# Released under the MIT License. See LICENSE for details.
#
"""Provides ui for network related testing."""

import time
import copy
import weakref
from dataclasses import dataclass
from threading import Thread
from typing import TYPE_CHECKING, override

from efro.error import CleanError
from efro.util import strip_exception_tracebacks, strict_partial
from bauiv1lib.settings.testing import TestingWindow
from bauiv1lib.utils import get_screen_margins, scroll_fade_top
import bauiv1 as bui
from bauiv1 import _commonassets, classicassets

if TYPE_CHECKING:
    from typing import Callable, Any

# We generally want all net tests to timeout on their own, but we add
# sort of sane max in case they don't.
MAX_TEST_SECONDS = 60 * 2


class NetTestingWindow(bui.MainWindow):
    """Window that runs a networking test suite to help diagnose issues."""

    def __init__(
        self,
        transition: str | None = 'in_right',
        origin_widget: bui.Widget | None = None,
    ):
        uiscale = bui.app.ui_v1.uiscale
        self._width = 1200 if uiscale is bui.UIScale.SMALL else 820
        self._height = (
            800
            if uiscale is bui.UIScale.SMALL
            else 550 if uiscale is bui.UIScale.MEDIUM else 650
        )

        self._printed_lines: list[str] = []
        assert bui.app.classic is not None

        # Do some fancy math to fill all available screen area up to the
        # size of our backing container. This lets us fit to the exact
        # screen shape at small ui scale.
        screensize = bui.get_virtual_screen_size()
        scale = (
            1.75
            if uiscale is bui.UIScale.SMALL
            else 1.0 if uiscale is bui.UIScale.MEDIUM else 0.75
        )

        # Calc screen size in our local container space and clamp to a
        # bit smaller than our container size.
        target_width = min(self._width - 90, screensize[0] / scale)
        target_height = min(self._height - 90, screensize[1] / scale)

        # To get top/left coords, go to the center of our window and
        # offset by half the width/height of our target area.
        yoffs = 0.5 * self._height + 0.5 * target_height + 30.0

        scroll_width = target_width
        scroll_height = target_height - 52
        scroll_bottom = yoffs - 82 - scroll_height

        # In small ui we extend our scrollable area out into the screen
        # margins (space between the virtual bounds and the actual
        # screen edges) while keeping content laid out within the
        # virtual bounds.
        margin_left, margin_right, margin_bottom, margin_top = (
            get_screen_margins(scale)
            if uiscale is bui.UIScale.SMALL
            else (0.0, 0.0, 0.0, 0.0)
        )

        # In small ui we also extend the scroll's top edge all the way
        # up to the top of the screen; soft blobs then keep our title
        # and titlebar buttons legible over any content scrolled up
        # there. Content gets padded to stay clear of the faded areas.
        top_extend = (
            (0.5 * self._height + 0.5 * (screensize[1] / scale))
            - (scroll_bottom + scroll_height)
            + margin_top
            if uiscale is bui.UIScale.SMALL
            else 0.0
        )

        # A bit of extra padding above our content so the soft blobs
        # fading things out under the title don't eat into our top
        # rows when scrolled to the top.
        top_pad = 15.0 if uiscale is bui.UIScale.SMALL else 0.0

        super().__init__(
            root_widget=bui.containerwidget(
                size=(self._width, self._height),
                scale=scale,
                toolbar_visibility=(
                    'menu_minimal'
                    if uiscale is bui.UIScale.SMALL
                    else 'menu_full'
                ),
            ),
            transition=transition,
            origin_widget=origin_widget,
            # We're affected by screen size only at small ui-scale.
            refresh_on_screen_size_changes=uiscale is bui.UIScale.SMALL,
        )
        self._back_button: bui.Widget | None
        if uiscale is bui.UIScale.SMALL:
            bui.containerwidget(
                edit=self._root_widget, on_cancel_call=self.main_window_back
            )
            self._back_button = None
        else:
            self._back_button = bui.buttonwidget(
                parent=self._root_widget,
                id=f'{self.main_window_id_prefix}|back',
                position=(46, yoffs - 77),
                size=(60, 60),
                scale=0.9,
                label=bui.charstr(bui.SpecialChar.BACK),
                button_type='backSmall',
                autoselect=True,
                on_activate_call=self.main_window_back,
            )
            bui.containerwidget(
                edit=self._root_widget, cancel_button=self._back_button
            )

        self._scroll = bui.scrollwidget(
            parent=self._root_widget,
            size=(
                scroll_width + margin_left + margin_right,
                scroll_height + margin_bottom + top_extend,
            ),
            position=(
                self._width * 0.5 - scroll_width * 0.5 - margin_left,
                scroll_bottom - margin_bottom,
            ),
            capture_arrows=True,
            autoselect=True,
            border_opacity=0.4,
        )

