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"
_NOTES_TEMPLATE_PATH = REPO_ROOT / "supabase" / "helm" / "knoe-supabase" / "templates" / "NOTES.txt"


def _load_render_module():
    spec = importlib.util.spec_from_file_location("knoe_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
_split_frontdoor_docs = _render_mod._split_frontdoor_docs


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 / "knoe.cfg"
    _write_cfg(
        cfg_path,
        """
        [User]
        supabase_hostname = db.knoe.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.knoe.org"
    assert overlay["environment"]["auth"]["API_EXTERNAL_URL"] == "https://db.knoe.org"
    assert overlay["environment"]["auth"]["GOTRUE_SITE_URL"] == "https://db.knoe.org"
    assert overlay["environment"]["studio"]["SUPABASE_PUBLIC_URL"] == "https://db.knoe.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 / "knoe.cfg"
    _write_cfg(
        cfg_path,
        """
        [User]
        supabase_hostname = http://db.knoe.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.knoe.org"
    assert overlay["environment"]["auth"]["API_EXTERNAL_URL"] == "http://db.knoe.org"
    assert overlay["environment"]["studio"]["SUPABASE_PUBLIC_URL"] == "http://db.knoe.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 / "knoe.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.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"))
    overlay, _meta = _build_overlay(cfg, args)

    assert overlay["ingress"]["hosts"][0]["host"] == "api.0.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.0.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.0.knoe.dev/**"
    )


def test_render_supabase_derives_env_indexed_api_host_for_k8s(tmp_path: Path, monkeypatch):
    monkeypatch.delenv("SUPABASE_HOST", raising=False)
    monkeypatch.delenv("SUPABASE_HOSTNAME", raising=False)
    monkeypatch.delenv("SUPABASE_API_HOSTNAME", raising=False)
    monkeypatch.delenv("KNOE_DB_NAMESPACE", raising=False)
    monkeypatch.delenv("KNOE_DB_SERVICE", raising=False)

    cfg_path = tmp_path / "knoe.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
        AUTH_HOSTNAME = api.knoe.dev
        SUPABASE_STUDIO_HOSTNAME = db.33.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.33.knoe.dev"
    assert overlay["studioIngress"]["hosts"][0]["host"] == "db.33.knoe.dev"
    assert overlay["environment"]["auth"]["API_EXTERNAL_URL"] == "https://api.33.knoe.dev"
    assert overlay["environment"]["auth"]["GOTRUE_SITE_URL"] == "https://db.33.knoe.dev"
    assert overlay["environment"]["auth"]["GOTRUE_URI_ALLOW_LIST"] == (
        "https://db.33.knoe.dev/**,https://api.33.knoe.dev/**"
    )


def test_supabase_notes_template_uses_studio_ingress_host():
    notes_template = _NOTES_TEMPLATE_PATH.read_text(encoding="utf-8")

    assert (
        "Visit the Studio dashboard at https://{{ (index .Values.studioIngress.hosts 0).host }}"
        in notes_template
    )
    assert "(index .Values.ingress.hosts 0).host" not in notes_template


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 / "knoe.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_allows_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 / "knoe.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.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"))

    overlay, _meta = _build_overlay(cfg, args)

    assert overlay["ingress"]["hosts"][0]["host"] == "api.0.knoe.dev"
    assert overlay["studioIngress"]["hosts"][0]["host"] == "db.0.knoe.dev"


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 / "knoe.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.0.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")


def test_render_supabase_splits_frontdoor_manifests_for_db_cluster_rollout():
    rendered_manifest = "\n---\n".join(
        (
            '{"apiVersion":"apps/v1","kind":"Deployment","metadata":{"name":"supabase-auth","namespace":"supabase"}}',
            '{"apiVersion":"apps/v1","kind":"Deployment","metadata":{"name":"supabase-kong","namespace":"supabase"},"spec":{"selector":{"matchLabels":{"app":"supabase-kong"}},"template":{"metadata":{"labels":{"app":"supabase-kong"}},"spec":{"containers":[{"name":"kong","image":"kong:latest"}]}}}}',
            '{"apiVersion":"v1","kind":"Service","metadata":{"name":"supabase-kong","namespace":"supabase"},"spec":{"ports":[{"name":"proxy","port":8000}],"selector":{"app.kubernetes.io/name":"knoe-supabase-kong","app.kubernetes.io/instance":"supabase"}}}',
            '{"apiVersion":"networking.k8s.io/v1","kind":"Ingress","metadata":{"name":"supabase-kong","namespace":"supabase"},"spec":{"rules":[{"host":"api.0.knoe.dev"}]}}',
            '{"apiVersion":"apps/v1","kind":"Deployment","metadata":{"name":"supabase-studio","namespace":"supabase"},"spec":{"selector":{"matchLabels":{"app":"supabase-studio"}},"template":{"metadata":{"labels":{"app":"supabase-studio"}},"spec":{"containers":[{"name":"studio","image":"supabase/studio:latest"}]}}}}',
            '{"apiVersion":"networking.k8s.io/v1","kind":"Ingress","metadata":{"name":"supabase-studio","namespace":"supabase"},"spec":{"rules":[{"host":"db.0.knoe.dev"}]}}',
        )
    )

