"""Tests of the backend api using pytest."""

import uuid
import logging
from pathlib import Path
from httpx import Response
import pytest

from fastapi.testclient import TestClient

from sshecret.crypto import generate_private_key, generate_public_key_string
from sshecret_backend.app import create_backend_app
from sshecret_backend.testing import create_test_token
from sshecret_backend.view_models import AuditView
from sshecret_backend.settings import BackendSettings


LOG = logging.getLogger()
handler = logging.StreamHandler()
formatter = logging.Formatter("'%(asctime)s - %(levelname)s - %(message)s'")
handler.setFormatter(formatter)
LOG.addHandler(handler)
LOG.setLevel(logging.DEBUG)


def make_test_key() -> str:
    """Generate a test key."""
    private_key = generate_private_key()
    return generate_public_key_string(private_key.public_key())


def create_client(
    test_client: TestClient,
    name: str,
    public_key: str | None = None,
    description: str | None = None,
) -> Response:
    """Create client."""
    if not public_key:
        public_key = make_test_key()
    data = {
        "name": name,
        "public_key": public_key,
    }
    if description:
        data["description"] = description
    create_response = test_client.post("/api/v1/clients", json=data)
    return create_response


@pytest.fixture(name="test_client")
def create_client_fixture(tmp_path: Path):
    """Test client fixture."""

    db_file = tmp_path / "backend.db"
    print(f"DB File: {db_file.absolute()}")
    settings = BackendSettings(database=str(db_file.absolute()))
    app = create_backend_app(settings)

    token = create_test_token(settings)

    test_client = TestClient(app, headers={"X-API-Token": token})
    yield test_client


def test_missing_token(test_client: TestClient) -> None:
    """Test logging in with missing token."""
    # Save headers
    old_headers = test_client.headers
    test_client.headers = {}
    response = test_client.get("/api/v1/clients/", headers={})
    assert response.status_code == 422
    test_client.headers = old_headers


def test_incorrect_token(test_client: TestClient) -> None:
    """Test logging in with missing token."""
    response = test_client.get("/api/v1/clients/", headers={"X-API-Token": "WRONG"})
    assert response.status_code == 401


def test_with_token(test_client: TestClient) -> None:
    """Test with a valid token."""
    response = test_client.get("/api/v1/clients/")
    assert response.status_code == 200
    data = response.json()
    assert data["total_results"] == 0


def test_create_client(test_client: TestClient) -> None:
    """Test creating a client."""
    client_name = "test"
    client_publickey = make_test_key()
    create_response = create_client(test_client, client_name, client_publickey)
    assert create_response.status_code == 200
    response = test_client.get("/api/v1/clients")
    assert response.status_code == 200
    clients_result = response.json()
    clients = clients_result["clients"]
    assert isinstance(clients, list)
    client = clients[0]
    assert isinstance(client, dict)
    assert client.get("name") == client_name
    assert client.get("created_at") is not None


def test_delete_client(test_client: TestClient) -> None:
    """Test creating a client."""
    client_name = "test"
    create_response = create_client(
        test_client,
        client_name,
    )
    assert create_response.status_code == 200

    resp = test_client.delete("/api/v1/clients/test")
    assert resp.status_code == 200

    resp = test_client.get("/api/v1/clients/test")
    assert resp.status_code == 404


def test_add_secret(test_client: TestClient) -> None:
    """Test adding a secret to a client."""
    client_name = "test"
    client_publickey = make_test_key()
    create_response = create_client(
        test_client,
        client_name,
        client_publickey,
    )
    assert create_response.status_code == 200
    secret_name = "mysecret"
    secret_value = "shhhh"
    data = {"name": secret_name, "secret": secret_value, "description": "A test secret"}
    response = test_client.post("/api/v1/clients/test/secrets/", json=data)
    assert response.status_code == 200
    # Get it back
    get_response = test_client.get("/api/v1/clients/test/secrets/mysecret")
    assert get_response.status_code == 200
    secret_body = get_response.json()
    assert secret_body["name"] == data["name"]
    assert secret_body["secret"] == data["secret"]


