#!/usr/bin/env python3

import json
from app.common import bash_wrapper
import shutil

def traverse_json_base(json_dict:dict ,path: list[str]):
    final_paths = []
    for (key,value) in json_dict.items():
        if isinstance(value,dict):
            keys = value.keys()
            if 'type' in keys and value['type'] in ['nixos-configuration','derivation']:
                final_paths += ['.'.join(path + [key])]
            else:
                final_paths += traverse_json_base(value,path+[key])
    return final_paths


def traverse_json(json_dict: dict):
    return traverse_json_base(json_dict,[])

def get_derivations(path_to_flake: str):
    nix_path = shutil.which("nix")
    flake_show = bash_wrapper(f"{nix_path} flake show --json", path = path_to_flake)
    if flake_show[1] != 0:
        raise RuntimeError("flake show returned non-zero exit code")
    flake_show_json = json.loads(flake_show[0])
    derivations = traverse_json(flake_show_json)
    return derivations