import sys
import tkinter as tk
from pathlib import Path
from unittest.mock import MagicMock

import pytest

# Ensure `installer` is importable when tests are invoked directly via `pytest`
PROJECT_ROOT = Path(__file__).resolve().parents[2]
if str(PROJECT_ROOT) not in sys.path:
    sys.path.insert(0, str(PROJECT_ROOT))

import knoe.ui.screens.cluster as cluster_mod
from knoe.ui.screens.base import ScreenBaseMixin
from knoe.ui.screens.cluster import ClusterScreenMixin


class _DummyClusterSaveApp(ScreenBaseMixin, ClusterScreenMixin):
    """Minimal surface to exercise the Cluster Environment screen Save behavior."""

    def __init__(self, root: tk.Tk):
        self.root = root
        # Canvas is not required by `_validate_and_save_cluster_config`, but other mixins
        # assume it exists.
        self.bg_canvas = tk.Canvas(root, width=1, height=1)
        self._canvas_items = []
        self._overlay_widgets = []

        self.cluster_env = tk.StringVar(master=root, value="service")
        self.selected_k3d_cluster = tk.StringVar(master=root, value="")
        self.selected_kubectx = tk.StringVar(master=root, value="")
        self.service_namespace = tk.StringVar(master=root, value="knoe-system")
        self.prod_artifacts_path = tk.StringVar(master=root, value=str(Path.home()))

        self.k3s_server_url = tk.StringVar(master=root, value="")
        self.k3s_token = tk.StringVar(master=root, value="")

        self.supabase_enabled = tk.BooleanVar(master=root, value=False)
        self.gitops_enabled = tk.BooleanVar(master=root, value=False)
        self.kerberos_enabled = tk.BooleanVar(master=root, value=False)
        self.at_rest_encryption_enabled = tk.BooleanVar(master=root, value=False)

        # Minimal config structure required by `_validate_and_save_cluster_config`.
        self.knoe_cfg_data = {
            "Initialize Cluster": {
                "ENVIRONMENT": "service",
                "K3S_SERVER_URL": "",
                "K3S_TOKEN": "",
            },
            "Global": {
                # Keep old/new equal so we don't trigger the namespace cleanup prompt.
                "SERVICE_NAMESPACE": "knoe-system",
            },
            "Optional Features": {},
            "Prod Cluster (k8s)": {},
        }

        self.saved_calls = 0
        self.status_check_calls = 0

    def _save_knoe_cfg(self):
        self.saved_calls += 1

    def _verify_k3s_services(self):
        self.status_check_calls += 1


def test_cluster_env_save_triggers_status_check(monkeypatch):
    # Some test modules replace tkinter with MagicMocks at import-time.
    if isinstance(sys.modules.get("tkinter"), MagicMock):
        pytest.skip("tkinter is mocked in this test run")

    # Avoid depending on a real kubeconfig file.
    monkeypatch.setattr(cluster_mod, "_find_kubeconfig_file", lambda: "/tmp/kubeconfig")
    # Avoid any real secret handling.
    monkeypatch.setattr(cluster_mod, "_encrypt_cfg_secret", lambda s: s)

    root = tk.Tk()
    root.withdraw()
    try:
        app = _DummyClusterSaveApp(root)

        assert app._validate_and_save_cluster_config() is True
        assert app.saved_calls == 1

        # Requirement: clicking Save should immediately run a status check.
        assert app.status_check_calls == 1
    finally:
        try:
            root.destroy()
        except Exception:
            pass


def test_cluster_env_prod_artifacts_dir_expands_knoe_home_from_cfg(monkeypatch, tmp_path):
    # Some test modules replace tkinter with MagicMocks at import-time.
    if isinstance(sys.modules.get("tkinter"), MagicMock):
        pytest.skip("tkinter is mocked in this test run")

    # Ensure `$KNOE_HOME` is NOT available as an OS env var; it must come from config.
    monkeypatch.delenv("KNOE_HOME", raising=False)
    monkeypatch.chdir(tmp_path)

    root = tk.Tk()
    root.withdraw()
    try:
        app = _DummyClusterSaveApp(root)

        # Switch to prod so the artifacts directory is validated/created.
        app.cluster_env.set("prod")

        # Provide KNOE_HOME via config data only.
        knoe_home = tmp_path / "knoe-home"
        knoe_home.mkdir(parents=True, exist_ok=True)
        app.knoe_cfg_data.setdefault("System Environment", {})["KNOE_HOME"] = str(
            knoe_home
        )

        # Use a path expression that previously would create a literal `$KNOE_HOME` dir.
        app.prod_artifacts_path.set("$KNOE_HOME/staging")

        assert app._validate_and_save_cluster_config() is True

        assert (knoe_home / "staging").is_dir()
        assert not (tmp_path / "$KNOE_HOME" / "staging").exists()
    finally:
        try:
            root.destroy()
        except Exception:
            pass