from __future__ import annotations

import re
import unittest
from pathlib import Path


HTML_PATH = Path(__file__).resolve().parents[2] / "docs" / "design" / "brain" / "index.html"


class UIContractTests(unittest.TestCase):
    @classmethod
    def setUpClass(cls) -> None:
        cls.html = HTML_PATH.read_text(encoding="utf-8")

    def test_prototype_is_self_contained_and_labels_fixture_truthfully(self) -> None:
        self.assertIn("合成回放不等于模型效果", self.html)
        self.assertIn("离线 HTML 原型数据", self.html)
        self.assertNotRegex(self.html, r'(?:src|href)=["\']https?://')
        self.assertNotIn("@import url", self.html)

    def test_accessibility_and_responsive_guards_are_present(self) -> None:
        required = (
            'name="viewport"',
            'class="skip-link"',
            'aria-live="polite"',
            ':focus-visible',
            'prefers-reduced-motion',
            'min-height: 44px',
            '@media (max-width: 420px)',
            '.toolbar { display: grid; grid-template-columns: 1fr; }',
            '键盘用户可使用右侧坐标表单',
        )
        for marker in required:
            with self.subTest(marker=marker):
                self.assertIn(marker, self.html)

    def test_no_structural_emoji_or_unescaped_secret_placeholder_in_text(self) -> None:
        visible_without_script = re.sub(r"<script[\s\S]*?</script>", "", self.html)
        self.assertNotRegex(visible_without_script, r"[\U0001F300-\U0001FAFF]")
        self.assertEqual(self.html.count("__BRAIN_DEMO_TOKEN__"), 1)


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