from __future__ import annotations


from pathlib import Path


from knoe.ui.screens.cfg import ConfigMixin


class _Var:
    def __init__(self, value: str):
        self._value = value

    def get(self) -> str:
        return self._value


class _DummyCfgApp(ConfigMixin):
    def __init__(
        self,
        conf_dir: Path,
        kubectx: str,
        *,
        mode: str = "k3d",
        cluster_env: str = "dev",
        service_namespace_input: str = "knoe-system",
        resolved_service_namespace: str = "knoe-system",
        existing_global: dict | None = None,
    ):
        self._conf_dir = conf_dir
        self._cfg_path_override = conf_dir / "knoe.cfg"
        self._mode = mode
        self._resolved_service_namespace = resolved_service_namespace

        # Minimal surface required by ConfigMixin._save_knoe_cfg
        self.cluster_env = _Var(cluster_env)
        self.selected_kubectx = _Var(kubectx)
        self.db_username = _Var("knoe-db")
        self.db_password = _Var("secret")
        self.db_namespace = _Var("knoe-system")
        self.cnpg_cluster_name = _Var("knoe-db")
        self.db_host_port = _Var("5432")
        self.supabase_pv_node = _Var("")
        self.supabase_pv_base_dir = _Var("")
        self.gitops_node_selector = _Var("")
        self.argocd_node_selector = _Var("")
        self.k3s_server_url = _Var("")
        self.k3s_token = _Var("")
        self.prod_artifacts_path = _Var(str(conf_dir))

        self.service_namespace = _Var(service_namespace_input)

        self.knoe_cfg_data = {
            "Global": dict(existing_global or {}),
            "Initialize Cluster": {},
            "Dev Cluster (k3d)": {},
            "Service Cluster (k3s)": {},
            "Prod Cluster (k8s)": {},
        }

    def _resolve_knoe_conf_dir(self) -> Path:
        return self._conf_dir

    def _deployment_mode(self) -> str:
        return self._mode

    def _get_service_namespace(self) -> str:
        return self._resolved_service_namespace

    def _secret_cfg_value(self, _section: str, _key: str, value: str, *_args) -> str:
        return value

    def _save_ansible_knoe_vault(self, _db_password: str):
        return None

    def _sanitize_sections_for_cfg(self, sections: dict) -> dict:
        return sections

    def _sync_port_forward_mappings(self):
        # Not relevant for this unit test; avoids requiring optional-feature vars.
        return None

    def _collect_input_snapshot(self) -> dict:
        return {}


def test_save_knoe_cfg_persists_kubecontext(tmp_path, monkeypatch):
    # Avoid touching real env activation during unit test.
    import knoe.ui.screens.cfg as cfg_mod

    monkeypatch.setattr(cfg_mod.knoe_conf, "activate_environment", lambda *_a, **_k: None)

    app = _DummyCfgApp(conf_dir=tmp_path, kubectx="k3d-knoe-system")
    app._save_knoe_cfg()

    text = (tmp_path / "knoe.cfg").read_text(encoding="utf-8")
    assert "KUBECONTEXT" in text
    assert "k3d-knoe-system" in text


def test_save_knoe_cfg_service_mode_drops_generated_localhost_values(
    tmp_path, monkeypatch
):
    import knoe.ui.screens.cfg as cfg_mod

    monkeypatch.setattr(cfg_mod.knoe_conf, "activate_environment", lambda *_a, **_k: None)

    app = _DummyCfgApp(
        conf_dir=tmp_path,
        kubectx="",
        mode="k3s",
        cluster_env="service",
        service_namespace_input="",
        resolved_service_namespace="knoe-system",
        existing_global={
            "SERVICE_HOSTNAME": "k3d.localhost",
            "API_SERVICE_ENDPOINT": "http://localhost:8081",
            "PROLE_OPENTOFU_URL": "http://127.0.0.1:8080",
        },
    )
    app._save_knoe_cfg()

    text = (tmp_path / "knoe.cfg").read_text(encoding="utf-8")
    assert "SERVICE_HOSTNAME" not in text
    assert "API_SERVICE_ENDPOINT" not in text
    assert "localhost" not in text
    assert "SERVICE_NAMESPACE" not in text


def test_save_knoe_cfg_service_mode_keeps_explicit_service_namespace(
    tmp_path, monkeypatch
):
    import knoe.ui.screens.cfg as cfg_mod

    monkeypatch.setattr(cfg_mod.knoe_conf, "activate_environment", lambda *_a, **_k: None)

    app = _DummyCfgApp(
        conf_dir=tmp_path,
        kubectx="",
        mode="k3s",
        cluster_env="service",
        service_namespace_input="explicit-ns",
        resolved_service_namespace="explicit-ns",
    )
    app._save_knoe_cfg()

    text = (tmp_path / "knoe.cfg").read_text(encoding="utf-8")
    assert "SERVICE_NAMESPACE = explicit-ns" in text


def test_save_knoe_cfg_service_mode_repeated_saves_remain_clean(tmp_path, monkeypatch):
    import knoe.ui.screens.cfg as cfg_mod

    monkeypatch.setattr(cfg_mod.knoe_conf, "activate_environment", lambda *_a, **_k: None)

    app = _DummyCfgApp(
        conf_dir=tmp_path,
        kubectx="",
        mode="k3s",
        cluster_env="service",
        service_namespace_input="",
        resolved_service_namespace="knoe-system",
        existing_global={
            "SERVICE_HOSTNAME": "k3d.localhost",
            "API_SERVICE_ENDPOINT": "http://localhost:8081",
        },
    )

    app._save_knoe_cfg()
    first = (tmp_path / "knoe.cfg").read_text(encoding="utf-8")
    app._save_knoe_cfg()
    second = (tmp_path / "knoe.cfg").read_text(encoding="utf-8")

    for text in (first, second):
        assert "SERVICE_HOSTNAME" not in text
        assert "API_SERVICE_ENDPOINT" not in text
        assert "localhost" not in text