"""Tests for Group CRUD and bulk action endpoints.

Follows TDD: tests written first, then implementation.
"""

import json
import os
import tempfile
import pytest
from fastapi.testclient import TestClient


@pytest.fixture(autouse=True)
def reset_config():
    os.environ["CONFIG_PATH"] = os.path.join(os.path.dirname(__file__), "..", "config.json")
    from server.config import _load_config
    import server.config
    server.config._config = None
    yield


@pytest.fixture
def groups_file():
    f = tempfile.NamedTemporaryFile(mode="w", suffix=".json", delete=False)
    json.dump({"groups": []}, f)
    f.close()
    os.environ["GROUPS_PATH"] = f.name
    yield f.name
    os.unlink(f.name)


@pytest.fixture
def client(groups_file):
    from server.group_store import GroupStore
    GroupStore._instance = None
    from server.main import app
    return TestClient(app)


class TestListGroups:
    def test_list_empty(self, client):
        resp = client.get("/api/groups")
        assert resp.status_code == 200
        assert resp.json() == []


class TestCreateGroup:
    def test_create(self, client):
        resp = client.post("/api/groups", json={
            "id": "test", "name": "Test", "services": [{"node": "hf-pdocker-01", "container": "test"}]
        })
        assert resp.status_code == 200
        assert resp.json()["id"] == "test"

    def test_create_then_list(self, client):
        client.post("/api/groups", json={"id": "g1", "name": "G1", "services": []})
        resp = client.get("/api/groups")
        assert len(resp.json()) == 1
        assert resp.json()[0]["name"] == "G1"

    def test_create_duplicate_409(self, client):
        client.post("/api/groups", json={"id": "g1", "name": "G1", "services": []})
        resp = client.post("/api/groups", json={"id": "g1", "name": "Dup", "services": []})
        assert resp.status_code == 409


class TestUpdateGroup:
    def test_update(self, client):
        client.post("/api/groups", json={"id": "g1", "name": "G1", "services": []})
        resp = client.put("/api/groups/g1", json={
            "id": "g1", "name": "Updated", "services": [{"node": "bart", "container": "jellyfin"}]
        })
        assert resp.status_code == 200
        assert resp.json()["name"] == "Updated"
        assert len(resp.json()["services"]) == 1

    def test_update_nonexistent_404(self, client):
        resp = client.put("/api/groups/nope", json={"id": "nope", "name": "N", "services": []})
        assert resp.status_code == 404


class TestDeleteGroup:
    def test_delete(self, client):
        client.post("/api/groups", json={"id": "g1", "name": "G1", "services": []})
        resp = client.delete("/api/groups/g1")
        assert resp.status_code == 200
        assert len(client.get("/api/groups").json()) == 0

    def test_delete_nonexistent_404(self, client):
        resp = client.delete("/api/groups/nope")
        assert resp.status_code == 404


class TestPersistence:
    def test_persists_to_file(self, client, groups_file):
        client.post("/api/groups", json={"id": "g1", "name": "G1", "services": []})
        with open(groups_file) as f:
            data = json.load(f)
        assert len(data["groups"]) == 1


class TestBulkActions:
    def test_start_nonexistent_group_404(self, client):
        assert client.post("/api/groups/nope/start").status_code == 404

    def test_stop_nonexistent_group_404(self, client):
        assert client.post("/api/groups/nope/stop").status_code == 404

    def test_restart_nonexistent_group_404(self, client):
        assert client.post("/api/groups/nope/restart").status_code == 404