#!/usr/bin/env python3

# SPDX-FileCopyrightText: (C) 2025 Enno Tensing <tenno+containerctl@suij.in>
#
# SPDX-License-Identifier: GPL-2.0-only

"""Implement a simple logging framework."""

import datetime
from pathlib import Path
from typing import TypeAlias

UNKNOWN = -1
ERROR = 0
WARNING = 1
INFO = 2
DEBUG = 3

LogLevel: TypeAlias = int


class Log:
    """Class for Logging."""

    level: LogLevel = ERROR
    messages: list = []
    logfile: Path

    def __init__(self, path: str) -> None:
        """Init for Log."""
        if path == "":
            path = "/dev/stdout"
        self.logfile = Path(path)

    def log_error(self, msg: str) -> None:
        """Log an error."""
        if self.level >= ERROR:
            now = self.timestamp()
            prefix = "EE"
            log_message = f"[{now}] ({prefix}) {msg}"
            self.write_message(log_message)

    def log_warning(self, msg: str) -> None:
        """Log a warning."""
        if self.level >= WARNING:
            now = self.timestamp()
            prefix = "WW"
            log_message = f"[{now}] ({prefix}) {msg}"
            self.write_message(log_message)

    def log_info(self, msg: str) -> None:
        """Log an information."""
        if self.level >= INFO:
            now = self.timestamp()
            prefix = "II"
            log_message = f"[{now}] ({prefix}) {msg}"
            self.write_message(log_message)

    def log_debug(self, msg: str) -> None:
        """Log a debug message."""
        if self.level >= DEBUG:
            now = self.timestamp()
            prefix = "DD"
            log_message = f"[{now}] ({prefix}) {msg}"
            self.write_message(log_message)

    def write_message(self, msg: str) -> None:
        """Write the message."""
        print(msg)
        if self.logfile == Path("/dev/stdout"):
            return
        with self.logfile.open("a+", encoding="utf-8") as f:
            f.write(msg)

    def timestamp(self) -> str:
        """Log timestamp."""
        return datetime.datetime.now(tz=datetime.UTC).strftime(
            "%Y-%m-%d %H:%M:%S",
        )