"""Pattern matching from EDGAR filings."""

from typing import Any, Optional


class PatternMatcher:
    """Extract and match patterns from EDGAR filings."""

    def __init__(self) -> None:
        """Initialize the pattern matcher."""
        self.patterns: dict[str, Any] = {}

    def extract_patterns(self, filing_data: dict) -> dict[str, Any]:
        """Extract classification patterns from filing data."""
        # TODO: Implement pattern extraction
        return {}

    def match_pattern(self, account_name: str, transaction_data: list[dict]) -> Optional[dict]:
        """Match account against learned patterns."""
        # TODO: Implement pattern matching
        return None

