"""Prevent packaging a new GUI with a stale native DSView component."""
import hashlib
import importlib.util
import json
from pathlib import Path
import tempfile
import unittest
from unittest.mock import patch

RECIPE = Path(__file__).resolve().parents[1] / 'build.py'
SPEC = importlib.util.spec_from_file_location('dsview_runtime_build', RECIPE)
BUILD = importlib.util.module_from_spec(SPEC)
SPEC.loader.exec_module(BUILD)


class RuntimeTests(unittest.TestCase):
    def test_legacy_runtime_and_mismatched_binary_or_recipe_require_rebuild(self):
        with tempfile.TemporaryDirectory() as temporary:
            output = Path(temporary)
            (output / 'DSView.exe').write_bytes(b'native fixture')
            (output / 'host-protocol-1').write_text('DSView host protocol 1\n')
            self.assertFalse(BUILD.runtime_is_current(output))
            stamp = {'recipe': 'new', 'executable': hashlib.sha256(b'native fixture').hexdigest()}
            (output / 'host-build.json').write_text(json.dumps(stamp))
            with patch.object(BUILD, 'recipe_digest', return_value='new'):
                self.assertTrue(BUILD.runtime_is_current(output))
                (output / 'DSView.exe').write_bytes(b'old native fixture')
                self.assertFalse(BUILD.runtime_is_current(output))
            (output / 'DSView.exe').write_bytes(b'native fixture')
            with patch.object(BUILD, 'recipe_digest', return_value='changed'):
                self.assertFalse(BUILD.runtime_is_current(output))
            (output / 'host-build.json').write_text('partial JSON')
            self.assertFalse(BUILD.runtime_is_current(output))

    def test_patch_adapters_and_shared_cores_all_invalidate_runtime(self):
        with tempfile.TemporaryDirectory() as temporary:
            root = Path(temporary)
            recipe = root / 'tools/dsview'
            core = root / 'python/logic_analyzer/decoders'
            core.mkdir(parents=True)
            (recipe / 'decoders/gate_driver_timing').mkdir(parents=True)
            (recipe / 'native').mkdir()
            files = [recipe / 'build.py', recipe / 'setgui-host.patch', recipe / 'gate-pair-checkbox.patch', recipe / 'decoder-panel.patch', recipe / 'driver-summary.patch', recipe / 'windows-usb-events.patch', recipe / 'native/gate_summary.h',
                     recipe / 'decoders/gate_driver_timing/pd.py']
            files += [core / (name + '.py') for name in ('gate_timing', 'transistor_pair', 'set_uart', 'set_can', 'pm35_uart')]
            for item in files:
                item.write_text('initial')
            with patch.object(BUILD, '__file__', str(recipe / 'build.py')):
                initial = BUILD.recipe_digest()
                for item in files:
                    with self.subTest(file=item.name):
                        item.write_text('changed')
                        self.assertNotEqual(initial, BUILD.recipe_digest())
                        item.write_text('initial')
                self.assertEqual(initial, BUILD.recipe_digest())