from __future__ import annotations

import httpx
import pytest
import respx

from app.llm.base import ProviderError, RateLimitError
from app.llm.groq import GroqProvider

URL = "https://api.groq.com/openai/v1/chat/completions"


def _provider() -> GroqProvider:
    return GroqProvider(api_key="k")


@respx.mock
async def test_groq_returns_content():
    respx.post(URL).mock(
        return_value=httpx.Response(
            200,
            json={"choices": [{"finish_reason": "stop", "message": {"content": "hola"}}]},
        )
    )
    r = await _provider().chat(messages=[{"role": "user", "content": "x"}], tools=[], model="m")
    assert r.content == "hola"
    assert r.tool_calls == []


@respx.mock
async def test_groq_parses_tool_calls():
    respx.post(URL).mock(
        return_value=httpx.Response(
            200,
            json={
                "choices": [
                    {
                        "finish_reason": "tool_calls",
                        "message": {
                            "content": None,
                            "tool_calls": [
                                {
                                    "id": "c1",
                                    "type": "function",
                                    "function": {
                                        "name": "lookup_order",
                                        "arguments": '{"email":"a@b.c"}',
                                    },
                                }
                            ],
                        },
                    }
                ]
            },
        )
    )
    r = await _provider().chat(
        messages=[{"role": "user", "content": "x"}], tools=[], model="llama-3.1-8b-instant"
    )
    assert r.tool_calls[0].name == "lookup_order"
    assert r.tool_calls[0].arguments == {"email": "a@b.c"}


@respx.mock
async def test_groq_captures_token_usage():
    respx.post(URL).mock(
        return_value=httpx.Response(
            200,
            json={
                "choices": [{"finish_reason": "stop", "message": {"content": "ok"}}],
                "usage": {"prompt_tokens": 120, "completion_tokens": 30, "total_tokens": 150},
            },
        )
    )
    r = await _provider().chat(messages=[{"role": "user", "content": "x"}], tools=[], model="m")
    assert r.usage["total_tokens"] == 150
    assert r.usage["prompt_tokens"] == 120


@respx.mock
async def test_groq_429_raises_ratelimit():
    respx.post(URL).mock(return_value=httpx.Response(429, text="slow down"))
    with pytest.raises(RateLimitError):
        await _provider().chat(messages=[{"role": "user", "content": "x"}], tools=[], model="m")


@respx.mock
async def test_groq_500_raises_provider_error():
    respx.post(URL).mock(return_value=httpx.Response(500, text="boom"))
    with pytest.raises(ProviderError):
        await _provider().chat(messages=[{"role": "user", "content": "x"}], tools=[], model="m")


@respx.mock
async def test_groq_malformed_200_raises_provider_error_for_failover():
    # 200 OK but no choices → must become ProviderError so the router fails over.
    respx.post(URL).mock(return_value=httpx.Response(200, json={"unexpected": True}))
    with pytest.raises(ProviderError):
        await _provider().chat(messages=[{"role": "user", "content": "x"}], tools=[], model="m")