#!/usr/bin/env bash
set -euo pipefail

# Cursor hook: preToolUse (Shell)
# Strip Cursor co-author trailers from git commit/amend commands before execution.
# Note: read stdin before Python (a heredoc would consume hook JSON).

INPUT="$(cat)"

python3 -c '
import json
import re
import sys

raw = sys.argv[1]
try:
    data = json.loads(raw) if raw.strip() else {}
except Exception:
    print(json.dumps({"permission": "allow"}))
    raise SystemExit(0)

tool_input = data.get("tool_input") or {}
if not isinstance(tool_input, dict):
    print(json.dumps({"permission": "allow"}))
    raise SystemExit(0)

command = (tool_input.get("command") or "").strip()
if not command or "git" not in command:
    print(json.dumps({"permission": "allow"}))
    raise SystemExit(0)

if not re.search(r"\bgit\b.*\b(commit|commit\s+-a|commit\s+--amend)\b", command):
    print(json.dumps({"permission": "allow"}))
    raise SystemExit(0)

cleaned = command
patterns = [
    r"""\s*--trailer\s+(['"])Co-authored-by:\s*Cursor\s*<cursoragent@cursor\.com>\1""",
    r"""\s*--trailer\s+Co-authored-by:\s*Cursor\s*<cursoragent@cursor\.com>""",
    r"""\s*--footer\s+(['"])Co-authored-by:\s*Cursor\s*<cursoragent@cursor\.com>\1""",
    r"""\s*--footer\s+Co-authored-by:\s*Cursor\s*<cursoragent@cursor\.com>""",
]
for pattern in patterns:
    cleaned = re.sub(pattern, "", cleaned, flags=re.I)

cleaned = re.sub(r"\s{2,}", " ", cleaned).strip()

if cleaned == command:
    print(json.dumps({"permission": "allow"}))
else:
    tool_input["command"] = cleaned
    print(json.dumps({
        "permission": "allow",
        "updated_input": tool_input,
        "agent_message": "Removed Cursor co-author trailer from git commit command."
    }))
' "$INPUT"