import sys
from unittest.mock import patch, MagicMock

# Mock tkinter and other GUI/macOS specific imports before they are imported in install.py
mock_tk = MagicMock()
mock_tk.Entry.return_value.get.return_value.strip.return_value = "mock_val"
mock_tk.StringVar.return_value.get.return_value.strip.return_value = "mock_val"
sys.modules["tkinter"] = mock_tk
sys.modules["tkinter.ttk"] = MagicMock()
sys.modules["tkinter.scrolledtext"] = MagicMock()
sys.modules["tkinter.messagebox"] = MagicMock()
sys.modules["Foundation"] = MagicMock()
sys.modules["objc"] = MagicMock()

import os
import pytest
from pathlib import Path

# Now import after mocking
from knoe.ui.screens import KnoeInstaller


@pytest.fixture
def installer(tmp_path):
    # Mocking os.environ to avoid messing with real env
    with patch.dict(os.environ, {}, clear=True):
        # We need to mock KnoeInstaller.__init__ because it creates GUI elements
        with patch.object(KnoeInstaller, "__init__", return_value=None):
            ins = KnoeInstaller()
            # Core helpers expect `inputs` to exist; bypassing `__init__` means
            # we must seed minimal state for method calls.
            ins.inputs = {}
            return ins


def test_resolve_knoe_home_default(installer):
    with patch.dict(os.environ, {}, clear=True):
        # Path.home() might vary, so we just check it ends with .knoe if no env var
        home = installer.resolve_knoe_home()
        assert home.name == ".knoe"


def test_resolve_knoe_home_env(installer):
    custom_home = "/tmp/custom_knoe"
    with patch.dict(os.environ, {"KNOE_HOME": custom_home}):
        home = installer.resolve_knoe_home()
        assert str(home) == custom_home


def test_env_defaults(installer):
    with patch.dict(os.environ, {}, clear=True), patch.object(
        installer, "_read_existing_env", return_value={}
    ):
        defaults = installer._env_defaults()
        assert "KNOE_HOME" in defaults
        assert defaults["KNOE_HOME"].endswith(".knoe")
        assert defaults["KNOE_CONF"].endswith(".knoe/conf")


def test_read_existing_env_no_file(installer, tmp_path):
    # Ensure neither KNOE_HOME nor the default location has an env.sh for this test
    with patch.dict(os.environ, {"KNOE_HOME": str(tmp_path)}):
        with patch("pathlib.Path.home", return_value=tmp_path / "fake_home"):
            env = installer._read_existing_env()
            assert env == {}


def test_read_existing_env_with_file(installer, tmp_path):
    env_sh = tmp_path / "env.sh"
    env_sh.write_text('export VAR1="val1"\nVAR2=val2\n# comment\n')

    with patch.dict(os.environ, {"KNOE_HOME": str(tmp_path)}):
        with patch("pathlib.Path.home", return_value=tmp_path / "fake_home"):
            env = installer._read_existing_env()
            assert env.get("VAR1") == "val1"
            assert env.get("VAR2") == "val2"