"""agent_logging: DEBUG 下载荷、hash_only、去重。"""

from __future__ import annotations

import app.core.agent_logging as agent_logging
from app.core.runtime_constants import agent_log_defaults


class _StubLogger:
    def __init__(self) -> None:
        self.debug_calls: list[tuple[str, tuple[object, ...]]] = []

    def debug(self, msg: str, *args: object, **kwargs: object) -> None:
        self.debug_calls.append((msg, args))


def _clear_dedup() -> None:
    with agent_logging._dedup_lock:
        agent_logging._last_prompt_sha256_by_label.clear()


def test_log_agent_payload_skips_when_not_verbose(monkeypatch: object) -> None:
    monkeypatch.setattr("app.core.config.settings.log_level", "INFO")
    log = _StubLogger()
    agent_logging.log_agent_payload(log, "x.prompt", "hello")
    assert log.debug_calls == []


def test_log_agent_payload_preview_includes_sha12(monkeypatch: object) -> None:
    monkeypatch.setattr("app.core.config.settings.log_level", "DEBUG")
    monkeypatch.setattr("app.core.runtime_constants.agent_log_defaults.prompt_mode", "preview")
    monkeypatch.setattr("app.core.runtime_constants.agent_log_defaults.prompt_dedup", False)
    monkeypatch.setattr("app.core.runtime_constants.agent_log_defaults.max_chars", 100)
    _clear_dedup()
    log = _StubLogger()
    agent_logging.log_agent_payload(log, "Unit.prompt", "hello world")
    assert len(log.debug_calls) == 1
    msg, args = log.debug_calls[0]
    assert "agent_payload" in msg
    assert "sha12=" in msg
    assert args[0] == "Unit.prompt"
    assert args[4] == "hello world"


def test_log_agent_payload_hash_only_no_preview(monkeypatch: object) -> None:
    monkeypatch.setattr("app.core.config.settings.log_level", "DEBUG")
    monkeypatch.setattr("app.core.runtime_constants.agent_log_defaults.prompt_mode", "hash_only")
    monkeypatch.setattr("app.core.runtime_constants.agent_log_defaults.prompt_dedup", False)
    _clear_dedup()
    log = _StubLogger()
    body = "x" * 500
    agent_logging.log_agent_payload(log, "Unit.prompt", body)
    assert len(log.debug_calls) == 1
    msg, args = log.debug_calls[0]
    assert "mode=hash_only" in msg
    assert args[0] == "Unit.prompt"
    assert args[1] == 500
    assert isinstance(args[2], str) and len(args[2]) == 12


def test_log_agent_payload_dedup_second_call_skipped(monkeypatch: object) -> None:
    monkeypatch.setattr("app.core.config.settings.log_level", "DEBUG")
    monkeypatch.setattr("app.core.runtime_constants.agent_log_defaults.prompt_mode", "preview")
    monkeypatch.setattr("app.core.runtime_constants.agent_log_defaults.prompt_dedup", True)
    monkeypatch.setattr("app.core.runtime_constants.agent_log_defaults.max_chars", 200)
    _clear_dedup()
    log = _StubLogger()
    agent_logging.log_agent_payload(log, "DedupLabel.prompt", "same text")
    agent_logging.log_agent_payload(log, "DedupLabel.prompt", "same text")
    assert len(log.debug_calls) == 2
    assert "agent_payload_skipped" in log.debug_calls[1][0]
    skip_args = log.debug_calls[1][1]
    assert skip_args[0] == "DedupLabel.prompt"
    assert skip_args[2] == len("same text")