#!/usr/bin/env python3
"""PostToolUse hook: after Write/Edit on a design document, run gdd_lint and
feed failures back to the writing agent. Never crashes; best-effort."""
import json
import re
import subprocess
import sys
from pathlib import Path

try:
    payload = json.load(sys.stdin)
except Exception:
    sys.exit(0)

path = ""
try:
    tool_input = payload.get("tool_input") or {}
    path = tool_input.get("file_path") or ""
except Exception:
    sys.exit(0)

if not path or not re.search(r"design[\\/].*\.md$", path.replace("\\", "/")):
    sys.exit(0)
if re.search(r"review|report|legacy-", Path(path).name, re.I):
    sys.exit(0)
# 与 gdd_lint.DEFAULT_EXCLUDE 同源：索引/概念层文档不在门禁默认范围，钩子同样跳过
if Path(path).name in {"game-concept.md", "game-pillars.md", "systems-index.md"}:
    sys.exit(0)
# 设计推演件（analysis 两件套的另一半）：以散文推演为主，不适用 GDD 格式门禁
norm = path.replace("\\", "/")
if Path(path).name == "analysis.md" or "/analysis/" in norm:
    sys.exit(0)
if not Path("tools/gdd_lint.py").exists():
    sys.exit(0)

try:
    result = subprocess.run(
        [sys.executable, "tools/gdd_lint.py", path, "--json"],
        capture_output=True, text=True, timeout=30,
    )
    data = json.loads(result.stdout or "[]")
    failures = [r for r in data if r.get("issues")]
    if failures:
        lines = ["[gdd_lint] 刚写入的文档未过格式门禁，请修复后再结束："]
        for r in failures:
            for issue in r.get("issues", []):
                lines.append(f"  ! {issue}")
        print("\n".join(lines), file=sys.stderr)
        sys.exit(2)
except Exception:
    pass
sys.exit(0)