import os
import pytest
from cpl.core.log.log_level import LogLevel
from cpl.core.log.log_settings import LogSettings
from cpl.core.log.logger import Logger
from cpl.core.log.logger_abc import LoggerABC

# --- LogLevel ---


def test_log_level_values():
    assert LogLevel.off.value == "OFF"
    assert LogLevel.trace.value == "TRC"
    assert LogLevel.debug.value == "DEB"
    assert LogLevel.info.value == "INF"
    assert LogLevel.warning.value == "WAR"
    assert LogLevel.error.value == "ERR"
    assert LogLevel.fatal.value == "FAT"


def test_log_level_order():
    levels = list(LogLevel)
    assert levels.index(LogLevel.trace) < levels.index(LogLevel.debug)
    assert levels.index(LogLevel.debug) < levels.index(LogLevel.info)
    assert levels.index(LogLevel.info) < levels.index(LogLevel.warning)
    assert levels.index(LogLevel.warning) < levels.index(LogLevel.error)
    assert levels.index(LogLevel.error) < levels.index(LogLevel.fatal)


def test_log_level_by_name():
    assert LogLevel["info"] == LogLevel.info
    assert LogLevel["error"] == LogLevel.error


# --- LogSettings ---


def test_log_settings_defaults():
    s = LogSettings()
    assert s.path == "logs"
    assert s.filename == "app.log"
    assert s.console == LogLevel.info
    assert s.level == LogLevel.info


def test_log_settings_from_src():
    s = LogSettings({"path": "custom_logs", "filename": "myapp.log"})
    assert s.path == "custom_logs"
    assert s.filename == "myapp.log"


# --- LoggerABC ---


def test_logger_abc_cannot_instantiate():
    with pytest.raises(TypeError):
        LoggerABC()


# --- Logger ---


def test_logger_creates_instance(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    logger = Logger(__name__)
    assert logger is not None


def test_logger_log_file_property(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    logger = Logger(__name__)
    assert logger.log_file.startswith("logs/")
    assert logger.log_file.endswith(".log")


def test_logger_should_log_same_level(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    logger = Logger(__name__)
    assert logger._should_log(LogLevel.info, LogLevel.info) is True
    assert logger._should_log(LogLevel.error, LogLevel.error) is True


def test_logger_should_log_higher_level(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    logger = Logger(__name__)
    assert logger._should_log(LogLevel.error, LogLevel.info) is True
    assert logger._should_log(LogLevel.fatal, LogLevel.debug) is True


def test_logger_should_not_log_lower_level(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    logger = Logger(__name__)
    assert logger._should_log(LogLevel.debug, LogLevel.info) is False
    assert logger._should_log(LogLevel.trace, LogLevel.warning) is False


def test_logger_file_format_message(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    logger = Logger("test_src")
    msg = logger._file_format_message("INF", "2024-01-01 00:00:00.000000", "hello", "world")
    assert "INF" in msg
    assert "hello" in msg
    assert "world" in msg
    assert "test_src" in msg


def test_logger_console_format_message(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    logger = Logger("test_src")
    msg = logger._console_format_message("DEB", "2024-01-01 00:00:00.000000", "debug message")
    assert "DEB" in msg
    assert "debug message" in msg


def test_logger_info_writes_file(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    logger = Logger(__name__)
    logger.info("test info message")
    log_files = list(tmp_path.glob("logs/*.log"))
    assert len(log_files) > 0
    content = log_files[0].read_text()
    assert "test info message" in content


def test_logger_debug_below_info_not_written_to_file(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    # Default level is INFO, so DEBUG should not appear in the file
    logger = Logger(__name__)
    logger.debug("should not appear in file")
    log_files = list(tmp_path.glob("logs/*.log"))
    if log_files:
        content = log_files[0].read_text()
        assert "should not appear in file" not in content


def test_logger_set_level_invalid(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    with pytest.raises(ValueError):
        Logger.set_level("INVALID_LEVEL")


def test_logger_fatal_exits(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    logger = Logger(__name__)
    with pytest.raises(SystemExit):
        logger.fatal("fatal error")


def test_logger_fatal_prevent_quit(tmp_path, monkeypatch):
    monkeypatch.chdir(tmp_path)
    logger = Logger(__name__)
    logger.fatal("fatal no quit", prevent_quit=True)  # Should not raise