def test_delete_secret(test_client: TestClient) -> None:
    """Test deleting a secret."""
    test_add_secret(test_client)
    resp = test_client.delete("/api/v1/clients/test/secrets/mysecret")
    assert resp.status_code == 200
    get_response = test_client.get("/api/v1/clients/test/secrets/mysecret")
    assert get_response.status_code == 404


def test_put_add_secret(test_client: TestClient) -> None:
    """Test adding secret via PUT."""
    # Use the test_create_client function to create a client.
    test_create_client(test_client)
    secret_name = "mysecret"
    secret_value = "shhhh"
    data = {"name": secret_name, "secret": secret_value, "description": None}
    response = test_client.put(
        "/api/v1/clients/test/secrets/mysecret",
        json={"value": secret_value},
    )
    assert response.status_code == 200
    response_model = response.json()
    del response_model["created_at"]
    del response_model["updated_at"]
    assert response_model == data


def test_put_update_secret(test_client: TestClient) -> None:
    """Test updating a client secret."""
    test_add_secret(test_client)
    new_value = "itsasecret"
    update_response = test_client.put(
        "/api/v1/clients/test/secrets/mysecret",
        json={"value": new_value},
    )
    assert update_response.status_code == 200
    expected = {"name": "mysecret", "secret": new_value}
    response_model = update_response.json()

    assert {
        "name": response_model["name"],
        "secret": response_model["secret"],
    } == expected
    # Ensure that the updated_at has been set.
    assert "updated_at" in response_model


def test_audit_logging(test_client: TestClient) -> None:
    """Test audit logging."""
    public_key = make_test_key()
    create_client_resp = create_client(test_client, "test", public_key)
    assert create_client_resp.status_code == 200
    secrets = {"secret1": "foo", "secret2": "bar", "secret3": "baz"}
    for name, secret in secrets.items():
        add_resp = test_client.post(
            "/api/v1/clients/test/secrets/",
            json={"name": name, "secret": secret},
        )
        assert add_resp.status_code == 200

    # Fetch the entire client.
    get_client_resp = test_client.get("/api/v1/clients/test")
    assert get_client_resp.status_code == 200

    # Fetch the audit log
    audit_log_resp = test_client.get("/api/v1/audit/")
    assert audit_log_resp.status_code == 200
    audit_logs = audit_log_resp.json()
    assert isinstance(audit_logs, dict)
    audit_count = audit_logs.get("total")
    assert audit_count is not None
    assert audit_count > 0
    assert "results" in audit_logs

    for entry in audit_logs["results"]:
        # Let's try to reassemble the objects
        audit_log = AuditView.model_validate(entry)
        assert audit_log is not None

def test_secret_invalidation(test_client: TestClient) -> None:
    """Test secret invalidation."""
    initial_key = make_test_key()
    create_client_resp = create_client(test_client, "test", initial_key)
    assert create_client_resp.status_code == 200
    secrets = {"secret1": "foo", "secret2": "bar", "secret3": "baz"}
    for name, secret in secrets.items():
        add_resp = test_client.post(
            "/api/v1/clients/test/secrets/",
            json={"name": name, "secret": secret},
        )
        assert add_resp.status_code == 200

    # Update the public-key. This should cause all secrets to be invalidated
    # and no longer associated with a client.
    new_key = make_test_key()
    update_resp = test_client.post(
        "/api/v1/clients/test/public-key",
        json={"public_key": new_key},
    )
    assert update_resp.status_code == 200

    # Fetch the client. The list of secrets should be empty.
    get_resp = test_client.get("/api/v1/clients/test")
    assert get_resp.status_code == 200
    client = get_resp.json()
    secrets = client.get("secrets")
    assert bool(secrets) is False


def test_client_default_policies(
    test_client: TestClient,
) -> None:
    """Test client policies."""
    public_key = make_test_key()
    resp = create_client(test_client, "test")
    assert resp.status_code == 200
    # Fetch policies, should return *
    resp = test_client.get("/api/v1/clients/test/policies/")
    assert resp.status_code == 200

    policies = resp.json()

    assert policies["sources"] == ["0.0.0.0/0", "::/0"]


def test_client_policy_update_one(test_client: TestClient) -> None:
    """Update client policy with single policy."""
    public_key = make_test_key()
    resp = create_client(test_client, "test", public_key)
    assert resp.status_code == 200

