"""Tests for router /v1/models endpoint — Issue #2."""
import json
import asyncio
import pytest
from unittest.mock import patch
from httpx import Response, ASGITransport, AsyncClient

from main import app as router_app

SIDECAR_URL = "http://localhost:8081"


def test_v1_models_returns_profiles_from_sidecar():
    """Router /v1/models proxies to sidecar /models/available."""
    sidecar_profiles = [
        {"id": "qwen-3-8b", "name": "Qwen 3 8B", "model_path": "/path/model.gguf", "flags": {"n_ctx": 8192}},
    ]

    async def run_test():
        import respx
        with respx.mock:
            respx.get(f"{SIDECAR_URL}/models/available").mock(
                return_value=Response(200, json=sidecar_profiles)
            )
            with patch("main.SIDECAR_URL", SIDECAR_URL):
                transport = ASGITransport(app=router_app)
                async with AsyncClient(transport=transport, base_url="http://test") as ac:
                    resp = await ac.get("/v1/models")
            assert resp.status_code == 200
            data = resp.json()
            assert "data" in data
            assert len(data["data"]) == 1
            assert data["data"][0]["id"] == "qwen-3-8b"
            assert data["data"][0]["object"] == "model"

    asyncio.run(run_test())


def test_v1_models_returns_empty_list_when_sidecar_empty():
    """Router /v1/models returns empty list when sidecar has no profiles."""
    async def run_test():
        import respx
        with respx.mock:
            respx.get(f"{SIDECAR_URL}/models/available").mock(
                return_value=Response(200, json=[])
            )
            with patch("main.SIDECAR_URL", SIDECAR_URL):
                transport = ASGITransport(app=router_app)
                async with AsyncClient(transport=transport, base_url="http://test") as ac:
                    resp = await ac.get("/v1/models")
            assert resp.status_code == 200
            data = resp.json()
            assert data["data"] == []

    asyncio.run(run_test())


def test_v1_models_returns_503_when_sidecar_down():
    """Router /v1/models returns 503 when sidecar is unreachable."""
    async def run_test():
        import respx
        with respx.mock:
            respx.get(f"{SIDECAR_URL}/models/available").mock(
                side_effect=Exception("connection refused")
            )
            with patch("main.SIDECAR_URL", SIDECAR_URL):
                transport = ASGITransport(app=router_app)
                async with AsyncClient(transport=transport, base_url="http://test") as ac:
                    resp = await ac.get("/v1/models")
            assert resp.status_code == 503

    asyncio.run(run_test())