"""Bash history parser."""

import os
from datetime import datetime
from typing import List, Optional

from .base import HistoryParser, ParsedCommand


class BashHistoryParser(HistoryParser):
    """Parser for Bash history files."""
    
    SHELL_NAME = "bash"
    DEFAULT_HISTORY_FILE = os.path.expanduser("~/.bash_history")
    
    def parse_file(self, filepath: str) -> List[ParsedCommand]:
        """Parse a bash history file."""
        try:
            with open(filepath, 'r', encoding='utf-8', errors='replace') as f:
                content = f.read()
            return self.parse_content(content)
        except FileNotFoundError:
            return []
        except Exception:
            return []
    
    def parse_content(self, content: str) -> List[ParsedCommand]:
        """Parse bash history content from a string."""
        commands = []
        lines = content.splitlines()
        
        for line_num, line in enumerate(lines, start=1):
            line = line.rstrip('\n\r')
            if line and not line.startswith('#'):
                cmd = ParsedCommand(
                    raw_command=line,
                    line_number=line_num
                )
                commands.append(cmd)
        
        return commands