"""The settings page on the screen itself (app 0.2.52, firmware 0.2.44).

Two halves have to agree without ever seeing each other: the row table in settings_screen.h writes keys
that only mean something if ESP Screens knows them, and the eleven-key `settings` block older firmware
insists on may never grow. Both are checked here, against the real files.
"""
import importlib.util
import json
import re
import sys
import tempfile
import unittest
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(ROOT / 'screen_manager/app'))
import test_portal
from core import (BUILTIN, SETTING_RULES, SETTINGS_BESIDE_BLOCK, entity_id, min_firmware, validate_layout,
                  validate_settings)

SCREEN = (ROOT / 'components/smart_display/settings_screen.h').read_text()
RUNTIME = (ROOT / 'components/smart_display/runtime_tiles.h').read_text()
# The keys the firmware's own block still carries; everything newer travels as its own key.
FROZEN = {'standby_enabled', 'standby_seconds', 'brightness', 'standby_brightness', 'night_enabled',
          'night_start', 'night_end', 'night_brightness', 'show_clock', 'clock_24h', 'home_on_standby'}
assert FROZEN == set(SETTING_RULES) - set(SETTINGS_BESIDE_BLOCK)


class SettingsPage(unittest.TestCase):
    def test_every_key_the_screen_reports_is_a_setting_the_app_knows(self):
        keys = set(re.findall(r'changed\("(\w+)"', SCREEN))
        self.assertTrue(keys, 'no rows found in settings_screen.h')
        self.assertLessEqual(keys, set(SETTING_RULES), 'the screen writes a key ESP Screens would drop')

    def test_the_frozen_settings_block_keeps_exactly_eleven_keys(self):
        # Firmware before 0.2.44 refuses a `settings` object of any other size; that is why the newer
        # settings travel as their own keys.
        self.assertEqual(re.search(r'if \(obj\.size\(\) != (\d+)\) return false;', RUNTIME).group(1), '11')
        self.assertEqual(FROZEN, set(SETTING_RULES) & FROZEN)

    def test_new_settings_default_and_validate(self):
        clean = validate_settings({})
        self.assertEqual(clean['auto_home'], True)
        self.assertEqual(clean['auto_home_seconds'], 120)
        self.assertEqual(validate_settings({'auto_home_seconds': 30})['auto_home_seconds'], 30)
        for bad in ({'auto_home_seconds': 29}, {'auto_home_seconds': 3601}, {'auto_home': 1},
                    {'auto_home_seconds': True}):
            with self.assertRaises(ValueError):
                validate_settings(bad)

    def test_the_settings_tile_is_a_builtin_that_needs_new_firmware(self):
        self.assertIn('screen.settings', BUILTIN)
        self.assertTrue(entity_id('screen.settings'))
        self.assertEqual(min_firmware({'tiles': [{'entity': 'screen.settings'}]}), (0, 2, 44))
        self.assertLess(min_firmware({'tiles': [{'entity': 'screen.clock'}]}), (0, 2, 44))
        layout = validate_layout({'title': 'Home', 'tiles': [{'entity': 'screen.settings', 'name': 'Settings'}]})
        self.assertEqual(layout['tiles'][0]['entity'], 'screen.settings')


@unittest.skipUnless(importlib.util.find_spec('aiohttp'), 'Run using .venv-portal/bin/python for server tests')
class LayoutMessage(unittest.IsolatedAsyncioTestCase):
    async def test_the_new_keys_ride_beside_the_frozen_block(self):
        with tempfile.TemporaryDirectory() as temp:
            manager = test_portal.ManagerTests().setup_manager(Path(temp) / 'screens.json')
            layout = {'title': 'Home', 'tiles': [{'entity': 'light.a'}],
                      'settings': validate_settings({'auto_home': False, 'auto_home_seconds': 600})}
            manager.save('text.screen', layout)
            message = manager.layout_message('text.screen', manager.layouts['text.screen'], {})
            self.assertEqual(set(message['settings']), FROZEN, 'older firmware refuses any other size')
            self.assertEqual(message['auto_home'], False)
            self.assertEqual(message['auto_home_seconds'], 600)
            # A screen that never stored settings still gets the defaults, not a missing key.
            plain = manager.layout_message('text.screen', {**manager.layouts['text.screen'],
                                                           'settings': validate_settings({})}, {})
            self.assertEqual((plain['auto_home'], plain['auto_home_seconds']), (True, 120))
            self.assertLess(len(json.dumps(message)), 4096, 'the screen refuses a message over 4 KB')


class Firmware(unittest.TestCase):
    """The board profiles have to carry the page, its way in, and the timer that closes it."""

    def setUp(self):
        self.profiles = {name: (ROOT / name).read_text()
                         for name in ('home-like-2432s028.yaml', 'guition-4848s040.yaml')}

    def test_both_boards_wire_the_page_and_its_gesture(self):
        for name, text in self.profiles.items():
            self.assertIn('settings_screen::attach_hold', text, name)
            self.assertIn('settings_screen::report', text, name)
            self.assertIn('settings_screen::may_open', text, name)
            self.assertIn('- action: open_settings', text, name)
            self.assertIn('- id: go_home', text, name)
            self.assertIn('runtime_tiles::auto_home', text, name)
            self.assertIn('SCREEN_FIRMWARE_VERSION: "0.2.44"', text, name)

    def test_the_hold_strip_covers_the_top_bar_and_no_more(self):
        for name, text in self.profiles.items():
            values = dict(re.findall(r'^  (\w+): "([^"]*)"', text, re.M))
            width, scroll = int(values['DISPLAY_W']), int(values['SCROLL_Y'])
            x = int(values['SETTINGS_HOLD_X'].replace('${EDGE_SWIPE_BAND_PX}', values.get('EDGE_SWIPE_BAND_PX', '0')))
            hold = values['SETTINGS_HOLD_W'].replace('${DISPLAY_W}', values['DISPLAY_W'])
            self.assertLessEqual(x + int(hold), width, name)
            self.assertGreater(scroll, 20, name)
            if 'EDGE_SWIPE_BAND_PX' in values:
                # The page swipe owns both edge bands; the hold may not start there.
                band = int(values['EDGE_SWIPE_BAND_PX'])
                self.assertGreaterEqual(x, band, name)
                self.assertLessEqual(x + int(hold), width - band, name)


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