import json
from pathlib import Path
from typing import Dict, List

DATA_DIR = Path(__file__).resolve().parent.parent / "data"


def _load_json(filename: str) -> Dict:
    path = DATA_DIR / filename
    with open(path, encoding="utf-8") as file:
        return json.load(file)


def _sort_builds(builds: List[Dict]) -> List[Dict]:
    return sorted(builds, key=lambda build: build.get("number", 0), reverse=True)


def build_history() -> Dict:
    """Return Jenkins build history data."""
    history = _load_json("build_history.json")
    builds = history.get("builds", [])
    return {"builds": _sort_builds(builds)}