    policy = ["192.0.2.1"]
    resp = test_client.put("/api/v1/clients/test/policies/", json={"sources": policy})
    assert resp.status_code == 200

    resp = test_client.get("/api/v1/clients/test/policies/")
    assert resp.status_code == 200

    policies = resp.json()

    assert policies["sources"] == policy


def test_client_policy_update_advanced(test_client: TestClient) -> None:
    """Test other policy update scenarios."""
    public_key = make_test_key()
    resp = create_client(test_client, "test", public_key)
    assert resp.status_code == 200

    policy = ["192.0.2.1", "198.18.0.0/24"]

    resp = test_client.put("/api/v1/clients/test/policies/", json={"sources": policy})
    assert resp.status_code == 200

    resp = test_client.get("/api/v1/clients/test/policies/")
    assert resp.status_code == 200

    policies = resp.json()

    assert "192.0.2.1" in policies["sources"]
    assert "198.18.0.0/24" in policies["sources"]

    # Try to set it to something incorrect

    policy = ["obviosly_wrong"]

    resp = test_client.put("/api/v1/clients/test/policies/", json={"sources": policy})
    assert resp.status_code == 422
    # Check that the old value is still there

    resp = test_client.get("/api/v1/clients/test/policies/")
    assert resp.status_code == 200

    policies = resp.json()

    assert "192.0.2.1" in policies["sources"]
    assert "198.18.0.0/24" in policies["sources"]

    # Clear the policies
    #


def test_client_policy_update_unset(test_client: TestClient) -> None:
    """Test clearing the client policy."""
    public_key = make_test_key()
    resp = create_client(test_client, "test", public_key)
    assert resp.status_code == 200
    policy = ["192.0.2.1", "198.18.0.0/24"]

    resp = test_client.put("/api/v1/clients/test/policies/", json={"sources": policy})
    assert resp.status_code == 200

    policies = resp.json()

    assert "192.0.2.1" in policies["sources"]
    assert "198.18.0.0/24" in policies["sources"]

    # Now we clear the policies

    resp = test_client.put("/api/v1/clients/test/policies/", json={"sources": []})
    assert resp.status_code == 200

    policies = resp.json()

    assert policies["sources"] == ["0.0.0.0/0", "::/0"]


def test_client_update(test_client: TestClient) -> None:
    """Test generic update of a client."""

    public_key = make_test_key()
    resp = create_client(test_client, "test", public_key, "PRE")
    assert resp.status_code == 200
    resp = test_client.get("/api/v1/clients/test")
    assert resp.status_code == 200
    client_data = resp.json()
    assert client_data["description"] == "PRE"

    # Update the description
    new_client_data = {
        "name": "test",
        "description": "POST",
        "public_key": client_data["public_key"],
    }
    resp = test_client.put("/api/v1/clients/test", json=new_client_data)
    assert resp.status_code == 200

    client_data = resp.json()
    assert client_data["description"] == "POST"

    resp = test_client.get("/api/v1/clients/test")
    assert resp.status_code == 200
    client_data = resp.json()
    assert client_data["description"] == "POST"


def test_get_secret_list(test_client: TestClient) -> None:
    """Test the secret to client map view."""
    # Make 4 clients
    for x in range(4):
        public_key = make_test_key()
        create_client(test_client, f"client-{x}", public_key)
        # Create a secret that only this client has.
        resp = test_client.put(
            f"/api/v1/clients/client-{x}/secrets/client-{x}", json={"value": "SECRET"}
        )
        assert resp.status_code == 200
        # Create a secret that all of them have.
        resp = test_client.put(
            f"/api/v1/clients/client-{x}/secrets/commonsecret", json={"value": "SECRET"}
        )
        assert resp.status_code == 200

