#!/bin/sh

# Check for Claude Code attribution in commit messages
# This hook prevents commits that contain self-promotional attribution

commit_msg_file="$1"
commit_msg=$(cat "$commit_msg_file")

# Define patterns that should be rejected
claude_patterns="🤖 Generated with.*Claude Code
Generated with.*Claude Code
Claude Code
claude.ai/code
Co-Authored-By: Claude
noreply@anthropic.com"

# Check each pattern
echo "$claude_patterns" | while IFS= read -r pattern; do
  if [ -n "$pattern" ] && echo "$commit_msg" | grep -q "$pattern"; then
    echo "❌ COMMIT REJECTED: Claude Code attribution detected"
    echo ""
    echo "🤖 AUTOMATED LLM INSTRUCTION:"
    echo "Remove all Claude Code attribution from commit messages."
    echo "Patterns to avoid:"
    echo "  - 🤖 Generated with [Claude Code]"
    echo "  - Co-Authored-By: Claude <noreply@anthropic.com>"
    echo "  - References to claude.ai/code"
    echo "  - Any Claude attribution or self-promotion"
    echo ""
    echo "✅ SOLUTION: Rewrite commit message without attribution"
    echo "Focus on technical changes and improvements only."
    echo ""
    echo "Current commit message contains: '$pattern'"
    exit 1
  fi
done

# Check if any pattern matched (the while loop runs in a subshell)
if echo "$commit_msg" | grep -E -q "(🤖.*Generated.*Claude|Claude Code|claude\.ai/code|Co-Authored-By:.*Claude|noreply@anthropic\.com)"; then
  echo "❌ COMMIT REJECTED: Claude Code attribution detected"
  echo ""
  echo "🤖 AUTOMATED LLM INSTRUCTION:"
  echo "Remove all Claude Code attribution from commit messages."
  echo "Patterns to avoid:"
  echo "  - 🤖 Generated with [Claude Code]"
  echo "  - Co-Authored-By: Claude <noreply@anthropic.com>"
  echo "  - References to claude.ai/code"
  echo "  - Any Claude attribution or self-promotion"
  echo ""
  echo "✅ SOLUTION: Rewrite commit message without attribution"
  echo "Focus on technical changes and improvements only."
  exit 1
fi

echo "✅ Commit message approved"
exit 0