"""Adapter: zizmor --format sarif normalized to Finding[]."""
from __future__ import annotations

import json
import re

from scripts.manifest import Finding


_LEVEL = {"error": "high", "warning": "medium", "note": "low"}
_CWE_RE = re.compile(r"(CWE-\d+)")


def parse_zizmor_output(stdout: str) -> list[Finding]:
    try:
        payload = json.loads(stdout)
    except json.JSONDecodeError:
        return []
    out: list[Finding] = []
    for run in payload.get("runs", []):
        cwe_by_rule: dict[str, str] = {}
        for rule in run.get("tool", {}).get("driver", {}).get("rules", []):
            for tag in rule.get("properties", {}).get("tags", []):
                m = _CWE_RE.match(tag)
                if m:
                    cwe_by_rule[rule["id"]] = m.group(1)
                    break
        for result in run.get("results", []):
            rule_id = result.get("ruleId", "unknown")
            locations = result.get("locations", [])
            if not locations:
                continue
            phys = locations[0].get("physicalLocation", {})
            uri = phys.get("artifactLocation", {}).get("uri", "")
            region = phys.get("region", {})
            start_line = region.get("startLine", 0)
            end_line = region.get("endLine", start_line)
            out.append(Finding(
                tool="zizmor",
                rule_id=rule_id,
                severity=_LEVEL.get(result.get("level", "warning"), "medium"),
                file=uri,
                line=start_line,
                end_line=end_line,
                message=result.get("message", {}).get("text", ""),
                cwe=cwe_by_rule.get(rule_id),
            ))
    return out