    # Get the secret list
    resp = test_client.get("/api/v1/secrets/")
    assert resp.status_code == 200
    data = resp.json()
    assert isinstance(data, list)
    assert len(data) == 5
    for entry in data:
        if entry["name"] == "commonsecret":
            assert len(entry["clients"]) == 4
        else:
            assert len(entry["clients"]) == 1
            assert entry["clients"][0] == entry["name"]


def test_get_secret_clients(test_client: TestClient) -> None:
    """Get the clients for a single secret."""
    for x in range(4):
        public_key = make_test_key()
        create_client(test_client, f"client-{x}", public_key)
        # Create a secret that every second of them have.
        if x % 2 == 1:
            continue
        resp = test_client.put(
            f"/api/v1/clients/client-{x}/secrets/commonsecret", json={"value": "SECRET"}
        )
        assert resp.status_code == 200

    resp = test_client.get("/api/v1/secrets/commonsecret")
    assert resp.status_code == 200

    data = resp.json()
    assert data["name"] == "commonsecret"
    assert "client-0" in data["clients"]
    assert "client-1" not in data["clients"]
    assert len(data["clients"]) == 2


def test_searching(test_client: TestClient) -> None:
    """Test searching."""
    for x in range(4):
        # Create four clients
        create_client(test_client, f"client-{x}")

    # Create one with a different name.
    create_client(test_client, "othername")

    # Search for a specific one.
    resp = test_client.get("/api/v1/clients/", params={"name": "othername"})
    assert resp.status_code == 200
    result = resp.json()
    assert result["total_results"] == 1
    assert result["clients"][0]["name"] == "othername"
    client_id = result["clients"][0]["id"]

    # Search by ID
    resp = test_client.get("/api/v1/clients/", params={"id": client_id})
    assert resp.status_code == 200
    result = resp.json()
    assert result["total_results"] == 1
    assert result["clients"][0]["name"] == "othername"

    # Search for the four similarly named ones
    resp = test_client.get("/api/v1/clients/", params={"name__like": "client-%"})
    assert resp.status_code == 200
    result = resp.json()
    assert result["total_results"] == 4
    assert str(result["clients"][0]["name"]).startswith("client-")


def test_operations_with_id(test_client: TestClient) -> None:
    """Test operations using ID instead of name."""
    create_client(test_client, "test")
    resp = test_client.get("/api/v1/clients/")
    assert resp.status_code == 200
    data = resp.json()
    client = data["clients"][0]
    client_id = client["id"]
    resp = test_client.get(f"/api/v1/clients/{client_id}")
    assert resp.status_code == 200
    data = resp.json()
    assert data["name"] == "test"


def test_write_audit_log(test_client: TestClient) -> None:
    """Test writing to the audit log."""
    params = {
        "subsystem": "backend",
        "operation": "read",
        "message": "Test Message"
    }
    resp = test_client.post("/api/v1/audit", json=params)
    assert resp.status_code == 200

    resp = test_client.get("/api/v1/audit")

    assert resp.status_code == 200
    data = resp.json()
    entry = data["results"][0]
    for key, value in params.items():
        assert entry[key] == value


def test_filter_audit_log(test_client: TestClient) -> None:
    """Test filtering of audit logs."""
    # prepare some audit logs
    messages = [
        {
            "subsystem": "backend",
            "operation": "login",
            "client_id": str(uuid.uuid4()),
            "client_name": "foo",
            "origin": "192.0.2.1",
            "message": "message1",
        },
        {
            "subsystem": "backend",
            "operation": "create",
            "client_id": str(uuid.uuid4()),
            "client_name": "foo",
            "origin": "192.0.2.1",
            "secret_id": str(uuid.uuid4()),
            "message": "message2",
        },
        {
            "subsystem": "test",
            "operation": "deny",
            "client_id": str(uuid.uuid4()),
            "client_name": "bar",
            "origin": "192.0.2.2",
            "message": "message3",
        },
    ]
    for message in messages:
        test_client.post("/api/v1/audit", json=message)

    # find all client_name=foo entries
    resp = test_client.get("/api/v1/audit/", params={"client_name": "foo"})
    assert resp.status_code == 200
    data = resp.json()

    assert data["total"] == 2
    assert len(data["results"]) == 2

    # Get the one message from 'bar'
    resp = test_client.get("/api/v1/audit/", params={"client_name": "bar"})

    assert resp.status_code == 200
    data = resp.json()

    assert data["total"] == 1
    assert len(data["results"]) == 1

    assert data["results"][0]["operation"] == "deny"

    # test combining fields to get the login event

    resp = test_client.get("/api/v1/audit/", params={"client_name": "foo", "operation": "login"})
    data = resp.json()

    assert data["total"] == 1

    assert data["results"][0]["operation"] == "login"
    assert data["results"][0]["message"] == "message1"