    app_docs, frontdoor_docs = _split_frontdoor_docs(rendered_manifest)

    app_names = {doc["metadata"]["name"] for doc in app_docs}
    frontdoor_names = {doc["metadata"]["name"] for doc in frontdoor_docs}
    frontdoor_name_kind = {(doc["metadata"]["name"], doc["kind"]) for doc in frontdoor_docs}

    assert "supabase-auth" in app_names
    assert "supabase-kong" not in app_names
    assert "supabase-studio" not in app_names
    assert "supabase-kong" in frontdoor_names
    assert "supabase-studio" in frontdoor_names
    assert ("supabase-kong", "Deployment") not in frontdoor_name_kind
    assert ("supabase-studio", "Deployment") not in frontdoor_name_kind

    kong_service = next(doc for doc in frontdoor_docs if doc["metadata"]["name"] == "supabase-kong" and doc["kind"] == "Service")
    assert kong_service["spec"]["selector"]["app.kubernetes.io/instance"] == "supabase-frontdoor-db"
    for doc in frontdoor_docs:
        assert doc["metadata"]["labels"]["app.kubernetes.io/instance"] == "supabase-frontdoor-db"


def test_render_supabase_split_frontdoor_preserves_complete_yaml_docs():
    rendered_manifest = """
# Source: knoe-supabase/templates/kong-service.yaml
apiVersion: v1
kind: Service
metadata:
  name: supabase-kong
spec:
  selector:
    app.kubernetes.io/name: kong
    app.kubernetes.io/instance: supabase
  ports:
    - name: proxy
      port: 8000
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: supabase-kong
spec:
  selector:
    matchLabels:
      app: supabase-kong
  template:
    metadata:
      labels:
        app: supabase-kong
    spec:
      containers:
        - name: kong
          image: kong:latest
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: supabase-kong
spec:
  rules:
    - host: api.0.knoe.dev
"""

    app_docs, frontdoor_docs = _split_frontdoor_docs(rendered_manifest, namespace="supabase")

    assert app_docs == []
    assert len(frontdoor_docs) == 2
    assert {doc["kind"] for doc in frontdoor_docs} == {"Service", "Ingress"}
    for doc in frontdoor_docs:
        assert doc["metadata"]["name"] == "supabase-kong"
        assert doc["metadata"]["namespace"] == "supabase"
        assert doc["metadata"]["labels"]["app.kubernetes.io/instance"] == "supabase-frontdoor-db"
        assert "spec" in doc
    kong_service = next(doc for doc in frontdoor_docs if doc["kind"] == "Service")
    assert kong_service["spec"]["selector"]["app.kubernetes.io/instance"] == "supabase-frontdoor-db"


def test_render_supabase_split_frontdoor_allows_custom_release_label():
    rendered_manifest = """
apiVersion: v1
kind: Service
metadata:
  name: supabase-kong
spec:
  selector:
    app.kubernetes.io/name: kong
    app.kubernetes.io/instance: supabase
  ports:
    - name: proxy
      port: 8000
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: supabase-kong
spec:
  rules:
    - host: api.0.knoe.dev
"""

    _, frontdoor_docs = _split_frontdoor_docs(rendered_manifest, frontdoor_release="supabase-db-custom")

    kong_service = next(doc for doc in frontdoor_docs if doc["kind"] == "Service")
    assert kong_service["spec"]["selector"]["app.kubernetes.io/instance"] == "supabase-db-custom"
    for doc in frontdoor_docs:
        assert doc["metadata"]["labels"]["app.kubernetes.io/instance"] == "supabase-db-custom"


def test_render_supabase_split_frontdoor_skips_invalid_kong_stubs():
    rendered_manifest = """
apiVersion: apps/v1
kind: Deployment
metadata:
  name: supabase-auth
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: supabase-kong
spec: {}
---
apiVersion: v1
kind: Service
metadata:
  name: supabase-kong
spec:
  ports: []
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: supabase-kong
spec: {}
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: supabase-studio
spec:
  rules:
    - host: db.0.knoe.dev
"""

    app_docs, frontdoor_docs = _split_frontdoor_docs(rendered_manifest)

    app_names = {doc["metadata"]["name"] for doc in app_docs}
    frontdoor_name_kind = {(doc["metadata"]["name"], doc["kind"]) for doc in frontdoor_docs}

    assert "supabase-auth" in app_names
    assert "supabase-kong" not in app_names
    assert ("supabase-kong", "Deployment") not in frontdoor_name_kind
    assert ("supabase-kong", "Service") not in frontdoor_name_kind
    assert ("supabase-kong", "Ingress") not in frontdoor_name_kind
    assert ("supabase-studio", "Ingress") in frontdoor_name_kind