from typing import Optional

from loglens.parsers.apache_parser import ApacheParser
from loglens.parsers.base import LogFormat
from loglens.parsers.json_parser import JSONParser
from loglens.parsers.syslog_parser import SyslogParser


class ParserFactory:
    """Factory for creating parsers based on format."""

    _parsers = {
        LogFormat.JSON: JSONParser(),
        LogFormat.SYSLOG: SyslogParser(),
        LogFormat.APACHE: ApacheParser(),
    }

    @classmethod
    def get_parser(cls, format_enum: LogFormat):
        """Get a parser for the specified format."""
        return cls._parsers.get(format_enum)

    @classmethod
    def detect_format(cls, sample_line: str) -> LogFormat:
        """Detect the format of a log line."""
        for fmt, parser in cls._parsers.items():
            if parser.parse(sample_line):
                return fmt
        return LogFormat.RAW