"""Unit tests for display helpers."""

import json

from display import (
    build_display_content,
    format_tool_call_prompt,
    format_tool_calls_for_display,
)


def test_build_display_content_empty():
    assert build_display_content("", "") == ""


def test_build_display_content_only_content():
    assert build_display_content("", "hello") == "hello"


def test_build_display_content_streaming_reasoning_open():
    """While content is empty the thinking block should be open."""
    out = build_display_content("step 1...", "")
    assert "<details" in out
    assert " open>" in out
    assert "Thinking..." in out
    assert "step 1..." in out


def test_build_display_content_completed_reasoning_collapsed():
    out = build_display_content("step 1...", "final answer")
    assert "Thinking complete" in out
    assert " open>" not in out
    assert "final answer" in out


def test_format_single_tool_call_dict():
    tc = {
        "id": "call_1",
        "type": "function",
        "function": {"name": "ping", "arguments": json.dumps({"x": 1})},
    }
    out = format_tool_calls_for_display([tc])
    assert "ping" in out
    assert '"x": 1' in out


def test_format_single_tool_call_invalid_args_kept_raw():
    tc = {"function": {"name": "ping", "arguments": "{not json"}}
    out = format_tool_calls_for_display([tc])
    assert "{not json" in out


def test_format_tool_call_prompt_header():
    tc = {"function": {"name": "ping", "arguments": "{}"}}
    out = format_tool_call_prompt(tc, 2, 5)
    assert "Function call (2/5)" in out
    assert "ping" in out