from pathlib import Path
from typing import Optional
import hashlib


def read_file_safe(file_path: Path, encoding: str = "utf-8") -> Optional[str]:
    """Safely read a file, handling encoding errors."""
    try:
        return file_path.read_text(encoding=encoding, errors="replace")
    except Exception:
        return None


def write_file_safe(content: str, file_path: Path, encoding: str = "utf-8") -> bool:
    """Safely write to a file."""
    try:
        ensure_directory(file_path.parent)
        file_path.write_text(content, encoding=encoding)
        return True
    except Exception:
        return False


def ensure_directory(path: Path) -> None:
    """Ensure directory exists."""
    path.mkdir(parents=True, exist_ok=True)


def get_file_hash(file_path: Path, algorithm: str = "md5") -> Optional[str]:
    """Get hash of file contents."""
    try:
        content = file_path.read_bytes()
        if algorithm == "md5":
            return hashlib.md5(content).hexdigest()
        elif algorithm == "sha256":
            return hashlib.sha256(content).hexdigest()
        elif algorithm == "sha1":
            return hashlib.sha1(content).hexdigest()
        else:
            return hashlib.md5(content).hexdigest()
    except Exception:
        return None


def find_files_pattern(directory: Path, patterns: list) -> list:
    """Find files matching patterns using fnmatch."""
    from fnmatch import fnmatch
    matches = []

    for root, dirs, files in directory.walk():
        for file in files:
            file_path = Path(root) / file
            rel_path = str(file_path.relative_to(directory))

            for pattern in patterns:
                if fnmatch(file, pattern) or fnmatch(rel_path, pattern):
                    matches.append(file_path)
                    break

    return matches