import os
from google.genai import types

def get_file_content(working_directory, file_path):
    abs_dir_path = os.path.abspath(working_directory)
    abs_file_path = os.path.abspath(os.path.join(abs_dir_path, file_path))
    if os.path.commonpath([abs_dir_path, abs_file_path]) != abs_dir_path:
        return f'Error: Cannot read "{file_path}" as it is outside the permitted working directory'
    if not os.path.isfile(abs_file_path):
        return f'Error: File not found or is not a regular file: "{file_path}"'
    
    MAX_CHARS = 10000
    try:
        with open(abs_file_path, "r") as f:
            file_content_string = f.read(MAX_CHARS)
            
            if f.read(1):
                file_content_string += f'[...File "{file_path}" truncated at {MAX_CHARS} characters]'
    except Exception as e:
        return f"Error: {e}"
    return file_content_string
    
schema_get_file_content = types.FunctionDeclaration(
    name="get_file_content",
    description="Open and read file content",
    parameters=types.Schema(
        type=types.Type.OBJECT,
        properties={
            "working_directory": types.Schema(
                type=types.Type.STRING,
                description="Directory path to list files from, relative to the working directory (default is the working directory itself)",
            ),
            "file_path": types.Schema(
                type=types.Type.STRING,
                description="File path",
            ),
        },
        required=["file_path"]
    ),
)