"""Adapter: knip --reporter json output → Finding[]."""
from __future__ import annotations

import json

from scripts.manifest import Finding


def parse_knip_output(stdout: str) -> list[Finding]:
    try:
        payload = json.loads(stdout)
    except json.JSONDecodeError:
        return []
    if not isinstance(payload, dict):
        return []
    out: list[Finding] = []
    for issue in payload.get("issues", []):
        file_path = issue.get("file", "")
        for export in issue.get("exports", []):
            name = export.get("name", "")
            line = export.get("line", 0)
            out.append(Finding(
                tool="knip",
                rule_id="knip:dead-export",
                severity="medium",
                file=file_path,
                line=line,
                end_line=line,
                message=f"unused export '{name}'",
            ))
    return out