"""Unit test for config.set_config_value (replaces, doesn't merge)."""
from __future__ import annotations

import yaml

from presa_mano.config import (
    set_config_value,
    get_config,
    load_config,
    _STATE,
    _default_config_path,
)


def test_replace_nested_dict_removes_old_keys(tmp_path, monkeypatch):
    cfg_file = tmp_path / "cfg.yaml"
    cfg_file.write_text(yaml.safe_dump({
        "section": {"items": {"a": 1, "b": 2}},
    }))
    monkeypatch.setenv("PRESA_MANO_CONFIG", str(cfg_file))
    # Reset in-memory singleton
    _STATE["config"] = None
    _STATE["path"] = None
    load_config()

    set_config_value(["section", "items"], {"c": 3})

    out = get_config()
    assert out["section"]["items"] == {"c": 3}
    # File on disk also updated
    on_disk = yaml.safe_load(cfg_file.read_text())
    assert on_disk["section"]["items"] == {"c": 3}


def test_create_intermediate_dicts(tmp_path, monkeypatch):
    cfg_file = tmp_path / "cfg.yaml"
    cfg_file.write_text(yaml.safe_dump({}))
    monkeypatch.setenv("PRESA_MANO_CONFIG", str(cfg_file))
    _STATE["config"] = None
    _STATE["path"] = None
    load_config()

    set_config_value(["a", "b", "c"], 42)

    assert get_config() == {"a": {"b": {"c": 42}}}