import sys
from unittest.mock import patch, MagicMock

# Mock tkinter and other GUI/macOS specific imports before they are imported in install.py
sys.modules['tkinter'] = MagicMock()
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 install.py after mocking
import install
from install import ProleInstaller

@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 ProleInstaller.__init__ because it creates GUI elements
        with patch.object(ProleInstaller, '__init__', return_value=None):
            ins = ProleInstaller()
            return ins

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

def test_resolve_prole_home_env(installer):
    custom_home = "/tmp/custom_prole"
    with patch.dict(os.environ, {'PROLE_HOME': custom_home}):
        home = installer.resolve_prole_home()
        assert str(home) == custom_home

def test_env_defaults(installer):
    defaults = installer._env_defaults()
    assert 'PROLE_HOME' in defaults
    assert defaults['PROLE_HOME'].endswith('.prole')
    assert defaults['PROLE_CONF'].endswith('.prole/conf')

def test_read_existing_env_no_file(installer, tmp_path):
    # Ensure neither PROLE_HOME nor the default location has an env.sh for this test
    with patch.dict(os.environ, {'PROLE_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, {'PROLE_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"