import logging

import pytest

from kanta.logging import configure_logging, log_change


@pytest.fixture(autouse=True)
def _reset_kanta_loggers():
    yield
    for name in ("kanta", "kanta.transaction", "kanta.bootstrap", "kanta.migration"):
        logger = logging.getLogger(name)
        logger.setLevel(logging.NOTSET)
        logger.propagate = True
        logger.handlers.clear()


def test_configure_logging_defaults():
    kanta_logger = logging.getLogger("kanta")
    configure_logging()
    assert kanta_logger.level == logging.INFO
    assert not kanta_logger.propagate
    assert kanta_logger.handlers


def test_configure_logging_disables_specific_loggers():
    configure_logging(bootstrap=False, migration=False, transaction=False)
    assert not logging.getLogger("kanta.bootstrap").propagate
    assert not logging.getLogger("kanta.migration").propagate
    assert not logging.getLogger("kanta.transaction").propagate


def test_configure_logging_skiproot_false_leaves_kanta_propagation():
    kanta_logger = logging.getLogger("kanta")
    kanta_logger.handlers.clear()
    configure_logging(bootstrap=False, skiproot=False)
    assert kanta_logger.propagate
    assert not kanta_logger.handlers
    assert not logging.getLogger("kanta.bootstrap").propagate


def test_log_change_no_diff(capsys):
    kanta_logger = logging.getLogger("kanta")
    kanta_logger.handlers.clear()
    configure_logging()
    log_change("test", {})
    captured = capsys.readouterr()
    assert "test" in captured.err


def test_log_change_appends_extra_string(capsys):
    kanta_logger = logging.getLogger("kanta")
    kanta_logger.handlers.clear()
    configure_logging()
    log_change("export", {}, extra="mydb.db")
    captured = capsys.readouterr()
    assert "export" in captured.err
    assert "mydb.db" in captured.err


def test_log_change_headerfmt_replaces_header(capsys):
    kanta_logger = logging.getLogger("kanta")
    kanta_logger.handlers.clear()
    configure_logging()
    log_change(
        "update",
        {},
        headerfmt=lambda action, user, extra: f"CUSTOM {action} {extra['id']}",
        extra={"id": 7},
    )
    captured = capsys.readouterr()
    assert "CUSTOM update 7" in captured.err


def test_log_change_headerfmt_none_falls_back(capsys):
    kanta_logger = logging.getLogger("kanta")
    kanta_logger.handlers.clear()
    configure_logging()
    log_change("update", {}, user="alice", headerfmt=lambda *args: None)
    captured = capsys.readouterr()
    assert "update" in captured.err
    assert "alice" in captured.err


def test_log_change_log_diff_false(capsys):
    kanta_logger = logging.getLogger("kanta")
    kanta_logger.handlers.clear()
    configure_logging()
    log_change("update", {"counter": 5}, previous={}, log_diff=False)
    captured = capsys.readouterr()
    assert "update" in captured.err
    assert "counter" not in captured.err


def test_log_change_log_header_false(capsys):
    kanta_logger = logging.getLogger("kanta")
    kanta_logger.handlers.clear()
    configure_logging()
    log_change("update", {"counter": 5}, previous={}, log_header=False)
    captured = capsys.readouterr()
    assert "update" not in captured.err
    assert "counter" in captured.err


def test_log_change_both_disabled_logs_nothing(capsys):
    kanta_logger = logging.getLogger("kanta")
    kanta_logger.handlers.clear()
    configure_logging()
    log_change("update", {"counter": 5}, previous={}, log_header=False, log_diff=False)
    captured = capsys.readouterr()
    assert captured.err == ""