import sys
import re
import os

def promote_task(file_path, project_id):
    if not os.path.exists(file_path):
        print(f"Error: {file_path} not found")
        return
        
    with open(file_path, 'r') as f:
        lines = f.readlines()

    in_project = False
    project_level = 0
    updated = False

    for i, line in enumerate(lines):
        # 1. Identify project
        if f":ID:       {project_id}" in line:
            in_project = True
            # Find the nearest parent headline to get the level
            for j in range(i, -1, -1):
                m = re.match(r'^(\*+) ', lines[j])
                if m:
                    project_level = len(m.group(1))
                    break
            continue
        
        if in_project:
            # Check if we exited project by hitting a headline of same or higher level
            headline_match = re.match(r'^(\*+) ', line)
            if headline_match and len(headline_match.group(1)) <= project_level:
                in_project = False
                break
            
            # 2. Find first available TODO to promote
            if re.match(r'^\*+ TODO ', line) and not updated:
                lines[i] = line.replace("TODO ", "NEXT ", 1)
                updated = True
                print(f"Promoted: {lines[i].strip()}")

    if updated:
        with open(file_path, 'w') as f:
            f.writelines(lines)
    else:
        print(f"No TODO found to promote in project {project_id}")

if __name__ == "__main__":
    if len(sys.argv) < 3:
        print("Usage: promote_task.py <file_path> <project_id>")
    else:
        promote_task(sys.argv[1], sys.argv[2])