"""设置页在线更新 UI 和后台线程测试。"""

import os
import tempfile
import time
import unittest
from pathlib import Path
from unittest.mock import patch

os.environ.setdefault("QT_QPA_PLATFORM", "offscreen")

from PyQt5.QtCore import QTimer
from PyQt5.QtTest import QTest
from PyQt5.QtWidgets import QApplication

from src.mock_admin_gateway import MockAdminGateway
from src.settings_repository import SettingsRepository
from src.settings_ui import SettingsPage
from src.update_service import (
    UPDATE_MANIFEST_SETTING,
    UpdateCheckResult,
    UpdateInfo,
)


MANIFEST_URL = "https://updates.example.test/autobuy%E2%80%94%E2%80%94manifest.json"


class FakeUpdateService:
    def __init__(self, result=None, delay=0.0, download_error=None):
        self.result = result or UpdateCheckResult("0.2.0", "0.2.0", False)
        self.delay = delay
        self.download_error = download_error
        self.check_count = 0
        self.download_count = 0

    def check(self, manifest_url, current_version="0.1.0", is_cancelled=None):
        self.check_count += 1
        self.manifest_url = manifest_url
        if self.delay:
            time.sleep(self.delay)
        return self.result

    def download_and_stage(self, update, is_cancelled=None, on_progress=None):
        self.download_count += 1
        if on_progress is not None:
            on_progress(50)
        if self.download_error is not None:
            raise self.download_error
        if on_progress is not None:
            on_progress(100)
        return Path("app.new")


class FakeButton:
    def setText(self, _text):
        pass

    def setFocus(self):
        pass


class AcceptDownloadMessageBox:
    def __init__(self, _title, _content, _parent):
        self.yesButton = FakeButton()
        self.cancelButton = FakeButton()

    def exec(self):
        return True


class UpdateUiEventTest(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        cls.app = QApplication.instance() or QApplication([])

    def setUp(self):
        self.temporary_directory = tempfile.TemporaryDirectory()
        self.repository = SettingsRepository(
            Path(self.temporary_directory.name) / "client.db"
        )

    def tearDown(self):
        self.temporary_directory.cleanup()

    def _page(self, service):
        return SettingsPage(
            settings_repository=self.repository,
            admin_gateway=MockAdminGateway(),
            update_service=service,
        )

    def _wait_until(self, predicate, timeout_ms=2000):
        elapsed = 0
        while not predicate() and elapsed < timeout_ms:
            QTest.qWait(10)
            elapsed += 10
        self.assertTrue(predicate(), "等待在线更新线程超时")

    def test_update_card_loads_saved_url_and_current_version(self):
        self.repository.set(UPDATE_MANIFEST_SETTING, MANIFEST_URL)
        page = self._page(FakeUpdateService())

        self.assertEqual(page.currentVersionLabel.text(), "0.2.0")
        self.assertEqual(page.updateManifestUrlInput.text(), MANIFEST_URL)
        self.assertTrue(page.updateCheckButton.isEnabled())
        page.eventBinder.shutdown()
        page.deleteLater()

    def test_http_url_is_rejected_before_starting_worker(self):
        service = FakeUpdateService()
        page = self._page(service)
        page.updateManifestUrlInput.setText("http://updates.example.test/manifest.json")

        page.updateCheckButton.click()

        self.assertIn("必须是有效的 HTTPS", page.updateStatusLabel.text())
        self.assertEqual(service.check_count, 0)
        page.eventBinder.shutdown()
        page.deleteLater()

    def test_slow_check_does_not_block_or_start_twice(self):
        service = FakeUpdateService(delay=0.08)
        page = self._page(service)
        page.updateManifestUrlInput.setText(MANIFEST_URL)
        timer_fired = []
        QTimer.singleShot(10, lambda: timer_fired.append(True))

        page.updateCheckButton.click()
        page.eventBinder.updateEventBinder.request_check()
        self._wait_until(lambda: bool(timer_fired), timeout_ms=500)
        self._wait_until(
            lambda: page.eventBinder.updateEventBinder._check_thread is None
        )

        self.assertEqual(service.check_count, 1)
        self.assertEqual(
            self.repository.get(UPDATE_MANIFEST_SETTING), MANIFEST_URL
        )
        self.assertIn("当前已是最新版本", page.updateStatusLabel.text())
        page.eventBinder.shutdown()
        page.deleteLater()

    def test_confirmed_new_version_downloads_and_stages(self):
        update = UpdateInfo(
            version="0.2.0",
            manifest_url=MANIFEST_URL,
            update_url="https://updates.example.test/CMAutoBuy-0.2.0-update.zip",
            file_name="CMAutoBuy-0.2.0-update.zip",
            size=1024,
            sha256="0" * 64,
        )
        service = FakeUpdateService(
            UpdateCheckResult("0.1.0", "0.2.0", True, update)
        )
        page = self._page(service)
        page.updateManifestUrlInput.setText(MANIFEST_URL)

        with patch("src.update_ui_event.MessageBox", AcceptDownloadMessageBox):
            page.updateCheckButton.click()
            self._wait_until(
                lambda: page.eventBinder.updateEventBinder._check_thread is None
                and page.eventBinder.updateEventBinder._download_thread is None
            )

        self.assertEqual(service.download_count, 1)
        self.assertIn("已准备好", page.updateStatusLabel.text())
        self.assertIn("重新启动", page.updateStatusLabel.text())
        page.eventBinder.shutdown()
        page.deleteLater()


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