from __future__ import annotations

import importlib.util
from argparse import Namespace
from pathlib import Path

REPO_ROOT = Path(__file__).resolve().parents[1]
_RENDER_PATH = REPO_ROOT / "supabase" / "helm" / "render_supabase.py"


def _load_render_module():
    spec = importlib.util.spec_from_file_location("prole_render_supabase", _RENDER_PATH)
    assert spec is not None and spec.loader is not None
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    return module


_render_mod = _load_render_module()
_build_overlay = _render_mod._build_overlay
_read_cfg = _render_mod._read_cfg


def _write_cfg(path: Path, content: str) -> None:
    path.write_text(content.strip() + "\n", encoding="utf-8")


def test_render_supabase_uses_supabase_hostname_for_public_urls(tmp_path: Path, monkeypatch):
    # Ensure env doesn't interfere with config-driven behavior.
    monkeypatch.delenv("SUPABASE_HOST", raising=False)
    monkeypatch.delenv("SUPABASE_HOSTNAME", raising=False)
    monkeypatch.delenv("KNOE_DB_NAMESPACE", raising=False)
    monkeypatch.delenv("KNOE_DB_SERVICE", raising=False)

    cfg_path = tmp_path / "prole.cfg"
    _write_cfg(
        cfg_path,
        """
        [User]
        supabase_hostname = db.prole.org

        [Inputs]
        init_password.db_password = test-password
        init_password.db_host_port = 5432

        [Global]
        NAMESPACE = test-ns
        STORAGE_BACKEND = local
        """,
    )

    cfg = _read_cfg(cfg_path)
    args = Namespace(output_dir=str(tmp_path / "gen"), manifests_dir=str(tmp_path / "k8s"))
    overlay, _meta = _build_overlay(cfg, args)

    assert overlay["ingress"]["hosts"][0]["host"] == "db.prole.org"
    assert overlay["environment"]["auth"]["API_EXTERNAL_URL"] == "https://db.prole.org"
    assert overlay["environment"]["auth"]["GOTRUE_SITE_URL"] == "https://db.prole.org"
    assert overlay["environment"]["studio"]["SUPABASE_PUBLIC_URL"] == "https://db.prole.org"


def test_render_supabase_allows_scheme_in_supabase_hostname(tmp_path: Path, monkeypatch):
    monkeypatch.delenv("SUPABASE_HOST", raising=False)
    monkeypatch.delenv("SUPABASE_HOSTNAME", raising=False)
    monkeypatch.delenv("KNOE_DB_NAMESPACE", raising=False)
    monkeypatch.delenv("KNOE_DB_SERVICE", raising=False)

    cfg_path = tmp_path / "prole.cfg"
    _write_cfg(
        cfg_path,
        """
        [User]
        supabase_hostname = http://db.prole.org

        [Inputs]
        init_password.db_password = test-password
        init_password.db_host_port = 5432

        [Global]
        NAMESPACE = test-ns
        STORAGE_BACKEND = local
        """,
    )

    cfg = _read_cfg(cfg_path)
    args = Namespace(output_dir=str(tmp_path / "gen"), manifests_dir=str(tmp_path / "k8s"))
    overlay, _meta = _build_overlay(cfg, args)

    assert overlay["ingress"]["hosts"][0]["host"] == "db.prole.org"
    assert overlay["environment"]["auth"]["API_EXTERNAL_URL"] == "http://db.prole.org"
    assert overlay["environment"]["studio"]["SUPABASE_PUBLIC_URL"] == "http://db.prole.org"


def test_render_supabase_splits_api_and_studio_hosts_for_k8s(tmp_path: Path, monkeypatch):
    monkeypatch.delenv("SUPABASE_HOST", raising=False)
    monkeypatch.delenv("SUPABASE_HOSTNAME", raising=False)
    monkeypatch.delenv("KNOE_DB_NAMESPACE", raising=False)
    monkeypatch.delenv("KNOE_DB_SERVICE", raising=False)

    cfg_path = tmp_path / "prole.cfg"
    _write_cfg(
        cfg_path,
        """
        [Inputs]
        init_password.db_password = test-password
        init_password.db_host_port = 5432

        [Global]
        NAMESPACE = test-ns
        DEPLOYMENT_MODE = k8s
        SUPABASE_API_HOSTNAME = api.knoe.dev
        SUPABASE_STUDIO_HOSTNAME = db.0.knoe.dev
        STORAGE_BACKEND = local
        """,
    )

    cfg = _read_cfg(cfg_path)
    args = Namespace(output_dir=str(tmp_path / "gen"), manifests_dir=str(tmp_path / "k8s"))
    overlay, _meta = _build_overlay(cfg, args)

