"""Tests for the backend profiles (D2) — now wired (Fase 2), no longer skeletons."""

import pytest
from agent_framework import BaseChatClient

from portfolio_optimiser.backends import (
    AzureFoundryBackend,
    ChatBackend,
    LocalBackend,
    Profile,
    get_backend,
    resolve_model,
)


def test_get_backend_by_string() -> None:
    assert isinstance(get_backend("azure"), AzureFoundryBackend)
    assert isinstance(get_backend("local"), LocalBackend)


def test_get_backend_by_enum() -> None:
    assert get_backend(Profile.AZURE).profile is Profile.AZURE
    assert get_backend(Profile.LOCAL).profile is Profile.LOCAL


def test_backends_satisfy_seam() -> None:
    # Structural conformance to the ChatBackend Protocol (the D2 seam).
    assert isinstance(get_backend("azure"), ChatBackend)
    assert isinstance(get_backend("local"), ChatBackend)


def test_unknown_profile_fails_fast() -> None:
    with pytest.raises(ValueError):
        get_backend("on-prem")


def test_local_backend_returns_client_no_network(monkeypatch: pytest.MonkeyPatch) -> None:
    # Construction is offline (no network); the default base_url is loopback.
    monkeypatch.delenv("PORTFOLIO_LOCAL_BASE_URL", raising=False)
    client = get_backend("local").create_chat_client(model="qwen3:4b")
    assert isinstance(client, BaseChatClient)


def test_azure_backend_fails_fast_without_endpoint(monkeypatch: pytest.MonkeyPatch) -> None:
    # Fail-fast (no silent default endpoint) — the operator must supply the Foundry endpoint.
    monkeypatch.delenv("PORTFOLIO_FOUNDRY_PROJECT_ENDPOINT", raising=False)
    with pytest.raises(ValueError):
        get_backend("azure").create_chat_client(model="dummy-deployment")


def test_model_map_resolves_role_to_model() -> None:
    assert resolve_model("local", "proposer") == "qwen3:4b"
    # Unknown role falls back to the profile default (still a non-empty id).
    assert resolve_model(Profile.LOCAL, "no-such-role")