from __future__ import annotations

import sys
import unittest
from pathlib import Path

from fastapi.staticfiles import StaticFiles
from starlette.routing import Mount

sys.path.insert(0, str(Path(__file__).resolve().parents[3]))

from backend.app.main import app


class UiSmokeGoldenTest(unittest.TestCase):
    def _ui_mount(self) -> Mount:
        for route in app.routes:
            if isinstance(route, Mount) and route.path == "/ui":
                return route
        self.fail("Expected /ui mount to be registered")

    def test_ui_mount_and_index_contains_expected_panels(self) -> None:
        mount = self._ui_mount()
        self.assertIsInstance(mount.app, StaticFiles)
        index_path = Path(mount.app.directory) / "index.html"
        self.assertTrue(index_path.exists())

        body = index_path.read_text(encoding="utf-8")
        self.assertIn('id="workspace"', body)
        self.assertIn('id="footer-bar"', body)
        self.assertIn('id="left-pane"', body)
        self.assertIn('id="right-pane"', body)
        self.assertIn('id="left-items"', body)
        self.assertIn('id="right-items"', body)
        self.assertIn('id="mkdir-btn"', body)
        self.assertIn('id="left-breadcrumbs"', body)
        self.assertIn('id="right-breadcrumbs"', body)
        self.assertNotIn('id="bookmarks-panel"', body)
        self.assertNotIn('id="tasks-panel"', body)

    def test_ui_static_assets_are_present_and_mapped(self) -> None:
        mount = self._ui_mount()
        static_root = Path(mount.app.directory)
        self.assertTrue((static_root / "app.js").exists())
        self.assertTrue((static_root / "style.css").exists())

        app_js_url = app.url_path_for("ui", path="/app.js")
        style_css_url = app.url_path_for("ui", path="/style.css")
        self.assertEqual(app_js_url, "/ui/app.js")
        self.assertEqual(style_css_url, "/ui/style.css")


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