    assert overlay["ingress"]["hosts"][0]["host"] == "api.knoe.dev"
    assert overlay["studioIngress"]["hosts"][0]["host"] == "db.0.knoe.dev"
    assert overlay["ingress"]["className"] == "gce"
    assert overlay["studioIngress"]["className"] == "gce"
    assert overlay["environment"]["auth"]["API_EXTERNAL_URL"] == "https://api.knoe.dev"
    assert overlay["environment"]["auth"]["GOTRUE_SITE_URL"] == "https://db.0.knoe.dev"
    assert overlay["environment"]["studio"]["SUPABASE_PUBLIC_URL"] == "https://db.0.knoe.dev"
    assert overlay["environment"]["auth"]["GOTRUE_URI_ALLOW_LIST"] == (
        "https://db.0.knoe.dev/**,https://api.knoe.dev/**"
    )


def test_render_supabase_rejects_duplicate_api_and_studio_host_claims(tmp_path: Path, monkeypatch):
    monkeypatch.delenv("SUPABASE_HOST", raising=False)
    monkeypatch.delenv("SUPABASE_HOSTNAME", raising=False)
    monkeypatch.delenv("KNOE_DB_NAMESPACE", raising=False)
    monkeypatch.delenv("KNOE_DB_SERVICE", raising=False)

    cfg_path = tmp_path / "prole.cfg"
    _write_cfg(
        cfg_path,
        """
        [Inputs]
        init_password.db_password = test-password
        init_password.db_host_port = 5432

        [Global]
        NAMESPACE = test-ns
        DEPLOYMENT_MODE = k8s
        SUPABASE_API_HOSTNAME = db.0.knoe.dev
        SUPABASE_STUDIO_HOSTNAME = db.0.knoe.dev
        STORAGE_BACKEND = local
        """,
    )

    cfg = _read_cfg(cfg_path)
    args = Namespace(output_dir=str(tmp_path / "gen"), manifests_dir=str(tmp_path / "k8s"))

    try:
        _build_overlay(cfg, args)
    except SystemExit as exc:
        assert "Duplicate ingress host/path claim detected" in str(exc)
    else:
        raise AssertionError("Expected duplicate host/path guardrail to abort")


def test_render_supabase_rejects_db_cluster_context_for_public_ingress(tmp_path: Path, monkeypatch):
    monkeypatch.delenv("SUPABASE_HOST", raising=False)
    monkeypatch.delenv("SUPABASE_HOSTNAME", raising=False)
    monkeypatch.delenv("KNOE_DB_NAMESPACE", raising=False)
    monkeypatch.delenv("KNOE_DB_SERVICE", raising=False)
    monkeypatch.setenv("KUBECONTEXT", "knoe-dev-cnpg-0")

    cfg_path = tmp_path / "prole.cfg"
    _write_cfg(
        cfg_path,
        """
        [Inputs]
        init_password.db_password = test-password
        init_password.db_host_port = 5432
        init_cluster.app_cluster_kubecontext = knoe-dev-0
        init_cluster.db_cluster_kubecontext = knoe-dev-cnpg-0

        [Global]
        NAMESPACE = test-ns
        DEPLOYMENT_MODE = k8s
        SUPABASE_API_HOSTNAME = api.knoe.dev
        SUPABASE_STUDIO_HOSTNAME = db.0.knoe.dev
        STORAGE_BACKEND = local
        """,
    )

    cfg = _read_cfg(cfg_path)
    args = Namespace(output_dir=str(tmp_path / "gen"), manifests_dir=str(tmp_path / "k8s"))

    try:
        _build_overlay(cfg, args)
    except SystemExit as exc:
        assert "Refusing to render Supabase public ingress for DB cluster context" in str(exc)
    else:
        raise AssertionError("Expected DB-cluster targeting guardrail to abort")


def test_render_supabase_rejects_traefik_class_in_k8s_without_opt_in(tmp_path: Path, monkeypatch):
    monkeypatch.delenv("SUPABASE_HOST", raising=False)
    monkeypatch.delenv("SUPABASE_HOSTNAME", raising=False)
    monkeypatch.delenv("KNOE_DB_NAMESPACE", raising=False)
    monkeypatch.delenv("KNOE_DB_SERVICE", raising=False)

    cfg_path = tmp_path / "prole.cfg"
    _write_cfg(
        cfg_path,
        """
        [Inputs]
        init_password.db_password = test-password
        init_password.db_host_port = 5432

        [Global]
        NAMESPACE = test-ns
        DEPLOYMENT_MODE = k8s
        SUPABASE_API_HOSTNAME = api.knoe.dev
        SUPABASE_STUDIO_HOSTNAME = db.0.knoe.dev
        SUPABASE_INGRESS_CLASS = traefik
        STORAGE_BACKEND = local
        """,
    )

    cfg = _read_cfg(cfg_path)
    args = Namespace(output_dir=str(tmp_path / "gen"), manifests_dir=str(tmp_path / "k8s"))

    try:
        _build_overlay(cfg, args)
    except SystemExit as exc:
        assert "incompatible with k8s mode" in str(exc)
    else:
        raise AssertionError("Expected ingress-class guardrail to abort")