        # Our scroll area extends up past our title; these soft blobs
        # (plus the title and titlebar buttons being drawn after the
        # scroll area) keep those legible over content scrolled up
        # there. Note that we intentionally use the original
        # un-margin-extended scroll geometry here so the blobs
        # coincide with that chrome, which doesn't move when we extend
        # out into screen margins.
        if uiscale is bui.UIScale.SMALL:
            scroll_fade_top(
                self._root_widget,
                self._width * 0.5 - scroll_width * 0.5,
                scroll_bottom,
                scroll_width,
                scroll_height,
                # Nudge the blobs up so their most-opaque core covers
                # our title and titlebar-button area.
                yoffs_extra=30.0,
            )

        # Avoid squads button on small mode.
        # xinset = -50 if uiscale is bui.UIScale.SMALL else 0

        xextra = -80 if uiscale is bui.UIScale.SMALL else 0
        self._copy_button = bui.buttonwidget(
            parent=self._root_widget,
            id=f'{self.main_window_id_prefix}|copy',
            position=(
                self._width * 0.5 + scroll_width * 0.5 - 210 + 80 + xextra,
                yoffs - 79,
            ),
            size=(100, 60),
            scale=0.8,
            autoselect=True,
            label=_commonassets.strings.actions.copy,
            on_activate_call=self._copy,
        )
        # Explicitly slot titlebar buttons in front of the soft blobs
        # (all children of a container share a single depth slice, so
        # creation order alone doesn't put our opaque parts in front
        # of the blobs' transparent faces).
        bui.widget(edit=self._copy_button, depth_range=(0.95, 1.0))

        self._settings_button = bui.buttonwidget(
            parent=self._root_widget,
            id=f'{self.main_window_id_prefix}|settings',
            position=(
                self._width * 0.5 + scroll_width * 0.5 - 110 + 80 + xextra,
                yoffs - 77,
            ),
            size=(60, 60),
            scale=0.8,
            autoselect=True,
            label='...',
            on_activate_call=self._show_val_testing,
        )
        bui.widget(edit=self._settings_button, depth_range=(0.95, 1.0))

        ttxt = bui.textwidget(
            parent=self._root_widget,
            position=(self._width * 0.5, yoffs - 55),
            size=(0, 0),
            text=classicassets.strings.settings.net_testing.title,
            color=(0.8, 0.8, 0.8, 1.0),
            h_align='center',
            v_align='center',
            maxwidth=250,
        )
        bui.widget(edit=ttxt, depth_range=(0.9, 1.0))

        self._rows = bui.columnwidget(
            parent=self._scroll,
            id=f'{self.main_window_id_prefix}|content',
            left_border=margin_left,
        )
        # One-time padding above our content so it starts clear of the
        # soft blobs under the title (note that the column's border
        # args apply per-child, so they can't be used for this).
        if top_extend + top_pad > 0.0:
            bui.textwidget(
                parent=self._rows,
                size=(0, top_extend + top_pad),
                text='',
            )

        # Now kick off the tests.
        # Pass a weak-ref to this window so we don't keep it alive
        # if we back out before it completes. Also set is as daemon
        # so it doesn't keep the app running if the user is trying to quit.
        Thread(
            target=bui.CallStrict(_run_diagnostics, weakref.ref(self))
        ).start()

    @override
    def get_main_window_state(self) -> bui.MainWindowState:
        # Support recreating our window for back/refresh purposes.
        cls = type(self)
        return bui.BasicMainWindowState(
            create_call=lambda transition, origin_widget: cls(
                transition=transition, origin_widget=origin_widget
            )
        )

    @override
    def main_window_should_preserve_selection(self) -> bool:
        return True

    def print(self, text: str, color: tuple[float, float, float]) -> None:
        """Print text to our console thingie."""
        for line in text.splitlines():
            txt = bui.textwidget(
                parent=self._rows,
                color=color,
                text=line,
                scale=0.75,
                flatness=1.0,
                shadow=0.0,
                size=(0, 20),
            )
            bui.containerwidget(edit=self._rows, visible_child=txt)
            self._printed_lines.append(line)

    def _copy(self) -> None:
        if not bui.clipboard_is_supported():
            bui.screenmessage(
                'Clipboard not supported on this platform.', color=(1, 0, 0)
            )
            return
        bui.clipboard_set_text('\n'.join(self._printed_lines))
        bui.screenmessage(f'{len(self._printed_lines)} lines copied.')

    def _show_val_testing(self) -> None:
        assert bui.app.classic is not None

        self.main_window_replace(get_net_val_testing_window)


def _run_diagnostics(weakwin: weakref.ref[NetTestingWindow]) -> None:

    from efro.util import utc_now

    have_error = [False]

