#!/usr/bin/env bash
# Copyright (c) 2015-2026 Dotfiles. All rights reserved.
# Appends the EUXIS branding signature to every commit message.
# Signature source: ~/.euxis/data/config/branding/signature.txt

set -euo pipefail

# R5: validate commit message file argument
if [[ -z "${1:-}" || ! -f "${1:-}" ]]; then
  exit 0 # No file provided — git will handle the error
fi

COMMIT_MSG_FILE="$1"
COMMIT_SOURCE="${2:-}"

# Skip merge commits, amends with existing signature, and squash
case "$COMMIT_SOURCE" in
  merge | squash) exit 0 ;;
esac

SIGNATURE_FILE="$HOME/.euxis/data/config/branding/signature.txt"

# Only append if the signature file exists and message doesn't already have it
if [[ -f "$SIGNATURE_FILE" ]]; then
  signature=$(cat "$SIGNATURE_FILE")
  if ! grep -qF "THE ARCHITECT" "$COMMIT_MSG_FILE" 2>/dev/null; then
    printf '\n%s\n' "$signature" >>"$COMMIT_MSG_FILE"
  fi
fi