from __future__ import annotations

from pathlib import Path
from typing import Any, Dict, List
import json
from agentui.pipeline.defaults import default_pipeline


PIPELINE_FILE = Path("pipeline.json")
PRESETS_DIR = Path("presets")


def load_pipeline() -> Dict[str, Any]:
    if PIPELINE_FILE.exists():
        try:
            return json.loads(PIPELINE_FILE.read_text(encoding="utf-8"))
        except Exception:
            pass
    return default_pipeline()


def save_pipeline(pipeline: Dict[str, Any]) -> None:
    PIPELINE_FILE.write_text(json.dumps(pipeline, ensure_ascii=False, indent=2), encoding="utf-8")


def list_presets() -> List[str]:
    PRESETS_DIR.mkdir(parents=True, exist_ok=True)
    return sorted([p.stem for p in PRESETS_DIR.glob("*.json")])


def load_preset(name: str) -> Dict[str, Any]:
    PRESETS_DIR.mkdir(parents=True, exist_ok=True)
    path = PRESETS_DIR / f"{name}.json"
    if not path.exists():
        raise FileNotFoundError(name)
    return json.loads(path.read_text(encoding="utf-8"))


def save_preset(name: str, pipeline: Dict[str, Any]) -> None:
    PRESETS_DIR.mkdir(parents=True, exist_ok=True)
    path = PRESETS_DIR / f"{name}.json"
    path.write_text(json.dumps(pipeline, ensure_ascii=False, indent=2), encoding="utf-8")