"""Adapter: jscpd JSON output → Finding[]."""
from __future__ import annotations

import json

from scripts.manifest import Finding


def parse_jscpd_output(stdout: str) -> list[Finding]:
    try:
        payload = json.loads(stdout)
    except json.JSONDecodeError:
        return []
    if not isinstance(payload, dict):
        return []
    out: list[Finding] = []
    for dup in payload.get("duplicates", []):
        first = dup.get("firstFile", {})
        second = dup.get("secondFile", {})
        lines = dup.get("lines", 0)
        severity = "medium" if lines >= 30 else "low"
        out.append(Finding(
            tool="jscpd",
            rule_id=f"jscpd:clone-{lines}lines",
            severity=severity,
            file=first.get("name", ""),
            line=first.get("start", 0),
            end_line=first.get("end", 0),
            message=(
                f"duplicate of {second.get('name', '')}:"
                f"{second.get('start', 0)}-{second.get('end', 0)} ({lines} lines)"
            ),
        ))
    return out