from __future__ import annotations

import re
import sys
import types
import unittest
from pathlib import Path
from unittest.mock import patch

import app.app as dashboard_app


class _Context:
    def __enter__(self) -> "_Context":
        return self

    def __exit__(self, *_args: object) -> bool:
        return False


class _FakeGradio(types.SimpleNamespace):
    def __init__(self) -> None:
        self.markdown_values: list[str] = []
        super().__init__(
            Blocks=lambda **_kwargs: _Context(),
            Column=lambda **_kwargs: _Context(),
            HTML=lambda *_args, **_kwargs: None,
            Markdown=self.Markdown,
            Tab=lambda *_args, **_kwargs: _Context(),
            Tabs=lambda **_kwargs: _Context(),
        )

    def Markdown(self, value: str, **_kwargs: object) -> None:
        self.markdown_values.append(value)


class HeaderTests(unittest.TestCase):
    def test_dashboard_tabs_include_numeric_semantics_between_static_tabs(self) -> None:
        self.assertEqual(
            dashboard_app.dashboard_tab_names(),
            [
                "Top Snippets",
                "Logit Lens",
                "Implicit Scenarios",
                "Numeric Semantics",
                "Activity Preference",
                "Continuation Steering",
                "Clustering",
                "PCA",
                "Layer Structure",
            ],
        )

    def test_dashboard_header_includes_github_link(self) -> None:
        fake_gradio = _FakeGradio()
        original_gradio = sys.modules.get("gradio")
        sys.modules["gradio"] = fake_gradio
        if original_gradio is None:
            self.addCleanup(lambda: sys.modules.pop("gradio", None))
        else:
            self.addCleanup(lambda: sys.modules.__setitem__("gradio", original_gradio))

        with patch.multiple(
            dashboard_app,
            top_snippets_dashboard_html=lambda _root: "",
            logit_lens_dashboard_html=lambda _root: "",
            build_implicit_scenarios_heatmap=lambda _root: object(),
            build_numeric_semantics_figure=lambda _root: object(),
            build_activity_preference_figure=lambda _root: object(),
            _causal_continuation_tab=lambda *_args, **_kwargs: None,
            build_cosine_heatmap=lambda _root: object(),
            build_umap_scatter=lambda _root: object(),
            build_pca_barplots=lambda _root: object(),
            build_pca_human_rating_scatter=lambda _root: object(),
            build_layer_similarity_heatmap=lambda _root: object(),
            _static_plot=lambda *_args, **_kwargs: None,
            _vector_plot=lambda *_args, **_kwargs: None,
        ):
            dashboard_app.build_dashboard(
                static_root=Path("static"),
                causal_root=Path("causal"),
                vector_space_root=Path("vector"),
            )

        expected_link = "[GitHub](https://github.com/y3zai/angry-claw)"
        self.assertTrue(
            any(expected_link in value for value in fake_gradio.markdown_values),
            fake_gradio.markdown_values,
        )

    def test_header_link_spacing_does_not_overlap_title(self) -> None:
        css = dashboard_app.dashboard_css()

        self.assertIn(".unified-demo-header-link", css)
        header_link_rules = re.findall(
            r"\.unified-demo-header-link\s*\{(?P<rules>[^}]*)\}",
            css,
        )
        self.assertTrue(header_link_rules, css)
        self.assertTrue(
            all("margin-top: -" not in rules for rules in header_link_rules),
            header_link_rules,
        )


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