from __future__ import annotations

import pytest

from app.llm.base import ProviderError, parse_openai_choice


def test_parse_valid_tool_call():
    data = {"choices": [{"message": {"content": None, "tool_calls": [
        {"id": "1", "function": {"name": "search_products", "arguments": '{"query": "hose"}'}}
    ]}, "finish_reason": "tool_calls"}]}
    res = parse_openai_choice(data)
    assert res.tool_calls[0].name == "search_products"
    assert res.tool_calls[0].arguments == {"query": "hose"}


def test_empty_string_args_become_empty_dict():
    data = {"choices": [{"message": {"tool_calls": [
        {"id": "1", "function": {"name": "reorder", "arguments": "  "}}
    ]}}]}
    assert parse_openai_choice(data).tool_calls[0].arguments == {}


def test_malformed_tool_args_raise_to_failover():
    # a weak model emitted invalid JSON for a required-arg tool — must NOT be
    # silently dispatched with {}; raise so the router fails over.
    data = {"choices": [{"message": {"tool_calls": [
        {"id": "1", "function": {"name": "lookup_order", "arguments": "{email: not json"}}
    ]}}]}
    with pytest.raises(ProviderError):
        parse_openai_choice(data)


def test_plain_text_answer_parsed():
    data = {"choices": [{"message": {"content": "hello"}, "finish_reason": "stop"}],
            "usage": {"total_tokens": 5}}
    res = parse_openai_choice(data)
    assert res.content == "hello"
    assert res.usage["total_tokens"] == 5