    # We're running in a background thread but UI stuff needs to run
    # in the logic thread; give ourself a way to pass stuff to it.
    def _print(
        text: str, color: tuple[float, float, float] | None = None
    ) -> None:
        def _print_in_logic_thread() -> None:
            win = weakwin()
            if win is not None:
                win.print(text, (1.0, 1.0, 1.0) if color is None else color)

        bui.pushcall(_print_in_logic_thread, from_other_thread=True)

    def _print_test_results(call: Callable[[], Any]) -> bool:
        """Run the provided call, print result, & return success."""
        starttime = time.monotonic()
        try:
            call()
            duration = time.monotonic() - starttime
            _print(f'Succeeded in {duration:.3f}s.', color=(0, 1, 0))
            return True
        except Exception as exc:
            import traceback

            duration = time.monotonic() - starttime
            msg = (
                str(exc)
                if isinstance(exc, CleanError)
                else traceback.format_exc()
            )
            _print(msg, color=(1.0, 1.0, 0.3))
            _print(f'Failed in {duration:.2f}s.', color=(1, 0, 0))
            have_error[0] = True

            # We're done with the exception, so strip its tracebacks to
            # avoid reference cycles.
            strip_exception_tracebacks(exc)

            return False

    try:
        plus = bui.app.plus
        assert plus is not None

        assert bui.app.classic is not None

        _print(
            f'Running network diagnostics...\n'
            f'ua: {bui.app.classic.legacy_user_agent_string}\n'
            f'time: {utc_now()}.'
        )

        if bool(False):
            _print('\nRunning dummy success test...')
            _print_test_results(_dummy_success)

            _print('\nRunning dummy fail test...')
            _print_test_results(_dummy_fail)

        # Bootstrap pings
        bootstrap_addrs = plus.get_bootstrap_server_addresses()
        for i, addr in enumerate(bootstrap_addrs):
            _print(
                f'\nContacting bootstrap addr {i+1}'
                f' of {len(bootstrap_addrs)} ({addr})...'
            )
            _print_test_results(strict_partial(_test_fetch, addr))

        # V2 ping
        # (UPDATE: Disabling since this is also a bootstrap server).
        # baseaddr = plus.get_master_server_address()
        # _print(f'\nContacting V2 master-server ({baseaddr})...')
        # _print_test_results(lambda: _test_fetch(baseaddr))

        _print('\nComparing local time to V2 server...')
        _print_test_results(_test_v2_time)

        if plus.get_v1_account_state() == 'signed_in':
            _print('\nRunning V1 transaction...')
            _print_test_results(_test_v1_transaction)
        else:
            _print('\nSkipping V1 transaction (Not signed into V1).')

        # Get V2 nearby zone
        with bui.app.net.zone_pings_lock:
            zone_pings = copy.deepcopy(bui.app.net.zone_pings)
        nearest_zone = (
            None
            if not zone_pings
            else sorted(zone_pings.items(), key=lambda i: i[1])[0]
        )

        if nearest_zone is not None:
            nearstr = f'{nearest_zone[0]}: {nearest_zone[1]:.0f}ms'
        else:
            nearstr = '-'
        _print(f'\nChecking nearest V2 zone ping ({nearstr})...')
        _print_test_results(lambda: _test_nearby_zone_ping(nearest_zone))

        _print('\nSending V2 cloud message...')
        _print_test_results(_test_v2_cloud_message)

        if have_error[0]:
            _print(
                '\nDiagnostics complete. Some diagnostics failed.',
                color=(10, 0, 0),
            )
        else:
            _print(
                '\nDiagnostics complete. Everything looks good!',
                color=(0, 1, 0),
            )
    except Exception as exc:
        import traceback

        _print(
            f'An unexpected error occurred during testing;'
            f' please report this.\n'
            f'{traceback.format_exc()}',
            color=(1, 0, 0),
        )
        # We're done with the exception, so strip its tracebacks to
        # avoid reference cycles.
        strip_exception_tracebacks(exc)


def _dummy_success() -> None:
    """Dummy success test."""
    time.sleep(1.2)


def _dummy_fail() -> None:
    """Dummy fail test case."""
    raise RuntimeError('fail-test')


def _test_v1_transaction() -> None:
    """Dummy fail test case."""
    plus = bui.app.plus
    assert plus is not None

    if plus.get_v1_account_state() != 'signed_in':
        raise RuntimeError('Not signed in.')

    starttime = time.monotonic()

    # Gets set to True on success or string on error.
    results: list[Any] = [False]

    def _cb(cbresults: Any) -> None:
        # Simply set results here; our other thread acts on them.
        if not isinstance(cbresults, dict) or 'party_code' not in cbresults:
            results[0] = 'Unexpected transaction response'
            return
        results[0] = True  # Success!

