import os
from functions.config import FILE_LENGTH_LIMIT
from google.genai import types

def get_file_content(working_directory, file_path):
    abs_working_dir = os.path.abspath(working_directory)
    abs_file_path = os.path.abspath(os.path.join(working_directory, file_path))
    if not abs_file_path.startswith(abs_working_dir):
        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}"'
    try:
        with open(abs_file_path, "r") as f:
            content = f.read(FILE_LENGTH_LIMIT)
            if os.path.getsize(abs_file_path) > FILE_LENGTH_LIMIT:
                content += (
                    f'[...File "{file_path}" truncated at {FILE_LENGTH_LIMIT} characters]'
                )
        return content
    except Exception as e:
        return f'Error reading file "{file_path}": {e}'

schema_get_file_content = types.FunctionDeclaration(
    name="get_file_content",
    description="Read file contents.",
    parameters=types.Schema(
        type=types.Type.OBJECT,
        properties={
            "working_directory": types.Schema(
                type=types.Type.STRING,
                description="The directory to read the file from. If not provided, lists files in the working directory itself.",
            ),
            "file_path": types.Schema(
                type=types.Type.STRING,
                description="The file to read the content from. If not provided, the function will not work."
            )
        },
    ),
)