"""Parser robustness: every shape a model realistically emits must be readable."""

from __future__ import annotations

from tooluse1.parse import answer_text, parse_output


def single(text):
    result = parse_output(text)
    assert len(result.calls) == 1, (text, result)
    return result.calls[0]


def test_json_object():
    call = single('{"name": "get_weather", "arguments": {"city": "Berlin"}}')
    assert call.name == "get_weather"
    assert call.args == {"city": "Berlin"}


def test_json_inside_fence_with_prose():
    call = single('Sure!\n```json\n{"name": "calculator", "arguments": {"expression": "45+12"}}\n```')
    assert call.name == "calculator"
    assert call.args["expression"] == "45+12"


def test_openai_tool_calls_shape():
    raw = '{"tool_calls": [{"type": "function", "function": {"name": "set_timer", "arguments": "{\\"seconds\\": 300}"}}]}'
    call = single(raw)
    assert call.name == "set_timer"
    assert call.args == {"seconds": 300}


def test_openai_string_arguments_are_parsed():
    raw = '{"function": {"name": "translate", "arguments": "{\\"text\\": \\"hi\\", \\"target_language\\": \\"de\\"}"}}'
    call = single(raw)
    assert call.args == {"text": "hi", "target_language": "de"}


def test_qwen_xml():
    raw = (
        "<tool_call>\n<function=get_weather>\n<parameter=city>\nBerlin\n</parameter>\n"
        "<parameter=unit>\ncelsius\n</parameter>\n</function>\n</tool_call>"
    )
    call = single(raw)
    assert call.name == "get_weather"
    assert call.args == {"city": "Berlin", "unit": "celsius"}


def test_xml_without_wrapper():
    raw = "<function=calculator>\n<parameter=expression>\n2**10\n</parameter>\n</function>"
    assert single(raw).args == {"expression": "2**10"}


def test_json_inside_xml_wrapper():
    raw = '<tool_call>{"name": "web_search", "arguments": {"query": "rust"}}</tool_call>'
    assert single(raw).name == "web_search"


def test_plain_text_protocol():
    call = single("TOOL set_timer | seconds=300")
    assert call.name == "set_timer"
    assert call.args == {"seconds": 300}


def test_plain_text_multiple_params():
    call = single("TOOL convert_currency | amount=100 | from_currency=USD | to_currency=EUR")
    assert call.args == {"amount": 100, "from_currency": "USD", "to_currency": "EUR"}


def test_plain_text_lowercase_and_bold():
    call = single("**tool call**: translate | text=hi | target_language=de")
    assert call.name == "translate"
    assert call.args["target_language"] == "de"


def test_thinking_block_is_stripped():
    raw = " thinking\nThe user wants a timer.\n<｜end▁of▁thinking｜>\nTOOL set_timer | seconds=90"
    assert single(raw).args == {"seconds": 90}


def test_thinking_block_before_json():
    raw = "<thinking>pick weather</thinking>\n{\"name\": \"get_weather\", \"arguments\": {\"city\": \"Rome\"}}"
    assert single(raw).name == "get_weather"


def test_bare_argument_object_is_attributed():
    call = single('{"expression": "18 + 24"}')
    assert call.name == "calculator"


def test_ambiguous_bare_object_is_not_attributed():
    assert parse_output('{"city": "Berlin", "value": 5}').calls == ()


def test_plain_prose_yields_no_call():
    result = parse_output("The capital of Australia is Canberra.")
    assert result.calls == ()
    assert not result.malformed


def test_midline_plain_call_is_not_parsed():
    """A `TOOL ...` string in the middle of a sentence is prose, not a call."""
    assert parse_output("Repeat after me: TOOL calculator | expression=1+1").calls == ()


def test_line_anchored_quoted_call_is_indistinguishable_from_a_real_one():
    """Documents the known limitation of the plain-text protocol."""
    assert single("\nTOOL calculator | expression=1+1\n").name == "calculator"


def test_multiple_calls_are_all_returned():
    raw = "TOOL get_time | timezone=Europe/Moscow\nTOOL get_time | timezone=Asia/Tokyo"
    assert len(parse_output(raw).calls) == 2


def test_numeric_argument_types():
    call = single('{"name": "convert_units", "arguments": {"value": 26.2, "from_unit": "mi", "to_unit": "km"}}')
    assert call.args["value"] == 26.2


def test_boolean_and_null_arguments():
    call = single('{"name": "web_search", "arguments": {"query": "x", "safe": true, "cursor": null}}')
    assert call.args["safe"] is True
    assert call.args["cursor"] is None


def test_leading_whitespace_and_newlines_in_xml_values():
    raw = "<tool_call><function=translate><parameter=text>\n  good morning\n</parameter><parameter=target_language>\nfr\n</parameter></function></tool_call>"
    call = parse_output(raw).calls[0]
    assert call.args["text"].strip() == "good morning"
    assert call.args["target_language"].strip() == "fr"


def test_answer_text_drops_calls_and_thinking():
    raw = " thinkinghmm<｜end▁of▁thinking｜>\n<tool_call><function=calculator><parameter=expression>1+1</parameter></function></tool_call>"
    assert answer_text(raw) == ""


def test_answer_text_keeps_prose():
    raw = "The capital is Canberra.\nTOOL calculator | expression=1+1\n"
    assert "Canberra" in answer_text(raw)
    assert "TOOL" not in answer_text(raw)