"""
文件管理器模块
提供文件的读写、列表、删除等操作
"""

import os
import json
import shutil
from typing import List, Dict, Any
from pathlib import Path


class FileManager:
    """
    文件管理器类
    
    负责处理所有文件相关的操作，包括读写、列表、删除等
    """
    
    def __init__(self, base_path: str = None):
        """
        初始化文件管理器
        
        Args:
            base_path (str): 基础路径，默认为当前工作目录
        """
        self.base_path = Path(base_path) if base_path else Path.cwd()
        self.workspace_path = self.base_path / 'workspace'
        
        # 确保工作目录存在
        self.workspace_path.mkdir(exist_ok=True)
    
    def list_files(self, path: str = '', include_hidden: bool = False) -> List[Dict[str, Any]]:
        """
        列出指定路径下的文件和目录
        
        Args:
            path (str): 相对路径，相对于工作目录
            include_hidden (bool): 是否包含隐藏文件
            
        Returns:
            List[Dict[str, Any]]: 文件和目录信息列表
        """
        target_path = self.workspace_path / path
        
        if not target_path.exists():
            raise FileNotFoundError(f"Path does not exist: {path}")
        
        if not target_path.is_dir():
            raise NotADirectoryError(f"Path is not a directory: {path}")
        
        items = []
        
        for item in sorted(target_path.iterdir()):
            if not include_hidden and item.name.startswith('.'):
                continue
            
            stat = item.stat()
            items.append({
                'name': item.name,
                'path': str(item.relative_to(self.workspace_path)),
                'type': 'directory' if item.is_dir() else 'file',
                'size': stat.st_size if item.is_file() else 0,
                'modified': stat.st_mtime,
                'extension': item.suffix.lower() if item.is_file() else '',
                'is_markdown': item.suffix.lower() == '.md'
            })
        
        return items
    
    def read_file(self, path: str) -> str:
        """
        读取文件内容
        
        Args:
            path (str): 文件路径，相对于工作目录
            
        Returns:
            str: 文件内容
        """
        file_path = self.workspace_path / path
        
        if not file_path.exists():
            raise FileNotFoundError(f"File not found: {path}")
        
        if not file_path.is_file():
            raise IsADirectoryError(f"Path is a directory: {path}")
        
        try:
            with open(file_path, 'r', encoding='utf-8') as f:
                return f.read()
        except UnicodeDecodeError:
            # 尝试其他编码
            with open(file_path, 'r', encoding='gbk') as f:
                return f.read()
    
    def write_file(self, path: str, content: str, create_dirs: bool = True) -> None:
        """
        写入文件内容
        
        Args:
            path (str): 文件路径，相对于工作目录
            content (str): 文件内容
            create_dirs (bool): 是否自动创建目录
        """
        file_path = self.workspace_path / path
        
        if create_dirs:
            file_path.parent.mkdir(parents=True, exist_ok=True)
        
        with open(file_path, 'w', encoding='utf-8') as f:
            f.write(content)
    
    def delete_file(self, path: str) -> None:
        """
        删除文件或目录
        
        Args:
            path (str): 文件或目录路径，相对于工作目录
        """
        target_path = self.workspace_path / path
        
        if not target_path.exists():
            raise FileNotFoundError(f"Path does not exist: {path}")
        
        if target_path.is_dir():
            shutil.rmtree(target_path)
        else:
            target_path.unlink()
    
    def create_directory(self, path: str) -> None:
        """
        创建目录
        
        Args:
            path (str): 目录路径，相对于工作目录
        """
        dir_path = self.workspace_path / path
        dir_path.mkdir(parents=True, exist_ok=True)
    
    def file_exists(self, path: str) -> bool:
        """
        检查文件是否存在
        
        Args:
            path (str): 文件路径，相对于工作目录
            
        Returns:
            bool: 文件是否存在
        """
        return (self.workspace_path / path).exists()
    
    def get_file_info(self, path: str) -> Dict[str, Any]:
        """
        获取文件详细信息
        
        Args:
            path (str): 文件路径，相对于工作目录
            
        Returns:
            Dict[str, Any]: 文件详细信息
        """
        file_path = self.workspace_path / path
        
        if not file_path.exists():
            raise FileNotFoundError(f"File not found: {path}")
        
        stat = file_path.stat()
        
        return {
            'name': file_path.name,
            'path': str(file_path.relative_to(self.workspace_path)),
            'type': 'directory' if file_path.is_dir() else 'file',
            'size': stat.st_size,
            'modified': stat.st_mtime,
            'created': stat.st_ctime,
            'extension': file_path.suffix.lower(),
            'is_markdown': file_path.suffix.lower() == '.md'
        }
    
    def search_files(self, pattern: str, path: str = '') -> List[str]:
        """
        搜索文件
        
        Args:
            pattern (str): 搜索模式（支持通配符）
            path (str): 搜索起始路径，相对于工作目录
            
        Returns:
            List[str]: 匹配的文件路径列表
        """
        target_path = self.workspace_path / path
        
        if not target_path.exists():
            return []
        
        matches = []
        for file_path in target_path.rglob(pattern):
            if file_path.is_file():
                matches.append(str(file_path.relative_to(self.workspace_path)))
        
        return matches
    
    def copy_file(self, src_path: str, dest_path: str) -> None:
        """
        复制文件
        
        Args:
            src_path (str): 源文件路径
            dest_path (str): 目标文件路径
        """
        src = self.workspace_path / src_path
        dest = self.workspace_path / dest_path
        
        if not src.exists():
            raise FileNotFoundError(f"Source file not found: {src_path}")
        
        dest.parent.mkdir(parents=True, exist_ok=True)
        shutil.copy2(src, dest)
    
    def move_file(self, src_path: str, dest_path: str) -> None:
        """
        移动文件
        
        Args:
            src_path (str): 源文件路径
            dest_path (str): 目标文件路径
        """
        src = self.workspace_path / src_path
        dest = self.workspace_path / dest_path
        
        if not src.exists():
            raise FileNotFoundError(f"Source file not found: {src_path}")
        
        dest.parent.mkdir(parents=True, exist_ok=True)
        shutil.move(str(src), str(dest))