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

# Reads a newline-separated list of changed files from stdin.
# Outputs "pipeline-a" or "pipeline-b" to stdout.
# Pipeline B: all files are infra-only (config, docs, workflows).
# Pipeline A: any non-infra file present.

detect_pipeline() {
  local all_infra=true

  while IFS= read -r file; do
    [ -z "$file" ] && continue

    local filename
    local dir
    filename=$(basename "$file")
    dir=$(dirname "$file")

    if [[ "$dir" == ".github" || "$dir" == .github/* ]] || \
       [[ "$dir" == "infra" || "$dir" == infra/* ]] || \
       [[ "$dir" == "org" || "$dir" == org/* ]] || \
       [[ "$filename" == *.md ]] || \
       [[ "$filename" == .eslintrc* ]] || \
       [[ "$filename" == .prettierrc* ]] || \
       [[ "$filename" == renovate.json* ]] || \
       [[ "$filename" == .gitignore ]] || \
       [[ "$filename" == .editorconfig ]] || \
       [[ "$filename" == LICENSE ]] || \
       [[ "$filename" == Dockerfile ]] || \
       [[ "$filename" == docker-compose* ]] || \
       [[ "$filename" == Makefile ]]; then
      continue
    else
      all_infra=false
      break
    fi
  done

  if [ "$all_infra" = true ]; then
    echo "pipeline-b"
  else
    echo "pipeline-a"
  fi
}

if [ "${BASH_SOURCE[0]}" = "$0" ]; then
  detect_pipeline
fi