import importlib.util
from pathlib import Path
import unittest
import tempfile
import json
from unittest.mock import patch

spec = importlib.util.spec_from_file_location("desktop", Path(__file__).parents[1] / "vm/desktop.py")
desktop = importlib.util.module_from_spec(spec)
spec.loader.exec_module(desktop)


class ValidationTests(unittest.TestCase):
    def test_session_save(self):
        with tempfile.TemporaryDirectory() as directory:
            state = Path(directory)
            with patch.object(desktop, "STATE", state):
                desktop.save_session({"DISPLAY": ":0"})
                desktop.save_session({"DISPLAY": ":1"})
            path = state / "session.json"
            self.assertEqual(json.loads(path.read_text()), {"DISPLAY": ":1"})
            self.assertEqual(path.stat().st_mode & 0o777, 0o600)
            self.assertEqual(len(list(state.iterdir())), 1)

    def test_autostart(self):
        with tempfile.TemporaryDirectory() as directory:
            with patch.object(Path, "home", return_value=Path(directory)):
                desktop.install_autostart()
                desktop.install_autostart()
            entries = list((Path(directory) / ".config/autostart").iterdir())
            self.assertEqual(len(entries), 1)
            self.assertIn("--register-session\n", entries[0].read_text())
            self.assertIn("OnlyShowIn=XFCE;", entries[0].read_text())

    def test_normalized_coordinates(self):
        for value, expected in [(0, (0, 0)), (500, (640, 400)), (1000, (1279, 799))]:
            self.assertEqual(desktop.click_pixels({"x": value, "y": value}, 1280, 800, "normalized_1000"), expected)
        self.assertEqual(desktop.click_pixels({"x": 1000, "y": 1000}, 1, 1, "normalized_1000"), (0, 0))
        self.assertEqual(desktop.click_pixels({"x": 480, "y": 425}, 1280, 800, "pixels"), (480, 425))
        for value in (-1, 1001, 0.5, True):
            with self.assertRaises(ValueError):
                desktop.click_pixels({"x": value, "y": 0}, 1280, 800, "normalized_1000")

    def test_invalid_coordinate_space(self):
        with self.assertRaises(ValueError):
            desktop.validate({"actions": [], "coordinateSpace": "guess"}, 1280, 800)

    def test_capture(self):
        self.assertEqual(desktop.validate({"actions": []}, 100, 100), [])

    def test_bounds(self):
        for x in (-1, 100, True, "2"):
            with self.assertRaises(ValueError):
                desktop.validate({"actions": [{"type": "click", "x": x, "y": 0}]}, 100, 100)

    def test_invalid_keys(self):
        with self.assertRaises(ValueError):
            desktop.validate({"actions": [{"type": "keys", "keys": ["--repeat"]}]}, 100, 100)

    def test_wait_budget(self):
        with self.assertRaises(ValueError):
            desktop.validate({"actions": [{"type": "wait", "milliseconds": 3000}] * 2}, 100, 100)


if __name__ == "__main__":
    unittest.main()