    def _do_it() -> None:
        assert plus is not None
        # Fire off a transaction with a callback.
        plus.add_v1_account_transaction(
            {
                'type': 'PRIVATE_PARTY_QUERY',
                'expire_time': time.time() + 20,
            },
            callback=_cb,
        )
        plus.run_v1_account_transactions()

    bui.pushcall(_do_it, from_other_thread=True)

    while results[0] is False:
        time.sleep(0.01)
        if time.monotonic() - starttime > MAX_TEST_SECONDS:
            raise RuntimeError(
                f'test timed out after {MAX_TEST_SECONDS} seconds'
            )

    # If we got left a string, its an error.
    if isinstance(results[0], str):
        raise RuntimeError(results[0])


@dataclass
class _V2CloudMessageResults:
    errstr: str | None = None
    send_time: float | None = None
    response_time: float | None = None


def _test_v2_cloud_message() -> None:
    import bacommon.cloud

    results = _V2CloudMessageResults()

    def _cb(response: bacommon.cloud.PingResponse | Exception) -> None:
        # Note: this runs in another thread so need to avoid exceptions.
        results.response_time = time.monotonic()
        if isinstance(response, Exception):
            results.errstr = str(response)
        if not isinstance(response, bacommon.cloud.PingResponse):
            results.errstr = f'invalid response type: {type(response)}.'

    def _send() -> None:
        # Note: this runs in another thread so need to avoid exceptions.
        results.send_time = time.monotonic()
        assert bui.app.plus is not None
        bui.app.plus.cloud.send_message_cb(bacommon.cloud.PingMessage(), _cb)

    # This stuff expects to be run from the logic thread.
    bui.pushcall(_send, from_other_thread=True)

    wait_start_time = time.monotonic()
    while True:
        if results.response_time is not None:
            break
        time.sleep(0.01)
        if time.monotonic() - wait_start_time > MAX_TEST_SECONDS:
            raise RuntimeError(
                f'Timeout ({MAX_TEST_SECONDS} seconds)'
                f' waiting for cloud message response'
            )
    if results.errstr is not None:
        raise RuntimeError(results.errstr)


def _test_v2_time() -> None:
    offset = bui.app.net.server_time_offset_hours
    if offset is None:
        raise RuntimeError(
            'no time offset found;'
            ' perhaps unable to communicate with v2 server?'
        )
    if abs(offset) >= 2.0:
        raise CleanError(
            f'Your device time is off from world time by {offset:.1f} hours.\n'
            'This may cause network operations to fail due to your device\n'
            ' incorrectly treating SSL certificates as not-yet-valid, etc.\n'
            'Check your device time and time-zone settings to fix this.\n'
        )


def _test_fetch(baseaddr: str) -> None:

    upool = bui.app.net.urllib3pool
    response = upool.request('GET', f'{baseaddr}/ping')
    if response.status != 200:
        raise RuntimeError(f'Got unexpected response code {response.status}.')
    data = response.data
    if data != b'pong':
        raise RuntimeError('Got unexpected response data.')


def _test_nearby_zone_ping(nearest_zone: tuple[str, float] | None) -> None:
    """Try to ping nearest v2 zone."""
    if nearest_zone is None:
        raise RuntimeError('No nearest zone.')
    if nearest_zone[1] > 500:
        raise RuntimeError('Ping too high.')


def get_net_val_testing_window() -> TestingWindow:
    """Create a window for testing net values."""
    entries = [
        {'name': 'bufferTime', 'label': 'Buffer Time', 'increment': 1.0},
        {
            'name': 'delaySampling',
            'label': 'Delay Sampling',
            'increment': 1.0,
        },
        {
            'name': 'dynamicsSyncTime',
            'label': 'Dynamics Sync Time',
            'increment': 10,
        },
        {'name': 'showNetInfo', 'label': 'Show Net Info', 'increment': 1},
    ]
    return TestingWindow(
        title=classicassets.strings.settings.net_testing.title,
        entries=entries,
    )


# class NetValTestingWindow(TestingWindow):
#     """Window to test network related settings."""

#     def __init__(self, transition: str = 'in_right'):
#         entries = [
#             {'name': 'bufferTime', 'label': 'Buffer Time', 'increment': 1.0},
#             {
#                 'name': 'delaySampling',
#                 'label': 'Delay Sampling',
#                 'increment': 1.0,
#             },
#             {
#                 'name': 'dynamicsSyncTime',
#                 'label': 'Dynamics Sync Time',
#                 'increment': 10,
#             },
#             {'name': 'showNetInfo', 'label': 'Show Net Info', 'increment': 1},
#         ]
#         super().__init__(
#             title=classicassets.strings.settings.net_testing.title,
#             entries=entries,
#             transition=transition,
#         )
