import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent.parent))

from bolt_pet import config


def test_set_env_value_uncomments_existing_line(tmp_path, monkeypatch):
    (tmp_path / ".env").write_text("#MIC_DEVICE=\nOTHER=1\n", encoding="utf-8")
    monkeypatch.setattr(config, "HERE", tmp_path)

    config.set_env_value("MIC_DEVICE", "USB Mic")

    lines = (tmp_path / ".env").read_text(encoding="utf-8").splitlines()
    assert lines == ["MIC_DEVICE=USB Mic", "OTHER=1"]
    assert config.os.environ["MIC_DEVICE"] == "USB Mic"


def test_set_env_value_overwrites_existing_uncommented_line(tmp_path, monkeypatch):
    (tmp_path / ".env").write_text("MIC_DEVICE=Old Mic\n", encoding="utf-8")
    monkeypatch.setattr(config, "HERE", tmp_path)

    config.set_env_value("MIC_DEVICE", "New Mic")

    lines = (tmp_path / ".env").read_text(encoding="utf-8").splitlines()
    assert lines == ["MIC_DEVICE=New Mic"]


def test_set_env_value_appends_when_key_is_missing(tmp_path, monkeypatch):
    (tmp_path / ".env").write_text("OTHER=1\n", encoding="utf-8")
    monkeypatch.setattr(config, "HERE", tmp_path)

    config.set_env_value("MIC_DEVICE", "New Mic")

    lines = (tmp_path / ".env").read_text(encoding="utf-8").splitlines()
    assert lines == ["OTHER=1", "MIC_DEVICE=New Mic"]


def test_set_env_value_creates_file_if_missing(tmp_path, monkeypatch):
    monkeypatch.setattr(config, "HERE", tmp_path)

    config.set_env_value("MIC_DEVICE", "New Mic")

    assert (tmp_path / ".env").read_text(encoding="utf-8") == "MIC_DEVICE=New Mic\n"


def test_mic_device_parses_a_numeric_index_as_int():
    # sounddevice only takes an int index as-is; a string (even "1") goes
    # through substring matching against every device name instead, which is
    # not what a saved index means — see the tray's mic picker.
    assert config._mic_device("1") == 1
    assert isinstance(config._mic_device("1"), int)


def test_mic_device_keeps_a_name_as_a_string():
    assert config._mic_device("USB Mic") == "USB Mic"


def test_mic_device_blank_is_none():
    assert config._mic_device("") is None
    assert config._mic_device("   ") is None