"""The custom launcher icon store and the picture-crop geometry.

Both are plain java.io / arithmetic, so they run on a desktop JVM; the Android side (picking a photo,
pinning the shortcut) is checked on the phone.
"""

import os
from pathlib import Path
import shutil
import subprocess
import tempfile
import unittest

ROOT = Path(__file__).resolve().parents[1]
PACKAGE = ROOT / "src" / "lihont" / "two" / "settings"
HARNESS = ROOT / "tests" / "java" / "lihont" / "two" / "settings" / "IconStoreTest.java"


class CustomIconTest(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        cls.javac = shutil.which("javac")
        cls.java = shutil.which("java")
        if not cls.javac or not cls.java:
            raise RuntimeError("These tests require a JDK with java and javac")
        cls.temporary = tempfile.TemporaryDirectory(prefix="lihont-custom-icon-tests-")
        cls.addClassCleanup(cls.temporary.cleanup)
        cls.classes = Path(cls.temporary.name)
        cls.environment = dict(os.environ)
        cls.environment.pop("JAVA_TOOL_OPTIONS", None)
        cls.run_command([
            cls.javac, "--release", "17", "-encoding", "UTF-8", "-nowarn", "-Xlint:-options",
            "-d", str(cls.classes),
            str(PACKAGE / "IconCrop.java"), str(PACKAGE / "CustomIconStore.java"), str(HARNESS),
        ])

    @classmethod
    def run_command(cls, command):
        result = subprocess.run(
            command, capture_output=True, text=True, encoding="utf-8",
            env=cls.environment, timeout=60,
        )
        if result.returncode:
            raise AssertionError(
                f"Command failed with exit {result.returncode}: {command[0]}\n" + result.stdout + result.stderr)
        return result

    def run_scenario(self, name):
        result = self.run_command([
            self.java, "-cp", str(self.classes), "lihont.two.settings.IconStoreTest", name])
        self.assertEqual(result.stdout.strip(), "PASS " + name)

    def test_the_photo_is_cut_to_the_centre_square(self):
        self.run_scenario("crop")

    def test_names_and_ids_are_cleaned(self):
        self.run_scenario("names")

    def test_icons_are_stored_listed_capped_and_removed(self):
        self.run_scenario("store")

    def test_a_damaged_index_is_survived(self):
        self.run_scenario("damaged")


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