"""Justice Ledger + Verdict Card persistence (atomic JSON file)."""
from __future__ import annotations
import json
import os
from pathlib import Path
from typing import Any

LEDGER_PATH = Path(os.environ.get("LEDGER_PATH", "data/ledger.json"))


def _load() -> dict[str, Any]:
    if not LEDGER_PATH.exists():
        return {"verdicts": [], "totals": {"just": 0, "wrongful": 0, "cold": 0, "mistrial": 0}}
    return json.loads(LEDGER_PATH.read_text())


def record_verdict(case_id: str, suspect: str | None, method: str, outcome: str, suspicion: float) -> dict:
    LEDGER_PATH.parent.mkdir(parents=True, exist_ok=True)
    led = _load()
    led["verdicts"].append({
        "case_id": case_id, "suspect": suspect, "method": method,
        "outcome": outcome, "suspicion": suspicion,
    })
    led["totals"][outcome] = led["totals"].get(outcome, 0) + 1
    LEDGER_PATH.write_text(json.dumps(led, indent=2))
    return led


def read_ledger() -> dict:
    return _load()