from __future__ import annotations

import knoe.ui.screens.cluster_nodes as cluster_nodes
from knoe.ui.screens.cluster_nodes import ClusterNodesScreenMixin


def test_render_cluster_nodes_page_topology_messages_are_scrollable(monkeypatch):
    class _DummyWidget:
        def __init__(self, *_args, **_kwargs):
            pass

        def destroy(self):
            return None

        def place_forget(self):
            return None

        def configure(self, **_kwargs):
            return None

        def pack(self, *_args, **_kwargs):
            return None

        def grid(self, *_args, **_kwargs):
            return None

    class _DummyFrame(_DummyWidget):
        def winfo_children(self):
            return [_DummyWidget()]

        def winfo_reqheight(self):
            return 0

        def update_idletasks(self):
            return None

        def grid_slaves(self, *_args, **_kwargs):
            return [_DummyWidget()]

    class _DummyScrollbar(_DummyWidget):
        instances: list["_DummyScrollbar"] = []

        def __init__(self, *_args, **kwargs):
            super().__init__()
            self.command = kwargs.get("command")
            _DummyScrollbar.instances.append(self)

        def pack(self, *_args, **_kwargs):
            return None

        def set(self, *_args, **_kwargs):
            return None

        def configure(self, **kwargs):
            if "command" in kwargs:
                self.command = kwargs["command"]

    class _DummyText(_DummyWidget):
        instances: list["_DummyText"] = []

        def __init__(self, *_args, **kwargs):
            super().__init__()
            self.yscrollcommand = kwargs.get("yscrollcommand")
            self.contents = ""
            self.state = "normal"
            _DummyText.instances.append(self)

        def pack(self, *_args, **_kwargs):
            return None

        def insert(self, _idx: str, text: str):
            self.contents += text

        def see(self, *_args, **_kwargs):
            return None

        def configure(self, **kwargs):
            if "state" in kwargs:
                self.state = kwargs["state"]

        def yview(self, *_args, **_kwargs):
            return None

    monkeypatch.setattr(cluster_nodes.tk, "Frame", _DummyFrame)
    monkeypatch.setattr(cluster_nodes.tk, "Scrollbar", _DummyScrollbar)
    monkeypatch.setattr(cluster_nodes.tk, "Text", _DummyText)
    monkeypatch.setattr(cluster_nodes.tk, "Button", _DummyWidget)
    monkeypatch.setattr(cluster_nodes.tk, "Label", _DummyWidget)

    class _DummyCanvas:
        def __init__(self):
            self._next_id = 1

        def create_text(self, *_args, **_kwargs):
            item = self._next_id
            self._next_id += 1
            return item

        def create_window(self, *_args, **_kwargs):
            item = self._next_id
            self._next_id += 1
            return item

    class _DummyApp(ClusterNodesScreenMixin):
        def __init__(self):
            self.bg_canvas = _DummyCanvas()
            self._canvas_items: list[int] = []
            self._overlay_widgets: list[object] = []
            self._cluster_nodes_topology_state = {
                "phase": "complete",
                "messages": [f"line-{i}" for i in range(1, 7)],
                "topology": None,
                "topology_path": "",
                "selected": set(),
                "busy": True,
                "expanded": None,
            }

        def _clear_canvas_page(self):
            return None

        def _should_show_cluster_nodes_screen(self):
            return True

        def _render_title(self, *_args, **_kwargs):
            return None

        def _render_paragraph(self, *_args, **_kwargs):
            return None

        def _cluster_nodes_start_discovery(self, force: bool = False):
            return None

        def _cluster_nodes_render_summary_cards(self, _topology, _x, y):
            return y

        def _cluster_nodes_render_table(self, _topology, _x, y):
            return y

    app = _DummyApp()
    app._render_cluster_nodes_page()

    assert _DummyScrollbar.instances
    assert _DummyText.instances
    assert _DummyText.instances[0].state == "disabled"
    assert "line-1" in _DummyText.instances[0].contents
    assert "line-6" in _DummyText.instances[0].contents
    assert _DummyScrollbar.instances[0].command is not None