:
                    lines = f.readlines()
                    
                # Store (indentation, key) to check for duplicates in the current block
                # This is complex to implement perfectly for YAML, but we can look for
                # "related_mappings:" specifically.
                
                related_mappings_indices = [i for i, line in enumerate(lines) if "related_mappings:" in line.strip()]
                
                if len(related_mappings_indices) > 1:
                    # Check indentation
                    indents = [len(lines[i]) - len(lines[i].lstrip()) for i in related_mappings_indices]
                    
                    for i in range(len(related_mappings_indices) - 1):
                        idx1 = related_mappings_indices[i]
                        idx2 = related_mappings_indices[i+1]
                        indent1 = indents[i]
                        indent2 = indents[i+1]
                        
                        if indent1 == indent2:
                            # Check if there is a line between them with LOWER indentation (parent key)
                            parent_found = False
                            for j in range(idx1 + 1, idx2):
                                line = lines[j]
                                if line.strip() and not line.strip().startswith('#'):
                                    curr_indent = len(line) - len(line.lstrip())
                                    if curr_indent < indent1:
                                        parent_found = True
                                        break
                            
                            if not parent_found:
                                print(f"Potential duplicate related_mappings in {path} at lines {idx1+1} and {idx2+1}")

check_dir("schemas/20251121/linkml/modules/classes")