from __future__ import annotations

import asyncio
from functools import partial
from pathlib import Path
from typing import Any

from app.agents.tools.types import RegisteredTool, ToolResult

PROJECT_ROOT = Path(__file__).resolve().parents[5]


def _validate_path(raw_path: str) -> Path:
    """경로를 검증하고 절대 경로로 변환합니다."""
    resolved = (PROJECT_ROOT / raw_path).resolve()
    if not resolved.is_relative_to(PROJECT_ROOT):
        raise ValueError(f"프로젝트 외부 경로 접근 불가: {raw_path}")
    return resolved


def _write_sync(path: Path, content: str) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(content, encoding="utf-8")


def create_write_file_tool() -> RegisteredTool:
    """파일 쓰기 도구를 생성합니다."""

    async def execute(params: dict[str, Any]) -> ToolResult:
        raw_path: str = params["path"]
        content: str = params["content"]

        try:
            path = _validate_path(raw_path)
        except ValueError as e:
            return ToolResult(data=f"오류: {e}")

        loop = asyncio.get_running_loop()
        try:
            await loop.run_in_executor(None, partial(_write_sync, path, content))
        except Exception as e:
            return ToolResult(data=f"파일 쓰기 실패: {e}")

        return ToolResult(data=f"파일 작성 완료: {raw_path}")

    return RegisteredTool(
        name="write_file",
        description="파일에 내용을 씁니다. 프로젝트 내 파일만 수정 가능합니다.",
        compact_description="파일 쓰기",
        concurrency_safe=False,
        execute=execute,
    )