"""Tests for agent.replay_cleanup — shared replay-tail sanitizers.

These functions were extracted from gateway/run.py so every resume surface
(messaging gateway AND TUI/WebUI gateway) strips poisoned tool-call tails the
same way. Regression coverage for #29086 (WebUI session permanently stuck
because the dangling tool-call tail was replayed on every resume).
"""

from agent.replay_cleanup import (
    is_interrupted_tool_result,
    strip_dangling_tool_call_tail,
    strip_interrupted_tool_tails,
    sanitize_replay_history,
)


def _user(text):
    return {"role": "user", "content": text}


def _assistant_tc(name):
    return {
        "role": "assistant",
        "content": "",
        "tool_calls": [
            {"id": "c1", "type": "function", "function": {"name": name, "arguments": "{}"}}
        ],
    }


def _tool(content):
    return {"role": "tool", "tool_call_id": "c1", "content": content}


def test_is_interrupted_tool_result_markers():
    assert is_interrupted_tool_result("[Command interrupted]")
    assert is_interrupted_tool_result("foo\nexit_code: 130 (interrupt)\nbar")
    assert not is_interrupted_tool_result("exit_code: 0\nclean output")
    assert not is_interrupted_tool_result("ordinary tool output")
    assert not is_interrupted_tool_result(None)


def test_strip_dangling_tool_call_tail_removes_unanswered_tail():
    history = [_user("hi"), _assistant_tc("write_file")]
    out = strip_dangling_tool_call_tail(history)
    assert out == [_user("hi")]


def test_strip_dangling_tool_call_tail_preserves_answered_pair():
    history = [_user("hi"), _assistant_tc("read_file"), _tool("contents")]
    out = strip_dangling_tool_call_tail(history)
    assert out == history  # answered -> untouched


def test_strip_interrupted_tool_tails_removes_interrupted_block():
    history = [_user("hi"), _assistant_tc("terminal"), _tool("[Command interrupted]")]
    out = strip_interrupted_tool_tails(history)
    assert out == [_user("hi")]


def test_strip_interrupted_tool_tails_preserves_successful_block():
    history = [_user("hi"), _assistant_tc("read_file"), _tool("ok"),
               {"role": "assistant", "content": "done"}]
    out = strip_interrupted_tool_tails(history)
    assert out == history


def test_strip_interrupted_tool_tails_removes_orphan_interrupted_tool():
    history = [_user("hi"), _tool("[Command interrupted] exit_code: 130 interrupt")]
    out = strip_interrupted_tool_tails(history)
    assert out == [_user("hi")]


def test_sanitize_replay_history_combines_both():
    # interrupted block in the middle + dangling tail at the end
    history = [
        _user("first"),
        _assistant_tc("terminal"), _tool("[Command interrupted]"),
        _user("second"),
        _assistant_tc("write_file"),  # dangling
    ]
    out = sanitize_replay_history(history)
    assert out == [_user("first"), _user("second")]


def test_sanitize_replay_history_noop_on_clean_history():
    history = [_user("hi"), {"role": "assistant", "content": "hello"}]
    assert sanitize_replay_history(history) == history


def test_sanitize_replay_history_empty():
    assert sanitize_replay_history([]) == []